Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240215-en
  • resource tags

    arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
  • submitted
    16-04-2024 21:45

General

  • Target

    assssss.exe

  • Size

    74KB

  • MD5

    00633c71d9fa6e703dacc8c6266b2613

  • SHA1

    c673396470a64a46c5c96643aa7558a35722faf2

  • SHA256

    cef1b063659f6f90cb4a3d0dc14295919ea7c11020918d9c3a01a7705dd2e175

  • SHA512

    840a93b7d5e992176f672618b8f4f23f0e697093656914525229555970dd91c19ceec1996d6d00d5ca372b029e944164d73d36d19994ad5c435618b6efa8f0cf

  • SSDEEP

    1536:eUYccx0dxCKg6PMV1QKI/H1bz/uVSjhaQzcaLVclN:eUlcx0f9g6PMV1QzH1bzW6haQLBY

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

66.66.146.74:9511

Mutex

kvudvdwyjbukkqcnuoq

Attributes
  • delay

    1

  • install

    true

  • install_file

    Windows Host.exe

  • install_folder

    %Temp%

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 32 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\assssss.exe
    "C:\Users\Admin\AppData\Local\Temp\assssss.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2916
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Host" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows Host.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2004
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Windows Host" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows Host.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:2632
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp1E2B.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2512
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2660
      • C:\Users\Admin\AppData\Local\Temp\Windows Host.exe
        "C:\Users\Admin\AppData\Local\Temp\Windows Host.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:2872

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\Tar799A.tmp

    Filesize

    177KB

    MD5

    435a9ac180383f9fa094131b173a2f7b

    SHA1

    76944ea657a9db94f9a4bef38f88c46ed4166983

    SHA256

    67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

    SHA512

    1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

  • C:\Users\Admin\AppData\Local\Temp\Windows Host.exe

    Filesize

    74KB

    MD5

    00633c71d9fa6e703dacc8c6266b2613

    SHA1

    c673396470a64a46c5c96643aa7558a35722faf2

    SHA256

    cef1b063659f6f90cb4a3d0dc14295919ea7c11020918d9c3a01a7705dd2e175

    SHA512

    840a93b7d5e992176f672618b8f4f23f0e697093656914525229555970dd91c19ceec1996d6d00d5ca372b029e944164d73d36d19994ad5c435618b6efa8f0cf

  • C:\Users\Admin\AppData\Local\Temp\tmp1E2B.tmp.bat

    Filesize

    159B

    MD5

    ea0b531ff1c470078c42fbeba83602f1

    SHA1

    146342009c49a09bcfef925679b5eccfba176dad

    SHA256

    e9dfb67091f0709e019a865c7a6466620e527c3a6269e79b140e77d63f81ca1a

    SHA512

    0758e8eb8e2dabbd853a6e5ada17633d6b79a9d5a00a8b1051047aa53e252be537dd98809cd4c0bf26087ced7f71c81d0e9cfdd74bb2c29e553ed0851a36fb64

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

    Filesize

    8B

    MD5

    cf759e4c5f14fe3eec41b87ed756cea8

    SHA1

    c27c796bb3c2fac929359563676f4ba1ffada1f5

    SHA256

    c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

    SHA512

    c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

  • memory/2872-23-0x0000000077060000-0x0000000077209000-memory.dmp

    Filesize

    1.7MB

  • memory/2872-19-0x00000000000C0000-0x00000000000D8000-memory.dmp

    Filesize

    96KB

  • memory/2872-20-0x000007FEF49A0000-0x000007FEF538C000-memory.dmp

    Filesize

    9.9MB

  • memory/2872-22-0x0000000000690000-0x0000000000710000-memory.dmp

    Filesize

    512KB

  • memory/2872-41-0x000007FEF49A0000-0x000007FEF538C000-memory.dmp

    Filesize

    9.9MB

  • memory/2872-62-0x0000000000690000-0x0000000000710000-memory.dmp

    Filesize

    512KB

  • memory/2872-73-0x0000000077060000-0x0000000077209000-memory.dmp

    Filesize

    1.7MB

  • memory/2916-14-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

    Filesize

    9.9MB

  • memory/2916-15-0x0000000077060000-0x0000000077209000-memory.dmp

    Filesize

    1.7MB

  • memory/2916-4-0x0000000077060000-0x0000000077209000-memory.dmp

    Filesize

    1.7MB

  • memory/2916-0-0x0000000000D20000-0x0000000000D38000-memory.dmp

    Filesize

    96KB

  • memory/2916-3-0x000000001AD50000-0x000000001ADD0000-memory.dmp

    Filesize

    512KB

  • memory/2916-2-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

    Filesize

    9.9MB