Analysis

  • max time kernel
    151s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/11/2022, 23:12

General

  • Target

    ec97891dc8ec0b95e004b1397a7360b7bdde2699a9369409bc10e2939b9df56d.exe

  • Size

    23KB

  • MD5

    5ff84d0c70279992ca362d19526ad195

  • SHA1

    3ab0eaaa73d68e15e3f1ca97050f117a27f9bcbc

  • SHA256

    ec97891dc8ec0b95e004b1397a7360b7bdde2699a9369409bc10e2939b9df56d

  • SHA512

    81a216074323c6c5453f72a2c2a3dc9cfa514261d2ba881b4dfdd10b1c529e8f7e339f139dfe7c2ddfd5380a5392ecf3497bb2136dd22e5523322e91921b338c

  • SSDEEP

    384:F8aLWS0dABLYVq6RxP8MDFF09vK563gRMmJKUv0mRvR6JZlbw8hqIusZzZ8kB:WXcwt3tRpcnuJg

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacKed

C2

127.0.0.1:5552

Mutex

279f6960ed84a752570aca7fb2dc1552

Attributes
  • reg_key

    279f6960ed84a752570aca7fb2dc1552

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Executes dropped EXE 1 IoCs
  • 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.

  • 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). Likely ransomware behaviour.

  • Suspicious use of AdjustPrivilegeToken 33 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ec97891dc8ec0b95e004b1397a7360b7bdde2699a9369409bc10e2939b9df56d.exe
    "C:\Users\Admin\AppData\Local\Temp\ec97891dc8ec0b95e004b1397a7360b7bdde2699a9369409bc10e2939b9df56d.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2012
    • C:\Users\Admin\AppData\Local\Temp\server.exe
      "C:\Users\Admin\AppData\Local\Temp\server.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1296
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:4224

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    23KB

    MD5

    5ff84d0c70279992ca362d19526ad195

    SHA1

    3ab0eaaa73d68e15e3f1ca97050f117a27f9bcbc

    SHA256

    ec97891dc8ec0b95e004b1397a7360b7bdde2699a9369409bc10e2939b9df56d

    SHA512

    81a216074323c6c5453f72a2c2a3dc9cfa514261d2ba881b4dfdd10b1c529e8f7e339f139dfe7c2ddfd5380a5392ecf3497bb2136dd22e5523322e91921b338c

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

    Filesize

    23KB

    MD5

    5ff84d0c70279992ca362d19526ad195

    SHA1

    3ab0eaaa73d68e15e3f1ca97050f117a27f9bcbc

    SHA256

    ec97891dc8ec0b95e004b1397a7360b7bdde2699a9369409bc10e2939b9df56d

    SHA512

    81a216074323c6c5453f72a2c2a3dc9cfa514261d2ba881b4dfdd10b1c529e8f7e339f139dfe7c2ddfd5380a5392ecf3497bb2136dd22e5523322e91921b338c

  • memory/1296-137-0x00000000754A0000-0x0000000075A51000-memory.dmp

    Filesize

    5.7MB

  • memory/1296-139-0x00000000754A0000-0x0000000075A51000-memory.dmp

    Filesize

    5.7MB

  • memory/2012-132-0x00000000754A0000-0x0000000075A51000-memory.dmp

    Filesize

    5.7MB

  • memory/2012-136-0x00000000754A0000-0x0000000075A51000-memory.dmp

    Filesize

    5.7MB