General
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Target
2024-05-23_545f852cc1f52d76fad52a4f410ba432_virlock
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Size
915KB
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Sample
240523-xxvaasda97
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MD5
545f852cc1f52d76fad52a4f410ba432
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SHA1
6857449eb58747a188f2b12eeb59655d837df93c
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SHA256
d39d75fbb6833ccf7c7713b42c85dc9cb8b36c1a3ea8d76514b2431c12a4ddbe
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SHA512
d1b607b8007d8b77912ca05a95b6bc50e9d2be1e6c4e17b15fd34ad43492af44d1d39763bd4cceca485d592a915892e9a0a2ef8fc2d0b1cb8a63f20e0f843807
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SSDEEP
12288:ObI8Ciz3ku6SuS2CDgb/zg2XKdVV8GKLJ7Tld6HG/uFxzVlk8ihBhUsKbicv/m+3:pOLkusS2CDM6/V+VGqufpjO01o1eC0
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-23_545f852cc1f52d76fad52a4f410ba432_virlock.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-23_545f852cc1f52d76fad52a4f410ba432_virlock.exe
Resource
win10v2004-20240426-en
Malware Config
Targets
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Target
2024-05-23_545f852cc1f52d76fad52a4f410ba432_virlock
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Size
915KB
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MD5
545f852cc1f52d76fad52a4f410ba432
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SHA1
6857449eb58747a188f2b12eeb59655d837df93c
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SHA256
d39d75fbb6833ccf7c7713b42c85dc9cb8b36c1a3ea8d76514b2431c12a4ddbe
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SHA512
d1b607b8007d8b77912ca05a95b6bc50e9d2be1e6c4e17b15fd34ad43492af44d1d39763bd4cceca485d592a915892e9a0a2ef8fc2d0b1cb8a63f20e0f843807
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SSDEEP
12288:ObI8Ciz3ku6SuS2CDgb/zg2XKdVV8GKLJ7Tld6HG/uFxzVlk8ihBhUsKbicv/m+3:pOLkusS2CDM6/V+VGqufpjO01o1eC0
Score10/10-
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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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 Matrix ATT&CK v13
Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1