Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    28/04/2024, 21:43

General

  • Target

    CompatibilityCheck.exe

  • Size

    37KB

  • MD5

    0c84829a79c06e88510607526990391e

  • SHA1

    63970a42f5b779c1f0f8d95d493317917b0bd46d

  • SHA256

    6f9b61794c9169a8860fb74e2cc0253b0bc283327b6485f799265f702a67c921

  • SHA512

    85638191fee2b456e601487aff23bc5dccbfd24e74970e5f1d8fbdad633a3d31208887f682debf1fd2abcec6e36c50e74b6da30c660dfa0bc0471e7ef8c98f40

  • SSDEEP

    384:p6hCpb2iKrL4y4Oo49qylTKbWstSXHasW4TkrAF+rMRTyN/0L+EcoinblneHQM3Y:oCdi/s89ZlTKtSK94YrM+rMRa8NuS2t

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

I am Furry

C2

green-morrison.gl.at.ply.gg:17455

Mutex

e14109296e01cf24bb9b7f72f64c4cb3

Attributes
  • reg_key

    e14109296e01cf24bb9b7f72f64c4cb3

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops autorun.inf file 1 TTPs 5 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 36 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\CompatibilityCheck.exe
    "C:\Users\Admin\AppData\Local\Temp\CompatibilityCheck.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3068
    • C:\ProgramData\COM Surrogate.exe
      "C:\ProgramData\COM Surrogate.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops autorun.inf file
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3916
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\ProgramData\COM Surrogate.exe" "COM Surrogate.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:2308
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /IM SecHealthUI.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3260

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\COM Surrogate.exe

    Filesize

    37KB

    MD5

    0c84829a79c06e88510607526990391e

    SHA1

    63970a42f5b779c1f0f8d95d493317917b0bd46d

    SHA256

    6f9b61794c9169a8860fb74e2cc0253b0bc283327b6485f799265f702a67c921

    SHA512

    85638191fee2b456e601487aff23bc5dccbfd24e74970e5f1d8fbdad633a3d31208887f682debf1fd2abcec6e36c50e74b6da30c660dfa0bc0471e7ef8c98f40

  • memory/3068-0-0x0000000074520000-0x0000000074AD1000-memory.dmp

    Filesize

    5.7MB

  • memory/3068-1-0x0000000000D00000-0x0000000000D10000-memory.dmp

    Filesize

    64KB

  • memory/3068-2-0x0000000074520000-0x0000000074AD1000-memory.dmp

    Filesize

    5.7MB

  • memory/3068-12-0x0000000074520000-0x0000000074AD1000-memory.dmp

    Filesize

    5.7MB

  • memory/3916-14-0x0000000001370000-0x0000000001380000-memory.dmp

    Filesize

    64KB

  • memory/3916-13-0x0000000074520000-0x0000000074AD1000-memory.dmp

    Filesize

    5.7MB

  • memory/3916-24-0x0000000074520000-0x0000000074AD1000-memory.dmp

    Filesize

    5.7MB

  • memory/3916-25-0x0000000001370000-0x0000000001380000-memory.dmp

    Filesize

    64KB