Overview

overview

10

Static

static

3

0fdee64f4e...40.exe

windows7-x64

10

0fdee64f4e...40.exe

windows10-2004-x64

10

Sharing

Copy URL
Twitter E-mail

General

  • Target

    0fdee64f4eb558b0d6e1a5a568095e40

  • Size

    880KB

  • Sample

    231221-15eflacbhj

  • MD5

    0fdee64f4eb558b0d6e1a5a568095e40

  • SHA1

    55ca1696afa36ab5f36d3c2944a03bb988335d97

  • SHA256

    c7a070b7e06000af25f9fe5f44cfacfd4ac4a02371369267ad10cf3beaed8d4b

  • SHA512

    ddf3de5d0f69a29818f683c46ccd70891455f8781e46cf1ac37b740b67e74eea4408920ef3a54878707c81b74b2dc13337838a6521880a0c9f912cc7251bfe44

  • SSDEEP

    24576:zhOjdWkJhngpn9kNsMwbMgkK589joyhkIS:zgjdbDnKkK3MgkK56

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

      0fdee64f4eb558b0d6e1a5a568095e40

    • Size

      880KB

    • MD5

      0fdee64f4eb558b0d6e1a5a568095e40

    • SHA1

      55ca1696afa36ab5f36d3c2944a03bb988335d97

    • SHA256

      c7a070b7e06000af25f9fe5f44cfacfd4ac4a02371369267ad10cf3beaed8d4b

    • SHA512

      ddf3de5d0f69a29818f683c46ccd70891455f8781e46cf1ac37b740b67e74eea4408920ef3a54878707c81b74b2dc13337838a6521880a0c9f912cc7251bfe44

    • SSDEEP

      24576:zhOjdWkJhngpn9kNsMwbMgkK589joyhkIS:zgjdbDnKkK3MgkK56

    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

    • 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

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks