MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef5c02c221b5cb992728758e29195115a8f5481cf9ca5072a0616f95d00a362c. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


njrat


Vendor detections: 17


Intelligence 17 IOCs YARA 20 File information Comments
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SHA256 hash: ef5c02c221b5cb992728758e29195115a8f5481cf9ca5072a0616f95d00a362c
SHA3-384 hash: 8428af029b632cf0009fac2add7484f61ac072284cc946ed474fc67c96971a642eceb0e53a43abfcba12912ea0f9db2c
SHA1 hash: e2febca085bd5f5ac9aa2313bab17b4565a4024b
MD5 hash: 475813f4cabffe076aefbd618a982512
humanhash: quebec-magnesium-blue-xray
File name:5556.rar
Download: download sample
Signature njrat
Create hunting rule
File size:24'064 bytes
First seen:2024-12-16 06:20:06 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'934 x AgentTesla, 19'824 x Formbook, 12'310 x SnakeKeylogger)
ssdeep 384:hFHuitNFzA0yUVky2n0Yxga06agwXh/+f1mRvR6JZlbw8hqIusZzZZa:a6F2RNnB+Rpcnuj
Threatray 471 similar samples on MalwareBazaar
TLSH T1C3B2190E3F698856C5BC167486B5965003B5D1870413EE2FCDC960CBAFB3AD92D8CAF9
TrID 66.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.5% (.EXE) Win64 Executable (generic) (10522/11/4)
5.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.5% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.0% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
Reporter lontze7
Tags:exe NjRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
405
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
njrat
Create hunting rule
ID:
1
File name:
5556.rar.exe
Verdict:
Malicious activity
Analysis date:
2024-10-20 19:18:11 UTC
Tags:
njrat
Link:
https://app.any.run/tasks/cedaf62b-dcfb-462a-837a-689905459e67

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Packed.Generic-9795615-0
Create hunting rule

Win.Packed.Generic-9795616-0
Create hunting rule

Win.Dropper.njRAT-10015886-0
Create hunting rule

Win.Dropper.Nanocore-10030076-0
Create hunting rule

Win.Trojan.Generic-6417450-0
Create hunting rule

Win.Trojan.Generic-6454614-0
Create hunting rule

Win.Trojan.Generic-6454615-0
Create hunting rule

Win.Packed.Bladabindi-6804148-0
Create hunting rule

Win.Trojan.B-468
Create hunting rule

Win.Trojan.Ratenjay-1
Create hunting rule

Win.Trojan.Bladabindi-6192388-0
Create hunting rule

Win.Packed.Bladabindi-6917466-0
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=675fc9938fb73f13afcc6a13
Tags:
bladabindi autorun njrat
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a file in the %AppData% directory
Creating a process from a recently created file
Creating a file
Creating a process with a hidden window
Creating a window
Searching for synchronization primitives
Connection attempt
Unauthorized injection to a recently created process
Launching the process to change the firewall settings
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
bladabindi cmd fingerprint keylogger lolbin masquerade netsh njrat rat vbnet windows
Link:
https://www.filescan.io/uploads/675fc6cf23487cdf2948947a/reports/f512c2f4-85e0-472c-9739-220733ac3475/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/ef5c02c221b5cb992728758e29195115a8f5481cf9ca5072a0616f95d00a362c
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/57635788-a95d-4297-a362-edf80225eb88
Result
Threat name:
Njrat
Create hunting rule
Detection:
malicious
Classification:
phis.troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1575638
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Contains functionality to log keystrokes (.Net Source)
Creates autostart registry keys with suspicious names
Disables zone checking for all users
Drops PE files to the startup folder
Drops PE files with benign system names
Found malware configuration
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Modifies the windows firewall
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Protects its processes via BreakOnTermination flag
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: System File Execution Location Anomaly
Sigma detected: Windows Binaries Write Suspicious Extensions
Suricata IDS alerts for network traffic
Uses an obfuscated file name to hide its real file extension (double extension)
Uses netsh to modify the Windows network and firewall settings
Yara detected Njrat
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1575638 Sample: 5556.rar.exe Startdate: 16/12/2024 Architecture: WINDOWS Score: 100 35 Suricata IDS alerts for network traffic 2->35 37 Found malware configuration 2->37 39 Malicious sample detected (through community Yara rule) 2->39 41 16 other signatures 2->41 8 5556.rar.exe 1 5 2->8         started        12 lsass.exe 2 2->12         started        14 lsass.exe 3 2->14         started        16 lsass.exe 2 2->16         started        process3 file4 29 C:\Users\user\AppData\Roaming\lsass.exe, PE32 8->29 dropped 31 C:\Users\user\AppData\...\5556.rar.exe.log, ASCII 8->31 dropped 51 Drops PE files with benign system names 8->51 18 lsass.exe 4 5 8->18         started        signatures5 process6 dnsIp7 33 188.212.158.75, 49735, 49738, 49739 DIALTELECOMRO Romania 18->33 27 C:\...\e67ceec44f16fc357df593d15ca3e96b.exe, PE32 18->27 dropped 43 Antivirus detection for dropped file 18->43 45 Multi AV Scanner detection for dropped file 18->45 47 Protects its processes via BreakOnTermination flag 18->47 49 6 other signatures 18->49 23 netsh.exe 2 18->23         started        file8 signatures9 process10 process11 25 conhost.exe 23->25         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/ef5c02c221b5cb992728758e29195115a8f5481cf9ca5072a0616f95d00a362c
Detection:
njrat
Create hunting rule
Link:
https://mwdb.cert.pl/sample/ef5c02c221b5cb992728758e29195115a8f5481cf9ca5072a0616f95d00a362c/
Threat name:
ByteCode-MSIL.Backdoor.njRAT
Create hunting rule
Status:
Malicious
First seen:
2024-08-02 12:50:00 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
36 of 38 (94.74%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=55oafqrbwxfzsjziowhcsgkrcwupksa47hffa4vamfxzluakgywa._file
Verdict:
malicious
Label(s):
njrat
Create hunting rule
Similar samples:
38659eb58db3cb2d95448a7a3fa9049c58af36c21ad675843fb6932de827426b
njrat
798e0870efbf28e90fb48671e8ef55bb9b442602cc505522a991153d79f2bfaf
njrat
7dcaef0a3442fdb263af59d4af0cd67cc08f61c04db6bdbfaf6609b478a52e1c
njrat
ccd5489042e837a771f04a06fc5296535c2fff338e4d7b6d0585f446f2b0ba6b
njrat
fa448e36486c632887c7c71e09596263ecefd1531f7977c7bb08471f08be8275
njrat
fc2631c62f5aadf52a4f83289493d04a5ab8a108d004eb6a55eacbf98df41f08
njrat
+ 461 additional samples on MalwareBazaar
Result
Malware family:
njrat
Create hunting rule
Score:
  10/10
Tags:
family:njrat discovery evasion persistence privilege_escalation trojan
Link:
https://tria.ge/reports/241216-g4btjaxrc1/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Event Triggered Execution: Netsh Helper DLL
System Location Discovery: System Language Discovery
Adds Run key to start application
Checks computer location settings
Drops startup file
Executes dropped EXE
Loads dropped DLL
Modifies Windows Firewall
Njrat family
njRAT/Bladabindi
Malware Config
C2 Extraction:
188.212.158.75:5556
Verdict:
Malicious
Tags:
rat njrat Win.Packed.Generic-9795615-0
YARA:
malware_Njrat_strings win_njrat_strings_oct_2023 Windows_Trojan_Njrat_30f3c220 MAL_Njrat MALWARE_Win_NjRAT JPCERTCC_Njrat
Link:
https://app.threat.zone/submission/a3b2ba66-011b-45f5-9266-7dd83a2441ba
Unpacked files
SH256 hash:
ef5c02c221b5cb992728758e29195115a8f5481cf9ca5072a0616f95d00a362c
MD5 hash:
475813f4cabffe076aefbd618a982512
SHA1 hash:
e2febca085bd5f5ac9aa2313bab17b4565a4024b
Detections:
NjRat
Create hunting rule
win_njrat_w1
Create hunting rule
win_njrat_g1
Create hunting rule
Link:
https://www.unpac.me/results/0ae461a9-efaa-480b-8c72-59eca8a9355b/
Please note that we are no longer able to provide a coverage score for Virus Total.

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:CN_disclosed_20180208_c
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects malware from disclosed CN malware set
Reference:https://twitter.com/cyberintproject/status/961714165550342146
Rule name:CN_disclosed_20180208_c_RID2E71
Create hunting rule
Author:Florian Roth
Description:Detects malware from disclosed CN malware set
Reference:https://twitter.com/cyberintproject/status/961714165550342146
Rule name:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
Rule name:malware_Njrat_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect njRAT in memory
Rule name:MALWARE_Win_NjRAT
Create hunting rule
Author:ditekSHen
Description:Detects NjRAT / Bladabindi / NjRAT Golden
Rule name:MAL_njrat
Create hunting rule
Author:SECUINFRA Falcon Team
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:Njrat
Create hunting rule
Author:botherder https://github.com/botherder
Description:Njrat
Rule name:Njrat
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect njRAT in memory
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_LightDefender_Njrat_Rule
Create hunting rule
Author:Skystars LightDefender
Description:Detects Njrat
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:SUSP_netsh_firewall_command
Create hunting rule
Author:SECUINFRA Falcon Team
Rule name:Windows_Trojan_Njrat_30f3c220
Create hunting rule
Rule name:Windows_Trojan_Njrat_30f3c220
Create hunting rule
Author:Elastic Security
Rule name:win_njrat_bytecodes_oct_2023
Create hunting rule
Author:Matthew @ Embee_Research
Rule name:win_njrat_strings_oct_2023
Create hunting rule
Author:Matthew @ Embee_Research
Rule name:win_njrat_w1
Create hunting rule
Author:Brian Wallace @botnet_hunter <bwall@ballastsecurity.net>
Description:Identify njRat

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

njrat

Executable exe ef5c02c221b5cb992728758e29195115a8f5481cf9ca5072a0616f95d00a362c

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3237976/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

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