MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 91b1b82d19155a4028599299e72779af33147ef437bbe72055550fe8315ce8db. 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: 19


Intelligence 19 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 91b1b82d19155a4028599299e72779af33147ef437bbe72055550fe8315ce8db
SHA3-384 hash: 285bac51c69a0309fbf30b2d6334ee98b7a751ff9bb8cf8e8d7944c6dfddddbff678afca1528e796de7efa1caf5c70f2
SHA1 hash: 1313d2c9cfaa7945bba0b7c41c2ddb9ef1cf1aac
MD5 hash: 1257aa3a7c4ebcab95cf00c54565becd
humanhash: oklahoma-juliet-undress-river
File name:bRQk.exe
Download: download sample
Signature njrat
Create hunting rule
File size:32'768 bytes
First seen:2023-11-24 17:07:21 UTC
Last seen:2023-11-28 16:07:24 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'609 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 384:d0bUe5XB4e0XWOnPw0Q0mS03AWTxtTUFQqzFDObbZ:OT9BuFI55dNbZ
TLSH T17BE208067BE94215D6BC5AFC8CB313214772E3838532EB6F5CDC88CA4B676D00645EE9
TrID 47.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
20.2% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
8.4% (.SCR) Windows screen saver (13097/50/3)
6.8% (.EXE) Win64 Executable (generic) (10523/12/4)
4.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
Reporter pmelson
Tags:exe NjRAT

Intelligence

File Origin
# of uploads :
3
# of downloads :
388
Origin country :
US US
Vendor Threat Intelligence
Malware family:
njrat
Create hunting rule
ID:
1
File name:
91b1b82d19155a4028599299e72779af33147ef437bbe72055550fe8315ce8db.zip
Verdict:
Malicious activity
Analysis date:
2023-11-24 22:55:04 UTC
Tags:
rat njrat bladabindi remote
Link:
https://app.any.run/tasks/3b635bc1-e6ca-4415-b1a5-0dccf6abde50

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Njrat
Create hunting rule
Link:
https://www.capesandbox.com/analysis/460053/
Detection(s):
Win.Packed.njRAT-7445143-0
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Win.Dropper.Detected-9941784-0
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a window
Searching for synchronization primitives
DNS request
Using the Windows Management Instrumentation requests
Sending a custom TCP request
Running batch commands
Creating a process with a hidden window
Creating a file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
cmd greyware keylogger lolbin njrat packed
Link:
https://www.filescan.io/uploads/6560d8727485e5b1ecb9f022/reports/e22958fb-d1ac-41be-8571-6af972573a5d/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/91b1b82d19155a4028599299e72779af33147ef437bbe72055550fe8315ce8db
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.
Malware family:
njRAT
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/114a8fb0-5182-4e83-8fd6-1ff2f35e6bd1
Result
Threat name:
Njrat
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1347527
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Contains functionality to log keystrokes (.Net Source)
Found malware configuration
Machine Learning detection for sample
Self deletion via cmd or bat file
Snort IDS alert for network traffic
Uses dynamic DNS services
Yara detected Njrat
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/91b1b82d19155a4028599299e72779af33147ef437bbe72055550fe8315ce8db
Detection:
njrat
Create hunting rule
Link:
https://mwdb.cert.pl/sample/91b1b82d19155a4028599299e72779af33147ef437bbe72055550fe8315ce8db/
Threat name:
ByteCode-MSIL.Backdoor.Bladabhindi
Create hunting rule
Status:
Malicious
First seen:
2023-11-24 17:08:03 UTC
File Type:
PE (.Net Exe)
AV detection:
23 of 23 (100.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=sgy3qlizcvneakczskm6oj3zv4zri7xug656oicvkuh6qmk45dnq._file
Verdict:
malicious
Label(s):
njrat
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Result
Malware family:
njrat
Create hunting rule
Score:
  10/10
Tags:
family:njrat botnet:nyan cat
Link:
https://tria.ge/reports/231124-vnh5kach66/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Malware Config
C2 Extraction:
puertocol20.duckdns.org:2054
Unpacked files
SH256 hash:
91b1b82d19155a4028599299e72779af33147ef437bbe72055550fe8315ce8db
MD5 hash:
1257aa3a7c4ebcab95cf00c54565becd
SHA1 hash:
1313d2c9cfaa7945bba0b7c41c2ddb9ef1cf1aac
Detections:
win_njrat_bytecodes_V2_oct_2023
Create hunting rule
Link:
https://www.unpac.me/results/fa7cbeec-e237-4e6a-8a57-bb808a433f6f/
Malware family:
njRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/91b1b82d1915/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/91b1b82d19155a4028599299e72779af33147ef437bbe72055550fe8315ce8db

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:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:Njrat
Create hunting rule
Author:botherder https://github.com/botherder
Description:Njrat
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:yarahub_win_njrat_bytecodes_V2_oct_2023
Create hunting rule
Author:Matthew @ Embee_Research

File information

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

Web download

njrat

Executable exe 91b1b82d19155a4028599299e72779af33147ef437bbe72055550fe8315ce8db

(this sample)

  
Link
https://www.virustotal.com/gui/file/91b1b82d19155a4028599299e72779af33147ef437bbe72055550fe8315ce8db/detection
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/460053/

Comments