General

  • Target

    CritScript.exe

  • Size

    3.2MB

  • Sample

    241213-l19zdavlax

  • MD5

    c28dc010fc5198442496bc07dd50cd5d

  • SHA1

    0f90a005815c2700a65ea85ae86f13a182cc11e6

  • SHA256

    1b701daded4124260a49040d83dec15c627b8e4a1a04dc378aae7fecfca3abf3

  • SHA512

    7c94bafa48db045a864a778a010a7d1d03204828bd103a86c1267732a51260b0e689a799cc7e95410ceedd1254fb91aa3f19f62efa3e41e40be645862a4e07e2

  • SSDEEP

    49152:IuvyI22SsaNYfdPBldt698dBcjH7BhSR1J/xoGdoTHHB72eh2NT:Iuvf22SsaNYfdPBldt6+dBcjH7BhSb

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

DDNS

C2

193.161.193.99:32471

Mutex

807f3187-d087-4fff-beff-e73293a32af8

Attributes
  • encryption_key

    81A0C14D4C705B3C678E573C849DE7F6A3671A8B

  • install_name

    jusched.exe

  • log_directory

    CachedLogs

  • reconnect_delay

    3000

  • startup_key

    Java Update Scheduler

  • subdirectory

    Java

Targets

    • Target

      CritScript.exe

    • Size

      3.2MB

    • MD5

      c28dc010fc5198442496bc07dd50cd5d

    • SHA1

      0f90a005815c2700a65ea85ae86f13a182cc11e6

    • SHA256

      1b701daded4124260a49040d83dec15c627b8e4a1a04dc378aae7fecfca3abf3

    • SHA512

      7c94bafa48db045a864a778a010a7d1d03204828bd103a86c1267732a51260b0e689a799cc7e95410ceedd1254fb91aa3f19f62efa3e41e40be645862a4e07e2

    • SSDEEP

      49152:IuvyI22SsaNYfdPBldt698dBcjH7BhSR1J/xoGdoTHHB72eh2NT:Iuvf22SsaNYfdPBldt6+dBcjH7BhSb

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

MITRE ATT&CK Enterprise v15

Tasks