Overview

overview

10

Static

static

10

bK91.exe

windows7-x64

10

bK91.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    bK91.exe
  • Size 348KB
  • Sample230318-aemfeaae52
  • SHA256 131b876752d63234d51e97f4558d1a35a8dcdc55794320e1426fd37691033c72
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.3.0.0

Botnet

  • Office04

C2

  • 0.tcp.sa.ngrok.io:14992

Mutex

  • QSR_MUTEX_vvc4zswzxNM6wzpP6M

Attributes
  • encryption_key

    n59mRujhjsNoSWVQhDSE

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      bK91.exe
    • Size 348KB
    • SHA256 131b876752d63234d51e97f4558d1a35a8dcdc55794320e1426fd37691033c72
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasaroffice04spywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    behavioral1behavioral2

MITRE ATT&CK Enterprise v6

Tasks