Overview

overview

10

Static

static

1b465c6989...57.exe

windows7_x64

10

1b465c6989...57.exe

windows10_x64

10

Sharing

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General

  • Target
    1b465c6989637df1d5c511919c43e457.exe
  • Size 861KB
  • Sample211018-nn7dtsedfk
  • SHA256 0b196e6b27ed15410bd946b1ccfd1de6b7af64a540cd0226b8eb9bd742d1b095
  • MD5 SHA1 SHA512
Score
10/10
quasarvenomratoffice04evasionratrootkitspywarestealertrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 2.1.0.0

Botnet

  • Office04

C2

  • grace.adds-only.xyz:1609

Mutex

  • VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes
  • encryption_key

    wHq4o3k6UfKZv19jkcxs

  • install_name

    winrara.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      1b465c6989637df1d5c511919c43e457.exe
    • Size 861KB
    • SHA256 0b196e6b27ed15410bd946b1ccfd1de6b7af64a540cd0226b8eb9bd742d1b095
    • MD5 SHA1 SHA512
    Score
    10/10
    quasarvenomratoffice04evasionratrootkitspywarestealertrojan

    • 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

      evasiontrojan

    • Quasar Payload

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • VenomRAT

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

      ratrootkitstealervenomrat

    • Executes dropped EXE

    • Loads dropped DLL

    • Windows security modification

      evasiontrojan

    • 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

    behavioral1behavioral2

MITRE ATT&CK Enterprise v6

Tasks