Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-04-2024 00:59

General

  • Target

    Client.exe

  • Size

    74KB

  • MD5

    feb7c3f368154a08ad7e52261979c08e

  • SHA1

    2131d762af7a5658ae4300082cbbfc61e5c42225

  • SHA256

    d17e143abae10ae5cd25c20e711365eb23b4c96cf0c03d09779faf8770d4c023

  • SHA512

    2a2c5abe02366fbbc632032391573e0c674136148cfed6968a02b2318cbabbd2c0e5395c3cd3179aaa25670300b5a071842c4b31423c24b87e657fc4c1210734

  • SSDEEP

    1536:iUKUcxoyR1CriPMVie9VdQuDI6H1bf/guQzcuLVclN:iUzcxoyXkiPMVie9VdQsH1bf7QnBY

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

66.66.146.74:9511

Mutex

ftjoxyioflhynjghiu

Attributes
  • delay

    1

  • install

    true

  • install_file

    svchost.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of FindShellTrayWindow 7 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.

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:3432
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4436
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:4136
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9182.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1272
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:4084
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • Executes dropped EXE
        • Enumerates connected drives
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SetWindowsHookEx
        PID:2676
  • C:\Windows\system32\AUDIODG.EXE
    C:\Windows\system32\AUDIODG.EXE 0x50c 0x2fc
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1920

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp9182.tmp.bat

    Filesize

    151B

    MD5

    61ff64692be1857fee234f81bb4c7b7a

    SHA1

    1356848f3d5e2633020ad4827589cdf5281391df

    SHA256

    913790aa96af7ae95152558ad0639adb96bec82154518e43fc44e81f97b288e1

    SHA512

    b9ac5263e0c252c9dd2a45811d8329db331af507096379aba93ea4a87b98b18cc2f6bae4cc676235454cb718d8efa39cbd8fd5cbe2be442772e05a6437765b05

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

    Filesize

    8B

    MD5

    cf759e4c5f14fe3eec41b87ed756cea8

    SHA1

    c27c796bb3c2fac929359563676f4ba1ffada1f5

    SHA256

    c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

    SHA512

    c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

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

    Filesize

    74KB

    MD5

    feb7c3f368154a08ad7e52261979c08e

    SHA1

    2131d762af7a5658ae4300082cbbfc61e5c42225

    SHA256

    d17e143abae10ae5cd25c20e711365eb23b4c96cf0c03d09779faf8770d4c023

    SHA512

    2a2c5abe02366fbbc632032391573e0c674136148cfed6968a02b2318cbabbd2c0e5395c3cd3179aaa25670300b5a071842c4b31423c24b87e657fc4c1210734

  • memory/2676-16-0x000000001D840000-0x000000001D8B6000-memory.dmp

    Filesize

    472KB

  • memory/2676-15-0x00007FF815C70000-0x00007FF816731000-memory.dmp

    Filesize

    10.8MB

  • memory/2676-17-0x000000001AFF0000-0x000000001AFFE000-memory.dmp

    Filesize

    56KB

  • memory/2676-18-0x000000001C360000-0x000000001C37E000-memory.dmp

    Filesize

    120KB

  • memory/2676-19-0x00007FF815C70000-0x00007FF816731000-memory.dmp

    Filesize

    10.8MB

  • memory/3432-9-0x00007FF815C70000-0x00007FF816731000-memory.dmp

    Filesize

    10.8MB

  • memory/3432-8-0x00007FF834650000-0x00007FF834845000-memory.dmp

    Filesize

    2.0MB

  • memory/3432-3-0x000000001B3C0000-0x000000001B3D0000-memory.dmp

    Filesize

    64KB

  • memory/3432-2-0x00007FF815C70000-0x00007FF816731000-memory.dmp

    Filesize

    10.8MB

  • memory/3432-0-0x0000000000850000-0x0000000000868000-memory.dmp

    Filesize

    96KB