Overview

overview

10

Static

static

10

a64e20b953...56.exe

windows7_x64

10

a64e20b953...56.exe

windows10_x64

10

Analysis

  • max time kernel
    151s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    26-12-2021 03:02

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General

  • Target

    a64e20b9532a8657759de7b8a59ade56.exe

  • Size

    37KB

  • MD5

    a64e20b9532a8657759de7b8a59ade56

  • SHA1

    a2a7ac6eee62c39d1f7af01a0ec5d9fd3303b32d

  • SHA256

    ab4d6a82cafc92825a0b88183325855f0c44920da970b42c949d5d5ffdcc0585

  • SHA512

    e5280a5982fe95c0d118fe56271ecb64f7453b2d5ee2b993bedb725eea7eae01ee535773d98ef128723d3f90fdadab051302eb8d1447431181e6f95fcae473a1

Score
10/10
njratfffevasionpersistencetrojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

FFF

C2

8.tcp.ngrok.io:11308

Mutex

6f7a15d185b84f9da2e68b7b97fe916f

Attributes
  • reg_key

    6f7a15d185b84f9da2e68b7b97fe916f

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

    trojannjrat
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
    evasion
  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Drops autorun.inf file 1 TTPs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 34 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a64e20b9532a8657759de7b8a59ade56.exe
    "C:\Users\Admin\AppData\Local\Temp\a64e20b9532a8657759de7b8a59ade56.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2740
    • C:\Users\Admin\AppData\Local\Temp\Runtime Broker.exe
      "C:\Users\Admin\AppData\Local\Temp\Runtime Broker.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1840
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Runtime Broker.exe" "Runtime Broker.exe" ENABLE
        3⤵
          PID:3692
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /F /IM taskmgr.exe
          3⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:2440

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\Runtime Broker.exe
      MD5

      a64e20b9532a8657759de7b8a59ade56

      SHA1

      a2a7ac6eee62c39d1f7af01a0ec5d9fd3303b32d

      SHA256

      ab4d6a82cafc92825a0b88183325855f0c44920da970b42c949d5d5ffdcc0585

      SHA512

      e5280a5982fe95c0d118fe56271ecb64f7453b2d5ee2b993bedb725eea7eae01ee535773d98ef128723d3f90fdadab051302eb8d1447431181e6f95fcae473a1

      Download Submit

    • C:\Users\Admin\AppData\Local\Temp\Runtime Broker.exe
      MD5

      a64e20b9532a8657759de7b8a59ade56

      SHA1

      a2a7ac6eee62c39d1f7af01a0ec5d9fd3303b32d

      SHA256

      ab4d6a82cafc92825a0b88183325855f0c44920da970b42c949d5d5ffdcc0585

      SHA512

      e5280a5982fe95c0d118fe56271ecb64f7453b2d5ee2b993bedb725eea7eae01ee535773d98ef128723d3f90fdadab051302eb8d1447431181e6f95fcae473a1

      Download Submit

    • memory/1840-116-0x0000000000000000-mapping.dmp

      Download

    • memory/1840-119-0x00000000025A0000-0x00000000025A1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/2440-121-0x0000000000000000-mapping.dmp

      Download

    • memory/2740-115-0x0000000002480000-0x0000000002481000-memory.dmp

      Filesize

      4KB

      Download

    • memory/3692-120-0x0000000000000000-mapping.dmp

      Download