njrat | 865d9448dab0a512e40d8cf95d83cccdc9bb32806466d5ae3d2a30301f299a80

Analysis

max time kernel
150s
max time network
138s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
27-12-2024 10:41

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General

Target

Fps0ptimizer_ByKartavik.exe
Size

93KB
MD5

1a5e53bb0bcbcbb680fbb54a55a1c630
SHA1

5d420fbdfa84f3828ccbfa7ca1709edaddd22839
SHA256

865d9448dab0a512e40d8cf95d83cccdc9bb32806466d5ae3d2a30301f299a80
SHA512

1dcd0ac4af1b16770bf163060838f33fe534762d5b4e42d83c9733cdaaf827852a14f18bbccb4c802ef87f8fa3d39707a96bcc60e40e73b23043371a9537495a
SSDEEP

1536:HemC+xhUa9urgOB9mNvM4jEwzGi1dDYDLgS:HegUa9urgOidGi1dmE

Score

10^/10

njrat hacked discovery evasion persistence privilege_escalation trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacKed

hakim32.ddns.net:2000

0.tcp.eu.ngrok.io:19331

Mutex

48a41a18500fb55c8cc19095299f8b6a

Attributes

reg_key
48a41a18500fb55c8cc19095299f8b6a
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
484	netsh.exe

Drops startup file 6 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Corporation.exe	server.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\48a41a18500fb55c8cc19095299f8b6aWindows Update.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\48a41a18500fb55c8cc19095299f8b6aWindows Update.exe	server.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Explower.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Explower.exe	server.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Corporation.exe	server.exe

Executes dropped EXE 1 IoCs

pid	Process
2228	server.exe

Loads dropped DLL 2 IoCs

pid	Process
3048	Fps0ptimizer_ByKartavik.exe
3048	Fps0ptimizer_ByKartavik.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs

Web Service

T1102

flow	ioc
2	0.tcp.eu.ngrok.io

Drops autorun.inf file 1 TTPs 4 IoCs

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

Replication Through Removable Media

T1091

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

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Explower.exe	server.exe
File opened for modification	C:\Windows\SysWOW64\Explower.exe	server.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Explower.exe	server.exe
File opened for modification	C:\Program Files (x86)\Explower.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	server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Fps0ptimizer_ByKartavik.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe
2228	server.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2228	server.exe

Suspicious use of AdjustPrivilegeToken 37 IoCs

description	pid	Process
Token: SeDebugPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe
Token: 33	2228	server.exe
Token: SeIncBasePriorityPrivilege	2228	server.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3048 wrote to memory of 2228	3048	Fps0ptimizer_ByKartavik.exe	30
PID 3048 wrote to memory of 2228	3048	Fps0ptimizer_ByKartavik.exe	30
PID 3048 wrote to memory of 2228	3048	Fps0ptimizer_ByKartavik.exe	30
PID 3048 wrote to memory of 2228	3048	Fps0ptimizer_ByKartavik.exe	30
PID 2228 wrote to memory of 484	2228	server.exe	31
PID 2228 wrote to memory of 484	2228	server.exe	31
PID 2228 wrote to memory of 484	2228	server.exe	31
PID 2228 wrote to memory of 484	2228	server.exe	31

C:\Users\Admin\AppData\Local\Temp\Fps0ptimizer_ByKartavik.exe
"C:\Users\Admin\AppData\Local\Temp\Fps0ptimizer_ByKartavik.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3048
- C:\Users\Admin\AppData\Local\Temp\server.exe
  "C:\Users\Admin\AppData\Local\Temp\server.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Drops autorun.inf file
  - Drops file in System32 directory
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2228
- - 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:484

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

T1091

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

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

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Replication Through Removable Media

T1091

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\app

Filesize
5B

MD5
c60feebd511c87b86dea130692995a0f

SHA1
d64447a8b3d8949cab5a1f8d168f7c6fee6b6a0a

SHA256
632994320c04707e7ef564b3e983a694170561659552a24dfe14a922dcf0f511

SHA512
bf03fbf3329c6f7a21ecd620319ef1a6f676b22a27afd24aab546483c3fe5f6eee7bbcfdc14c5f6626957f2b96519bdd21aaea45d74a80253fa4220c8c12df7c

Download Submit
\Users\Admin\AppData\Local\Temp\server.exe

Filesize
93KB

MD5
1a5e53bb0bcbcbb680fbb54a55a1c630

SHA1
5d420fbdfa84f3828ccbfa7ca1709edaddd22839

SHA256
865d9448dab0a512e40d8cf95d83cccdc9bb32806466d5ae3d2a30301f299a80

SHA512
1dcd0ac4af1b16770bf163060838f33fe534762d5b4e42d83c9733cdaaf827852a14f18bbccb4c802ef87f8fa3d39707a96bcc60e40e73b23043371a9537495a

Download Submit
memory/2228-14-0x0000000074680000-0x0000000074C2B000-memory.dmp

Filesize
5.7MB

Download
memory/2228-16-0x0000000074680000-0x0000000074C2B000-memory.dmp

Filesize
5.7MB

Download
memory/2228-51-0x0000000074680000-0x0000000074C2B000-memory.dmp

Filesize
5.7MB

Download
memory/3048-0-0x0000000074681000-0x0000000074682000-memory.dmp

Filesize
4KB

Download
memory/3048-1-0x0000000074680000-0x0000000074C2B000-memory.dmp

Filesize
5.7MB

Download
memory/3048-2-0x0000000074680000-0x0000000074C2B000-memory.dmp

Filesize
5.7MB

Download
memory/3048-15-0x0000000074680000-0x0000000074C2B000-memory.dmp

Filesize
5.7MB

Download