Analysis

  • max time kernel
    142s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-08-2024 06:58

General

  • Target

    2498d43b33fdf705d23a044d0704271b.exe

  • Size

    47KB

  • MD5

    2498d43b33fdf705d23a044d0704271b

  • SHA1

    79b2ee6e706d561533936cde87a46830fbfeec9b

  • SHA256

    d1ba8885bb27b8b53e8754181b474f47d0afc57ce406ca4c18edf111cbb63226

  • SHA512

    79b0ff8be1762e31c20ae5b5440958bbe652b11f219a5542d9cd2fa789c90dd5898b14be2245ae03f49c5ada54db0547df5eacc7d143f9c0ea608fb4600b4690

  • SSDEEP

    768:xuI9dTsErkZTWU/lPhmo2qbfhtE7Tb7PPIOinDpm0bR4bvYvrQWrfdxF+XaBDZMx:xuI9dTsXB2VTb7IOindpbR4DYTQEdxF6

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

thing-wine.gl.at.ply.gg:55280

Mutex

EFhpy3TPM7sR

Attributes
  • delay

    3

  • install

    true

  • install_file

    Ass.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
  • 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).

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • 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 24 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2498d43b33fdf705d23a044d0704271b.exe
    "C:\Users\Admin\AppData\Local\Temp\2498d43b33fdf705d23a044d0704271b.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1828
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Ass" /tr '"C:\Users\Admin\AppData\Local\Temp\Ass.exe"' & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4824
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Ass" /tr '"C:\Users\Admin\AppData\Local\Temp\Ass.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:1496
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp52FD.tmp.bat""
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1108
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:3008
      • C:\Users\Admin\AppData\Local\Temp\Ass.exe
        "C:\Users\Admin\AppData\Local\Temp\Ass.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:532
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4408,i,11391966286255097843,10588851088187498028,262144 --variations-seed-version --mojo-platform-channel-handle=4352 /prefetch:8
    1⤵
      PID:2356

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\Ass.exe

      Filesize

      47KB

      MD5

      2498d43b33fdf705d23a044d0704271b

      SHA1

      79b2ee6e706d561533936cde87a46830fbfeec9b

      SHA256

      d1ba8885bb27b8b53e8754181b474f47d0afc57ce406ca4c18edf111cbb63226

      SHA512

      79b0ff8be1762e31c20ae5b5440958bbe652b11f219a5542d9cd2fa789c90dd5898b14be2245ae03f49c5ada54db0547df5eacc7d143f9c0ea608fb4600b4690

    • C:\Users\Admin\AppData\Local\Temp\tmp52FD.tmp.bat

      Filesize

      150B

      MD5

      c30ae608a0266510dfd8d549d0aee2e7

      SHA1

      18d8a450b653d78ee15d578ef30154698675187d

      SHA256

      4cbc0c112d293059205656edd49ae031a54b31b4f5e3f03c4a3d7ecc0bee0b58

      SHA512

      3c808ad3c5cffde6f6d07cd6422485fba502260002c78c385341f240200384dd72c7941725f203d3e456b82797240208769bbe3235d79e2537d86ccd5a4d0c4e

    • memory/532-13-0x0000000075180000-0x0000000075930000-memory.dmp

      Filesize

      7.7MB

    • memory/532-14-0x0000000075180000-0x0000000075930000-memory.dmp

      Filesize

      7.7MB

    • memory/1828-0-0x000000007518E000-0x000000007518F000-memory.dmp

      Filesize

      4KB

    • memory/1828-1-0x0000000000490000-0x00000000004A2000-memory.dmp

      Filesize

      72KB

    • memory/1828-2-0x0000000075180000-0x0000000075930000-memory.dmp

      Filesize

      7.7MB

    • memory/1828-3-0x0000000004EA0000-0x0000000004F3C000-memory.dmp

      Filesize

      624KB

    • memory/1828-8-0x0000000075180000-0x0000000075930000-memory.dmp

      Filesize

      7.7MB