General

  • Target

    2024-06-12_e9dd937a1e45c18df0e7076d7c368801_virlock

  • Size

    121KB

  • Sample

    240612-23b35avakb

  • MD5

    e9dd937a1e45c18df0e7076d7c368801

  • SHA1

    5e43f2e32d94b4c4a560b90e5c9b5368e14fa750

  • SHA256

    3d08c8f5ea07b82a7d16ec8d681215b94b4574f4a434279bfa5ea64c19af2842

  • SHA512

    a99b72549b4dd5a6f3fe34c6400db2ff794c4bf2eeb7c776f5140bbc3a58989c02d27bbaaa9fe3d19fb6d7e6b585ed581f2877006fadb42e9d74fc969a399a40

  • SSDEEP

    1536:4FscAhHjx0LBZMCaWTXGTPIoCGlhxNwaK1CQ3GNE5VbrYnMUg/adOJgxxC:4yfDC2EoNwaO514xZdOJgnC

Malware Config

Targets

    • Target

      2024-06-12_e9dd937a1e45c18df0e7076d7c368801_virlock

    • Size

      121KB

    • MD5

      e9dd937a1e45c18df0e7076d7c368801

    • SHA1

      5e43f2e32d94b4c4a560b90e5c9b5368e14fa750

    • SHA256

      3d08c8f5ea07b82a7d16ec8d681215b94b4574f4a434279bfa5ea64c19af2842

    • SHA512

      a99b72549b4dd5a6f3fe34c6400db2ff794c4bf2eeb7c776f5140bbc3a58989c02d27bbaaa9fe3d19fb6d7e6b585ed581f2877006fadb42e9d74fc969a399a40

    • SSDEEP

      1536:4FscAhHjx0LBZMCaWTXGTPIoCGlhxNwaK1CQ3GNE5VbrYnMUg/adOJgxxC:4yfDC2EoNwaO514xZdOJgnC

    • Modifies visibility of file extensions in Explorer

    • UAC bypass

    • Renames multiple (80) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Adds Run key to start application

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Modify Registry

4
T1112

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Tasks