Overview

overview

10

Static

static

3

Build.exe

windows7-x64

6

Build.exe

windows10-2004-x64

10

Sharing

Copy URL
Twitter E-mail

General

  • Target

    Build.exe

  • Size

    15KB

  • Sample

    240529-jldxaafe2t

  • MD5

    27275853bd5996fb2f3767772d068d56

  • SHA1

    14fb4c3c74870f14af8c4cd7c8eafa81c99c70c2

  • SHA256

    abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03

  • SHA512

    7e05ec050eaea236c04d74042ac1b2d5634e2be0dd3b8807bada25c38f2f758de9cc25d69fcfd5086b949dc74b97ad2401bce9e6db541153cec60e33024cc887

  • SSDEEP

    384:twpcZrxSdohsUVdko8bxjsCa2txgb6P/sxErmM8/ANWUh:mpSk8VOfb2M669Sct

Score
10/10
quasaroffice04executionspywarestealertrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

31.177.108.29:4782

Mutex

553dcf2c-4c70-4c0c-935a-2e078a46f03e

Attributes
  • encryption_key

    DAFF70D249B4EC619D5A052FDD3418E3549FF268

  • install_name

    KR6nDu9fLhop1bFe.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Defender.Process

  • subdirectory

    SubDir

Targets

    • Target

      Build.exe

    • Size

      15KB

    • MD5

      27275853bd5996fb2f3767772d068d56

    • SHA1

      14fb4c3c74870f14af8c4cd7c8eafa81c99c70c2

    • SHA256

      abe621c37b2e40f6c6b3d9da15e37d4001188e10bac99e5d66c23cee23b98d03

    • SHA512

      7e05ec050eaea236c04d74042ac1b2d5634e2be0dd3b8807bada25c38f2f758de9cc25d69fcfd5086b949dc74b97ad2401bce9e6db541153cec60e33024cc887

    • SSDEEP

      384:twpcZrxSdohsUVdko8bxjsCa2txgb6P/sxErmM8/ANWUh:mpSk8VOfb2M669Sct

    Score
    10/10
    quasaroffice04executionspywarestealertrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

      execution

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer

    • Accesses cryptocurrency files/wallets, possible credential harvesting

      spyware

    • 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 v13

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Persistence

Scheduled Task/Job

1
T1053

Privilege Escalation

Scheduled Task/Job

1
T1053

Defense Evasion

Credential Access

Unsecured Credentials

2
T1552

Credentials In Files

2
T1552.001

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Data from Local System

2
T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks