General

  • Target

    bc263ac14818e3dd2e48cc8954eadd8ec99a9287929f749cda1d5fa55ee4975c

  • Size

    699KB

  • Sample

    220417-sc8vqsgfhn

  • MD5

    5807ae1cd17e7f9bc109b3df90b243ba

  • SHA1

    08595bc28d5f185fce26da9e8362d05ad6eed16d

  • SHA256

    bc263ac14818e3dd2e48cc8954eadd8ec99a9287929f749cda1d5fa55ee4975c

  • SHA512

    ad790053c056b0bf519c2bae2585c17f063ecc30961936f78092b9684df693d1eb83b15422841172ebb9398a689b4d3f115efb44bbd156739278cca4147482a9

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

2.tcp.ngrok.io:12699

Mutex

VNM_MUTEX_ljpH86m9yQvMdFiQrM

Attributes
  • encryption_key

    u0b02uZLknYm9c6g9jJR

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Security

  • subdirectory

    SubDir

Targets

    • Target

      bc263ac14818e3dd2e48cc8954eadd8ec99a9287929f749cda1d5fa55ee4975c

    • Size

      699KB

    • MD5

      5807ae1cd17e7f9bc109b3df90b243ba

    • SHA1

      08595bc28d5f185fce26da9e8362d05ad6eed16d

    • SHA256

      bc263ac14818e3dd2e48cc8954eadd8ec99a9287929f749cda1d5fa55ee4975c

    • SHA512

      ad790053c056b0bf519c2bae2585c17f063ecc30961936f78092b9684df693d1eb83b15422841172ebb9398a689b4d3f115efb44bbd156739278cca4147482a9

    • 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.

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

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

    • 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