Overview

overview

10

Static

static

10

Client-built.exe

windows10-ltsc 2021-x64

10

Client-built.exe

windows11-21h2-x64

10

Sharing

Copy URL
Twitter E-mail

General

  • Target

    Client-built.exe

  • Size

    288KB

  • Sample

    250120-x8a1ssvmem

  • MD5

    3dbf24c6a4987b936ba4b9b8b7fefe06

  • SHA1

    4fa176f14c237c461b66ec19aa24fd4ea47fa1f8

  • SHA256

    5a07439ecad1b2bc0fa2fe6b42c85a9fbfd81172b8d2a0b934c92e664ad9abb1

  • SHA512

    9ab6f4d77711a6f2cb9e600642313319aa76cdf055be3f485b8121d44c762f5c3cfbc573f63cedbdf4b96fab64e53dfcd9309856327ba37bf5471c7126503d17

  • SSDEEP

    6144:bRSjIXAnZQel5w7T4P5Kq+SMv0VGb7bDcllbk0q:g4AZrg7g9zVGkllbkB

Score
10/10
quasaroffice04discoverypersistencespywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office04

C2

airport-forums.gl.at.ply.gg:20417

Mutex

CjFw2DwFEbLLnL7ypo

Attributes
  • encryption_key

    uEA5Kpp3BoIvHdDLxJnW

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target

      Client-built.exe

    • Size

      288KB

    • MD5

      3dbf24c6a4987b936ba4b9b8b7fefe06

    • SHA1

      4fa176f14c237c461b66ec19aa24fd4ea47fa1f8

    • SHA256

      5a07439ecad1b2bc0fa2fe6b42c85a9fbfd81172b8d2a0b934c92e664ad9abb1

    • SHA512

      9ab6f4d77711a6f2cb9e600642313319aa76cdf055be3f485b8121d44c762f5c3cfbc573f63cedbdf4b96fab64e53dfcd9309856327ba37bf5471c7126503d17

    • SSDEEP

      6144:bRSjIXAnZQel5w7T4P5Kq+SMv0VGb7bDcllbk0q:g4AZrg7g9zVGkllbkB

    Score
    10/10
    quasaroffice04discoveryspywaretrojanpersistence

    • Modifies WinLogon for persistence

      persistence

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar family

      quasar

    • Quasar payload

    • Executes dropped EXE

    • 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.

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks