General

  • Target

    JaffaCakes118_389a769c402b70d8df882c6ef68f25b2

  • Size

    825KB

  • Sample

    250301-m2qskazly5

  • MD5

    389a769c402b70d8df882c6ef68f25b2

  • SHA1

    eee96b686ab923043355353cfb99b7364ae45efb

  • SHA256

    3e82726be4298544db69160ced09199c81dad606c3bb5d098bcf510041eb2c42

  • SHA512

    2ee875367bfa3425c517af12d283c2ae7920f1fda44c3821279a99185c8b5df2ad3242b760c9a5cba85eeaa13074be55951a29ffbddb64ac583272e871cd5010

  • SSDEEP

    24576:y0ytO3rUVidlntbUnz6Wb9IhsO6XCQ68:YKVrlUnzD9IhPJQ6

Malware Config

Extracted

Family

darkcomet

Attributes
  • gencode

  • install

    false

  • offline_keylogger

    false

  • persistence

    false

rc4.plain

Extracted

Family

darkcomet

Botnet

Guest16

C2

killergkhn.no-ip.biz:3460

Mutex

DC_MUTEX-9GX4KY8

Attributes
  • InstallPath

    Windowsupdate\winupdate.exe

  • gencode

    17r%FyvQ/-Ze

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    winupdater

rc4.plain

Targets

    • Target

      JaffaCakes118_389a769c402b70d8df882c6ef68f25b2

    • Size

      825KB

    • MD5

      389a769c402b70d8df882c6ef68f25b2

    • SHA1

      eee96b686ab923043355353cfb99b7364ae45efb

    • SHA256

      3e82726be4298544db69160ced09199c81dad606c3bb5d098bcf510041eb2c42

    • SHA512

      2ee875367bfa3425c517af12d283c2ae7920f1fda44c3821279a99185c8b5df2ad3242b760c9a5cba85eeaa13074be55951a29ffbddb64ac583272e871cd5010

    • SSDEEP

      24576:y0ytO3rUVidlntbUnz6Wb9IhsO6XCQ68:YKVrlUnzD9IhPJQ6

    • Darkcomet

      DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

    • Darkcomet family

    • Modifies WinLogon for persistence

    • Windows security bypass

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Windows security modification

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks