General

  • Target

    bfaa90c6e3aacd9d9b83a4f8f0f74b0a

  • Size

    534KB

  • Sample

    220718-ngltjsdaan

  • MD5

    bfaa90c6e3aacd9d9b83a4f8f0f74b0a

  • SHA1

    85cc249e2cbf60761fb6de586a442bfc81052e36

  • SHA256

    6d00a6b8d581813e8af3114968274f89978b40d400c8eef2bf7e09192f5ec9e6

  • SHA512

    29d83e5f0e82f94c75874c382dc0c002ed90627b8441066c2dc2575ec1f6aff3973bc72915b767d5e54688da6043a3bcd294d26445d865462a11ddb88f0912a5

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

127.0.0.1:4782

Mutex

VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes
  • encryption_key

    NTih4UsOfv91J9azm70k

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      bfaa90c6e3aacd9d9b83a4f8f0f74b0a

    • Size

      534KB

    • MD5

      bfaa90c6e3aacd9d9b83a4f8f0f74b0a

    • SHA1

      85cc249e2cbf60761fb6de586a442bfc81052e36

    • SHA256

      6d00a6b8d581813e8af3114968274f89978b40d400c8eef2bf7e09192f5ec9e6

    • SHA512

      29d83e5f0e82f94c75874c382dc0c002ed90627b8441066c2dc2575ec1f6aff3973bc72915b767d5e54688da6043a3bcd294d26445d865462a11ddb88f0912a5

    • 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 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.

    • suricata: ET MALWARE Common RAT Connectivity Check Observed

      suricata: ET MALWARE Common RAT Connectivity Check Observed

    • suricata: ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 2

      suricata: ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 2

    • suricata: ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 3

      suricata: ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 3

    • Looks up external IP address via web service

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

MITRE ATT&CK Matrix

Tasks