Analysis

  • max time kernel
    118s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240611-en
  • resource tags

    arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
  • submitted
    23-06-2024 22:04

General

  • Target

    WTLDR.exe

  • Size

    31KB

  • MD5

    7a94013c17dc892cea16fbae38646e43

  • SHA1

    8cf54c2ac961dd5c82cb3b07c3de317847aa94bb

  • SHA256

    cd35af0a0c71c382760409b7b2343c83857d89af55a0b365b72962f0f9c9a400

  • SHA512

    03df47db51270ca87172620e5475ce7a99e1fa1bd61e1956e4a0b28792d145b4e30d5b0d7b0737ea3ed331cecaecde78641b4828b1b9425153b1f9ac3de6f34a

  • SSDEEP

    768:jrpS7G1XB9Qzxry1vIPvQbxvKnQmIDUu0tinaj:Um6yxIQVk7j

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

windowsdefender

C2

88.168.211.65:6522

Mutex

9300538b8eb52046b545ea0eefc265d2

Attributes
  • reg_key

    9300538b8eb52046b545ea0eefc265d2

  • splitter

    Y262SUCZ4UJJ

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 2 TTPs 2 IoCs
  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\WTLDR.exe
    "C:\Users\Admin\AppData\Local\Temp\WTLDR.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2020
    • C:\Users\Admin\AppData\Local\Temp\chrome_protect.exe
      "C:\Users\Admin\AppData\Local\Temp\chrome_protect.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2064
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\chrome_protect.exe" "chrome_protect.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:2812
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall delete allowedprogram "C:\Users\Admin\AppData\Local\Temp\chrome_protect.exe"
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        PID:2756
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /c ping 0 -n 2 & del "C:\Users\Admin\AppData\Local\Temp\chrome_protect.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1960
        • C:\Windows\SysWOW64\PING.EXE
          ping 0 -n 2
          4⤵
          • Runs ping.exe
          PID:1820

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\Temp\chrome_protect.exe

    Filesize

    31KB

    MD5

    7a94013c17dc892cea16fbae38646e43

    SHA1

    8cf54c2ac961dd5c82cb3b07c3de317847aa94bb

    SHA256

    cd35af0a0c71c382760409b7b2343c83857d89af55a0b365b72962f0f9c9a400

    SHA512

    03df47db51270ca87172620e5475ce7a99e1fa1bd61e1956e4a0b28792d145b4e30d5b0d7b0737ea3ed331cecaecde78641b4828b1b9425153b1f9ac3de6f34a

  • memory/2020-0-0x0000000074651000-0x0000000074652000-memory.dmp

    Filesize

    4KB

  • memory/2020-2-0x0000000074650000-0x0000000074BFB000-memory.dmp

    Filesize

    5.7MB

  • memory/2020-1-0x0000000074650000-0x0000000074BFB000-memory.dmp

    Filesize

    5.7MB

  • memory/2020-11-0x0000000074650000-0x0000000074BFB000-memory.dmp

    Filesize

    5.7MB

  • memory/2064-12-0x0000000074650000-0x0000000074BFB000-memory.dmp

    Filesize

    5.7MB

  • memory/2064-10-0x0000000074650000-0x0000000074BFB000-memory.dmp

    Filesize

    5.7MB

  • memory/2064-13-0x0000000074650000-0x0000000074BFB000-memory.dmp

    Filesize

    5.7MB

  • memory/2064-17-0x0000000074650000-0x0000000074BFB000-memory.dmp

    Filesize

    5.7MB