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General
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Target
2024-10-16_2b1f1671c20470163d5e6172dfc87b8e_virlock
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Size
764KB
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Sample
241016-ghenasvhqb
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MD5
2b1f1671c20470163d5e6172dfc87b8e
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SHA1
54a722115724d97ad36fbb2475ae64885e81341a
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SHA256
efb73d5c947959641d60731c17e2abdf0a677483073021532b5453de401c8bc2
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SHA512
d5148f3fd472d7b1aae05fd05de4dfd02a6498c7f7bd9befc89327f489d14f41d34a3874b2c1f70858b2c9dfbe3a2863fa3b3051a56d68a25ff864a9e029f5f3
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SSDEEP
12288:z0FRH0SL68Sh6gvdWuF7cWhBDQkvVZiQ/FkYKt+DVI78+IbR2:E9XL686WuFAWhBVVgQNByU88+IY
Static task
static1
Behavioral task
behavioral1
Sample
2024-10-16_2b1f1671c20470163d5e6172dfc87b8e_virlock.exe
Resource
win7-20240903-en
Malware Config
Targets
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Target
2024-10-16_2b1f1671c20470163d5e6172dfc87b8e_virlock
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Size
764KB
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MD5
2b1f1671c20470163d5e6172dfc87b8e
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SHA1
54a722115724d97ad36fbb2475ae64885e81341a
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SHA256
efb73d5c947959641d60731c17e2abdf0a677483073021532b5453de401c8bc2
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SHA512
d5148f3fd472d7b1aae05fd05de4dfd02a6498c7f7bd9befc89327f489d14f41d34a3874b2c1f70858b2c9dfbe3a2863fa3b3051a56d68a25ff864a9e029f5f3
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SSDEEP
12288:z0FRH0SL68Sh6gvdWuF7cWhBDQkvVZiQ/FkYKt+DVI78+IbR2:E9XL686WuFAWhBVVgQNByU88+IY
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Modifies WinLogon for persistence
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Modifies visibility of file extensions in Explorer
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Renames multiple (65) 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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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
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Hide Artifacts
1Hidden Files and Directories
1Impair Defenses
1Disable or Modify Tools
1Modify Registry
5Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1