General
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Target
https://github.com/SparkScratch-P/batch-virus/blob/main/viruses/virus27.bat
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Sample
240222-yqhhlaee7v
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://github.com/SparkScratch-P/batch-virus/blob/main/viruses/virus27.bat
Resource
win10v2004-20240221-en
Malware Config
Extracted
crimsonrat
185.136.161.124
Targets
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Target
https://github.com/SparkScratch-P/batch-virus/blob/main/viruses/virus27.bat
Score10/10-
CrimsonRAT main payload
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Modifies WinLogon for persistence
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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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Executes dropped EXE
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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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Legitimate hosting services abused for malware hosting/C2
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1