njrat | 7aa11361505f0ea1e8bf02e1529a5104f8186da3d52f26409281f6d4783bc77f

Resubmissions

14-01-2025 07:12

250114-h1qnys1kcy 10

14-01-2025 06:19

250114-g26acsyrez 10

04-08-2022 21:27

220804-1aqkdacbdq 10

Analysis

max time kernel
28s
max time network
24s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20250113-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20250113-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
14-01-2025 06:19

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General

Target

DangerousPayload.exe
Size

37KB
MD5

9bbb2f1dc80afe6ecf27b31794a02d32
SHA1

bac66f84175fe186c478a340c2f31fde5f57d980
SHA256

7aa11361505f0ea1e8bf02e1529a5104f8186da3d52f26409281f6d4783bc77f
SHA512

341ff7add58a74c3aef78340e6c44ae05b8c8b0ba16c0d3d20a668f2923550faee171563bc8541ff0ef956002609bdda4337a484d470fca6528237bc170aac3e
SSDEEP

384:Ga5siDlT95hL5YyUvjh/xOi4aaF3ArAF+rMRTyN/0L+EcoinblneHQM3epzXGNrt:DHv5zUvjhDlaRArM+rMRa8NuM1t

Score

10^/10

njrat hacked discovery evasion persistence privilege_escalation trojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

HacKed

susiahat24199a.ddns.net:5552

Mutex

b94fe95343d85bb18dd50d099af4eb73

Attributes

reg_key
b94fe95343d85bb18dd50d099af4eb73
splitter
|'|'|

Signatures

Njrat family
njrat
njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2424	netsh.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-564748828-2201999071-3764224244-1000\Control Panel\International\Geo\Nation	DangerousPayload.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b94fe95343d85bb18dd50d099af4eb73.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b94fe95343d85bb18dd50d099af4eb73.exe	server.exe

Executes dropped EXE 1 IoCs

pid	Process
3736	server.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\b94fe95343d85bb18dd50d099af4eb73 = "\"C:\\Users\\Admin\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-564748828-2201999071-3764224244-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\b94fe95343d85bb18dd50d099af4eb73 = "\"C:\\Users\\Admin\\server.exe\" .."	server.exe

Drops autorun.inf file 1 TTPs 5 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

description	ioc	Process
File created	F:\autorun.inf	server.exe
File opened for modification	F:\autorun.inf	server.exe
File created	C:\autorun.inf	server.exe
File opened for modification	C:\autorun.inf	server.exe
File created	D:\autorun.inf	server.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

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

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DangerousPayload.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	server.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	MusNotification.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	MusNotification.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2360	taskkill.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe
3736	server.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	3736	server.exe
Token: SeDebugPrivilege	2360	taskkill.exe
Token: 33	3736	server.exe
Token: SeIncBasePriorityPrivilege	3736	server.exe
Token: SeShutdownPrivilege	5532	MusNotification.exe
Token: SeCreatePagefilePrivilege	5532	MusNotification.exe
Token: 33	3736	server.exe
Token: SeIncBasePriorityPrivilege	3736	server.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1392 wrote to memory of 3736	1392	DangerousPayload.exe	81
PID 1392 wrote to memory of 3736	1392	DangerousPayload.exe	81
PID 1392 wrote to memory of 3736	1392	DangerousPayload.exe	81
PID 3736 wrote to memory of 2424	3736	server.exe	82
PID 3736 wrote to memory of 2424	3736	server.exe	82
PID 3736 wrote to memory of 2424	3736	server.exe	82
PID 3736 wrote to memory of 2360	3736	server.exe	83
PID 3736 wrote to memory of 2360	3736	server.exe	83
PID 3736 wrote to memory of 2360	3736	server.exe	83

C:\Users\Admin\AppData\Local\Temp\DangerousPayload.exe
"C:\Users\Admin\AppData\Local\Temp\DangerousPayload.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1392
- C:\Users\Admin\server.exe
  "C:\Users\Admin\server.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 use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3736
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\server.exe" "server.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    - System Location Discovery: System Language Discovery
    PID:2424
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /F /IM System32.exe
    3⤵
    - System Location Discovery: System Language Discovery
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2360

C:\Windows\system32\MusNotification.exe
"C:\Windows\system32\MusNotification.exe"
1⤵
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
PID:5532

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

T1091

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Replication Through Removable Media

T1091

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\server.exe

Filesize
37KB

MD5
9bbb2f1dc80afe6ecf27b31794a02d32

SHA1
bac66f84175fe186c478a340c2f31fde5f57d980

SHA256
7aa11361505f0ea1e8bf02e1529a5104f8186da3d52f26409281f6d4783bc77f

SHA512
341ff7add58a74c3aef78340e6c44ae05b8c8b0ba16c0d3d20a668f2923550faee171563bc8541ff0ef956002609bdda4337a484d470fca6528237bc170aac3e

Download Submit
memory/1392-0-0x0000000074A42000-0x0000000074A43000-memory.dmp

Filesize
4KB

Download
memory/1392-1-0x0000000074A40000-0x0000000074FF1000-memory.dmp

Filesize
5.7MB

Download
memory/1392-2-0x0000000074A40000-0x0000000074FF1000-memory.dmp

Filesize
5.7MB

Download
memory/1392-6-0x0000000074A40000-0x0000000074FF1000-memory.dmp

Filesize
5.7MB

Download
memory/3736-5-0x0000000074A40000-0x0000000074FF1000-memory.dmp

Filesize
5.7MB

Download
memory/3736-7-0x0000000074A40000-0x0000000074FF1000-memory.dmp

Filesize
5.7MB

Download
memory/3736-8-0x0000000074A40000-0x0000000074FF1000-memory.dmp

Filesize
5.7MB

Download
memory/3736-13-0x0000000074A40000-0x0000000074FF1000-memory.dmp

Filesize
5.7MB

Download
memory/3736-14-0x0000000074A40000-0x0000000074FF1000-memory.dmp

Filesize
5.7MB

Download
memory/3736-15-0x0000000074A40000-0x0000000074FF1000-memory.dmp

Filesize
5.7MB

Download