Overview

overview

10

Static

static

10

Client-built.exe

windows11-21h2-x64

10

Sharing

Copy URL Twitter E-mail

General

  • Target
    Client-built.exe
  • Size 3.1MB
  • Sample260926-whtjsazvb1
  • SHA256 7c92be51e355008ec6a1de3af77196610f9e64e471cd2092619d3eac2fcad261
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasaroffice04discoveryexecutionpersistencespywarestealertrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • Office04

C2

  • 213.5.130.233:4782

Mutex

  • 5f630c33-58ac-494f-a81b-d35ebdf6ffe4

Attributes
  • encryption_key

    1A94C505EF562F709B605BDB44FED306971968A2

  • install_name

    ServicesClientProtocol.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    MEGA-CLOUD

  • subdirectory

    Microsoft

Targets

    • Target
      Client-built.exe
    • Size 3.1MB
    • SHA256 7c92be51e355008ec6a1de3af77196610f9e64e471cd2092619d3eac2fcad261
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    office04discoveryexecutionquasarpersistencespywarestealertrojan

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Executes dropped EXE

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

      spywarestealer

    • Reads user/profile data of web browsers

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

      spywarestealer
    behavioral1

MITRE ATT&CK Enterprise v16

Tasks