Overview

overview

10

Static

static

10

Client-built.exe

windows10-ltsc 2021-x64

10

Client-built.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    26-10-2024 23:27

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General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    f376797b0fee565e345961746ce5d488

  • SHA1

    e411ca3cedf4390229637f7dc5b2f9098f289c31

  • SHA256

    ec7ebcd2b6c9289969840948cb7f523d3b67cad6cae1955b7e9ef059b0218dc0

  • SHA512

    e3323855730d474343249738a5d2e74df819f6dc02f553b3c769e988a8b5d9f607031921cb5f98cfd696474fec6590d6daac65d1caa14a1da50c564e23737f60

  • SSDEEP

    49152:XvzlL26AaNeWgPhlmVqvMQ7XSKoSRJ6fbR3LoGdATHHB72eh2NT:XvpL26AaNeWgPhlmVqkQ7XSKoSRJ6x

Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

Index1337z-43991.portmap.host:43991

Mutex

0078aebf-454a-4862-8d16-b94bd8465d38

Attributes
  • encryption_key

    3833C35AA932103E67A3C2ED814028BCDAEA8E15

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

    trojanspywarequasar
  • Quasar family
    quasar
  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4884
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2364

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
    Filesize

    3.1MB

    MD5

    f376797b0fee565e345961746ce5d488

    SHA1

    e411ca3cedf4390229637f7dc5b2f9098f289c31

    SHA256

    ec7ebcd2b6c9289969840948cb7f523d3b67cad6cae1955b7e9ef059b0218dc0

    SHA512

    e3323855730d474343249738a5d2e74df819f6dc02f553b3c769e988a8b5d9f607031921cb5f98cfd696474fec6590d6daac65d1caa14a1da50c564e23737f60

    Download Submit

  • memory/2364-8-0x00007FFB676F0000-0x00007FFB681B2000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/2364-10-0x00007FFB676F0000-0x00007FFB681B2000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/2364-11-0x000000001BFE0000-0x000000001C030000-memory.dmp

    Filesize

    320KB

    Download

  • memory/2364-12-0x000000001C0F0000-0x000000001C1A2000-memory.dmp

    Filesize

    712KB

    Download

  • memory/2364-13-0x00007FFB676F0000-0x00007FFB681B2000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/4884-0-0x00007FFB676F3000-0x00007FFB676F5000-memory.dmp

    Filesize

    8KB

    Download

  • memory/4884-1-0x00000000009D0000-0x0000000000CF4000-memory.dmp

    Filesize

    3.1MB

    Download

  • memory/4884-2-0x00007FFB676F0000-0x00007FFB681B2000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/4884-9-0x00007FFB676F0000-0x00007FFB681B2000-memory.dmp

    Filesize

    10.8MB

    Download