Analysis

  • max time kernel
    1800s
  • max time network
    1798s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    27/04/2024, 21:44

General

  • Target

    Client.exe

  • Size

    159KB

  • MD5

    6173cb7d0e9d8ede7a5ad7171fd0ea1f

  • SHA1

    e77594390afca93d09bdaab83c0a54971a2d9657

  • SHA256

    c6f5ebf11c73827e6899efef78e6ac8d52331ef6cf2a3feea1cad043dbfa82de

  • SHA512

    6dbf672824062a194b93ce904634a89d14dc7122cba0581ecda5d0d6b6531a63b16f6ca040235864eaa4faf8487c7d621af056d3707c27e0474055af207d9227

  • SSDEEP

    3072:y/4q4thMdRZ6YIlzZo2e0xxYWV2txhtBhd1BAAw8KHhEO3rJk:iRZ6YsZneUzghtrBAnyO9

Malware Config

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client.exe
    "C:\Users\Admin\AppData\Local\Temp\Client.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2788
    • C:\Windows\COM Surrogate.exe
      "C:\Windows\COM Surrogate.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:468
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Windows\COM Surrogate.exe" "COM Surrogate.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:1556
  • C:\Tools.exe
    "C:\Tools.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4924
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
    1⤵
      PID:4904

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Windows\COM Surrogate.exe

      Filesize

      159KB

      MD5

      6173cb7d0e9d8ede7a5ad7171fd0ea1f

      SHA1

      e77594390afca93d09bdaab83c0a54971a2d9657

      SHA256

      c6f5ebf11c73827e6899efef78e6ac8d52331ef6cf2a3feea1cad043dbfa82de

      SHA512

      6dbf672824062a194b93ce904634a89d14dc7122cba0581ecda5d0d6b6531a63b16f6ca040235864eaa4faf8487c7d621af056d3707c27e0474055af207d9227

    • memory/468-15-0x0000000000890000-0x00000000008A0000-memory.dmp

      Filesize

      64KB

    • memory/468-17-0x00000000750D0000-0x0000000075681000-memory.dmp

      Filesize

      5.7MB

    • memory/468-14-0x00000000750D0000-0x0000000075681000-memory.dmp

      Filesize

      5.7MB

    • memory/468-19-0x00000000750D0000-0x0000000075681000-memory.dmp

      Filesize

      5.7MB

    • memory/468-20-0x0000000000890000-0x00000000008A0000-memory.dmp

      Filesize

      64KB

    • memory/468-21-0x00000000750D0000-0x0000000075681000-memory.dmp

      Filesize

      5.7MB

    • memory/468-22-0x0000000000890000-0x00000000008A0000-memory.dmp

      Filesize

      64KB

    • memory/468-26-0x0000000000890000-0x00000000008A0000-memory.dmp

      Filesize

      64KB

    • memory/2788-2-0x00000000750D0000-0x0000000075681000-memory.dmp

      Filesize

      5.7MB

    • memory/2788-1-0x0000000000AE0000-0x0000000000AF0000-memory.dmp

      Filesize

      64KB

    • memory/2788-16-0x00000000750D0000-0x0000000075681000-memory.dmp

      Filesize

      5.7MB

    • memory/2788-0-0x00000000750D0000-0x0000000075681000-memory.dmp

      Filesize

      5.7MB