File name:

nJack.exe

Full analysis: https://app.any.run/tasks/f0e24f43-ebbd-41ff-88f3-ccc4fa2f688d
Verdict: Malicious activity
Threats:

A backdoor is a type of cybersecurity threat that allows attackers to secretly compromise a system and conduct malicious activities, such as stealing data and modifying files. Backdoors can be difficult to detect, as they often use legitimate system applications to evade defense mechanisms. Threat actors often utilize special malware, such as PlugX, to establish backdoors on target devices.

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Analysis date: May 10, 2025, 06:19:01
OS: Windows 10 Professional (build: 19044, 64 bit)
Tags:
rat
njrat
bladabindi
auto-reg
auto-startup
remote
backdoor
Indicators:
MIME: application/vnd.microsoft.portable-executable
File info: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows, 3 sections
MD5:

733E8F1D3FA330F034295D0FD12C4894

SHA1:

34C3A4191EB07C01D3C04281DF48A209D2C18FE3

SHA256:

811D05FA4BE8D1594AE76589C38EC8D9A1B37808101392F1AEE0FC527554A049

SSDEEP:

768:Tc8DMUMiJ5Kh5yjsBbtj86wsLNdeH1cVtsnY8/oNqJ:TcAMiJ5Kh5y4BB86tU1OtsnY8QNq

ANY.RUN is an interactive service which provides full access to the guest system. Information in this report could be distorted by user actions and is provided for user acknowledgement as it is. ANY.RUN does not guarantee maliciousness or safety of the content.

  • MALICIOUS

    • NJRAT mutex has been found

      • nJack.exe (PID: 7284)
      • Dllhost.exe (PID: 7856)
      • Dllhost.exe (PID: 7992)
      • Java update.exe (PID: 8052)
      • Server.exe (PID: 4608)
      • Server.exe (PID: 6436)

    • Changes the autorun value in the registry

      • Dllhost.exe (PID: 7856)

    • Create files in the Startup directory

      • Dllhost.exe (PID: 7856)

    • Uses Task Scheduler to run other applications

      • Dllhost.exe (PID: 7856)

    • NJRAT has been detected (YARA)

      • Dllhost.exe (PID: 7856)

    • Connects to the CnC server

      • Dllhost.exe (PID: 7856)

    • NJRAT has been detected (SURICATA)

      • Dllhost.exe (PID: 7856)

  • SUSPICIOUS

    • Executable content was dropped or overwritten

      • nJack.exe (PID: 7284)
      • Dllhost.exe (PID: 7856)

    • The process creates files with name similar to system file names

      • nJack.exe (PID: 7284)

    • Reads security settings of Internet Explorer

      • nJack.exe (PID: 7284)

    • Starts itself from another location

      • nJack.exe (PID: 7284)

    • Contacting a server suspected of hosting an CnC

      • Dllhost.exe (PID: 7856)

    • The process executes via Task Scheduler

      • Server.exe (PID: 6436)
      • Server.exe (PID: 4608)

    • Connects to unusual port

      • Dllhost.exe (PID: 7856)

  • INFO

    • Reads the computer name

      • nJack.exe (PID: 7284)
      • Dllhost.exe (PID: 7856)
      • Dllhost.exe (PID: 7992)
      • Java update.exe (PID: 8052)
      • Server.exe (PID: 4608)
      • Server.exe (PID: 6436)

    • Checks supported languages

      • nJack.exe (PID: 7284)
      • Dllhost.exe (PID: 7856)
      • Java update.exe (PID: 8052)
      • Server.exe (PID: 6436)
      • Dllhost.exe (PID: 7992)
      • Server.exe (PID: 4608)

    • Create files in a temporary directory

      • nJack.exe (PID: 7284)
      • Dllhost.exe (PID: 7856)

    • Process checks computer location settings

      • nJack.exe (PID: 7284)

    • Auto-launch of the file from Registry key

      • Dllhost.exe (PID: 7856)

    • Creates files or folders in the user directory

      • Dllhost.exe (PID: 7856)

    • Manual execution by a user

      • Dllhost.exe (PID: 7992)
      • Java update.exe (PID: 8052)

    • Reads the machine GUID from the registry

      • Dllhost.exe (PID: 7856)

    • Reads the software policy settings

      • slui.exe (PID: 7400)

    • Auto-launch of the file from Startup directory

      • Dllhost.exe (PID: 7856)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report

NjRat

(PID) Process(7856) Dllhost.exe
C2213.209.150.210
Ports7773
BotnetHacKed
Options
Auto-run registry keySoftware\Microsoft\Windows\CurrentVersion\Run\Windows Update
Splitter|Hassan|
VersionNjrat 0.7 Golden By Hassan Amiri
No Malware configuration.

TRiD

.exe | Generic CIL Executable (.NET, Mono, etc.) (56.7)
.exe | Win64 Executable (generic) (21.3)
.scr | Windows screen saver (10.1)
.dll | Win32 Dynamic Link Library (generic) (5)
.exe | Win32 Executable (generic) (3.4)

EXIF

EXE

MachineType: Intel 386 or later, and compatibles
TimeStamp: 2025:05:08 12:18:00+00:00
ImageFileCharacteristics: Executable, 32-bit
PEType: PE32
LinkerVersion: 8
CodeSize: 41984
InitializedDataSize: 1536
UninitializedDataSize: -
EntryPoint: 0xc37e
OSVersion: 4
ImageVersion: -
SubsystemVersion: 4
Subsystem: Windows GUI
No data.
screenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
141
Monitored processes
11
Malicious processes
6
Suspicious processes
0

Behavior graph

Click at the process to see the details
start #NJRAT njack.exe sppextcomobj.exe no specs slui.exe #NJRAT dllhost.exe schtasks.exe no specs conhost.exe no specs #NJRAT dllhost.exe no specs #NJRAT java update.exe no specs #NJRAT server.exe no specs slui.exe no specs #NJRAT server.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
3240C:\WINDOWS\System32\slui.exe -EmbeddingC:\Windows\System32\slui.exe—svchost.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Activation Client
Version:
10.0.19041.1 (WinBuild.160101.0800)
4608"C:\Users\admin\AppData\Local\Temp/Server.exe"C:\Users\admin\AppData\Local\Temp\Server.exe
svchost.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
6436"C:\Users\admin\AppData\Local\Temp/Server.exe"C:\Users\admin\AppData\Local\Temp\Server.exe
svchost.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
7284"C:\Users\admin\AppData\Local\Temp\nJack.exe" C:\Users\admin\AppData\Local\Temp\nJack.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
7368C:\WINDOWS\system32\SppExtComObj.exe -EmbeddingC:\Windows\System32\SppExtComObj.Exe—svchost.exe
User:
NETWORK SERVICE
Company:
Microsoft Corporation
Integrity Level:
SYSTEM
Description:
KMS Connection Broker
Version:
10.0.19041.3996 (WinBuild.160101.0800)
7400"C:\WINDOWS\System32\SLUI.exe" RuleId=3482d82e-ca2c-4e1f-8864-da0267b484b2;Action=AutoActivate;AppId=55c92734-d682-4d71-983e-d6ec3f16059f;SkuId=4de7cb65-cdf1-4de9-8ae8-e3cce27b9f2c;NotificationInterval=1440;Trigger=TimerEventC:\Windows\System32\slui.exe
SppExtComObj.Exe
User:
NETWORK SERVICE
Company:
Microsoft Corporation
Integrity Level:
SYSTEM
Description:
Windows Activation Client
Version:
10.0.19041.1 (WinBuild.160101.0800)
7856"C:\Users\admin\AppData\Local\Temp\Dllhost.exe" C:\Users\admin\AppData\Local\Temp\Dllhost.exe
nJack.exe
User:
admin
Integrity Level:
MEDIUM
NjRat
(PID) Process(7856) Dllhost.exe
C2213.209.150.210
Ports7773
BotnetHacKed
Options
Auto-run registry keySoftware\Microsoft\Windows\CurrentVersion\Run\Windows Update
Splitter|Hassan|
VersionNjrat 0.7 Golden By Hassan Amiri
7928schtasks /create /sc minute /mo 1 /tn Server /tr C:\Users\admin\AppData\Local\Temp/Server.exeC:\Windows\SysWOW64\schtasks.exe—Dllhost.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Task Scheduler Configuration Tool
Exit code:
0
Version:
10.0.19041.1 (WinBuild.160101.0800)
7936\??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1C:\Windows\System32\conhost.exe—schtasks.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Console Window Host
Exit code:
0
Version:
10.0.19041.1 (WinBuild.160101.0800)
7992"C:\Users\admin\AppData\Local\Temp\Dllhost.exe" ..C:\Users\admin\AppData\Local\Temp\Dllhost.exe
explorer.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
Total events
0
Read events
0
Write events
0
Delete events
0

Modification events

No data
Executable files
3
Suspicious files
0
Text files
0
Unknown types
0

Dropped files

PID
Process
Filename
Type
7856Dllhost.exeC:\Users\admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Java update.exeexecutable
MD5:733E8F1D3FA330F034295D0FD12C4894
SHA256:811D05FA4BE8D1594AE76589C38EC8D9A1B37808101392F1AEE0FC527554A049
7284nJack.exeC:\Users\admin\AppData\Local\Temp\Dllhost.exeexecutable
MD5:733E8F1D3FA330F034295D0FD12C4894
SHA256:811D05FA4BE8D1594AE76589C38EC8D9A1B37808101392F1AEE0FC527554A049
7856Dllhost.exeC:\Users\admin\AppData\Local\Temp\Server.exeexecutable
MD5:733E8F1D3FA330F034295D0FD12C4894
SHA256:811D05FA4BE8D1594AE76589C38EC8D9A1B37808101392F1AEE0FC527554A049
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
6
TCP/UDP connections
21
DNS requests
15
Threats
4

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
—
—
GET
200
184.30.21.171:80
http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl
unknown
—
—
whitelisted
—
—
GET
200
23.48.23.156:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
—
—
whitelisted
5496
MoUsoCoreWorker.exe
GET
200
184.30.21.171:80
http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl
unknown
—
—
whitelisted
6544
svchost.exe
GET
200
2.17.190.73:80
http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D
unknown
—
—
whitelisted
5176
SIHClient.exe
GET
200
95.101.149.131:80
http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl
unknown
—
—
whitelisted
5176
SIHClient.exe
GET
200
95.101.149.131:80
http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl
unknown
—
—
whitelisted
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
—
—
51.104.136.2:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
IE
whitelisted
4
System
192.168.100.255:137
—
—
—
whitelisted
—
—
23.48.23.156:80
crl.microsoft.com
Akamai International B.V.
DE
whitelisted
—
—
184.30.21.171:80
www.microsoft.com
AKAMAI-AS
DE
whitelisted
5496
MoUsoCoreWorker.exe
184.30.21.171:80
www.microsoft.com
AKAMAI-AS
DE
whitelisted
4
System
192.168.100.255:138
—
—
—
whitelisted
3216
svchost.exe
172.211.123.249:443
client.wns.windows.com
MICROSOFT-CORP-MSN-AS-BLOCK
FR
whitelisted
6544
svchost.exe
20.190.160.67:443
login.live.com
MICROSOFT-CORP-MSN-AS-BLOCK
NL
whitelisted
6544
svchost.exe
2.17.190.73:80
ocsp.digicert.com
AKAMAI-AS
DE
whitelisted
2104
svchost.exe
51.124.78.146:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
NL
whitelisted

DNS requests

Domain
IP
Reputation
settings-win.data.microsoft.com
  • 51.104.136.2
  • 51.124.78.146
whitelisted
google.com
  • 216.58.206.46
whitelisted
crl.microsoft.com
  • 23.48.23.156
  • 23.48.23.143
whitelisted
www.microsoft.com
  • 184.30.21.171
  • 95.101.149.131
whitelisted
client.wns.windows.com
  • 172.211.123.249
whitelisted
login.live.com
  • 20.190.160.67
  • 40.126.32.72
  • 20.190.160.130
  • 20.190.160.65
  • 20.190.160.14
  • 40.126.32.136
  • 40.126.32.140
  • 20.190.160.128
whitelisted
ocsp.digicert.com
  • 2.17.190.73
whitelisted
slscr.update.microsoft.com
  • 20.12.23.50
whitelisted
fe3cr.delivery.mp.microsoft.com
  • 20.3.187.198
whitelisted
activation-v2.sls.microsoft.com
  • 40.91.76.224
whitelisted

Threats

PID
Process
Class
Message
7856
Dllhost.exe
Misc Attack
ET DROP Spamhaus DROP Listed Traffic Inbound group 57
7856
Dllhost.exe
Misc activity
ET INFO Possible Host Profile Exfiltration In Pipe Delimited Format
7856
Dllhost.exe
Malware Command and Control Activity Detected
BACKDOOR [ANY.RUN] njRAT Bladabindi CnC Communication command ll
7856
Dllhost.exe
Malware Command and Control Activity Detected
ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)
No debug info
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Reports
nJack.exe