MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4f3b8d1cfa5d84f0eaa63da7af72f0f8d844d2130bdd5324b97d508985bf8748. 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: 18


Intelligence 18 IOCs 1 YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4f3b8d1cfa5d84f0eaa63da7af72f0f8d844d2130bdd5324b97d508985bf8748
SHA3-384 hash: 3209cadde536952cea157355417c1fa730a17a234677a18a802b13eae494c03fa5799c3130ee376c80dc99cb1498ba95
SHA1 hash: 2c82b390c927919d8cfe7135d66d76189eac876b
MD5 hash: 3621c2d95668ab045e7d618606d699c9
humanhash: early-alaska-yankee-uranus
File name:3621c2d95668ab045e7d618606d699c9.exe
Download: download sample
Signature njrat
Create hunting rule
File size:305'664 bytes
First seen:2024-07-31 04:40:16 UTC
Last seen:2024-07-31 05:25:27 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'611 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 3072:GR94Z8d0RYXzNCanWRsxClDaREaA32oBWYbvAHX:GRC4REKiy
Threatray 448 similar samples on MalwareBazaar
TLSH T12B54BC7833FEA10DF633FE76AF94F7489E5A76729218928D6940030B5871C81CEB6536
TrID 69.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.0% (.EXE) Win64 Executable (generic) (10523/12/4)
6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.2% (.EXE) Win32 Executable (generic) (4504/4/1)
1.9% (.EXE) Win16/32 Executable Delphi generic (2072/23)
File icon (PE):PE icon
dhash icon f0d4a2494daac4e0 (1 x njrat)
Reporter abuse_ch
Tags:exe NjRAT RAT


Avatar
abuse_ch
njrat C2:
147.185.221.21:33869

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
147.185.221.21:33869 https://threatfox.abuse.ch/ioc/1305392/

Intelligence

File Origin
# of uploads :
2
# of downloads :
518
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
njrat
Create hunting rule
ID:
1
File name:
3621c2d95668ab045e7d618606d699c9.exe
Verdict:
Malicious activity
Analysis date:
2024-07-31 04:43:15 UTC
Tags:
njrat wmi-base64
Link:
https://app.any.run/tasks/ce0623a3-588c-45df-90a6-3aaa8c9864b8

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66a9c061c06bd32e596e8b62
Tags:
Execution Generic Network Static Stealth Trojan Variant
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %AppData% directory
Сreating synchronization primitives
Creating a file
Creating a process from a recently created file
Creating a process with a hidden window
Creating a file in the Windows subdirectories
Enabling the 'hidden' option for recently created files
Creating a file in the Program Files subdirectories
Launching the process to change network settings
Creating a file in the %temp% directory
Launching a process
Searching for synchronization primitives
Unauthorized injection to a recently created process
Launching the process to change the firewall settings
Connection attempt to an infection source
Enabling autorun by creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
packed vbnet
Link:
https://www.filescan.io/uploads/66a9c05f8f66298c01f4aaa9/reports/4bd4c49a-b40d-40ea-959a-5a13f57f0171/overview
Verdict:
Malicious
Labled as:
MSILHeracles.Generic
Link:
https://www.hybrid-analysis.com/sample/4f3b8d1cfa5d84f0eaa63da7af72f0f8d844d2130bdd5324b97d508985bf8748
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/e8d76d1e-8392-400a-ba33-8234de5e9316
Result
Threat name:
Njrat
Create hunting rule
Detection:
malicious
Classification:
spre.phis.troj.adwa.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1485114
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Contains functionality to disable the Task Manager (.Net Source)
Contains functionality to spread to USB devices (.Net source)
Disables the Windows task manager (taskmgr)
Disables zone checking for all users
Drops PE files to the document folder of the user
Drops PE files to the startup folder
Drops PE files to the user root directory
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
Uses netsh to modify the Windows network and firewall settings
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Njrat
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1485114 Sample: ApVIkOzaxh.exe Startdate: 31/07/2024 Architecture: WINDOWS Score: 100 53 Found malware configuration 2->53 55 Malicious sample detected (through community Yara rule) 2->55 57 Antivirus detection for dropped file 2->57 59 11 other signatures 2->59 8 ApVIkOzaxh.exe 5 2->8         started        12 StUpdate.exe 1 2->12         started        14 StUpdate.exe 2->14         started        16 StUpdate.exe 2->16         started        process3 file4 47 C:\Users\user\server.exe, PE32 8->47 dropped 49 C:\Users\user\AppData\...\ApVIkOzaxh.exe.log, ASCII 8->49 dropped 69 Drops PE files to the user root directory 8->69 18 server.exe 2 14 8->18         started        71 Antivirus detection for dropped file 12->71 73 Multi AV Scanner detection for dropped file 12->73 75 Machine Learning detection for dropped file 12->75 signatures5 process6 dnsIp7 51 147.185.221.21, 33869, 49730, 49737 SALSGIVERUS United States 18->51 39 C:\Windows\SysWOW64xplower.exe, PE32 18->39 dropped 41 C:\Users\user\Favoritesxplower.exe, PE32 18->41 dropped 43 C:\Users\user\Documentsxplower.exe, PE32 18->43 dropped 45 9 other malicious files 18->45 dropped 61 Antivirus detection for dropped file 18->61 63 Multi AV Scanner detection for dropped file 18->63 65 Drops PE files to the document folder of the user 18->65 67 7 other signatures 18->67 23 netsh.exe 2 18->23         started        25 netsh.exe 2 18->25         started        27 netsh.exe 2 18->27         started        29 2 other processes 18->29 file8 signatures9 process10 process11 31 conhost.exe 23->31         started        33 conhost.exe 25->33         started        35 conhost.exe 27->35         started        37 conhost.exe 29->37         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4f3b8d1cfa5d84f0eaa63da7af72f0f8d844d2130bdd5324b97d508985bf8748
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4f3b8d1cfa5d84f0eaa63da7af72f0f8d844d2130bdd5324b97d508985bf8748/
Threat name:
Win32.Backdoor.njRAT
Create hunting rule
Status:
Malicious
First seen:
2024-07-26 21:12:00 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
25 of 38 (65.79%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=j45y2hh2lwcpb2vghwt264xq7dmejuqtbpovgjfzpviitbn7q5ea._file
Verdict:
malicious
Label(s):
njrat
Create hunting rule
Similar samples:
06b314e6e7127b58bdafcd05252a28af38233afe2b188584eb4d27ab372c8762
njrat
16e030019f05b734a973a0fafc0fb678d0eb2736cfd5159a7ea82ebf3c198170
njrat
4f3b8d1cfa5d84f0eaa63da7af72f0f8d844d2130bdd5324b97d508985bf8748
njrat
8f9a0a3430662a0c54deb0394287b0555c6963edcb9b0c8cb0f87962f17d0e87
njrat
a689b16dd9bfa6277ec62d9d0767b91326b3912066934a95c95f0a4ed0f57960
njrat
bd55b89d4b2189c1a2737653506e2f96244650c6411f47217cea8ab7d9b5fd27
njrat
c471b2d1d86cac31a117363ed55a71714aeec937f9a73977d2f2329914252f97
njrat
f6b10c59c9ce33c5c8f6b02c3293fe5d479e59542698c91b15af74bcce50ab8f
njrat
+ 438 additional samples on MalwareBazaar
Result
Malware family:
njrat
Create hunting rule
Score:
  10/10
Tags:
family:njrat botnet:复复美制美 discovery evasion persistence privilege_escalation trojan
Link:
https://tria.ge/reports/240731-fa4f1s1elf/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Event Triggered Execution: Netsh Helper DLL
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in System32 directory
Drops startup file
Executes dropped EXE
Loads dropped DLL
Checks computer location settings
Disables Task Manager via registry modification
Modifies Windows Firewall
njRAT/Bladabindi
Malware Config
C2 Extraction:
hakim32.ddns.net:2000
147.185.221.21:33869
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/3ac9f51d-693e-49da-9631-49577cba620d
Unpacked files
SH256 hash:
7abed83dea4ed7f11d27e68a3d56d8afa72d7f2f351b1c0bdeb35bb530395a72
MD5 hash:
155903dd6f17a4273ffe6aa492e3fae1
SHA1 hash:
b317cf1c9840f3d7fa4a54819ffb25e4241ff19c
Detections:
Njrat
Create hunting rule
CN_disclosed_20180208_c
Create hunting rule
MAL_Winnti_Sample_May18_1
Create hunting rule
Link:
https://www.unpac.me/results/5914a8fc-4ef6-4685-be9f-bfed26e34434/
SH256 hash:
4f3b8d1cfa5d84f0eaa63da7af72f0f8d844d2130bdd5324b97d508985bf8748
MD5 hash:
3621c2d95668ab045e7d618606d699c9
SHA1 hash:
2c82b390c927919d8cfe7135d66d76189eac876b
Link:
https://www.unpac.me/results/5914a8fc-4ef6-4685-be9f-bfed26e34434/
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/4f3b8d1cfa5d84f0eaa63da7af72f0f8d844d2130bdd5324b97d508985bf8748

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:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

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 (GUARD_CF)high

Comments