Overview

overview

10

Static

static

10

Client-built.exe

windows10-2004-x64

10

Client-built.exe

windows11-ltsc_2024-x64

Sharing

Copy URL Twitter E-mail

General

  • Target
    Client-built.exe
  • Size 1.6MB
  • Sample260619-qs4vlsgs4j
  • SHA256 5e48412547d6804fc7467997f62d58af1e80615ff3f7321c938c7aa87affc672
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasaroffice04defense_evasiondiscoverypersistenceprivilege_escalationspywarestealertrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.6.2

Botnet

  • Office04

C2

  • 193.8.215.36:14447

Mutex

  • c309e0cd-1863-44ff-9d03-abfdcd3f88a5

Attributes
  • encryption_key

    AE82780435B1CCEF85C04A1CA71F0D6403E04CAB

  • install_name

    Client.exe

  • key_salt

    5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Pulsar Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      Client-built.exe
    • Size 1.6MB
    • SHA256 5e48412547d6804fc7467997f62d58af1e80615ff3f7321c938c7aa87affc672
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    office04defense_evasiondiscoveryquasarpersistenceprivilege_escalationspywarestealertrojan

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Checks computer location settings

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

    • Reads user/profile data of web browsers

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

      spywarestealer

    • 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 Enterprise v16

Tasks