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Analysis

  • max time kernel
    121s
  • max time network
    27s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    08/02/2025, 04:03

General

  • Target

    cfb9c71fc5a1fc750db82440c45ca5e1f7ef557d5ad0f1cb50dd14a2c2621b19N.exe

  • Size

    23KB

  • MD5

    4ab6caa1143a0bf110bfde47d5285ac0

  • SHA1

    afb9ceb67fcaee2beb9cd08d45018cabb7ece4bf

  • SHA256

    cfb9c71fc5a1fc750db82440c45ca5e1f7ef557d5ad0f1cb50dd14a2c2621b19

  • SHA512

    6e0bab4035120373702eb6faa77a8c4b11a3c654a3c6890a61aa6d4285cc0bb7933d2bb38772bbf4f3c590c017205d6e005a846f77cc9fab9b53dda4aeb3c4e9

  • SSDEEP

    384:07luBPiZCMfdfSJrQbsLRGSIxYVL46pg/i8BD9BmRvR6JZlbw8hqIusZzZu4:0EOmhtIiRpcnug

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

Prime

C2

updatservice3457.ddns.net:5552

Mutex

604be2a3a005846db577612359e0d347

Attributes
  • reg_key

    604be2a3a005846db577612359e0d347

  • splitter

    |'|'|

Signatures

  • Njrat family
  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 2 TTPs 1 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 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 use of AdjustPrivilegeToken 27 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cfb9c71fc5a1fc750db82440c45ca5e1f7ef557d5ad0f1cb50dd14a2c2621b19N.exe
    "C:\Users\Admin\AppData\Local\Temp\cfb9c71fc5a1fc750db82440c45ca5e1f7ef557d5ad0f1cb50dd14a2c2621b19N.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2768
    • C:\Users\Admin\AppData\Roaming\temp22.exe
      "C:\Users\Admin\AppData\Roaming\temp22.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2628
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\temp22.exe" "temp22.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:2672

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Roaming\temp22.exe

    Filesize

    23KB

    MD5

    4ab6caa1143a0bf110bfde47d5285ac0

    SHA1

    afb9ceb67fcaee2beb9cd08d45018cabb7ece4bf

    SHA256

    cfb9c71fc5a1fc750db82440c45ca5e1f7ef557d5ad0f1cb50dd14a2c2621b19

    SHA512

    6e0bab4035120373702eb6faa77a8c4b11a3c654a3c6890a61aa6d4285cc0bb7933d2bb38772bbf4f3c590c017205d6e005a846f77cc9fab9b53dda4aeb3c4e9

  • memory/2628-12-0x00000000746A0000-0x0000000074C4B000-memory.dmp

    Filesize

    5.7MB

  • memory/2628-14-0x00000000746A0000-0x0000000074C4B000-memory.dmp

    Filesize

    5.7MB

  • memory/2628-15-0x00000000746A0000-0x0000000074C4B000-memory.dmp

    Filesize

    5.7MB

  • memory/2768-0-0x00000000746A1000-0x00000000746A2000-memory.dmp

    Filesize

    4KB

  • memory/2768-1-0x00000000746A0000-0x0000000074C4B000-memory.dmp

    Filesize

    5.7MB

  • memory/2768-2-0x00000000746A0000-0x0000000074C4B000-memory.dmp

    Filesize

    5.7MB

  • memory/2768-10-0x00000000746A0000-0x0000000074C4B000-memory.dmp

    Filesize

    5.7MB

  • memory/2768-11-0x00000000746A0000-0x0000000074C4B000-memory.dmp

    Filesize

    5.7MB