Overview

overview

10

Static

static

5941ff394c...f1.exe

windows7_x64

10

5941ff394c...f1.exe

windows10-2004_x64

10

Sharing

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General

  • Target

    5941ff394c1b579d7e9d99cbc2f7fdd7e7a2998f2744e16c3ace35d49081a1f1

  • Size

    814KB

  • Sample

    220325-hatb6afcej

  • MD5

    a14720279a25c2635029d82e0b395d8d

  • SHA1

    492f8568c09739c0ec3eae755c301be067ba7c3a

  • SHA256

    5941ff394c1b579d7e9d99cbc2f7fdd7e7a2998f2744e16c3ace35d49081a1f1

  • SHA512

    4c4001b3232257376437c7696e17671f35dde68b9c86a21690edad93d91ae80e4811e4d7b217d252534c9d51d6a3d259d29e572466997932217886f7f57db71f

Score
10/10
quasarvenomratshopevasionpersistenceratrootkitspywarestealertrojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

shop

C2

185.204.1.236:4521

Mutex

VNM_MUTEX_1NgafS3xkifQY5TYWL

Attributes
  • encryption_key

    5KaBFSa6AfCkIN5zPsZV

  • install_name

    $77loader.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    dllhost

  • subdirectory

    $77loader

Targets

    • Target

      5941ff394c1b579d7e9d99cbc2f7fdd7e7a2998f2744e16c3ace35d49081a1f1

    • Size

      814KB

    • MD5

      a14720279a25c2635029d82e0b395d8d

    • SHA1

      492f8568c09739c0ec3eae755c301be067ba7c3a

    • SHA256

      5941ff394c1b579d7e9d99cbc2f7fdd7e7a2998f2744e16c3ace35d49081a1f1

    • SHA512

      4c4001b3232257376437c7696e17671f35dde68b9c86a21690edad93d91ae80e4811e4d7b217d252534c9d51d6a3d259d29e572466997932217886f7f57db71f

    Score
    10/10
    quasarvenomratshopevasionpersistenceratrootkitspywarestealertrojan

    • 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 Payload

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • 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.

    • 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.

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1
T1053

Persistence

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

3
T1112

Disabling Security Tools

2
T1089

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks