Overview

overview

10

Static

static

10

Client.exe

windows10-ltsc 2021-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    142s
  • 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 05:28

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General

  • Target

    Client.exe

  • Size

    48KB

  • MD5

    68f2d65dea3c0a0bf93e24f2ffc7e989

  • SHA1

    ff164969d1b66b05a96c6c7605a86d6123b41c36

  • SHA256

    d31230b3534ad30710c6e5e20e3ba86a6e231247bb7cc69c000fcf244119ab5d

  • SHA512

    9305994232b6e53c05e948700b5e26e907102f0be6282eb725c15e7b86337bf809a853ade3e4a5e02ce0502f15729b89052896885a9d73fd57dcbc120e1d9a6a

  • SSDEEP

    768:1UcRUbDILQe08+bixtelDSN+iV08YbygeuLmik/vEgK/JbWfVc6KN:mc8ExtKDs4zb1JA/nkJbWfVclN

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:3900
    • 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:1192
      • 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:2344
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp85CA.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2888
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:4356
      • 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:2840

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp85CA.tmp.bat
    Filesize

    162B

    MD5

    294be986307ee307239439270f1fe013

    SHA1

    50f68fd6f79e0b5afacb3bfc495ec0ee638d4b32

    SHA256

    71dcbcd7c56dc561b2f92ad1338a9be4831637a94f2ed77b8fcae542489c3858

    SHA512

    c63de855f5939f40a63baee09087efab9f1d07dddc942c69d7e70cfeaaad07afec4b27b7bf79647d79948fa01a88ce93457fa79c8df8990487d13ed51cb4592b

    Download Submit

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

    48KB

    MD5

    68f2d65dea3c0a0bf93e24f2ffc7e989

    SHA1

    ff164969d1b66b05a96c6c7605a86d6123b41c36

    SHA256

    d31230b3534ad30710c6e5e20e3ba86a6e231247bb7cc69c000fcf244119ab5d

    SHA512

    9305994232b6e53c05e948700b5e26e907102f0be6282eb725c15e7b86337bf809a853ade3e4a5e02ce0502f15729b89052896885a9d73fd57dcbc120e1d9a6a

    Download Submit

  • memory/3900-0-0x00007FFB8FC73000-0x00007FFB8FC75000-memory.dmp

    Filesize

    8KB

    Download

  • memory/3900-1-0x0000000000B00000-0x0000000000B12000-memory.dmp

    Filesize

    72KB

    Download

  • memory/3900-2-0x00007FFB8FC70000-0x00007FFB90732000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/3900-7-0x00007FFB8FC70000-0x00007FFB90732000-memory.dmp

    Filesize

    10.8MB

    Download