Overview

overview

10

Static

static

329b98802d...03.exe

windows7-x64

10

329b98802d...03.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    329b98802dad1219886d6912d0d5303f7d8012ff2c27fe0bd917b5b069865903

  • Size

    1.0MB

  • Sample

    230129-v3mrasfe83

  • MD5

    fc6cd521af42d5423b8ce0e53ae67703

  • SHA1

    49a14b2ba77028b1dfb8167bdafdd2908c40f861

  • SHA256

    329b98802dad1219886d6912d0d5303f7d8012ff2c27fe0bd917b5b069865903

  • SHA512

    0de482d1f6ae53197da70045f84f2071e3a17b9cc90a4e3b7c68c1210590fe5f6eb4ec86d1c233e4c0c4662fb639c861bed0c869509ddf9cf53b9b3b4b841bab

  • SSDEEP

    24576:ucvkTM6qPOgKbORmiNbbAb21NUJ2k+U1kYC80Oy2dj08:pvkT9Q+4miNG217k9Z5x

Score
10/10
quasarvenomratoffice04evasionratrootkitspywarestealertrojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

127.0.0.1:4782

rat94522.ddnsking.com:4000
Mutex

VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes
  • encryption_key

    WIwQFd2V7FhUXFH7QX71

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Venom Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      329b98802dad1219886d6912d0d5303f7d8012ff2c27fe0bd917b5b069865903

    • Size

      1.0MB

    • MD5

      fc6cd521af42d5423b8ce0e53ae67703

    • SHA1

      49a14b2ba77028b1dfb8167bdafdd2908c40f861

    • SHA256

      329b98802dad1219886d6912d0d5303f7d8012ff2c27fe0bd917b5b069865903

    • SHA512

      0de482d1f6ae53197da70045f84f2071e3a17b9cc90a4e3b7c68c1210590fe5f6eb4ec86d1c233e4c0c4662fb639c861bed0c869509ddf9cf53b9b3b4b841bab

    • SSDEEP

      24576:ucvkTM6qPOgKbORmiNbbAb21NUJ2k+U1kYC80Oy2dj08:pvkT9Q+4miNG217k9Z5x

    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

    • Executes dropped EXE

    • Checks computer location settings

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

    • Deletes itself

    • 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 v6

Initial Access

Execution

Persistence

Modify Existing Service

1
T1031

Privilege Escalation

Defense Evasion

Modify Registry

3
T1112

Disabling Security Tools

2
T1089

Install Root Certificate

1
T1130

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

Tasks