Analysis

  • max time kernel
    148s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/01/2024, 14:47

General

  • Target

    client.exe

  • Size

    73KB

  • MD5

    25b6389bbaa746df85d53714d4a6d477

  • SHA1

    86e6443e902f180f32fb434e06ecf45d484582e3

  • SHA256

    4b02692bf468a164e333bbfc961c5974d0a95009a72ea8bff2e9cb677eae4f56

  • SHA512

    6ad22c119b548f0e8ed5adb6c9f48c33b356340a7309c8185bec817f2562ae99760ff79e131c89bce2be122b6385bee610704f37edb7f1656a1b9d4782a1fcf4

  • SSDEEP

    1536:6aUqAcxVMW7eTmJ9rxjJTkdK4WaxHdSzPMwy/eqmmRhdWVH1bfbVCNIrXQlwzUIE:6aUTcxVMW7eiJ9rxjJTkdK4WaP0PMwhq

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.2

Botnet

Default

C2

93.123.39.68:4449

Mutex

kszghixltbdczq

Attributes
  • delay

    1

  • install

    true

  • install_file

    chromeupdate.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 2 IoCs
  • 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).

  • 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 52 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.

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:3580
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "chromeupdate" /tr '"C:\Users\Admin\AppData\Roaming\chromeupdate.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2708
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "chromeupdate" /tr '"C:\Users\Admin\AppData\Roaming\chromeupdate.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:968
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8FAD.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4636
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3876
      • C:\Users\Admin\AppData\Roaming\chromeupdate.exe
        "C:\Users\Admin\AppData\Roaming\chromeupdate.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:4508

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp8FAD.tmp.bat

          Filesize

          156B

          MD5

          8bfdf7b87a8dcf50433efafb70e6b794

          SHA1

          e89a49742dc2d4bf7148f13ae600501c7386b523

          SHA256

          fe8d831850f9cfc50c6991722ea7a8552340ee3cd588252bc8f34e430d09ecba

          SHA512

          2eff1988befa3327e70d4718ecd4f0a820e6b8f3c40c041112513bdae2330bca633f2e1ebad71da2c2a4c0ad38096cc3e70f78d56d3bcf11718a43b6816faf31

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

          Filesize

          8B

          MD5

          cf759e4c5f14fe3eec41b87ed756cea8

          SHA1

          c27c796bb3c2fac929359563676f4ba1ffada1f5

          SHA256

          c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

          SHA512

          c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

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

          Filesize

          73KB

          MD5

          25b6389bbaa746df85d53714d4a6d477

          SHA1

          86e6443e902f180f32fb434e06ecf45d484582e3

          SHA256

          4b02692bf468a164e333bbfc961c5974d0a95009a72ea8bff2e9cb677eae4f56

          SHA512

          6ad22c119b548f0e8ed5adb6c9f48c33b356340a7309c8185bec817f2562ae99760ff79e131c89bce2be122b6385bee610704f37edb7f1656a1b9d4782a1fcf4

        • memory/3580-0-0x0000000000FA0000-0x0000000000FB8000-memory.dmp

          Filesize

          96KB

        • memory/3580-2-0x00007FFCAF740000-0x00007FFCB0201000-memory.dmp

          Filesize

          10.8MB

        • memory/3580-3-0x000000001BC10000-0x000000001BC20000-memory.dmp

          Filesize

          64KB

        • memory/3580-8-0x00007FFCCE090000-0x00007FFCCE285000-memory.dmp

          Filesize

          2.0MB

        • memory/3580-9-0x00007FFCAF740000-0x00007FFCB0201000-memory.dmp

          Filesize

          10.8MB

        • memory/4508-15-0x00007FFCAF740000-0x00007FFCB0201000-memory.dmp

          Filesize

          10.8MB

        • memory/4508-16-0x0000000002D60000-0x0000000002D70000-memory.dmp

          Filesize

          64KB

        • memory/4508-17-0x00007FFCAF740000-0x00007FFCB0201000-memory.dmp

          Filesize

          10.8MB

        • memory/4508-18-0x0000000002D60000-0x0000000002D70000-memory.dmp

          Filesize

          64KB