General

  • Target

    472b8091593a2fef317573e75d7bd424ba67b164c0aaaa06c26de6b15d19bb04

  • Size

    962KB

  • Sample

    220501-3cvcfsahdj

  • MD5

    2d8a7a711bf1308a13f02f36ad88bf3b

  • SHA1

    df45338383fda3fdc745c9564b76ebd84aaffe19

  • SHA256

    472b8091593a2fef317573e75d7bd424ba67b164c0aaaa06c26de6b15d19bb04

  • SHA512

    1cc23482ce5a3ae33713c1aebb6ef503d211512934d12b873ba86d140f9d042dbbd1544aa399b5fefa5a371e24209a21f5994146d7cda9c5ffc63c4b0005b74a

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

codexm0106.ddns.net:1177

Mutex

VNM_MUTEX_Xnd6D5iIpqWwMJAqx5

Attributes
  • encryption_key

    iN4UZnXEraSZhG0zbaFO

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    2000

  • startup_key

    windows startup

  • subdirectory

    SubDir

Targets

    • Target

      472b8091593a2fef317573e75d7bd424ba67b164c0aaaa06c26de6b15d19bb04

    • Size

      962KB

    • MD5

      2d8a7a711bf1308a13f02f36ad88bf3b

    • SHA1

      df45338383fda3fdc745c9564b76ebd84aaffe19

    • SHA256

      472b8091593a2fef317573e75d7bd424ba67b164c0aaaa06c26de6b15d19bb04

    • SHA512

      1cc23482ce5a3ae33713c1aebb6ef503d211512934d12b873ba86d140f9d042dbbd1544aa399b5fefa5a371e24209a21f5994146d7cda9c5ffc63c4b0005b74a

    • 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 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.

    • suricata: ET MALWARE Common RAT Connectivity Check Observed

      suricata: ET MALWARE Common RAT Connectivity Check Observed

    • Executes dropped EXE

    • Checks computer location settings

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

    • Windows security modification

    • 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