General
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Target
smss.exe
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Size
9.2MB
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Sample
240426-q6fpyadf4t
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MD5
53b92442e012db2fc2ee7dc22ee932a9
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SHA1
750d3f0ac227ccaa2c2a86859cffa4a2ac7cb1d1
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SHA256
776217117d4b2ecdb07b8a182581e4fd562c0a5785340f86100cf5c1b4eff62e
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SHA512
b64301d65f48f76855ad89723a933f6e25478ae3a5bcc35cbef81badd08d6dc565d41b51b46a9ab1ad750f0dfa81bffc3c4e6b3b5708f49fd937c948d674c430
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SSDEEP
196608:uDL2f4ARa+Yw//FpKv45ZhxE5ckWxoUPTYC39SGVy32idMfeaq6p:2L2f4ARaat64fhuWxjBE2SMfeaq6p
Malware Config
Targets
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Target
smss.exe
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Size
9.2MB
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MD5
53b92442e012db2fc2ee7dc22ee932a9
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SHA1
750d3f0ac227ccaa2c2a86859cffa4a2ac7cb1d1
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SHA256
776217117d4b2ecdb07b8a182581e4fd562c0a5785340f86100cf5c1b4eff62e
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SHA512
b64301d65f48f76855ad89723a933f6e25478ae3a5bcc35cbef81badd08d6dc565d41b51b46a9ab1ad750f0dfa81bffc3c4e6b3b5708f49fd937c948d674c430
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SSDEEP
196608:uDL2f4ARa+Yw//FpKv45ZhxE5ckWxoUPTYC39SGVy32idMfeaq6p:2L2f4ARaat64fhuWxjBE2SMfeaq6p
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Grants admin privileges
Uses net.exe to modify the user's privileges.
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Identifies VirtualBox via ACPI registry values (likely anti-VM)
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Downloads MZ/PE file
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Modifies Windows Firewall
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Sets DLL path for service in the registry
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE
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Loads dropped DLL
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Legitimate hosting services abused for malware hosting/C2
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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Modifies WinLogon
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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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Suspicious use of NtSetInformationThreadHideFromDebugger
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MITRE ATT&CK Enterprise v15
Persistence
Account Manipulation
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1Privilege Escalation
Account Manipulation
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
1Windows Service
1Scheduled Task/Job
1Defense Evasion
Impair Defenses
1Disable or Modify System Firewall
1Modify Registry
2Virtualization/Sandbox Evasion
1