Overview

overview

10

Static

static

2421c488fb...f6.exe

windows7_x64

10

2421c488fb...f6.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    31/03/2021, 20:18

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General

  • Target
    2421c488fb9f26e44ae67e7dcf759cf6.exe
  • Size 23KB
  • Sample210331-7e5y798f96
  • SHA256 3b3877630cdc3a3aff595b6ae113a53ccd0f0d551cb87d94ef09d3115bdce9f4
  • MD5 SHA1 SHA512
Score
10/10
njratbmbmevasionpersistencetrojan

Malware Config

Extracted

Family

  • njrat

Version

  • 0.7d

Botnet

  • BMBM

C2

  • 95.211.239.203:96

Mutex

  • a9711c144e1946cfbfcab3e58d6b9213

Attributes
  • reg_key

    a9711c144e1946cfbfcab3e58d6b9213

  • 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
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 31 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2421c488fb9f26e44ae67e7dcf759cf6.exe
    "C:\Users\Admin\AppData\Local\Temp\2421c488fb9f26e44ae67e7dcf759cf6.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1900
    • C:\Users\Admin\AppData\Local\Temp\chrome.exe
      "C:\Users\Admin\AppData\Local\Temp\chrome.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1092
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\chrome.exe" "chrome.exe" ENABLE
        3⤵
          PID:1956

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/1092-9-0x0000000002170000-0x0000000002171000-memory.dmp
          Download

          memory/1092-12-0x0000000002171000-0x0000000002172000-memory.dmp
          Download

          memory/1900-2-0x0000000076271000-0x0000000076273000-memory.dmp
          Download

          memory/1900-3-0x0000000000190000-0x0000000000191000-memory.dmp
          Download