Overview

overview

10

Static

static

3

91086ef243...95.exe

windows7-x64

10

91086ef243...95.exe

windows10-2004-x64

10

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General

  • Target

    91086ef2437049d4cfcb66149acf0d95

  • Size

    653KB

  • Sample

    240205-e14zsscdar

  • MD5

    91086ef2437049d4cfcb66149acf0d95

  • SHA1

    ac9cfed7ccfcd8676b437e753abdf7fc06981f71

  • SHA256

    1c5bb8ac1735f400b18f16ed5daab07575ba4aaedb4da31ca5cd89205bb40141

  • SHA512

    effe216b30c6371065d467e585f95db5106c35376a8fe430880a4e965c3a7927fb0453945036b19a6e0e7ec3d4a1290eee6e2445b68cd748086082da29db8046

  • SSDEEP

    12288:bYBbFriWGl7gO03m4sRqJ2IOEEVR/7r+pKnoqsxWbvoyF3db6e0Rqs4J7S:MBxrd4lA7OvR/fqKoqsxsvoyFtbsqsJ

Score
10/10
quasarvenomratwindows firewallevasionpersistenceratrootkitspywarestealertrojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Windows firewall

C2

23.105.131.187:7812

Mutex

VNM_MUTEX_zGeT5SjdI1pYgFyiav

Attributes
  • encryption_key

    3kpwI2tkVNrXY2Mm5wlR

  • install_name

    Windows Security.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Update

  • subdirectory

    Windows Firewall Updates

Targets

    • Target

      91086ef2437049d4cfcb66149acf0d95

    • Size

      653KB

    • MD5

      91086ef2437049d4cfcb66149acf0d95

    • SHA1

      ac9cfed7ccfcd8676b437e753abdf7fc06981f71

    • SHA256

      1c5bb8ac1735f400b18f16ed5daab07575ba4aaedb4da31ca5cd89205bb40141

    • SHA512

      effe216b30c6371065d467e585f95db5106c35376a8fe430880a4e965c3a7927fb0453945036b19a6e0e7ec3d4a1290eee6e2445b68cd748086082da29db8046

    • SSDEEP

      12288:bYBbFriWGl7gO03m4sRqJ2IOEEVR/7r+pKnoqsxWbvoyF3db6e0Rqs4J7S:MBxrd4lA7OvR/fqKoqsxsvoyFtbsqsJ

    Score
    10/10
    quasarvenomratwindows firewallevasionpersistenceratrootkitspywarestealertrojan

    • 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

    • 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

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