General

  • Target

    1c7f91a5e04f5c80a1c9ec36a0b6a78e762359236ac67a5ea57c4083f44339c8

  • Size

    546KB

  • Sample

    210927-wyncpshgb6

  • MD5

    099bce8eba599fd7262af4fe930ab098

  • SHA1

    ccdfce07b8ca10a2b33e670dc09550e0b43d5dcb

  • SHA256

    1c7f91a5e04f5c80a1c9ec36a0b6a78e762359236ac67a5ea57c4083f44339c8

  • SHA512

    3b9aa646ba2862bbd1644ed62034dcf4ff3a6d4b9f63ecc95281832dfbc03cd96c4a1894150ea45b4288abd9eae9a7ee2fa01634a3d7232c169d4c7e3681e345

Malware Config

Extracted

Family

quasar

Mutex

Attributes
  • encryption_key

  • install_name

  • log_directory

  • reconnect_delay

    3000

  • startup_key

  • subdirectory

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

10.0.0.74:1177

Mutex

VNM_MUTEX_DweppWsG4TQ0OOm4Hi

Attributes
  • encryption_key

    G5PWQxh2RxlVLvkDxu7P

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      1c7f91a5e04f5c80a1c9ec36a0b6a78e762359236ac67a5ea57c4083f44339c8

    • Size

      546KB

    • MD5

      099bce8eba599fd7262af4fe930ab098

    • SHA1

      ccdfce07b8ca10a2b33e670dc09550e0b43d5dcb

    • SHA256

      1c7f91a5e04f5c80a1c9ec36a0b6a78e762359236ac67a5ea57c4083f44339c8

    • SHA512

      3b9aa646ba2862bbd1644ed62034dcf4ff3a6d4b9f63ecc95281832dfbc03cd96c4a1894150ea45b4288abd9eae9a7ee2fa01634a3d7232c169d4c7e3681e345

    • 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.

    • Executes dropped EXE

    • Loads dropped DLL

    • 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 Enterprise v6

Tasks