| File name: | njrat |
| Full analysis: | https://app.any.run/tasks/6251d784-0d12-4357-876e-0b604baec8bf |
| 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. |
| Analysis date: | April 10, 2025, 21:53:39 |
| OS: | Windows 10 Professional (build: 19044, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/vnd.microsoft.portable-executable |
| File info: | PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows, 3 sections |
| MD5: | 51FF4831AF5DDAA3332ACD9DDCEE16D2 |
| SHA1: | BAFD31A53D4145B2CA93A2E10943C3B13B1A58B3 |
| SHA256: | C9299D0EF387E40697B170FFC6CC0D85197110260B229CAD42BF4EA79FD1B673 |
| SSDEEP: | 3072:MqGRqY7oldiIVxstW8yuLB9DYHHe/ft7qA63GldiCd:MqGRqY7oldxxpu7szy |
MALICIOUS
Create files in the Startup directory
- System.exe (PID: 6944)
NJRAT has been detected (SURICATA)
- System.exe (PID: 6944)
NjRAT is detected
- System.exe (PID: 6944)
Connects to the CnC server
- System.exe (PID: 6944)
Changes the autorun value in the registry
- System.exe (PID: 6944)
SUSPICIOUS
Reads security settings of Internet Explorer
- njrat.exe (PID: 2504)
The process creates files with name similar to system file names
- njrat.exe (PID: 2504)
Executable content was dropped or overwritten
- njrat.exe (PID: 2504)
- System.exe (PID: 6944)
Starts itself from another location
- njrat.exe (PID: 2504)
Uses NETSH.EXE to add a firewall rule or allowed programs
- System.exe (PID: 6944)
Uses TASKKILL.EXE to kill process
- System.exe (PID: 6944)
Creates file in the systems drive root
- System.exe (PID: 6944)
Connects to unusual port
- System.exe (PID: 6944)
Contacting a server suspected of hosting an CnC
- System.exe (PID: 6944)
INFO
Checks supported languages
- njrat.exe (PID: 2504)
- System.exe (PID: 6944)
Creates files or folders in the user directory
- njrat.exe (PID: 2504)
- System.exe (PID: 6944)
Reads the machine GUID from the registry
- njrat.exe (PID: 2504)
- System.exe (PID: 6944)
Reads the computer name
- njrat.exe (PID: 2504)
- System.exe (PID: 6944)
Process checks computer location settings
- njrat.exe (PID: 2504)
Reads the software policy settings
- slui.exe (PID: 2148)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
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: | 2023:02:10 17:44:16+00:00 |
| ImageFileCharacteristics: | Executable, No line numbers, No symbols, 32-bit |
| PEType: | PE32 |
| LinkerVersion: | 8 |
| CodeSize: | 109568 |
| InitializedDataSize: | 110592 |
| UninitializedDataSize: | - |
| EntryPoint: | 0x1cb6e |
| OSVersion: | 4 |
| ImageVersion: | - |
| SubsystemVersion: | 4 |
| Subsystem: | Windows GUI |
Total processes
139
Monitored processes
10
Malicious processes
2
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2148 | "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=TimerEvent | C:\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) Modules
| |||||||||||||||
| 2196 | C:\WINDOWS\system32\svchost.exe -k NetworkService -p -s Dnscache | C:\Windows\System32\svchost.exe | services.exe | ||||||||||||
User: NETWORK SERVICE Company: Microsoft Corporation Integrity Level: SYSTEM Description: Host Process for Windows Services Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 2236 | taskkill /F /IM Exsample.exe | C:\Windows\SysWOW64\taskkill.exe | — | System.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Terminates Processes Exit code: 128 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 2504 | "C:\Users\admin\AppData\Local\Temp\njrat.exe" | C:\Users\admin\AppData\Local\Temp\njrat.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 3676 | C:\WINDOWS\system32\SppExtComObj.exe -Embedding | C:\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) Modules
| |||||||||||||||
| 4208 | \??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1 | C:\Windows\System32\conhost.exe | — | taskkill.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Console Window Host Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 4988 | netsh firewall add allowedprogram "C:\Users\admin\AppData\Roaming\System.exe" "System.exe" ENABLE | C:\Windows\SysWOW64\netsh.exe | — | System.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Network Command Shell Exit code: 1 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 5360 | C:\WINDOWS\System32\slui.exe -Embedding | C:\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) Modules
| |||||||||||||||
| 6944 | "C:\Users\admin\AppData\Roaming\System.exe" | C:\Users\admin\AppData\Roaming\System.exe | njrat.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Modules
| |||||||||||||||
| 7012 | \??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1 | C:\Windows\System32\conhost.exe | — | netsh.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Console Window Host Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
Total events
4 657
Read events
4 549
Write events
108
Delete events
0
Modification events
| (PID) Process: | (2504) njrat.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer |
| Operation: | write | Name: | SlowContextMenuEntries |
Value: 6024B221EA3A6910A2DC08002B30309D0A010000BD0E0C47735D584D9CEDE91E22E23282770100000114020000000000C0000000000000468D0000006078A409B011A54DAFA526D86198A780390100009AD298B2EDA6DE11BA8CA68E55D895936E000000 | |||
| (PID) Process: | (6944) System.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run |
| Operation: | write | Name: | 5579b2618d4ca785292f47f7414a47c4 |
Value: "C:\Users\admin\AppData\Roaming\System.exe" .. | |||
Executable files
2
Suspicious files
0
Text files
0
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 2504 | njrat.exe | C:\Users\admin\AppData\Roaming\System.exe | executable | |
MD5:51FF4831AF5DDAA3332ACD9DDCEE16D2 | SHA256:C9299D0EF387E40697B170FFC6CC0D85197110260B229CAD42BF4EA79FD1B673 | |||
| 6944 | System.exe | C:\Users\admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\5579b2618d4ca785292f47f7414a47c4.exe | executable | |
MD5:51FF4831AF5DDAA3332ACD9DDCEE16D2 | SHA256:C9299D0EF387E40697B170FFC6CC0D85197110260B229CAD42BF4EA79FD1B673 | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
4
TCP/UDP connections
61
DNS requests
16
Threats
130
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
— | — | GET | 200 | 23.48.23.156:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | unknown | — | — | whitelisted |
6544 | svchost.exe | GET | 200 | 2.17.190.73:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | unknown | — | — | whitelisted |
6392 | SIHClient.exe | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl | unknown | — | — | whitelisted |
6392 | SIHClient.exe | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.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 |
|---|---|---|---|---|---|---|
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
— | — | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
— | — | 23.48.23.156:80 | crl.microsoft.com | Akamai International B.V. | DE | whitelisted |
2104 | svchost.exe | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
2112 | svchost.exe | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
3216 | svchost.exe | 172.211.123.248:443 | client.wns.windows.com | MICROSOFT-CORP-MSN-AS-BLOCK | FR | whitelisted |
6544 | svchost.exe | 40.126.31.128:443 | login.live.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
6544 | svchost.exe | 2.17.190.73:80 | ocsp.digicert.com | AKAMAI-AS | DE | whitelisted |
2104 | svchost.exe | 40.127.240.158:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
crl.microsoft.com |
| whitelisted |
google.com |
| whitelisted |
settings-win.data.microsoft.com |
| whitelisted |
client.wns.windows.com |
| whitelisted |
login.live.com |
| whitelisted |
ocsp.digicert.com |
| whitelisted |
jajaovh.duckdns.org |
| malicious |
slscr.update.microsoft.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
fe3cr.delivery.mp.microsoft.com |
| whitelisted |
Threats
PID | Process | Class | Message |
|---|---|---|---|
2196 | svchost.exe | Potentially Bad Traffic | ET DYN_DNS DYNAMIC_DNS Query to a *.duckdns .org Domain |
2196 | svchost.exe | Misc activity | ET DYN_DNS DYNAMIC_DNS Query to *.duckdns. Domain |
6944 | System.exe | Misc activity | ET INFO Possible Host Profile Exfiltration In Pipe Delimited Format |
6944 | System.exe | Malware Command and Control Activity Detected | BACKDOOR [ANY.RUN] njRAT Bladabindi CnC Communication command ll |
6944 | System.exe | Malware Command and Control Activity Detected | ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll) |
6944 | System.exe | Misc activity | ET INFO Possible Host Profile Exfiltration In Pipe Delimited Format |
6944 | System.exe | Malware Command and Control Activity Detected | BACKDOOR [ANY.RUN] njRAT Bladabindi CnC Communication command ll |
6944 | System.exe | Malware Command and Control Activity Detected | ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll) |
6944 | System.exe | Misc activity | ET INFO Possible Host Profile Exfiltration In Pipe Delimited Format |
6944 | System.exe | Malware Command and Control Activity Detected | BACKDOOR [ANY.RUN] njRAT Bladabindi CnC Communication command ll |