Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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
  • 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 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 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\Client.exe
    "C:\Users\Admin\AppData\Local\Temp\Client.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2120
    • 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:2136
      • 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:2604
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp65C5.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2652
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2596
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:1648

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    68KB

    MD5

    29f65ba8e88c063813cc50a4ea544e93

    SHA1

    05a7040d5c127e68c25d81cc51271ffb8bef3568

    SHA256

    1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

    SHA512

    e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

  • C:\Users\Admin\AppData\Local\Temp\Tar8F0D.tmp

    Filesize

    177KB

    MD5

    435a9ac180383f9fa094131b173a2f7b

    SHA1

    76944ea657a9db94f9a4bef38f88c46ed4166983

    SHA256

    67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

    SHA512

    1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

  • C:\Users\Admin\AppData\Local\Temp\tmp65C5.tmp.bat

    Filesize

    151B

    MD5

    b14f172724424e3b85947bac8ce55804

    SHA1

    79835fefd1bde609cf47489329d7241becaccf2d

    SHA256

    2a4e94427f73d7e859c7ea793eedb7f0ee075b161c289bfdd321e7739933560b

    SHA512

    0f8360da64bd93d620150e3233c87e86fcc6fa29625e2ac64fc4d84de3678d639c8a08a12752ec18651280b1e8d9e82958f9375c662d2031b71f1b6030b45fdc

  • 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/1648-19-0x0000000000FD0000-0x0000000000FE8000-memory.dmp

    Filesize

    96KB

  • memory/1648-21-0x000007FEF4F50000-0x000007FEF593C000-memory.dmp

    Filesize

    9.9MB

  • memory/1648-22-0x000000001B310000-0x000000001B390000-memory.dmp

    Filesize

    512KB

  • memory/1648-23-0x00000000772C0000-0x0000000077469000-memory.dmp

    Filesize

    1.7MB

  • memory/1648-101-0x000007FEF4F50000-0x000007FEF593C000-memory.dmp

    Filesize

    9.9MB

  • memory/1648-122-0x00000000772C0000-0x0000000077469000-memory.dmp

    Filesize

    1.7MB

  • memory/2120-15-0x00000000772C0000-0x0000000077469000-memory.dmp

    Filesize

    1.7MB

  • memory/2120-14-0x000007FEF5940000-0x000007FEF632C000-memory.dmp

    Filesize

    9.9MB

  • memory/2120-0-0x0000000000B10000-0x0000000000B28000-memory.dmp

    Filesize

    96KB

  • memory/2120-4-0x00000000772C0000-0x0000000077469000-memory.dmp

    Filesize

    1.7MB

  • memory/2120-3-0x0000000002160000-0x00000000021E0000-memory.dmp

    Filesize

    512KB

  • memory/2120-1-0x000007FEF5940000-0x000007FEF632C000-memory.dmp

    Filesize

    9.9MB