Overview

overview

10

Static

static

10

Client-Built.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    157s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    30-06-2024 17:23

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General

  • Target

    Client-Built.exe

  • Size

    3.1MB

  • MD5

    a83d80a0db9a509be7acfa3c7ba9a066

  • SHA1

    6e3c59fc948ae86e8d2d38e42b232e397f40bc48

  • SHA256

    6bc733f11af6d7dce26816caa4e0bfba8f72db07c997b043619186a2e85589ed

  • SHA512

    eaef06a27315caf66127a0024831444ba85c621f50b73ba31c105fc0987902214226c83fbec005de3c0603d0bfff00516a44d63a64cd4301abb3fc2967bd1c99

  • SSDEEP

    49152:bvzlL26AaNeWgPhlmVqvMQ7XSKmAu4WDfR9YoGdfTrNGTHHB72eh2NT:bvpL26AaNeWgPhlmVqkQ7XSKmf4jv

Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.0.177:4782

Mutex

fd713a2a-810e-4800-b077-4b0e564f16e9

Attributes
  • encryption_key

    6B559FBA33993D944FD324F1D59D7F6E5BD04C2E

  • install_name

    WaveKeysGenrator.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    RATS

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

    trojanspywarequasar
  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence

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:2088
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\RATS\WaveKeysGenrator.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:4496
    • C:\Users\Admin\AppData\Roaming\RATS\WaveKeysGenrator.exe
      "C:\Users\Admin\AppData\Roaming\RATS\WaveKeysGenrator.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:964
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\RATS\WaveKeysGenrator.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2720

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1
T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\RATS\WaveKeysGenrator.exe
    Filesize

    3.1MB

    MD5

    a83d80a0db9a509be7acfa3c7ba9a066

    SHA1

    6e3c59fc948ae86e8d2d38e42b232e397f40bc48

    SHA256

    6bc733f11af6d7dce26816caa4e0bfba8f72db07c997b043619186a2e85589ed

    SHA512

    eaef06a27315caf66127a0024831444ba85c621f50b73ba31c105fc0987902214226c83fbec005de3c0603d0bfff00516a44d63a64cd4301abb3fc2967bd1c99

    Download Submit
  • memory/964-10-0x00007FFD124B0000-0x00007FFD12F72000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/964-11-0x00007FFD124B0000-0x00007FFD12F72000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/964-12-0x000000001C370000-0x000000001C3C0000-memory.dmp
    Filesize

    320KB

    Download
  • memory/964-13-0x000000001C480000-0x000000001C532000-memory.dmp
    Filesize

    712KB

    Download
  • memory/964-14-0x00007FFD124B0000-0x00007FFD12F72000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/2088-0-0x00007FFD124B3000-0x00007FFD124B5000-memory.dmp
    Filesize

    8KB

    Download
  • memory/2088-1-0x0000000000520000-0x0000000000844000-memory.dmp
    Filesize

    3.1MB

    Download
  • memory/2088-2-0x00007FFD124B0000-0x00007FFD12F72000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/2088-9-0x00007FFD124B0000-0x00007FFD12F72000-memory.dmp
    Filesize

    10.8MB

    Download