Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    17-12-2024 14:43

General

  • Target

    d6471589756f94a0908a7ec9f0e0e98149882ce6c1cf3da9852dc88fcc3d513d.exe

  • Size

    37KB

  • MD5

    4699bec8cd50aa7f2cecf0df8f0c26a0

  • SHA1

    c7c6c85fc26189cf4c68d45b5f8009a7a456497d

  • SHA256

    d6471589756f94a0908a7ec9f0e0e98149882ce6c1cf3da9852dc88fcc3d513d

  • SHA512

    5701a107e8af1c89574274c8b585ddd87ae88332284fc18090bbcccf5d11b65486ccf70450d4451fec7c75474a62518dd3c5e2bedda98487085276ac51d7ac0e

  • SSDEEP

    768:HXGD2mUbCv/cPDYjM/cA8rM+rMRa8NuEx2t:H2DSbW0rEMUAP+gRJNbx

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

school

C2

167.71.56.116:22764

Mutex

872de6721af0b6833a743205be97e089

Attributes
  • reg_key

    872de6721af0b6833a743205be97e089

  • splitter

    |'|'|

Signatures

  • Njrat family
  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 2 TTPs 1 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.

  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 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 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d6471589756f94a0908a7ec9f0e0e98149882ce6c1cf3da9852dc88fcc3d513d.exe
    "C:\Users\Admin\AppData\Local\Temp\d6471589756f94a0908a7ec9f0e0e98149882ce6c1cf3da9852dc88fcc3d513d.exe"
    1⤵
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2536
    • C:\Windows\rundll32.exe
      "C:\Windows\rundll32.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops autorun.inf file
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2332
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Windows\rundll32.exe" "rundll32.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:2132

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\rundll32.exe

    Filesize

    37KB

    MD5

    4699bec8cd50aa7f2cecf0df8f0c26a0

    SHA1

    c7c6c85fc26189cf4c68d45b5f8009a7a456497d

    SHA256

    d6471589756f94a0908a7ec9f0e0e98149882ce6c1cf3da9852dc88fcc3d513d

    SHA512

    5701a107e8af1c89574274c8b585ddd87ae88332284fc18090bbcccf5d11b65486ccf70450d4451fec7c75474a62518dd3c5e2bedda98487085276ac51d7ac0e

  • memory/2332-10-0x00000000742E0000-0x000000007488B000-memory.dmp

    Filesize

    5.7MB

  • memory/2332-11-0x00000000742E0000-0x000000007488B000-memory.dmp

    Filesize

    5.7MB

  • memory/2332-20-0x00000000742E0000-0x000000007488B000-memory.dmp

    Filesize

    5.7MB

  • memory/2536-0-0x00000000742E1000-0x00000000742E2000-memory.dmp

    Filesize

    4KB

  • memory/2536-1-0x00000000742E0000-0x000000007488B000-memory.dmp

    Filesize

    5.7MB

  • memory/2536-2-0x00000000742E0000-0x000000007488B000-memory.dmp

    Filesize

    5.7MB

  • memory/2536-9-0x00000000742E0000-0x000000007488B000-memory.dmp

    Filesize

    5.7MB