General

  • Target

    77d715446ad952471a2a93e3f04f51a002086e90b5fd80f74e59acbbd4a9faa1

  • Size

    724KB

  • Sample

    220327-dj3jzaghbn

  • MD5

    e6a103fe244837f1d9b3aef62ac0d29f

  • SHA1

    b14829bd20c77dcf84edea4625d7320897983e20

  • SHA256

    77d715446ad952471a2a93e3f04f51a002086e90b5fd80f74e59acbbd4a9faa1

  • SHA512

    9d04008c4c5fc4994b1f42a6e5e03473e941215ea62f47cae321202f078dd5e3b1ce914549cab090b372e03db62d8399f621695e219f592094e27d7613009bed

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

0.tcp.ngrok.io:13005

Mutex

VNM_MUTEX_ljpH86m9yQvMdFiQrM

Attributes
  • encryption_key

    7gt3Jirz0rwSn4uB1QfR

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      77d715446ad952471a2a93e3f04f51a002086e90b5fd80f74e59acbbd4a9faa1

    • Size

      724KB

    • MD5

      e6a103fe244837f1d9b3aef62ac0d29f

    • SHA1

      b14829bd20c77dcf84edea4625d7320897983e20

    • SHA256

      77d715446ad952471a2a93e3f04f51a002086e90b5fd80f74e59acbbd4a9faa1

    • SHA512

      9d04008c4c5fc4994b1f42a6e5e03473e941215ea62f47cae321202f078dd5e3b1ce914549cab090b372e03db62d8399f621695e219f592094e27d7613009bed

    • Contains code to disable Windows Defender

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

    • Quasar Payload

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • VenomRAT

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

    • 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 Matrix

Tasks