Overview

overview

10

Static

static

10

4.ex.exe

windows7_x64

10

4.ex.exe

windows10_x64

10

Analysis

  • max time kernel
    152s
  • max time network
    171s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    10-09-2021 12:36

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General

  • Target

    4.ex.exe

  • Size

    23KB

  • MD5

    5a5913f5e716b5e77308de165ec9cad2

  • SHA1

    475542ce79804f08f5e46127228b48cf95d08786

  • SHA256

    cb002303aebb1d369d369c47c96a27ee5d6597ed6cf7693ad633f573da25f4cd

  • SHA512

    3e77b4cd2e7380ab3fbd61f432613c3ace3583e88d21deae14c409f20bd2fca84f2054e3cfd91ca75ecbf99829398d322425e978fa02d99c424a1d2057ae3ff5

Score
10/10
njratsystem exporerevasionpersistencetrojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

System Exporer

C2

subscribedao3001.hopto.org:3001

Mutex

ab812c7bd0447f8878bc9c41022ce9f9

Attributes
  • reg_key

    ab812c7bd0447f8878bc9c41022ce9f9

  • 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 file in Windows directory 1 IoCs
  • 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\4.ex.exe
    "C:\Users\Admin\AppData\Local\Temp\4.ex.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:1640
    • C:\Windows\System Exporer.exe
      "C:\Windows\System Exporer.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1232
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Windows\System Exporer.exe" "System Exporer.exe" ENABLE
        3⤵
          PID:1212

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Modify Existing Service

    1
    T1031

    Registry Run Keys / Startup Folder

    1
    T1060

    Privilege Escalation

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Discovery

    System Information Discovery

    1
    T1082

    Lateral Movement

    Collection

    Exfiltration

    Command and Control

    Impact

    Replay Monitor

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    Downloads

    • C:\Windows\System Exporer.exe
      MD5

      5a5913f5e716b5e77308de165ec9cad2

      SHA1

      475542ce79804f08f5e46127228b48cf95d08786

      SHA256

      cb002303aebb1d369d369c47c96a27ee5d6597ed6cf7693ad633f573da25f4cd

      SHA512

      3e77b4cd2e7380ab3fbd61f432613c3ace3583e88d21deae14c409f20bd2fca84f2054e3cfd91ca75ecbf99829398d322425e978fa02d99c424a1d2057ae3ff5

      Download Submit
    • C:\Windows\System Exporer.exe
      MD5

      5a5913f5e716b5e77308de165ec9cad2

      SHA1

      475542ce79804f08f5e46127228b48cf95d08786

      SHA256

      cb002303aebb1d369d369c47c96a27ee5d6597ed6cf7693ad633f573da25f4cd

      SHA512

      3e77b4cd2e7380ab3fbd61f432613c3ace3583e88d21deae14c409f20bd2fca84f2054e3cfd91ca75ecbf99829398d322425e978fa02d99c424a1d2057ae3ff5

      Download Submit
    • memory/1212-67-0x0000000000000000-mapping.dmp
      Download
    • memory/1232-62-0x0000000000000000-mapping.dmp
      Download
    • memory/1232-66-0x0000000000530000-0x0000000000531000-memory.dmp
      Filesize

      4KB

      Download
    • memory/1640-60-0x0000000075041000-0x0000000075043000-memory.dmp
      Filesize

      8KB

      Download
    • memory/1640-61-0x0000000000A00000-0x0000000000A01000-memory.dmp
      Filesize

      4KB

      Download