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<blockquote data-quote="Andy Ful" data-source="post: 977598" data-attributes="member: 32260"><p><span style="font-size: 18px"><strong>SWH vs. Asylum Ambuscade spear-phishing campaign</strong></span></p><p><span style="font-size: 15px">[URL unfurl="true"]https://www.proofpoint.com/us/blog/threat-insight/asylum-ambuscade-state-actor-uses-compromised-private-ukrainian-military-emails[/URL]</span></p><p></p><p><span style="color: rgb(184, 49, 47)"><span style="font-size: 15px"><strong>Infection chain:</strong></span></span></p><p></p><p><span style="font-size: 15px">[ATTACH=full]264722[/ATTACH]</span></p><p>Nothing especially new for SWH. The VB macro (VBA macro) cannot run because SWH in Recommended Settings disables all VBA features in MS Office (in version 2.0.0.0 this is done via the DocumentsAntiExploit tool).</p><p></p><p>If the user would not use DocumentsAntiExploit hardening and would allow running the macro, then the malware could infect the computer. </p><p></p><p><strong>How H_C_Hardening tools could prevent this attack?</strong></p><ul> <li data-xf-list-type="ul">ConfigureDefender HIGH - MSI installation will be blocked by the ASR rule "Block Office applications from creating child processes".</li> <li data-xf-list-type="ul">FirewallHardening - Msiexec LOLBin will be prevented to download the MSI payload.</li> <li data-xf-list-type="ul">DocumentsAntiExploit tool - the initial macro will be blocked without notification.</li> </ul><p>Post Edited.</p><p>I tested the macro used in the attack. It uses the COM object WindowsInstaller.Installer which triggers Msiexec LOLBin. So, the Msiexec LOLBin will try to download the MSI payload (and not the Excel application). Msiexec LOLBin connections are blocked by FirewallHardening (Recommended H_C preset).</p><p>Here is the event from the FirewallHardening Log after running the macro:</p><p></p><p></p><p><strong><span style="color: rgb(0, 168, 133)">Post updated to reflect the changes in SWH ver. 2.0.0.0 and later.</span></strong></p><p></p><p>Edit.</p><p>SWH does not block shortcuts in the User Startup folder (H_C can do it).</p></blockquote><p></p>
[QUOTE="Andy Ful, post: 977598, member: 32260"] [SIZE=5][B]SWH vs. Asylum Ambuscade spear-phishing campaign[/B][/SIZE] [SIZE=4][URL unfurl="true"]https://www.proofpoint.com/us/blog/threat-insight/asylum-ambuscade-state-actor-uses-compromised-private-ukrainian-military-emails[/URL][/SIZE] [COLOR=rgb(184, 49, 47)][SIZE=4][B]Infection chain:[/B][/SIZE][/COLOR] [SIZE=4][ATTACH type="full" alt="1646300531401.png"]264722[/ATTACH][/SIZE] Nothing especially new for SWH. The VB macro (VBA macro) cannot run because SWH in Recommended Settings disables all VBA features in MS Office (in version 2.0.0.0 this is done via the DocumentsAntiExploit tool). If the user would not use DocumentsAntiExploit hardening and would allow running the macro, then the malware could infect the computer. [B]How H_C_Hardening tools could prevent this attack?[/B] [LIST] [*]ConfigureDefender HIGH - MSI installation will be blocked by the ASR rule "Block Office applications from creating child processes". [*]FirewallHardening - Msiexec LOLBin will be prevented to download the MSI payload. [*]DocumentsAntiExploit tool - the initial macro will be blocked without notification. [/LIST] Post Edited. I tested the macro used in the attack. It uses the COM object WindowsInstaller.Installer which triggers Msiexec LOLBin. So, the Msiexec LOLBin will try to download the MSI payload (and not the Excel application). Msiexec LOLBin connections are blocked by FirewallHardening (Recommended H_C preset). Here is the event from the FirewallHardening Log after running the macro: [B][COLOR=rgb(0, 168, 133)]Post updated to reflect the changes in SWH ver. 2.0.0.0 and later.[/COLOR][/B] Edit. SWH does not block shortcuts in the User Startup folder (H_C can do it). [/QUOTE]
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