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Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/01/2024, 04:23

General

  • Target

    6c579929873c53c8aeac1eec5fd9cd43.exe

  • Size

    40KB

  • MD5

    6c579929873c53c8aeac1eec5fd9cd43

  • SHA1

    dd1bb4131e623621167f7787e502901b3dc290e7

  • SHA256

    ca1cfa6d6fbad23c5096a460c845a4426eda5895b24db04b562253d29332e866

  • SHA512

    7f9707963f6a27fb13329f705664749bf68905d5d12dbb2c546d425520c65a41cd1e82f894ff3c805c46b97de01126e2cd12b452ee9beffa232ec32e540bba28

  • SSDEEP

    768:ohaBfpq3Q+FpWCvSO9qO37Z7duyJS2IrW2w88WkKeH:oUeA+FpHjqO3t7duwS2f889KeH

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacKed

C2

winfix.ddns.net:2655

Mutex

c544fdd3a27573c904e8127ab07c610e

Attributes
  • reg_key

    c544fdd3a27573c904e8127ab07c610e

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 1 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
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6c579929873c53c8aeac1eec5fd9cd43.exe
    "C:\Users\Admin\AppData\Local\Temp\6c579929873c53c8aeac1eec5fd9cd43.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4884
    • C:\Users\Admin\AppData\Local\Temp\winhelper.exe
      "C:\Users\Admin\AppData\Local\Temp\winhelper.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3764
      • C:\Windows\SYSTEM32\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\winhelper.exe" "winhelper.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:1464

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    40KB

    MD5

    6c579929873c53c8aeac1eec5fd9cd43

    SHA1

    dd1bb4131e623621167f7787e502901b3dc290e7

    SHA256

    ca1cfa6d6fbad23c5096a460c845a4426eda5895b24db04b562253d29332e866

    SHA512

    7f9707963f6a27fb13329f705664749bf68905d5d12dbb2c546d425520c65a41cd1e82f894ff3c805c46b97de01126e2cd12b452ee9beffa232ec32e540bba28

  • memory/3764-23-0x00007FFE7AFC0000-0x00007FFE7B961000-memory.dmp

    Filesize

    9.6MB

  • memory/3764-22-0x0000000000A70000-0x0000000000A80000-memory.dmp

    Filesize

    64KB

  • memory/3764-28-0x0000000000A70000-0x0000000000A80000-memory.dmp

    Filesize

    64KB

  • memory/3764-27-0x0000000000A70000-0x0000000000A80000-memory.dmp

    Filesize

    64KB

  • memory/3764-26-0x00007FFE7AFC0000-0x00007FFE7B961000-memory.dmp

    Filesize

    9.6MB

  • memory/3764-25-0x0000000000A70000-0x0000000000A80000-memory.dmp

    Filesize

    64KB

  • memory/3764-21-0x00007FFE7AFC0000-0x00007FFE7B961000-memory.dmp

    Filesize

    9.6MB

  • memory/4884-2-0x00000000010E0000-0x000000000117C000-memory.dmp

    Filesize

    624KB

  • memory/4884-20-0x00007FFE7AFC0000-0x00007FFE7B961000-memory.dmp

    Filesize

    9.6MB

  • memory/4884-0-0x00007FFE7AFC0000-0x00007FFE7B961000-memory.dmp

    Filesize

    9.6MB

  • memory/4884-7-0x000000001D130000-0x000000001D1D6000-memory.dmp

    Filesize

    664KB

  • memory/4884-1-0x000000001BB60000-0x000000001C02E000-memory.dmp

    Filesize

    4.8MB

  • memory/4884-6-0x0000000001180000-0x000000000118C000-memory.dmp

    Filesize

    48KB

  • memory/4884-5-0x0000000000EC0000-0x0000000000EC8000-memory.dmp

    Filesize

    32KB

  • memory/4884-4-0x00000000010D0000-0x00000000010E0000-memory.dmp

    Filesize

    64KB

  • memory/4884-3-0x00007FFE7AFC0000-0x00007FFE7B961000-memory.dmp

    Filesize

    9.6MB