Overview

overview

10

Static

static

10

Server.exe

windows11-21h2-x64

8

Server.exe

windows7-x64

10

Server.exe

windows10-2004-x64

8

Server.exe

windows10-ltsc 2021-x64

10

Server.exe

windows11-21h2-x64

8

Analysis

  • max time kernel
    300s
  • max time network
    299s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    31-10-2024 01:23

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General

  • Target

    Server.exe

  • Size

    37KB

  • MD5

    2ef7aed002ffeb3bb11459e44c8985b4

  • SHA1

    3e4962d44fe8f156883af03bf3deeac2843c73f6

  • SHA256

    3f8718b194105edc9f367fa1a4155c48fa20526c08acce53ae8456a42355d45b

  • SHA512

    bd100c451a343966dd68550b4aee49271a2452dee399570b7397e7deb17694839bcfe5812d5aa11498337dc1ce4e8fb43d89a95417d424a04f913c30207d45d0

  • SSDEEP

    384:tqETgiG1CPZfursvO6yszi7oPJoTnuTarAF+rMRTyN/0L+EcoinblneHQM3epzX0:sE/5Wpszi7o2TuWrM+rMRa8Nux4t

Score
10/10
njrathackeddiscoveryevasionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

HacKed

C2

147.185.221.20:7771

Mutex

19f90553c0dfe2ce6a1dc4098a6125bc

Attributes
  • reg_key

    19f90553c0dfe2ce6a1dc4098a6125bc

  • splitter

    |'|'|

Signatures

  • Njrat family
    njrat
  • njRAT/Bladabindi

    Widely used RAT written in .NET.

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

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Drops autorun.inf file 1 TTPs 5 IoCs

    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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

    persistenceprivilege_escalation
  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\Server.exe
    "C:\Users\Admin\AppData\Local\Temp\Server.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4980
    • C:\Users\Admin\AppData\Roaming\Steam.exe
      "C:\Users\Admin\AppData\Roaming\Steam.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops autorun.inf file
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1240
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\Steam.exe" "Steam.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:5052
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /IM Exsample.exe
        3⤵
        • System Location Discovery: System Language Discovery
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

1
T1091

Execution

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Defense Evasion

Impair Defenses

1
T1562

Disable or Modify System Firewall

1
T1562.004

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Replication Through Removable Media

1
T1091

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

    37KB

    MD5

    2ef7aed002ffeb3bb11459e44c8985b4

    SHA1

    3e4962d44fe8f156883af03bf3deeac2843c73f6

    SHA256

    3f8718b194105edc9f367fa1a4155c48fa20526c08acce53ae8456a42355d45b

    SHA512

    bd100c451a343966dd68550b4aee49271a2452dee399570b7397e7deb17694839bcfe5812d5aa11498337dc1ce4e8fb43d89a95417d424a04f913c30207d45d0

    Download Submit

  • memory/1240-7-0x0000000075000000-0x00000000755B1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1240-12-0x0000000075000000-0x00000000755B1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/4980-0-0x0000000075002000-0x0000000075003000-memory.dmp

    Filesize

    4KB

    Download

  • memory/4980-1-0x0000000075000000-0x00000000755B1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/4980-2-0x0000000075000000-0x00000000755B1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/4980-5-0x0000000075000000-0x00000000755B1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/4980-6-0x0000000075000000-0x00000000755B1000-memory.dmp

    Filesize

    5.7MB

    Download