Overview

overview

10

Static

static

10

a4f62c45af...54.exe

windows7_x64

10

a4f62c45af...54.exe

windows10_x64

10

Analysis

  • max time kernel
    151s
  • max time network
    153s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    24/12/2021, 00:42

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General

  • Target
    a4f62c45af96eb8cd4ef13910fecc554.exe
  • Size 36KB
  • Sample211224-a2c59acgcl
  • SHA256 1f7971e9d98d51e7a89cb3cc698ef9f4e0be8a31790c509f75993c1e61c159d9
  • MD5 SHA1 SHA512
Score
10/10
njrathackedevasionpersistencesuricatatrojan

Malware Config

Extracted

Family

  • njrat

Version

  • im523

Botnet

  • HacKed

C2

  • bisbotbako.ddns.net:5553

Mutex

  • 96a463b52a9ece171dc1adc4c650aa32

Attributes
  • reg_key

    96a463b52a9ece171dc1adc4c650aa32

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

    trojannjrat
  • suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)

    suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)

    suricata
  • suricata: ET MALWARE njrat ver 0.7d Malware CnC Callback (Capture)

    suricata: ET MALWARE njrat ver 0.7d Malware CnC Callback (Capture)

    suricata
  • suricata: ET MALWARE njrat ver 0.7d Malware CnC Callback (Remote Desktop)

    suricata: ET MALWARE njrat ver 0.7d Malware CnC Callback (Remote Desktop)

    suricata
  • suricata: ET MALWARE njrat ver 0.7d Malware CnC Callback Response (Remote Desktop)

    suricata: ET MALWARE njrat ver 0.7d Malware CnC Callback Response (Remote Desktop)

    suricata
  • 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.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a4f62c45af96eb8cd4ef13910fecc554.exe
    "C:\Users\Admin\AppData\Local\Temp\a4f62c45af96eb8cd4ef13910fecc554.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2636
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.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:1636
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\svchost.exe" "svchost.exe" ENABLE
        3⤵
          PID:1368

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/1636-119-0x0000000002B01000-0x0000000002B02000-memory.dmp
          Download

          memory/2636-115-0x0000000002DA0000-0x0000000002DA1000-memory.dmp
          Download