General
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Target
microsoft-teams-24231.512.3106.6573-installer_9-VhmF1.exe
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Size
1.7MB
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Sample
240921-akt3fawcmb
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MD5
dad2ff08424cca6f90d768d8f2edadb0
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SHA1
a7f7acd7fc5c627043e1a735059b744d1991f566
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SHA256
a619aca857a8f1bfcd2e64685354943cb9c415e7b70507307cc93df4654f4077
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SHA512
23c169c99e04800109e10fbbc89683b5b09d57f641b1b0b074c81c57560c85b7ef30b938e6effc73de5540ce40df7919283a1b9e8c3f73c1c62a6f1b0052414f
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SSDEEP
24576:y7FUDowAyrTVE3U5F/2LuHhCLW1cercfgKflOF6OE1L2bOI9zox2vzL:yBuZrEU5LcNOEj1JItoSzL
Static task
static1
Behavioral task
behavioral1
Sample
microsoft-teams-24231.512.3106.6573-installer_9-VhmF1.exe
Resource
win10-20240404-en
Behavioral task
behavioral2
Sample
microsoft-teams-24231.512.3106.6573-installer_9-VhmF1.exe
Resource
win10v2004-20240802-en
Malware Config
Targets
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Target
microsoft-teams-24231.512.3106.6573-installer_9-VhmF1.exe
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Size
1.7MB
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MD5
dad2ff08424cca6f90d768d8f2edadb0
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SHA1
a7f7acd7fc5c627043e1a735059b744d1991f566
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SHA256
a619aca857a8f1bfcd2e64685354943cb9c415e7b70507307cc93df4654f4077
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SHA512
23c169c99e04800109e10fbbc89683b5b09d57f641b1b0b074c81c57560c85b7ef30b938e6effc73de5540ce40df7919283a1b9e8c3f73c1c62a6f1b0052414f
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SSDEEP
24576:y7FUDowAyrTVE3U5F/2LuHhCLW1cercfgKflOF6OE1L2bOI9zox2vzL:yBuZrEU5LcNOEj1JItoSzL
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Cobalt Strike reflective loader
Detects the reflective loader used by Cobalt Strike.
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Contains code to disable Windows Defender
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
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Drops file in Drivers directory
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Adds Run key to start application
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Downloads MZ/PE file
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Modifies powershell logging option
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AutoIT Executable
AutoIT scripts compiled to PE executables.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Drops file in System32 directory
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Event Triggered Execution: Component Object Model Hijacking
Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event Triggered Execution
1Component Object Model Hijacking
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event Triggered Execution
1Component Object Model Hijacking
1Defense Evasion
Modify Registry
3Subvert Trust Controls
1Install Root Certificate
1