General
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Target
2024-04-03_c1aeba6369a3615061f44778021f6b42_virlock
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Size
163KB
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Sample
240403-ntvxzsdb32
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MD5
c1aeba6369a3615061f44778021f6b42
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SHA1
d5e40b2f91be6e95891a6f3e111f6a00f448de27
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SHA256
357908d9f3abf01fcc8d4d3527483d5b9993cd1f70d7af2897ed313f05a39d97
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SHA512
9e4bb49a5230ad624b9224b1f17e4da18345a9c7fece9299035986fc453b7f61c83d2a72486a8f7b674a14575107cf6d661f28709f9aef0450199c2cc3b8edd3
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SSDEEP
3072:YHgTPOOwUJRymLMT+2eVyY1+ly6MkCSU2jgPqS01LpTLAwqsonnqBKLtYMlDJ+:YHgCfn7js6Zjg+Qfe0
Behavioral task
behavioral1
Sample
2024-04-03_c1aeba6369a3615061f44778021f6b42_virlock.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-03_c1aeba6369a3615061f44778021f6b42_virlock.exe
Resource
win10v2004-20240226-en
Malware Config
Targets
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Target
2024-04-03_c1aeba6369a3615061f44778021f6b42_virlock
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Size
163KB
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MD5
c1aeba6369a3615061f44778021f6b42
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SHA1
d5e40b2f91be6e95891a6f3e111f6a00f448de27
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SHA256
357908d9f3abf01fcc8d4d3527483d5b9993cd1f70d7af2897ed313f05a39d97
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SHA512
9e4bb49a5230ad624b9224b1f17e4da18345a9c7fece9299035986fc453b7f61c83d2a72486a8f7b674a14575107cf6d661f28709f9aef0450199c2cc3b8edd3
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SSDEEP
3072:YHgTPOOwUJRymLMT+2eVyY1+ly6MkCSU2jgPqS01LpTLAwqsonnqBKLtYMlDJ+:YHgCfn7js6Zjg+Qfe0
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Modifies visibility of file extensions in Explorer
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Renames multiple (71) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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UPX dump on OEP (original entry point)
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Deletes itself
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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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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1