Overview

overview

10

Static

static

3

efbb56f838...39.exe

windows7-x64

10

efbb56f838...39.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    efbb56f8386d1881cc20a3de36686239

  • Size

    16.8MB

  • Sample

    231220-vg8fwahfdn

  • MD5

    efbb56f8386d1881cc20a3de36686239

  • SHA1

    b58ff7105f942a68c58cdc2fb80e3bf8d0a8de16

  • SHA256

    10c0a60ca1b17282e0853e2134e7d67b604b1b38a66677fb99ef918672be2c79

  • SHA512

    e2d9f182859273c9f13bdf3fd87fa5818676b1f7b41da556ac3c724ab75e50db64e7421632ca0e3d5b4d4d4f519d54484af1a3e4da919d665475a8715bc63311

  • SSDEEP

    393216:hRwHfrE1h2ye2vmGpEeaQrg8OUEsf3iCZOuko4xgWL74hwtG1ZtJRjHYX:4HfrEKgJeehrSW3NOVoudPliZtTHYX

Score
10/10
quasarvenomratoffice04evasionratrootkitspywarestealertrojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

smtp.yassine-bolard.nl:72

82.65.150.176:72
Mutex

VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes
  • encryption_key

    V8QkE5vrgV4DVybE2MTP

  • install_name

    $77Discord.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Discord

  • subdirectory

    Discord

Targets

    • Target

      efbb56f8386d1881cc20a3de36686239

    • Size

      16.8MB

    • MD5

      efbb56f8386d1881cc20a3de36686239

    • SHA1

      b58ff7105f942a68c58cdc2fb80e3bf8d0a8de16

    • SHA256

      10c0a60ca1b17282e0853e2134e7d67b604b1b38a66677fb99ef918672be2c79

    • SHA512

      e2d9f182859273c9f13bdf3fd87fa5818676b1f7b41da556ac3c724ab75e50db64e7421632ca0e3d5b4d4d4f519d54484af1a3e4da919d665475a8715bc63311

    • SSDEEP

      393216:hRwHfrE1h2ye2vmGpEeaQrg8OUEsf3iCZOuko4xgWL74hwtG1ZtJRjHYX:4HfrEKgJeehrSW3NOVoudPliZtTHYX

    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

    • Nirsoft

    • Checks computer location settings

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

    • Deletes itself

    • Executes dropped EXE

    • 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.

    • Drops file in System32 directory

    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

Scheduled Task/Job

1
T1053

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

2
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