General
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Target
2024-04-03_abac5eabd200797739a3103b2f2d6655_virlock
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Size
149KB
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Sample
240403-nstnjada98
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MD5
abac5eabd200797739a3103b2f2d6655
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SHA1
4a2cd5715a93c82e71af0494d80690b51a8d1edb
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SHA256
0a948418020958101baed862d3f0f1d1db28567cc58a8b0b9a40d689aeb15e8f
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SHA512
218b9f502e315bde2806f4f1cc303652c1105669322a39a9f533426022bdf46d7b08e5102a71f1b0b1d8ed52ceb966458574d186939b378426ef14d81eff8c07
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SSDEEP
3072:JR2x2NfpfMeMyfWhPKnuXd/i3MJ9CLLBuWpMQQf2pcofer9mvK+:rKuo9hK8S3npT7Rfsmy
Behavioral task
behavioral1
Sample
2024-04-03_abac5eabd200797739a3103b2f2d6655_virlock.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-03_abac5eabd200797739a3103b2f2d6655_virlock.exe
Resource
win10v2004-20240226-en
Malware Config
Targets
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Target
2024-04-03_abac5eabd200797739a3103b2f2d6655_virlock
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Size
149KB
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MD5
abac5eabd200797739a3103b2f2d6655
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SHA1
4a2cd5715a93c82e71af0494d80690b51a8d1edb
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SHA256
0a948418020958101baed862d3f0f1d1db28567cc58a8b0b9a40d689aeb15e8f
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SHA512
218b9f502e315bde2806f4f1cc303652c1105669322a39a9f533426022bdf46d7b08e5102a71f1b0b1d8ed52ceb966458574d186939b378426ef14d81eff8c07
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SSDEEP
3072:JR2x2NfpfMeMyfWhPKnuXd/i3MJ9CLLBuWpMQQf2pcofer9mvK+:rKuo9hK8S3npT7Rfsmy
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Modifies visibility of file extensions in Explorer
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Renames multiple (87) 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