Overview

overview

10

Static

static

10

IYBF9_Client.exe

windows7-x64

10

IYBF9_Client.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    142s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16-12-2024 15:19

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General

  • Target

    IYBF9_Client.exe

  • Size

    74KB

  • MD5

    4e621ed074da8d121a8f419c00cb4c3a

  • SHA1

    723df7256adbaddecf269abfd255d28b5b860f1e

  • SHA256

    dca4f9884f0b0f5a1c534b3b2d867714b6ea7eac807bacf9e487e9a8d7e34355

  • SHA512

    77ebc87c1582d1f83195d2dd0f76432f895acac7b07cb1bca6599d7c42d83a544abcf719d9d80fc6e51cda05c6d9e3af06daed17a8fe970425030ab5fd0aaa1f

  • SSDEEP

    1536:SUaAcx2l/Cx2PMVie9VdQuDI6H1bf/k0WQzcuLVclN:SUDcx2Bq2PMVie9VdQsH1bfcjQnBY

Score
10/10
asyncratvenomratdefaultrat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

127.0.0.1:4449

5.20.104.111:4449
Mutex

kekagthwfcue

Attributes
  • delay

    1

  • install

    true

  • install_file

    defender.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
  • 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
  • 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 33 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\IYBF9_Client.exe
    "C:\Users\Admin\AppData\Local\Temp\IYBF9_Client.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:920
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "defender" /tr '"C:\Users\Admin\AppData\Roaming\defender.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2680
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "defender" /tr '"C:\Users\Admin\AppData\Roaming\defender.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1584
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp82D5.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1092
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1036
      • C:\Users\Admin\AppData\Roaming\defender.exe
        "C:\Users\Admin\AppData\Roaming\defender.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:4260

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp82D5.tmp.bat
    Filesize

    152B

    MD5

    4a3b45f4274654dc8a5167d6f4bd5642

    SHA1

    3c67d7de0c2ae245bd1da93d6aeca584d8729300

    SHA256

    04b068d1abce5f5db23cd945bcda996a211ea3073a0cd099e3eb7239f5ad17a7

    SHA512

    f5449d6b8ce3c56d38b3923d4509ef003557177518b73600612bc0129ad0fdfd187649f80cae2b48b4bd9b326088ec3f838e8a17bf6c20b8febf1a1ef8a424a9

    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\defender.exe
    Filesize

    74KB

    MD5

    4e621ed074da8d121a8f419c00cb4c3a

    SHA1

    723df7256adbaddecf269abfd255d28b5b860f1e

    SHA256

    dca4f9884f0b0f5a1c534b3b2d867714b6ea7eac807bacf9e487e9a8d7e34355

    SHA512

    77ebc87c1582d1f83195d2dd0f76432f895acac7b07cb1bca6599d7c42d83a544abcf719d9d80fc6e51cda05c6d9e3af06daed17a8fe970425030ab5fd0aaa1f

    Download Submit

  • memory/920-0-0x00007FFF96933000-0x00007FFF96935000-memory.dmp

    Filesize

    8KB

    Download

  • memory/920-1-0x00000000000A0000-0x00000000000B8000-memory.dmp

    Filesize

    96KB

    Download

  • memory/920-3-0x00007FFF96930000-0x00007FFF973F1000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/920-8-0x00007FFF96930000-0x00007FFF973F1000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/920-9-0x00007FFF96930000-0x00007FFF973F1000-memory.dmp

    Filesize

    10.8MB

    Download