General
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Target
2025-05-29_55c56a97f196e69dda6d1e76faad933e_elex_virlock
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Size
643KB
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Sample
250529-3gvh1szwdv
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MD5
55c56a97f196e69dda6d1e76faad933e
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SHA1
f3d76db0ba51852bc4a0a4ba9056e7b70c30488e
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SHA256
f07dccafc3ce30c37ce01efc74d7abb932ffff1fd70452325260267cb51d11e4
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SHA512
75774352bb8f0d6346d627b3df1aed622e7fbb21c54d3004e6a70fb5986954f667da8f3cffb54ccc80e5b547850901d2c797abc2d30d363e9cccc177f05175bb
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SSDEEP
12288:GRW97Y96i3ysUHvna+lMsV2sOIu9RdN2VBahvlrpJRQ1dDdaJ1oNpN:GSsUH5lMAY9RdMBsPo
Static task
static1
Behavioral task
behavioral1
Sample
2025-05-29_55c56a97f196e69dda6d1e76faad933e_elex_virlock.exe
Resource
win10v2004-20250502-en
Behavioral task
behavioral2
Sample
2025-05-29_55c56a97f196e69dda6d1e76faad933e_elex_virlock.exe
Resource
win11-20250502-en
Malware Config
Targets
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Target
2025-05-29_55c56a97f196e69dda6d1e76faad933e_elex_virlock
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Size
643KB
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MD5
55c56a97f196e69dda6d1e76faad933e
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SHA1
f3d76db0ba51852bc4a0a4ba9056e7b70c30488e
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SHA256
f07dccafc3ce30c37ce01efc74d7abb932ffff1fd70452325260267cb51d11e4
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SHA512
75774352bb8f0d6346d627b3df1aed622e7fbb21c54d3004e6a70fb5986954f667da8f3cffb54ccc80e5b547850901d2c797abc2d30d363e9cccc177f05175bb
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SSDEEP
12288:GRW97Y96i3ysUHvna+lMsV2sOIu9RdN2VBahvlrpJRQ1dDdaJ1oNpN:GSsUH5lMAY9RdMBsPo
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Modifies visibility of file extensions in Explorer
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UAC bypass
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Renames multiple (85) 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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Adds Run key to start application
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Drops file in System32 directory
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MITRE ATT&CK Enterprise v16
Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Hide Artifacts
1Hidden Files and Directories
1Impair Defenses
1Disable or Modify Tools
1Modify Registry
4Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1