General
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Target
2024-04-03_d6e0ac2dad377548df7a1bc100552f83_virlock
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Size
164KB
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Sample
240403-nvp35acf61
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MD5
d6e0ac2dad377548df7a1bc100552f83
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SHA1
abf37bb9d34e27907c1caf2f32a4fa74a839fb75
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SHA256
4b55af0b4dc465f8602b815562f7ee3373eae6a4d8e840ffa3f3d5ebdc4cd57e
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SHA512
07cfb1ec1784ff21498aa3144139236d9afac2c6f1ae3443bf2a329d194e5b9dcd0dd840247a0425c7c2f3553cad58173c436013f5b4fcb383702fd4cc3516d5
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SSDEEP
3072:/WjS5wmhTYXuQ+jsWQvhZ4aSqziwPhR2TdUyhY/H4sjDf8oyQZiLeBcxuyQ2pu0n:/u78YXuQ+UfdjsY/YsjDf8TQPSK2k0e4
Behavioral task
behavioral1
Sample
2024-04-03_d6e0ac2dad377548df7a1bc100552f83_virlock.exe
Resource
win7-20240319-en
Behavioral task
behavioral2
Sample
2024-04-03_d6e0ac2dad377548df7a1bc100552f83_virlock.exe
Resource
win10v2004-20240226-en
Malware Config
Targets
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Target
2024-04-03_d6e0ac2dad377548df7a1bc100552f83_virlock
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Size
164KB
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MD5
d6e0ac2dad377548df7a1bc100552f83
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SHA1
abf37bb9d34e27907c1caf2f32a4fa74a839fb75
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SHA256
4b55af0b4dc465f8602b815562f7ee3373eae6a4d8e840ffa3f3d5ebdc4cd57e
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SHA512
07cfb1ec1784ff21498aa3144139236d9afac2c6f1ae3443bf2a329d194e5b9dcd0dd840247a0425c7c2f3553cad58173c436013f5b4fcb383702fd4cc3516d5
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SSDEEP
3072:/WjS5wmhTYXuQ+jsWQvhZ4aSqziwPhR2TdUyhY/H4sjDf8oyQZiLeBcxuyQ2pu0n:/u78YXuQ+UfdjsY/YsjDf8TQPSK2k0e4
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Modifies visibility of file extensions in Explorer
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Renames multiple (79) 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