General

  • Target

    clrjit_dump.dll

  • Size

    548KB

  • Sample

    230131-f76bwagd7z

  • MD5

    bb3c1b827cba1a09c708610c564be8ec

  • SHA1

    ce850503d10d2710dbe25850a804e713b7373cae

  • SHA256

    7c294284e335b093fedec96c754d4b2630bffa9cabe4596cbc0d8d3ff3727660

  • SHA512

    393fb7a9dd03725670fe1285de765f9aaca19c10459ecc6aca75baa0c79b5c44d2a5dab8edbb07ba0ee1352fae438e7c9fb3522d6783601709c2b9cc38a8a50c

  • SSDEEP

    12288:rlk72WGvN7z5DxbOhRF+61+QfcfhwTHCWcX/WtpF:raGvN7z5DxbURFH1vfcfhXVXUF

Malware Config

Targets

    • Target

      clrjit_dump.dll

    • Size

      548KB

    • MD5

      bb3c1b827cba1a09c708610c564be8ec

    • SHA1

      ce850503d10d2710dbe25850a804e713b7373cae

    • SHA256

      7c294284e335b093fedec96c754d4b2630bffa9cabe4596cbc0d8d3ff3727660

    • SHA512

      393fb7a9dd03725670fe1285de765f9aaca19c10459ecc6aca75baa0c79b5c44d2a5dab8edbb07ba0ee1352fae438e7c9fb3522d6783601709c2b9cc38a8a50c

    • SSDEEP

      12288:rlk72WGvN7z5DxbOhRF+61+QfcfhwTHCWcX/WtpF:raGvN7z5DxbURFH1vfcfhXVXUF

    • Executes dropped EXE

    • Checks computer location settings

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

    • Loads dropped DLL

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Detected potential entity reuse from brand microsoft.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

5
T1012

System Information Discovery

5
T1082

Peripheral Device Discovery

2
T1120

Tasks