Analysis

  • max time kernel
    131s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    16-12-2024 15:19

General

  • Target

    IYBF9_Client.exe

  • Size

    74KB

  • MD5

    4e621ed074da8d121a8f419c00cb4c3a

  • SHA1

    723df7256adbaddecf269abfd255d28b5b860f1e

  • SHA256

    dca4f9884f0b0f5a1c534b3b2d867714b6ea7eac807bacf9e487e9a8d7e34355

  • SHA512

    77ebc87c1582d1f83195d2dd0f76432f895acac7b07cb1bca6599d7c42d83a544abcf719d9d80fc6e51cda05c6d9e3af06daed17a8fe970425030ab5fd0aaa1f

  • SSDEEP

    1536:SUaAcx2l/Cx2PMVie9VdQuDI6H1bf/k0WQzcuLVclN:SUDcx2Bq2PMVie9VdQsH1bfcjQnBY

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#.

  • Asyncrat family
  • VenomRAT 3 IoCs

    Detects VenomRAT.

  • Venomrat family
  • Async RAT payload 1 IoCs
  • 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
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 15 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\IYBF9_Client.exe
    "C:\Users\Admin\AppData\Local\Temp\IYBF9_Client.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2556
    • 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:2524
      • 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:800
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpBF88.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1972
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3064
      • 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:2960

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpBF88.tmp.bat

    Filesize

    152B

    MD5

    389c228a950a2e887d73a03c96ce9024

    SHA1

    e1e479da04bbe3a4e1450815c85daa28ad6be2cb

    SHA256

    0563c4498bc58ad6bc0f8b9f927a0b65d916a010198061566a8ba84fc1a415bf

    SHA512

    6f06413b4481c4e1d671d7f2cf2b62112eb23cd7dad8db31737172664f9e9b539a52e9da960cd70415f01cac14ca860fcdf370886a282e5bcfbab6ea6a830e0d

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

    Filesize

    8B

    MD5

    cf759e4c5f14fe3eec41b87ed756cea8

    SHA1

    c27c796bb3c2fac929359563676f4ba1ffada1f5

    SHA256

    c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

    SHA512

    c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

  • C:\Users\Admin\AppData\Roaming\defender.exe

    Filesize

    74KB

    MD5

    4e621ed074da8d121a8f419c00cb4c3a

    SHA1

    723df7256adbaddecf269abfd255d28b5b860f1e

    SHA256

    dca4f9884f0b0f5a1c534b3b2d867714b6ea7eac807bacf9e487e9a8d7e34355

    SHA512

    77ebc87c1582d1f83195d2dd0f76432f895acac7b07cb1bca6599d7c42d83a544abcf719d9d80fc6e51cda05c6d9e3af06daed17a8fe970425030ab5fd0aaa1f

  • memory/2556-0-0x000007FEF5E73000-0x000007FEF5E74000-memory.dmp

    Filesize

    4KB

  • memory/2556-1-0x0000000000170000-0x0000000000188000-memory.dmp

    Filesize

    96KB

  • memory/2556-3-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

    Filesize

    9.9MB

  • memory/2556-12-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

    Filesize

    9.9MB

  • memory/2556-14-0x000007FEF5E70000-0x000007FEF685C000-memory.dmp

    Filesize

    9.9MB

  • memory/2960-18-0x00000000011B0000-0x00000000011C8000-memory.dmp

    Filesize

    96KB