Malware Analysis Trusted File is actually TA505 Threat Actor (Found by Human)

Sandbox Breaker

Level 9
Thread author
Well-known
Jan 6, 2022
389
We found this out in the wild. One of our analysts noted that the file is listed as trusted but further down the execution chain... a malicious DLL is loaded. TA505 is the threat actor behind this threat. This goes to show that not even automatic analyses are perfect. Human + AI is the way.



File Listed As Trusted By Intezer and VT ✅👺


DLL loaded from Encoded PS Script spawned from the MSI suspect file☣️👨‍🔬
 

harlan4096

Moderator
Verified
Staff Member
Malware Hunter
Well-known
Apr 28, 2015
8,607

1674494615627.png
 

harlan4096

Moderator
Verified
Staff Member
Malware Hunter
Well-known
Apr 28, 2015
8,607
Just tried with KES11.11:
Event: Blocked
Application: File that launches another file
User: HARLAN4096-KES-\HARLAN4096-PC
User type: Initiator
Component: Exploit Prevention
Result description: Blocked
Type: Trojan
Name: PDM:Exploit.Win32.Generic
Threat level: High
Object type: Process
Object path: C:\Windows\Installer
Object name: MSI8765.tmp
Reason: Dangerous action
Databases release date: Today, 23/01/2023 1:37:00
SHA256: 9DBAF4E4632E70652FF72BB7890C35E3B9CD7A6939B29B5EEEC0C636D098C64E
MD5: 6AAC525CFCDD6D3978C451BBA2BB9CB3

1674496117807.png
 

Sandbox Breaker

Level 9
Thread author
Well-known
Jan 6, 2022
389
We found this out in the wild. One of our analysts noted that the file is listed as trusted but further down the execution chain... a malicious DLL is loaded. TA505 is the threat actor behind this threat. This goes to show that not even automatic analyses are perfect. Human + AI is the way.



File Listed As Trusted By Intezer and VT ✅👺


DLL loaded from Encoded PS Script spawned from the MSI suspect file☣️👨‍🔬
6 months later and Intezer still lists the file as trusted! Wow
 

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