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Overview

overview

10

Static

static

10

Server.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    1798s
  • max time network
    1160s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    16/11/2024, 07:38

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General

  • Target

    Server.exe

  • Size

    23KB

  • MD5

    1702a7d13a257d4d4421e07700980ab9

  • SHA1

    6400de3b12e571415b2570b8ecbf44f9ad9be9be

  • SHA256

    5449c68208969baea8135a628d27523edaad887b8f4757e29611d892881212af

  • SHA512

    a3e11b0cec2b565923aec7a0d3d210ca6d6c4c6abf6c1308e9f7712824947081d036ee82bc405c59f34f39b7adbc86487a832ac378ac8520149ecc397a52ef41

  • SSDEEP

    384:7sqS+ER6vRKXGYKRWVSujUtX9w6Dglo61Z5DVmRvR6JZlbw8hqIusZzZxlNW:Qf65K2Yf1jKRpcnuUq

Score
10/10
njratdiscoveryevasionpersistenceprivilege_escalationtrojan

Malware Config

Signatures

  • Njrat family
    njrat
  • njRAT/Bladabindi

    Widely used RAT written in .NET.

    trojannjrat
  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    persistence
  • Modifies Windows Firewall 2 TTPs 2 IoCs
    evasion
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 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 5 IoCs

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

    discovery
  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

    discovery
  • Checks SCSI registry key(s) 3 TTPs 58 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
    adwarespyware
  • Modifies registry class 43 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 38 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence
  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\Server.exe
    "C:\Users\Admin\AppData\Local\Temp\Server.exe"
    1⤵
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1968
    • C:\Windows\SysWOW64\netsh.exe
      netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Server.exe" "Server.exe" ENABLE
      2⤵
      • Modifies Windows Firewall
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:648
    • C:\Windows\SysWOW64\netsh.exe
      netsh firewall delete allowedprogram "C:\Users\Admin\AppData\Local\Temp\Server.exe"
      2⤵
      • Modifies Windows Firewall
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:4120
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 0 -n 2 & del "C:\Users\Admin\AppData\Local\Temp\Server.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • System Network Configuration Discovery: Internet Connection Discovery
      • Suspicious use of WriteProcessMemory
      PID:2440
      • C:\Windows\SysWOW64\PING.EXE
        ping 0 -n 2
        3⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Internet Connection Discovery
        • Runs ping.exe
        PID:3136
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:3004
    • C:\Windows\explorer.exe
      explorer.exe /LOADSAVEDWINDOWS
      2⤵
      • Boot or Logon Autostart Execution: Active Setup
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:4596
  • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:2660
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:4632

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2
T1547

Active Setup

1
T1547.014

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

2
T1547

Active Setup

1
T1547.014

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

3
T1112

Credential Access

Discovery

Peripheral Device Discovery

2
T1120

Query Registry

4
T1012

Remote System Discovery

1
T1018

System Information Discovery

3
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\VV0OCZTA\www.bing[1].xml
    Filesize

    17KB

    MD5

    1f2a462ccf286a707addf6406046b3c1

    SHA1

    3a2dc558150075e70eea4ad739b379e201d501f3

    SHA256

    da9fe38e169233dbbb805e614fa30171c2ecda689afc4b30f7f3c165f5f7efa9

    SHA512

    882f316c0b1de7664966fcc9d2fd053b84c9de7ca1486a10bfcc4c4c9c280a704f13f28b341822d7cde471461effa55e8cc44e8700b13eb73e094e2c0195a736

    Download Submit

  • C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\VV0OCZTA\www.bing[1].xml
    Filesize

    15KB

    MD5

    17cdebcf32b9b4acd630246ecbfda2f0

    SHA1

    c32432e5c87712d88964e05f7a63d03db4e3f781

    SHA256

    7f1b3afe1c72791ef96ac664f3fb040c623132bab7a7f76ac87dcf3fe10668e4

    SHA512

    01e08ab9dcfc6b6f8bc7766c89b48e8bd74066d300be05a9a6d7386243dd6e940ddb0b69da136965f90e914b89acd34104ecc7edd60c72e7e57b71759dd70889

    Download Submit

  • memory/1968-1-0x0000000074EC0000-0x0000000075471000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1968-2-0x0000000074EC0000-0x0000000075471000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1968-3-0x0000000074EC0000-0x0000000075471000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1968-4-0x0000000074EC0000-0x0000000075471000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1968-5-0x0000000074EC0000-0x0000000075471000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1968-6-0x0000000074EC0000-0x0000000075471000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1968-8-0x0000000074EC0000-0x0000000075471000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1968-0-0x0000000074EC1000-0x0000000074EC2000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2660-22-0x000001E83FE80000-0x000001E83FF80000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2660-146-0x000001E8740C0000-0x000001E8740E0000-memory.dmp

    Filesize

    128KB

    Download

  • memory/2660-148-0x000001E873F60000-0x000001E873F80000-memory.dmp

    Filesize

    128KB

    Download

  • memory/2660-147-0x000001E874250000-0x000001E874350000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2660-238-0x000001E877CD0000-0x000001E877DD0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2660-103-0x000001E872930000-0x000001E872A30000-memory.dmp

    Filesize

    1024KB

    Download