njrat | f5c542679e18756fcaaf434a1df9ecee261c8fa6788b75dc64c458e4eef15f2d

Analysis

max time kernel
899s
max time network
896s
platform
windows11-21h2_x64
resource
win11-20250210-en
resource tags

arch:x64arch:x86image:win11-20250210-enlocale:en-usos:windows11-21h2-x64system
submitted
10-02-2025 13:43

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General

Target

lmlmdos.exe
Size

23KB
MD5

5eb67cac2f9ef8a548ba327896909cda
SHA1

b8f3612f2d00c581387b02a615ad178874b51329
SHA256

f5c542679e18756fcaaf434a1df9ecee261c8fa6788b75dc64c458e4eef15f2d
SHA512

40665518a5451f7bd86ca1e3ad58cec178566c0f45fde647e76c2bb8d81611ca61fe1974cb97988065239005ca63fc9de0c449d45357ee90a8a99ccd30a5415f
SSDEEP

384:XweXCQIreJig/8Z7SS1fEBpng6tgL2IBPZVmRvR6JZlbw8hqIusZzZQy:oLq411eRpcnuI

Score

10^/10

njrat defense_evasion discovery persistence privilege_escalation trojan

Malware Config

Signatures

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

Modifies Windows Firewall 2 TTPs 1 IoCs

defense_evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
4288	netsh.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\052a8691abcf06ff30b5f4c68922a91f.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\052a8691abcf06ff30b5f4c68922a91f.exe	server.exe

Executes dropped EXE 1 IoCs

pid	Process
1684	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\USER\S-1-5-21-1505343591-821288467-4101320450-1000\Software\Microsoft\Windows\CurrentVersion\Run\052a8691abcf06ff30b5f4c68922a91f = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\052a8691abcf06ff30b5f4c68922a91f = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	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 3 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	lmlmdos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	server.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1684	server.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe
Token: SeIncBasePriorityPrivilege	1684	server.exe
Token: 33	1684	server.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3952 wrote to memory of 1684	3952	lmlmdos.exe	85
PID 3952 wrote to memory of 1684	3952	lmlmdos.exe	85
PID 3952 wrote to memory of 1684	3952	lmlmdos.exe	85
PID 1684 wrote to memory of 4288	1684	server.exe	86
PID 1684 wrote to memory of 4288	1684	server.exe	86
PID 1684 wrote to memory of 4288	1684	server.exe	86

C:\Users\Admin\AppData\Local\Temp\lmlmdos.exe
"C:\Users\Admin\AppData\Local\Temp\lmlmdos.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3952
- C:\Users\Admin\AppData\Local\Temp\server.exe
  "C:\Users\Admin\AppData\Local\Temp\server.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1684
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    - System Location Discovery: System Language Discovery
    PID:4288

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

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

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\server.exe

Filesize
23KB

MD5
5eb67cac2f9ef8a548ba327896909cda

SHA1
b8f3612f2d00c581387b02a615ad178874b51329

SHA256
f5c542679e18756fcaaf434a1df9ecee261c8fa6788b75dc64c458e4eef15f2d

SHA512
40665518a5451f7bd86ca1e3ad58cec178566c0f45fde647e76c2bb8d81611ca61fe1974cb97988065239005ca63fc9de0c449d45357ee90a8a99ccd30a5415f

Download Submit
memory/1684-12-0x0000000073CD0000-0x0000000074281000-memory.dmp

Filesize
5.7MB

Download
memory/1684-14-0x0000000073CD0000-0x0000000074281000-memory.dmp

Filesize
5.7MB

Download
memory/1684-16-0x0000000073CD0000-0x0000000074281000-memory.dmp

Filesize
5.7MB

Download
memory/1684-17-0x0000000073CD0000-0x0000000074281000-memory.dmp

Filesize
5.7MB

Download
memory/1684-18-0x0000000073CD0000-0x0000000074281000-memory.dmp

Filesize
5.7MB

Download
memory/3952-0-0x0000000073CD1000-0x0000000073CD2000-memory.dmp

Filesize
4KB

Download
memory/3952-1-0x0000000073CD0000-0x0000000074281000-memory.dmp

Filesize
5.7MB

Download
memory/3952-2-0x0000000073CD0000-0x0000000074281000-memory.dmp

Filesize
5.7MB

Download
memory/3952-13-0x0000000073CD0000-0x0000000074281000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads