General

  • Target

    d76aafee2e54939467b8375394c17f0f99e1dd8497fe2e9a91ff61c4b2d6c8dc

  • Size

    655KB

  • Sample

    221130-wan94aec9v

  • MD5

    c6b8dff8c0e4204c318dc7e349d5f531

  • SHA1

    af9f8e6bacac7bd9c2b59c80d4448f0abc10b3c3

  • SHA256

    d76aafee2e54939467b8375394c17f0f99e1dd8497fe2e9a91ff61c4b2d6c8dc

  • SHA512

    6d81e1b0b22452fab716d4e7baa8d05cec02e7a4a3d4a8460504bd7075b23645c2344576f9b0364eef9cfbce64a53d5c12266d9d7f8ab3a0c9e03fdd39d09d8f

  • SSDEEP

    12288:QNlD5ZS/1WEJOAqRSEM3Sy21LVbK89elrrJ56m:QKIDAEQSy2TbKuKN

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

ajith

C2

23.105.131.178:7812

Mutex

VNM_MUTEX_NdVd2sPSSqFdo7I35g

Attributes
  • encryption_key

    jyerms3KOWmt3C9DBFuq

  • install_name

    Windows Defender Security.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Update

  • subdirectory

    SubDir

Targets

    • Target

      d76aafee2e54939467b8375394c17f0f99e1dd8497fe2e9a91ff61c4b2d6c8dc

    • Size

      655KB

    • MD5

      c6b8dff8c0e4204c318dc7e349d5f531

    • SHA1

      af9f8e6bacac7bd9c2b59c80d4448f0abc10b3c3

    • SHA256

      d76aafee2e54939467b8375394c17f0f99e1dd8497fe2e9a91ff61c4b2d6c8dc

    • SHA512

      6d81e1b0b22452fab716d4e7baa8d05cec02e7a4a3d4a8460504bd7075b23645c2344576f9b0364eef9cfbce64a53d5c12266d9d7f8ab3a0c9e03fdd39d09d8f

    • SSDEEP

      12288:QNlD5ZS/1WEJOAqRSEM3Sy21LVbK89elrrJ56m:QKIDAEQSy2TbKuKN

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • Modifies Windows Defender Real-time Protection settings

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • VenomRAT

      VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.

    • Executes dropped EXE

    • Checks computer location settings

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

    • Loads dropped DLL

    • Windows security modification

    • Adds Run key to start application

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks