Overview

overview

10

Static

static

10

Client.exe

windows10-ltsc 2021-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    135s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    10-11-2024 05:29

Sharing

Copy URL
Twitter E-mail
Report Analysis Logs

General

  • Target

    Client.exe

  • Size

    48KB

  • MD5

    3b4c1a3663d6d5ae561b793822b045ab

  • SHA1

    2ef8222de19762ab8558922b3ba3cfe53285b7ae

  • SHA256

    56ab78b1f5f73c93d063d4c85837353b96c19bdacecb1d4ed955d170d2553980

  • SHA512

    034bdc45bed22d7ad968ce7b6747ba2dfb80d350a82f77d291e01bb0076fb69e7fa79ff4f4b8160ae6779d466123fe50278c7c8ee3d04ce0c3ff9b2202e27b16

  • SSDEEP

    768:1UcRUbDILQe08+bixtelDSN+iV08YbygextUBl/of1vEgK/JbWfVc6KN:mc8ExtKDs4zb10yBJK1nkJbWfVclN

Score
10/10
asyncratdefaultrat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

127.0.0.1:8848

Mutex

DcRatMutex_qwqdanchun

Attributes
  • delay

    1

  • install

    true

  • install_file

    opus hook injector.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

    ratasyncrat
  • Asyncrat family
    asyncrat
  • Async RAT payload 1 IoCs
    rat
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 10 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.exe
    "C:\Users\Admin\AppData\Local\Temp\Client.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4180
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "opus hook injector" /tr '"C:\Users\Admin\AppData\Roaming\opus hook injector.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:112
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "opus hook injector" /tr '"C:\Users\Admin\AppData\Roaming\opus hook injector.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:116
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB3FE.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2108
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3304
      • C:\Users\Admin\AppData\Roaming\opus hook injector.exe
        "C:\Users\Admin\AppData\Roaming\opus hook injector.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4664

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpB3FE.tmp.bat
    Filesize

    162B

    MD5

    a55d0c330c3f1e0e2431d42b01c339a9

    SHA1

    fef61069582e9fc00a4ceb982b94761fd843507d

    SHA256

    83d46d9109e940192935f5d25c30019962ebb9a32d7c99c69cf91f51cb7dc16b

    SHA512

    b6c4e99f221e6d371e1d945a515566f8ce7c8beea2ea72798359ce867d03c473fe2ad855bc3a3e3dfd0439b7fbf0bd6d6fe6e5f41ca2eaa1e0c43e321de58c07

    Download Submit

  • C:\Users\Admin\AppData\Roaming\opus hook injector.exe
    Filesize

    48KB

    MD5

    3b4c1a3663d6d5ae561b793822b045ab

    SHA1

    2ef8222de19762ab8558922b3ba3cfe53285b7ae

    SHA256

    56ab78b1f5f73c93d063d4c85837353b96c19bdacecb1d4ed955d170d2553980

    SHA512

    034bdc45bed22d7ad968ce7b6747ba2dfb80d350a82f77d291e01bb0076fb69e7fa79ff4f4b8160ae6779d466123fe50278c7c8ee3d04ce0c3ff9b2202e27b16

    Download Submit

  • memory/4180-1-0x00007FF8A9713000-0x00007FF8A9715000-memory.dmp

    Filesize

    8KB

    Download

  • memory/4180-0-0x0000000000F70000-0x0000000000F82000-memory.dmp

    Filesize

    72KB

    Download

  • memory/4180-2-0x00007FF8A9710000-0x00007FF8AA1D2000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/4180-7-0x00007FF8A9710000-0x00007FF8AA1D2000-memory.dmp

    Filesize

    10.8MB

    Download