njrat | 175698d488c8b8ec03b4647a3e183be501424b2cf353ae1edb1cdc16b7f8cb3f

Analysis

max time kernel
150s
max time network
139s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
27-12-2024 12:57

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General

Target

FpsOptimizer_ByKartavik.exe
Size

93KB
MD5

0db33230bc1e881b68a31799335b53d9
SHA1

f9f8eb1b71192000916de686b76c253acd8df57d
SHA256

175698d488c8b8ec03b4647a3e183be501424b2cf353ae1edb1cdc16b7f8cb3f
SHA512

e66d40aaca03d9302df5cb1cd5ed13b63fde98fd5b063d32c84e222e1eebd3b96cfb107010bf0ea2d04466b190d2f0a248ce018528948531d78c7fb58d176f16
SSDEEP

768:YY3HepD9O/pBcxYsbae6GIXb9pDX2b9zPL0OXLeuXxrjEtCdnl2pi1Rz4Rk3wFse:neLOx6baIa9RIj00ljEwzGi1dDODpgS

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

4.tcp.eu.ngrok.io:18952

Mutex

821a5e40838230be1ba47fe894e1e9d7

Attributes

reg_key
821a5e40838230be1ba47fe894e1e9d7
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
2112	netsh.exe

Drops startup file 6 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Corporation.exe	server.exe
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\821a5e40838230be1ba47fe894e1e9d7Windows Update.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\821a5e40838230be1ba47fe894e1e9d7Windows 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

Executes dropped EXE 1 IoCs

pid	Process
2792	server.exe

Loads dropped DLL 2 IoCs

pid	Process
2612	FpsOptimizer_ByKartavik.exe
2612	FpsOptimizer_ByKartavik.exe

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

Web Service

T1102

flow	ioc
2	4.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 queried	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\NetSh	netsh.exe
Key opened	\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	FpsOptimizer_ByKartavik.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	server.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe
2792	server.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2792	server.exe

Suspicious use of AdjustPrivilegeToken 37 IoCs

description	pid	Process
Token: SeDebugPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe
Token: 33	2792	server.exe
Token: SeIncBasePriorityPrivilege	2792	server.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2612 wrote to memory of 2792	2612	FpsOptimizer_ByKartavik.exe	30
PID 2612 wrote to memory of 2792	2612	FpsOptimizer_ByKartavik.exe	30
PID 2612 wrote to memory of 2792	2612	FpsOptimizer_ByKartavik.exe	30
PID 2612 wrote to memory of 2792	2612	FpsOptimizer_ByKartavik.exe	30
PID 2792 wrote to memory of 2112	2792	server.exe	31
PID 2792 wrote to memory of 2112	2792	server.exe	31
PID 2792 wrote to memory of 2112	2792	server.exe	31
PID 2792 wrote to memory of 2112	2792	server.exe	31

C:\Users\Admin\AppData\Local\Temp\FpsOptimizer_ByKartavik.exe
"C:\Users\Admin\AppData\Local\Temp\FpsOptimizer_ByKartavik.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2612
- 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:2792
- - 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:2112

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
0db33230bc1e881b68a31799335b53d9

SHA1
f9f8eb1b71192000916de686b76c253acd8df57d

SHA256
175698d488c8b8ec03b4647a3e183be501424b2cf353ae1edb1cdc16b7f8cb3f

SHA512
e66d40aaca03d9302df5cb1cd5ed13b63fde98fd5b063d32c84e222e1eebd3b96cfb107010bf0ea2d04466b190d2f0a248ce018528948531d78c7fb58d176f16

Download Submit
memory/2612-0-0x0000000074C81000-0x0000000074C82000-memory.dmp

Filesize
4KB

Download
memory/2612-1-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download
memory/2612-2-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download
memory/2612-14-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download
memory/2792-15-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download
memory/2792-16-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download
memory/2792-52-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download
memory/2792-51-0x0000000074C80000-0x000000007522B000-memory.dmp

Filesize
5.7MB

Download