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, 12:38

General

  • Target

    KarolinaUtility.exe

  • Size

    1.1MB

  • MD5

    152b2de8e77bf9112e5eef82523ab61f

  • SHA1

    afa184a756ce657f5c39bb4c73f3e96ce859e001

  • SHA256

    f4ed03aaa253034c9e245d8194454c207ad92aee87814ef513da2ca4db4ff0a3

  • SHA512

    cac7740e857921ce7665f82c10cf1869428b5d07cf8649856639a503aa2d5efc1e1c11bc1dee9292039889b3476b648a4dd9ac8b1ebfefcafabfbda36b955a24

  • SSDEEP

    24576:pspTEK2AoTg1u6m6fBwW2lT/kQyPcwp0St1ZmF7akZmx/LWwbE7HT8GwyIFH:6pIKus8vlYQev7ydZmxDWaEP2jH

Score
10/10

Malware Config

Extracted

Family

njrat

C2

hakim32.ddns.net:2000

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 2 TTPs 3 IoCs
  • Drops startup file 6 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 17 IoCs
  • Drops file in Program Files directory 2 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 37 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\KarolinaUtility.exe
    "C:\Users\Admin\AppData\Local\Temp\KarolinaUtility.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4420
    • C:\Users\Admin\AppData\Local\Temp\server.exe
      "C:\Users\Admin\AppData\Local\Temp\server.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:5024
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:1536
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall delete allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe"
        3⤵
        • Modifies Windows Firewall
        PID:2864
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:3892

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    1.1MB

    MD5

    152b2de8e77bf9112e5eef82523ab61f

    SHA1

    afa184a756ce657f5c39bb4c73f3e96ce859e001

    SHA256

    f4ed03aaa253034c9e245d8194454c207ad92aee87814ef513da2ca4db4ff0a3

    SHA512

    cac7740e857921ce7665f82c10cf1869428b5d07cf8649856639a503aa2d5efc1e1c11bc1dee9292039889b3476b648a4dd9ac8b1ebfefcafabfbda36b955a24

  • C:\Users\Admin\AppData\Roaming\app

    Filesize

    5B

    MD5

    7eb860abfe2281298575b5216ef42bc6

    SHA1

    d4dfd7ac22dcd07da34306c40b4e5367a969cda5

    SHA256

    83d46461bf45f00cb4fc5df9679b2bd82dbf54eeb022ca1711eefb4b2e7b7689

    SHA512

    427bfc41f0514ee10d400eea38f22f6fac6f9d5ecd84ad7adb1161ff9355e47c04ff411e172fafcd23c137ad1528ed2f2cb95d247613ae5550c089633f18994d

  • memory/4420-16-0x0000000000CF0000-0x0000000001070000-memory.dmp

    Filesize

    3.5MB

  • memory/4420-2-0x00000000749E0000-0x0000000074F91000-memory.dmp

    Filesize

    5.7MB

  • memory/4420-3-0x0000000003B50000-0x0000000003B60000-memory.dmp

    Filesize

    64KB

  • memory/4420-0-0x0000000000CF0000-0x0000000001070000-memory.dmp

    Filesize

    3.5MB

  • memory/4420-17-0x00000000749E0000-0x0000000074F91000-memory.dmp

    Filesize

    5.7MB

  • memory/4420-1-0x00000000749E0000-0x0000000074F91000-memory.dmp

    Filesize

    5.7MB

  • memory/5024-13-0x0000000000790000-0x0000000000B10000-memory.dmp

    Filesize

    3.5MB

  • memory/5024-19-0x0000000003900000-0x0000000003910000-memory.dmp

    Filesize

    64KB

  • memory/5024-18-0x00000000749E0000-0x0000000074F91000-memory.dmp

    Filesize

    5.7MB

  • memory/5024-47-0x0000000000790000-0x0000000000B10000-memory.dmp

    Filesize

    3.5MB

  • memory/5024-49-0x0000000003900000-0x0000000003910000-memory.dmp

    Filesize

    64KB

  • memory/5024-48-0x00000000749E0000-0x0000000074F91000-memory.dmp

    Filesize

    5.7MB