Overview

overview

10

Static

static

3

2c3dd563b1...48.exe

windows10-2004-x64

Sharing

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General

  • Target
    2c3dd563b1e0c39208261913d2b9312480ca939a60dcbe86bc860e8959e48548
  • Size 697KB
  • Sample260824-l3ldsseq9v
  • SHA256 2c3dd563b1e0c39208261913d2b9312480ca939a60dcbe86bc860e8959e48548
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasarvenomratoffice04defense_evasiondiscoveryevasionexecutionpersistenceratrootkitspywarestealertrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 2.1.0.0

Botnet

  • Office04

C2

  • armadada.ddns.net:4782

Mutex

  • VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes
  • encryption_key

    8SaDmGQtcm4Ys5TDXATO

  • install_name

    Client.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      2c3dd563b1e0c39208261913d2b9312480ca939a60dcbe86bc860e8959e48548
    • Size 697KB
    • SHA256 2c3dd563b1e0c39208261913d2b9312480ca939a60dcbe86bc860e8959e48548
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    office04defense_evasiondiscoveryevasionexecutionquasarvenomratpersistenceratrootkitspywarestealertrojan

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Family: VenomRAT

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

      ratrootkitstealervenomrat

    • Modifies Windows Defender DisableAntiSpyware settings

      evasiontrojan

    • Modifies Windows Defender Real-time Protection settings

      defense_evasiontrojan

    • Modifies Windows Defender TamperProtection settings

      evasiontrojan

    • Quasar payload

    • Checks computer location settings

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

    • Executes dropped EXE

    • Windows security modification

      defense_evasiontrojan

    • Drops desktop.ini file(s)

    • Looks up external IP address via web service

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

      discovery
    behavioral1

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

Windows Command Shell

1
T1059.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Create or Modify System Process

3
T1543

Windows Service

3
T1543.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Create or Modify System Process

3
T1543

Windows Service

3
T1543.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Impair Defenses

4
T1562

Disable or Modify Tools

4
T1562.001

Modify Registry

4
T1112

Credential Access

Discovery

Query Registry

1
T1012

Remote System Discovery

1
T1018

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Network Configuration Discovery

2
T1016

Internet Connection Discovery

2
T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks