MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 737bba8d3e9ad3e1526bf5949962af3b37107c80c767c473a820999eae507fbc. 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: 15


Intelligence 15 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 737bba8d3e9ad3e1526bf5949962af3b37107c80c767c473a820999eae507fbc
SHA3-384 hash: 48cdcc890a1ef1ea7e7b3237bebb727768b5a99df1266032827045d409b747388a7a34123f04a1ca490ff0118f31d97e
SHA1 hash: e1d047c97e3bdfe273b215b42eccde32ca2ca63f
MD5 hash: 2784277bd68152abf75c6c6d59fab7af
humanhash: oven-earth-social-potato
File name:2784277bd68152abf75c6c6d59fab7af.exe
Download: download sample
Signature njrat
Create hunting rule
File size:2'447'360 bytes
First seen:2024-04-20 19:30:16 UTC
Last seen:2024-04-20 20:27:20 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'757 x AgentTesla, 19'665 x Formbook, 12'254 x SnakeKeylogger)
ssdeep 49152:T2Q8G4mSmM8sik/AJ+/GRfzlW+oCZBNKoiYNsVjGMFWm02qG6zSo2:T2VmT8B4JAGllW+DBNdtN811
Threatray 27 similar samples on MalwareBazaar
TLSH T14DB53310C5E80C26C80FC6FF8D6E729A416EC6CB4D263D3BCC943C95D5A626BA57D728
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
File icon (PE):PE icon
dhash icon 8000e4d4e0608820 (1 x njrat)
Reporter abuse_ch
Tags:exe NjRAT RAT


Avatar
abuse_ch
njrat C2:
3.125.209.94:19177

Intelligence

File Origin
# of uploads :
2
# of downloads :
559
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
njrat
Create hunting rule
ID:
1
File name:
737bba8d3e9ad3e1526bf5949962af3b37107c80c767c473a820999eae507fbc.exe
Verdict:
Malicious activity
Analysis date:
2024-04-20 19:33:28 UTC
Tags:
evasion rat njrat bladabindi remote umbralstealer stealer discord exfiltration
Link:
https://app.any.run/tasks/164fb910-951a-4135-8626-4762bdd39de4

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a file
DNS request
Creating a window
Connection attempt
Sending a custom TCP request
Launching a process
Creating a file in the %AppData% directory
Creating a process with a hidden window
Searching for synchronization primitives
Launching the process to change network settings
Sending an HTTP GET request
Connection attempt to an infection source
Using the Windows Management Instrumentation requests
Searching for the window
Unauthorized injection to a recently created process
Launching the process to change the firewall settings
Query of malicious DNS domain
Sending a TCP request to an infection source
Adding an exclusion to Microsoft Defender
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/662417f63137a4e0f3bc64c9/reports/6e510db5-4b76-480f-b0b2-c29e12e90369/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/737bba8d3e9ad3e1526bf5949962af3b37107c80c767c473a820999eae507fbc
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/c60f70ad-62ae-44d6-bcd0-3bbc438319bf
Result
Threat name:
Blank Grabber, Njrat, Umbral Stealer
Create hunting rule
Detection:
malicious
Classification:
spre.phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1429103
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Check if machine is in data center or colocation facility
Contains functionality to disable the Task Manager (.Net Source)
Contains functionality to spread to USB devices (.Net source)
Disables zone checking for all users
Drops PE files with benign system names
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
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 domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: System File Execution Location Anomaly
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Uses netsh to modify the Windows network and firewall settings
Yara detected Blank Grabber
Yara detected Costura Assembly Loader
Yara detected Generic Downloader
Yara detected Njrat
Yara detected Umbral Stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1429103 Sample: KvS2rT08PQ.exe Startdate: 20/04/2024 Architecture: WINDOWS Score: 100 43 0.tcp.eu.ngrok.io 2->43 45 keyauth.win 2->45 47 ip-api.com 2->47 59 Snort IDS alert for network traffic 2->59 61 Multi AV Scanner detection for domain / URL 2->61 63 Found malware configuration 2->63 65 16 other signatures 2->65 9 KvS2rT08PQ.exe 5 2->9         started        signatures3 process4 file5 37 C:\Users\user\AppData\Local\...\svchost.exe, PE32 9->37 dropped 39 C:\Users\user\AppData\Local\Temp\Umbral.exe, PE32 9->39 dropped 41 C:\Users\user\...\ANDYzz-protected.exe, PE32+ 9->41 dropped 67 Drops PE files with benign system names 9->67 13 svchost.exe 1 6 9->13         started        17 Umbral.exe 14 3 9->17         started        19 ANDYzz-protected.exe 14 2 9->19         started        signatures6 process7 dnsIp8 49 0.tcp.eu.ngrok.io 18.158.249.75, 19177, 49737, 49740 AMAZON-02US United States 13->49 51 3.124.142.205, 19177, 49759, 49760 AMAZON-02US United States 13->51 57 2 other IPs or domains 13->57 69 Antivirus detection for dropped file 13->69 71 System process connects to network (likely due to code injection or exploit) 13->71 73 Multi AV Scanner detection for dropped file 13->73 79 3 other signatures 13->79 21 netsh.exe 13->21         started        23 netsh.exe 13->23         started        25 netsh.exe 13->25         started        53 ip-api.com 208.95.112.1, 49734, 80 TUT-ASUS United States 17->53 75 Machine Learning detection for dropped file 17->75 77 Found many strings related to Crypto-Wallets (likely being stolen) 17->77 27 WMIC.exe 1 17->27         started        55 keyauth.win 104.26.0.5, 443, 49733, 49735 CLOUDFLARENETUS United States 19->55 signatures9 process10 process11 29 conhost.exe 21->29         started        31 conhost.exe 23->31         started        33 conhost.exe 25->33         started        35 conhost.exe 27->35         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/737bba8d3e9ad3e1526bf5949962af3b37107c80c767c473a820999eae507fbc
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/737bba8d3e9ad3e1526bf5949962af3b37107c80c767c473a820999eae507fbc/
Threat name:
ByteCode-MSIL.Trojan.Cassiopeia
Create hunting rule
Status:
Malicious
First seen:
2024-04-08 04:00:53 UTC
File Type:
PE (.Net Exe)
Extracted files:
6
AV detection:
26 of 38 (68.42%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=on53vdj6tlj6cutl6wkjsyvphm3ra7eay5t4i45iecmz5lsqp66a._file
Verdict:
malicious
Label(s):
njrat
Create hunting rule
Similar samples:
20ea4bd44c356f2d3ca1c678394fd0eea380c1115f98e0d981b81e74d1bd9946
njrat
612d82ca739d3b1d4e76eed256652110ae019bf91776919edf9fff090c59fbe2
njrat
6d8c3b83da4fbd2d8671d426a9d9713124d4da232bd8432de8adaa58d8bc1d12
njrat
dd95a518a502780ec49b27354a120d36ed0e804cf4afb26b6887ffd49ba9317f
njrat
+ 17 additional samples on MalwareBazaar
Result
Malware family:
umbral
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla family:njrat family:umbral botnet:hacked evasion keylogger spyware stealer trojan
Link:
https://tria.ge/reports/240420-x8cvdsga63/
Behaviour
Enumerates system info in registry
Modifies system certificate store
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Legitimate hosting services abused for malware hosting/C2
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Modifies Windows Firewall
AgentTesla payload
AgentTesla
Detect Umbral payload
Umbral
njRAT/Bladabindi
Malware Config
C2 Extraction:
https://discord.com/api/webhooks/1225910337656590376/EwVP3wlMQgDXxoBxwLhaflFWF2WGja-17Tz3uwtoNirVyl9iU_nVCUsOrUJN46JTk-_-
hakim32.ddns.net:2000
0.tcp.eu.ngrok.io:19177
Unpacked files
SH256 hash:
24251c6105a1f345dbb16860c2405647127b8b03e03b0d0c1c61f896a6c7b7b0
MD5 hash:
33eb68c8c4fc521d64ed82219cdb19f2
SHA1 hash:
2d114152924ea141df11082d6f337bf7e9a81035
Link:
https://www.unpac.me/results/9d712d91-6ae7-4421-a530-3e8350c7b8fd/
SH256 hash:
508bcd1a6b7ed82e60873eb1b035647ec9f8f9facdf65d6d6a73b8ef37d5bb9e
MD5 hash:
3071f4f7b11a6bf6c623e83eed6d2418
SHA1 hash:
37fd78d1296659109f2c94c9c750b5a98d158f11
Link:
https://www.unpac.me/results/9d712d91-6ae7-4421-a530-3e8350c7b8fd/
SH256 hash:
944c19f992f5301ac8936dcdbd4efb59fbc4f47dcdcc39a77b5e87b4effd27f4
MD5 hash:
774fa31e76af56bbad395e1e3ac68721
SHA1 hash:
fe65c14179b2cf0cbd44758578cf878d7dcef879
Link:
https://www.unpac.me/results/9d712d91-6ae7-4421-a530-3e8350c7b8fd/
SH256 hash:
737bba8d3e9ad3e1526bf5949962af3b37107c80c767c473a820999eae507fbc
MD5 hash:
2784277bd68152abf75c6c6d59fab7af
SHA1 hash:
e1d047c97e3bdfe273b215b42eccde32ca2ca63f
Link:
https://www.unpac.me/results/9d712d91-6ae7-4421-a530-3e8350c7b8fd/
Malware family:
njRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/737bba8d3e9a/report/overview.html
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: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 (HIGH_ENTROPY_VA)high

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