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Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/01/2024, 09:45

General

  • Target

    6cfd31c3c1e3a4283e684ff8b8955004.exe

  • Size

    212KB

  • MD5

    6cfd31c3c1e3a4283e684ff8b8955004

  • SHA1

    4e2f48850ff114d1c9b8b1c813b36c60dddf41a5

  • SHA256

    b409ed29c46572da5f05ff451b7eb7fb89fac88cea526b3a8ac1976341704046

  • SHA512

    c66e1b1471722636a836915efb70d128edfaf791b456eaddddec3324090c66d64d864039eebc328ccdd3ed7b3ec04197ce13adc254c1ad78012b9501ea74823a

  • SSDEEP

    3072:KJacj8v7wQ+ZGx7w8wjjP8I1IU8RjrzzvUWAOZjfKdL+YP:KJPgv7wJZ87wBjYI1IUwrIOZyhP

Malware Config

Extracted

Family

njrat

Version

0.6.4

Botnet

Hacked

C2

abdo95.ddns.net:1177

Mutex

ed6e2bf930f6d35b3ac57c049d10ac2c

Attributes
  • reg_key

    ed6e2bf930f6d35b3ac57c049d10ac2c

  • 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 2 IoCs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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 behavior: EnumeratesProcesses 48 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6cfd31c3c1e3a4283e684ff8b8955004.exe
    "C:\Users\Admin\AppData\Local\Temp\6cfd31c3c1e3a4283e684ff8b8955004.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4240
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c test.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3464
      • C:\Users\Admin\AppData\Local\Temp\test.exe
        test.exe
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:3616
        • C:\Users\Admin\AppData\Local\Temp\Explorer.exe
          "C:\Users\Admin\AppData\Local\Temp\Explorer.exe"
          4⤵
          • Drops startup file
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:5096
          • C:\Windows\SysWOW64\netsh.exe
            netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Explorer.exe" "Explorer.exe" ENABLE
            5⤵
            • Modifies Windows Firewall
            PID:4984

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    29KB

    MD5

    fc42513e45503d510fb011bbb309e51e

    SHA1

    e9741466f6e68dadb9e874f12d5b62fe14693741

    SHA256

    766240fd9026a04e4a7f20240f699133eef24a969e242afdd471ad0a179cefe3

    SHA512

    0f2a88f96a8a47abe062ccca986d2b3d98310374629c9067b19dbfeb73f23ba411b3ca5ae3877684770fb2d25947305b42c38a913a329e6220de6cd5d539a8ca

  • memory/3616-17-0x0000000075440000-0x00000000759F1000-memory.dmp

    Filesize

    5.7MB

  • memory/3616-6-0x0000000075440000-0x00000000759F1000-memory.dmp

    Filesize

    5.7MB

  • memory/3616-7-0x0000000001840000-0x0000000001850000-memory.dmp

    Filesize

    64KB

  • memory/3616-5-0x0000000075440000-0x00000000759F1000-memory.dmp

    Filesize

    5.7MB

  • memory/4240-0-0x0000000000400000-0x0000000000498000-memory.dmp

    Filesize

    608KB

  • memory/4240-21-0x0000000000400000-0x0000000000498000-memory.dmp

    Filesize

    608KB

  • memory/5096-18-0x0000000075440000-0x00000000759F1000-memory.dmp

    Filesize

    5.7MB

  • memory/5096-19-0x00000000018A0000-0x00000000018B0000-memory.dmp

    Filesize

    64KB

  • memory/5096-20-0x0000000075440000-0x00000000759F1000-memory.dmp

    Filesize

    5.7MB

  • memory/5096-23-0x00000000018A0000-0x00000000018B0000-memory.dmp

    Filesize

    64KB

  • memory/5096-24-0x0000000075440000-0x00000000759F1000-memory.dmp

    Filesize

    5.7MB

  • memory/5096-25-0x00000000018A0000-0x00000000018B0000-memory.dmp

    Filesize

    64KB

  • memory/5096-26-0x00000000018A0000-0x00000000018B0000-memory.dmp

    Filesize

    64KB