Overview

overview

10

Static

static

10

4ef1927705...f6.exe

windows7-x64

10

4ef1927705...f6.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    4ef1927705d28faf8456c200397d0af6

  • Size

    792KB

  • Sample

    240109-xjs53shfa4

  • MD5

    4ef1927705d28faf8456c200397d0af6

  • SHA1

    b92ab805e7c2884abcf371179b0d8989c4f90025

  • SHA256

    cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc

  • SHA512

    fe7f2405a8beb2bd70cfc689ce5ea3fc2cc4e03c72c925db698ea0e56b269b3e66c20f88afc382ea734e39b25cf66b0bcf24d72dab12d1b791ef91c690af17ac

  • SSDEEP

    6144:K8fGABIgrx8kFYLTiMkbmM28mA04ykdBbDqIJluHLmRZXqavbvmGaGy3V8/GV0j1:LPx7FYPiMq2fkdZ9JamPaaDvreg7

Score
10/10
quasarvenomratoffice04evasionratrootkitspywarestealertrojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

192.168.1.154:4782

Mutex

VNM_MUTEX_ph9lkMeWS6xgznetvP

Attributes
  • encryption_key

    2ABr09PX2FCCobHek8sv

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      4ef1927705d28faf8456c200397d0af6

    • Size

      792KB

    • MD5

      4ef1927705d28faf8456c200397d0af6

    • SHA1

      b92ab805e7c2884abcf371179b0d8989c4f90025

    • SHA256

      cd5a8de963a29d07bb003a8d03fa7ba38e5004641fe8138885c967db46bef0fc

    • SHA512

      fe7f2405a8beb2bd70cfc689ce5ea3fc2cc4e03c72c925db698ea0e56b269b3e66c20f88afc382ea734e39b25cf66b0bcf24d72dab12d1b791ef91c690af17ac

    • SSDEEP

      6144:K8fGABIgrx8kFYLTiMkbmM28mA04ykdBbDqIJluHLmRZXqavbvmGaGy3V8/GV0j1:LPx7FYPiMq2fkdZ9JamPaaDvreg7

    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 RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • VenomRAT

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

      ratrootkitstealervenomrat

    • Checks computer location settings

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

    • 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.

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1
T1053

Persistence

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Scheduled Task/Job

1
T1053

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

2
T1112

Impair Defenses

2
T1562

Disable or Modify Tools

2
T1562.001

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Remote System Discovery

1
T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks