Analysis

  • max time kernel
    1800s
  • max time network
    1801s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/04/2024, 20:23

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
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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).

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Kills process with taskkill 1 IoCs
  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 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⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1428
    • 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:3032
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\ProgramData\COM Surrogate.exe" "COM Surrogate.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:4104
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /IM SecHealthUI.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1016
  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\Desktop\CloseEdit.vbe"
    1⤵
      PID:1120
    • C:\Windows\system32\taskmgr.exe
      "C:\Windows\system32\taskmgr.exe" /4
      1⤵
      • Checks SCSI registry key(s)
      • Modifies registry class
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:4636
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:3856

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\COM Surrogate.exe

        Filesize

        37KB

        MD5

        0c84829a79c06e88510607526990391e

        SHA1

        63970a42f5b779c1f0f8d95d493317917b0bd46d

        SHA256

        6f9b61794c9169a8860fb74e2cc0253b0bc283327b6485f799265f702a67c921

        SHA512

        85638191fee2b456e601487aff23bc5dccbfd24e74970e5f1d8fbdad633a3d31208887f682debf1fd2abcec6e36c50e74b6da30c660dfa0bc0471e7ef8c98f40

      • memory/1428-1-0x0000000074BA0000-0x0000000075151000-memory.dmp

        Filesize

        5.7MB

      • memory/1428-2-0x00000000012A0000-0x00000000012B0000-memory.dmp

        Filesize

        64KB

      • memory/1428-14-0x0000000074BA0000-0x0000000075151000-memory.dmp

        Filesize

        5.7MB

      • memory/1428-0-0x0000000074BA0000-0x0000000075151000-memory.dmp

        Filesize

        5.7MB

      • memory/3032-37-0x0000000074BA0000-0x0000000075151000-memory.dmp

        Filesize

        5.7MB

      • memory/3032-13-0x0000000001530000-0x0000000001540000-memory.dmp

        Filesize

        64KB

      • memory/3032-12-0x0000000074BA0000-0x0000000075151000-memory.dmp

        Filesize

        5.7MB

      • memory/3032-38-0x0000000001530000-0x0000000001540000-memory.dmp

        Filesize

        64KB

      • memory/4636-26-0x000002590D650000-0x000002590D651000-memory.dmp

        Filesize

        4KB

      • memory/4636-36-0x000002590D650000-0x000002590D651000-memory.dmp

        Filesize

        4KB

      • memory/4636-35-0x000002590D650000-0x000002590D651000-memory.dmp

        Filesize

        4KB

      • memory/4636-34-0x000002590D650000-0x000002590D651000-memory.dmp

        Filesize

        4KB

      • memory/4636-33-0x000002590D650000-0x000002590D651000-memory.dmp

        Filesize

        4KB

      • memory/4636-32-0x000002590D650000-0x000002590D651000-memory.dmp

        Filesize

        4KB

      • memory/4636-31-0x000002590D650000-0x000002590D651000-memory.dmp

        Filesize

        4KB

      • memory/4636-30-0x000002590D650000-0x000002590D651000-memory.dmp

        Filesize

        4KB

      • memory/4636-25-0x000002590D650000-0x000002590D651000-memory.dmp

        Filesize

        4KB

      • memory/4636-24-0x000002590D650000-0x000002590D651000-memory.dmp

        Filesize

        4KB