General
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Target
Windows11InstallationAssistant.exe
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Size
4.0MB
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Sample
250113-x9me8avmfs
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MD5
73c8041e8b532d9791ef3987f82d73c2
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SHA1
0ad458c01db820fa808d41d38e282cf962806910
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SHA256
188698d10b1f7b9710061ec95e0aec55a0cb2239e622fa4f7fdd5d360d00a007
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SHA512
a5402ec7871867d579d1a9c8142ebce31c23153ec4395e746474e524531dd58781a0644cccd869333c044a41e61fef48e118f4ed46860bc8cb7b90fc60925304
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SSDEEP
98304:HgqIctyETh4cCpI0kwJF4vY5SK63dzBEZht5f/LyXtcH/AU:Aqtyih9Cawjr/6NAjyXa
Static task
static1
Behavioral task
behavioral1
Sample
Windows11InstallationAssistant.exe
Resource
win10v2004-20241007-en
Malware Config
Targets
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Target
Windows11InstallationAssistant.exe
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Size
4.0MB
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MD5
73c8041e8b532d9791ef3987f82d73c2
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SHA1
0ad458c01db820fa808d41d38e282cf962806910
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SHA256
188698d10b1f7b9710061ec95e0aec55a0cb2239e622fa4f7fdd5d360d00a007
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SHA512
a5402ec7871867d579d1a9c8142ebce31c23153ec4395e746474e524531dd58781a0644cccd869333c044a41e61fef48e118f4ed46860bc8cb7b90fc60925304
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SSDEEP
98304:HgqIctyETh4cCpI0kwJF4vY5SK63dzBEZht5f/LyXtcH/AU:Aqtyih9Cawjr/6NAjyXa
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Dharma
Dharma is a ransomware that uses security software installation to hide malicious activities.
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Dharma family
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Deletes shadow copies
Ransomware often targets backup files to inhibit system recovery.
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Renames multiple (132) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Downloads MZ/PE file
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Credentials from Password Stores: Windows Credential Manager
Suspicious access to Credentials History.
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Drops startup file
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Executes dropped EXE
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Loads dropped DLL
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Adds Run key to start application
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Drops desktop.ini file(s)
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Legitimate hosting services abused for malware hosting/C2
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Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
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AutoIT Executable
AutoIT scripts compiled to PE executables.
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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Direct Volume Access
1Indicator Removal
2File Deletion
2Modify Registry
2Pre-OS Boot
1Bootkit
1Credential Access
Credentials from Password Stores
2Credentials from Web Browsers
1Windows Credential Manager
1Unsecured Credentials
1Credentials In Files
1