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Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    09/01/2025, 08:02

General

  • Target

    AsyncClient.exe

  • Size

    45KB

  • MD5

    ca214fb9b9396bdf7b9309f0c88c8245

  • SHA1

    2070423090e9311fdd6946fce08f7ab02eeaf97b

  • SHA256

    0a3298906b485c8e6e29be475db5774a24951c5be50c2b49b46b0f7a781a16be

  • SHA512

    244c9de86f9ae092be65d8efeb6359d862470563c1302e514cb55a18b822ef07643d86dfb2233c76b10413a51c9f56ef841a1c0ea834ebaa5ddff258e2396f66

  • SSDEEP

    768:VuPK1TVF5l6NWUtb2Hmo2qINKjPGaG6PIyzjbFgX3iK5ogMAk15BDZfx:VuPK1TV/l12NKTkDy3bCXSKfGJdfx

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

83.99.11.13:6606

83.99.11.13:7707

83.99.11.13:8808

192.168.178.1:6606

192.168.178.1:7707

192.168.178.1:8808

255.255.255.0:6606

255.255.255.0:7707

255.255.255.0:8808

192.168.178.56:6606

192.168.178.56:7707

192.168.178.56:8808

192.168.56.1:6606

192.168.56.1:7707

192.168.56.1:8808

172.29.128.1:6606

172.29.128.1:7707

172.29.128.1:8808

Mutex

HTKBgEz9kLr9

Attributes
  • delay

    3

  • install

    false

  • install_file

    virus.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Asyncrat family
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

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

  • Modifies registry class 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:2808
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:5852
    • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
      "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
      1⤵
      • Suspicious use of SetWindowsHookEx
      PID:448
    • C:\Windows\system32\BackgroundTransferHost.exe
      "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.13
      1⤵
      • Modifies registry class
      PID:3348

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\BackgroundTransferApi\6659c1ab-f014-46f4-9a08-06d98c42d1b1.down_data

      Filesize

      555KB

      MD5

      5683c0028832cae4ef93ca39c8ac5029

      SHA1

      248755e4e1db552e0b6f8651b04ca6d1b31a86fb

      SHA256

      855abd360d8a8d6974eba92b70cbd09ce519bc8773439993f9ab37cb6847309e

      SHA512

      aba434bd29be191c823b02ea9b639beb10647bbe7759bbffdaa790dfb1ec2c58d74c525ef11aacda209e4effe322d1d3a07b115446c8914b07a3bce4d8a0e2c3

    • memory/2808-0-0x0000000074FDE000-0x0000000074FDF000-memory.dmp

      Filesize

      4KB

    • memory/2808-1-0x0000000000EF0000-0x0000000000F02000-memory.dmp

      Filesize

      72KB

    • memory/2808-2-0x0000000074FD0000-0x0000000075781000-memory.dmp

      Filesize

      7.7MB

    • memory/2808-3-0x0000000074FDE000-0x0000000074FDF000-memory.dmp

      Filesize

      4KB

    • memory/2808-4-0x0000000074FD0000-0x0000000075781000-memory.dmp

      Filesize

      7.7MB