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Analysis

  • max time kernel
    150s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    27/01/2025, 10:23

General

  • Target

    Server.exe

  • Size

    93KB

  • MD5

    a9ba2416df448c5f3b36581ecfa4cd31

  • SHA1

    105592c84c83cbf4e6f7b6978ecb6d37c99440b7

  • SHA256

    b12ace477963fdde7e7b3c3b81dc01d585d87097e68bed90f5dd41077556b4bf

  • SHA512

    456ffb46cf5d914108a68292e1f9e73665e7dd3905015c76709ecc954d02b50d9dfdd758c2178791d75aa1010b7c0f2e0cf92659f2471a227497343477e6c9f3

  • SSDEEP

    768:+Y3DCdhWXxyFcxovUKUJuROprXtgN8eYhYbmXxrjEtCdnl2pi1Rz4Rk3GsGdpQgM:hCzWhIUKcuOJXPhBjEwzGi1dDiDQgS

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacKed

C2

hakim32.ddns.net:2000

127.0.0.1:5513

Mutex

67364a37f43593883a7b70eb2426799a

Attributes
  • reg_key

    67364a37f43593883a7b70eb2426799a

  • splitter

    |'|'|

Signatures

  • Njrat family
  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Disables Task Manager via registry modification
  • Modifies Windows Firewall 2 TTPs 3 IoCs
  • Drops startup file 4 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 6 IoCs
  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 9 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 37 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Server.exe
    "C:\Users\Admin\AppData\Local\Temp\Server.exe"
    1⤵
    • Drops startup file
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1856
    • C:\Windows\SysWOW64\netsh.exe
      netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Server.exe" "Server.exe" ENABLE
      2⤵
      • Modifies Windows Firewall
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:1860
    • C:\Windows\SysWOW64\netsh.exe
      netsh firewall delete allowedprogram "C:\Users\Admin\AppData\Local\Temp\Server.exe"
      2⤵
      • Modifies Windows Firewall
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:2408
    • C:\Windows\SysWOW64\netsh.exe
      netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Server.exe" "Server.exe" ENABLE
      2⤵
      • Modifies Windows Firewall
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:2416
    • C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /sc minute /mo 1 /tn StUpdate /tr C:\Users\Admin\AppData\Local\Temp/StUpdate.exe
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2444
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {9C73A20F-DCC9-44C4-92D6-87D090D3A4F2} S-1-5-21-312935884-697965778-3955649944-1000:MXQFNXLT\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3004
    • C:\Users\Admin\AppData\Local\Temp\StUpdate.exe
      C:\Users\Admin\AppData\Local\Temp/StUpdate.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:3016
    • C:\Users\Admin\AppData\Local\Temp\StUpdate.exe
      C:\Users\Admin\AppData\Local\Temp/StUpdate.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:2908

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    93KB

    MD5

    a9ba2416df448c5f3b36581ecfa4cd31

    SHA1

    105592c84c83cbf4e6f7b6978ecb6d37c99440b7

    SHA256

    b12ace477963fdde7e7b3c3b81dc01d585d87097e68bed90f5dd41077556b4bf

    SHA512

    456ffb46cf5d914108a68292e1f9e73665e7dd3905015c76709ecc954d02b50d9dfdd758c2178791d75aa1010b7c0f2e0cf92659f2471a227497343477e6c9f3

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

    Filesize

    5B

    MD5

    c60feebd511c87b86dea130692995a0f

    SHA1

    d64447a8b3d8949cab5a1f8d168f7c6fee6b6a0a

    SHA256

    632994320c04707e7ef564b3e983a694170561659552a24dfe14a922dcf0f511

    SHA512

    bf03fbf3329c6f7a21ecd620319ef1a6f676b22a27afd24aab546483c3fe5f6eee7bbcfdc14c5f6626957f2b96519bdd21aaea45d74a80253fa4220c8c12df7c

  • memory/1856-0-0x00000000741C1000-0x00000000741C2000-memory.dmp

    Filesize

    4KB

  • memory/1856-1-0x00000000741C0000-0x000000007476B000-memory.dmp

    Filesize

    5.7MB

  • memory/1856-2-0x00000000741C0000-0x000000007476B000-memory.dmp

    Filesize

    5.7MB

  • memory/1856-8-0x00000000741C0000-0x000000007476B000-memory.dmp

    Filesize

    5.7MB