Overview

overview

10

Static

static

10

Client.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250410-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/04/2025, 07:49

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General

  • Target

    Client.exe

  • Size

    74KB

  • MD5

    8858177a6b8c6874dc44570c1d6e47ab

  • SHA1

    e5692c7e3198378ef684dc4482599610bc8d1e60

  • SHA256

    5e1b238642a824af1333443f125f3e0e699768c9a33be81f899f65fecd4ba86f

  • SHA512

    92bfaf9d624c5c05cafff01fa9d21467e99f6f46455f2441e500e3f0f539be12b96968e1c7b96f9cca73141e1326476be58e9b3e7c0d2256685dc2ad55519876

  • SSDEEP

    1536:qUsgcxbVzCt+PPMVme9VdQuDI6H1bf/264QzcWLVclN:qU5cxblTPPMVme9VdQsH1bfO64QvBY

Score
10/10
asyncratvenomratdefaultrat

Malware Config

Extracted

Family

asyncrat

Version

L838 RAT v1.0.0

Botnet

Default

Mutex

uhuhlilars

Attributes
  • delay

    3

  • install

    true

  • install_file

    Windows Font Manager.exe

  • install_folder

    %AppData%

  • pastebin_config

    https://pastebin.com/raw/rVJQPNVe

aes.plain

Signatures

  • AsyncRat

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

    ratasyncrat
  • Asyncrat family
    asyncrat
  • VenomRAT 2 IoCs

    Detects VenomRAT.

    rat
  • Venomrat family
    venomrat
  • 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
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 1 IoCs
    defense_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 58 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 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:1112
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Font Manager" /tr '"C:\Users\Admin\AppData\Roaming\Windows Font Manager.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1884
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Windows Font Manager" /tr '"C:\Users\Admin\AppData\Roaming\Windows Font Manager.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2956
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6FA2.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:6084
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:5720
      • C:\Users\Admin\AppData\Roaming\Windows Font Manager.exe
        "C:\Users\Admin\AppData\Roaming\Windows Font Manager.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:5792

Network

MITRE ATT&CK Enterprise v16

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp6FA2.tmp.bat
    Filesize

    164B

    MD5

    f512a188968603666b21247688837502

    SHA1

    4a732b0b79a34350c57a8a47207787ee05557829

    SHA256

    b2c66c517d13d5ffe9f8c405efe5296c68315ea026405bdc80ca15c7d3ade499

    SHA512

    ba16c03d93488aaaa27eaacd77c646f126b16e58b9f743a56f04d6559742bcb8b94a384c17795d129f56f264e4ed34a1a0191648e3e953576308a27cafebb142

    Download Submit

  • C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
    Filesize

    8B

    MD5

    cf759e4c5f14fe3eec41b87ed756cea8

    SHA1

    c27c796bb3c2fac929359563676f4ba1ffada1f5

    SHA256

    c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

    SHA512

    c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

    Download Submit

  • C:\Users\Admin\AppData\Roaming\Windows Font Manager.exe
    Filesize

    74KB

    MD5

    8858177a6b8c6874dc44570c1d6e47ab

    SHA1

    e5692c7e3198378ef684dc4482599610bc8d1e60

    SHA256

    5e1b238642a824af1333443f125f3e0e699768c9a33be81f899f65fecd4ba86f

    SHA512

    92bfaf9d624c5c05cafff01fa9d21467e99f6f46455f2441e500e3f0f539be12b96968e1c7b96f9cca73141e1326476be58e9b3e7c0d2256685dc2ad55519876

    Download Submit

  • memory/1112-1-0x00007FFB7C7E0000-0x00007FFB7C981000-memory.dmp

    Filesize

    1.6MB

    Download

  • memory/1112-0-0x00000000000E0000-0x00000000000F8000-memory.dmp

    Filesize

    96KB

    Download

  • memory/1112-3-0x00007FFB7C7E0000-0x00007FFB7C981000-memory.dmp

    Filesize

    1.6MB

    Download

  • memory/1112-8-0x00007FFB7C7E0000-0x00007FFB7C981000-memory.dmp

    Filesize

    1.6MB

    Download

  • memory/1112-9-0x00007FFB7C7E0000-0x00007FFB7C981000-memory.dmp

    Filesize

    1.6MB

    Download