Overview

overview

10

Static

static

3

4942e9c134...3c.exe

windows7-x64

10

4942e9c134...3c.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    4942e9c13479bc1a62bdb07b23474e3c.exe

  • Size

    639KB

  • Sample

    240107-xsjm1ache3

  • MD5

    4942e9c13479bc1a62bdb07b23474e3c

  • SHA1

    d7a7283939a2fa4506b47fa809431b9cc4d2559e

  • SHA256

    5b11f30be6e3bfb808c25d07b492cfa12840fd0efa795d8af397feba045d1c59

  • SHA512

    8c8edd299922fcfa100e3e725d1b09259a86e41546361273c386177a3e2a765ffc76169a5b9d142efb4c5335bee3805c1f908c7f4edae0f0a33f2631a037eb59

  • SSDEEP

    12288:66bJhnrd2Qsm/+/dnGz7O0Y244sMYcoFMVyMg+Yy1Wcwemn58WgxWM:6kJhngpn9kNsMwbMgkK58WgQM

Score
10/10
quasarvenomratsep05evasionpersistenceratrootkitspywarestealertrojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

SEP05

C2

23.105.131.187:7812

Mutex

VNM_MUTEX_ea14HLQ5adxyrFdD2X

Attributes
  • encryption_key

    jUWfdDb1toPE0KAlGJWH

  • install_name

    Windows Security.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Update Service

  • subdirectory

    Windows Security Update

Targets

    • Target

      4942e9c13479bc1a62bdb07b23474e3c.exe

    • Size

      639KB

    • MD5

      4942e9c13479bc1a62bdb07b23474e3c

    • SHA1

      d7a7283939a2fa4506b47fa809431b9cc4d2559e

    • SHA256

      5b11f30be6e3bfb808c25d07b492cfa12840fd0efa795d8af397feba045d1c59

    • SHA512

      8c8edd299922fcfa100e3e725d1b09259a86e41546361273c386177a3e2a765ffc76169a5b9d142efb4c5335bee3805c1f908c7f4edae0f0a33f2631a037eb59

    • SSDEEP

      12288:66bJhnrd2Qsm/+/dnGz7O0Y244sMYcoFMVyMg+Yy1Wcwemn58WgxWM:6kJhngpn9kNsMwbMgkK58WgQM

    Score
    10/10
    quasarvenomratsep05evasionpersistenceratrootkitspywarestealertrojan

    • 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

    • Executes dropped EXE

    • Loads dropped DLL

    • Windows security modification

      evasiontrojan

    • Adds Run key to start application

      persistence

    • 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 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

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

3
T1112

Impair Defenses

2
T1562

Disable or Modify Tools

2
T1562.001

Credential Access

Discovery

Remote System Discovery

1
T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks