Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-02-2024 22:03

General

  • Target

    a665eae243d8d987de7378c95a9e7894d95b7ca6632e7455dcb9431870e67016.exe

  • Size

    432KB

  • MD5

    ad0f6231d44f6d0e08379256a3f765c0

  • SHA1

    765c2ba3990b9c2a603a0012dfac8e34e39eda38

  • SHA256

    a665eae243d8d987de7378c95a9e7894d95b7ca6632e7455dcb9431870e67016

  • SHA512

    8bcf9c48c9137b897194cd757ff80153462ce2ad2f2d468ab70ba4479808f3a8bd99006d50a0802289de43092b7079286a86091674d0173325b50ad089309eb0

  • SSDEEP

    96:fsDYb94x6pIEYaXcwhx5zWLYxT9FS7Z0epAIb+zNt:UEb94x8pYapz1WLOxU7Z0dcY

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

2021

C2

aqq.linkpc.net:999

Mutex

a1776750d898d3976ceabc94432acfb1

Attributes
  • reg_key

    a1776750d898d3976ceabc94432acfb1

  • splitter

    |'|'|

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • 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).

  • Suspicious use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a665eae243d8d987de7378c95a9e7894d95b7ca6632e7455dcb9431870e67016.exe
    "C:\Users\Admin\AppData\Local\Temp\a665eae243d8d987de7378c95a9e7894d95b7ca6632e7455dcb9431870e67016.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3224
    • C:\Users\Admin\AppData\Roaming\System64.exe
      "C:\Users\Admin\AppData\Roaming\System64.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3756
      • C:\Windows\SYSTEM32\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\System64.exe" "System64.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:1800

Network

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Impair Defenses

1
T1562

Disable or Modify System Firewall

1
T1562.004

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Roaming\System64.exe
    Filesize

    432KB

    MD5

    ad0f6231d44f6d0e08379256a3f765c0

    SHA1

    765c2ba3990b9c2a603a0012dfac8e34e39eda38

    SHA256

    a665eae243d8d987de7378c95a9e7894d95b7ca6632e7455dcb9431870e67016

    SHA512

    8bcf9c48c9137b897194cd757ff80153462ce2ad2f2d468ab70ba4479808f3a8bd99006d50a0802289de43092b7079286a86091674d0173325b50ad089309eb0

  • memory/3224-0-0x0000000000D20000-0x0000000000D92000-memory.dmp
    Filesize

    456KB

  • memory/3224-1-0x0000000001540000-0x000000000154C000-memory.dmp
    Filesize

    48KB

  • memory/3224-2-0x00007FFC5D430000-0x00007FFC5DEF1000-memory.dmp
    Filesize

    10.8MB

  • memory/3224-15-0x00007FFC5D430000-0x00007FFC5DEF1000-memory.dmp
    Filesize

    10.8MB

  • memory/3756-16-0x00007FFC5D430000-0x00007FFC5DEF1000-memory.dmp
    Filesize

    10.8MB

  • memory/3756-17-0x000000001BC40000-0x000000001BC50000-memory.dmp
    Filesize

    64KB

  • memory/3756-18-0x00007FFC5D430000-0x00007FFC5DEF1000-memory.dmp
    Filesize

    10.8MB

  • memory/3756-19-0x000000001BC40000-0x000000001BC50000-memory.dmp
    Filesize

    64KB