MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 290c3fc88cf265bd05e4a84c58ffc7b2d02700e5b2b1fbff67634885f4b11fe0. 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


SilentNet


Vendor detections: 8


Intelligence 8 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 290c3fc88cf265bd05e4a84c58ffc7b2d02700e5b2b1fbff67634885f4b11fe0
SHA3-384 hash: f88cf500981ce615272b652847389cb92a49fdcac887f5ca2add09aec1f2de661fbd3d2a5f6c482e835192ceade44b6a
SHA1 hash: bcfa9c40ca9beb7a162c042cb0c380822a0dd40f
MD5 hash: 90aec77c472ee9359531593ef331330f
humanhash: lactose-sweet-beryllium-kitten
File name:GrownKelpfinder.jar
Download: download sample
Signature SilentNet
Create hunting rule
File size:88'760 bytes
First seen:2026-06-24 11:54:27 UTC
Last seen:Never
File type:Java file jar
MIME type:application/zip
ssdeep 1536:bEhri1bySCyPTxF7cRtmJnEPqsvAyya4t+RDxDh51PNCVbR+s4np34h182O1:ari1byjkTX7c+ESsviXoRDH51QN+z14c
TLSH T1B08312971446DEF3CB3145F6842CF9AF66A309C8C9CB950F752C094CD422AE68F40EAC
TrID 77.1% (.JAR) Java Archive (13500/1/2)
22.8% (.ZIP) ZIP compressed archive (4000/1)
Magika jar
Reporter burger
Tags:jar SilentNet

Intelligence

File Origin
# of uploads :
1
# of downloads :
104
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
GrownKelpfinder.jar
Verdict:
Malicious activity
Analysis date:
2026-06-24 11:54:52 UTC
Tags:
silentnet stealer etherhiding evasion python openssl tool
Link:
https://app.any.run/tasks/50a1626b-0dc3-4ea9-b366-3e91d206ea68

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/71835/
Detection(s):
SecuriteInfo.com.Trojan.Java.Agent.15640.21908.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
81.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a3bc5841548daf709f966ad
Tags:
malware
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/6a3bc57f90632a45f7385bf8/reports/7ac3b29f-c93b-41d6-a1e4-03727f0a2c3f/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/290c3fc88cf265bd05e4a84c58ffc7b2d02700e5b2b1fbff67634885f4b11fe0
Verdict:
Malicious
File Type:
jar
First seen:
2026-06-22T23:51:00Z UTC
Last seen:
2026-06-24T21:43:00Z UTC
Hits:
~10
Detections:
HEUR:Trojan.Java.Generic
Link:
https://opentip.kaspersky.com/290c3fc88cf265bd05e4a84c58ffc7b2d02700e5b2b1fbff67634885f4b11fe0/results?tab=lookup
Result
Threat name:
n/a
Detection:
malicious
Classification:
spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1933115
Signature
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Creates a thread in another existing process (thread injection)
Exploit detected, runtime environment starts unknown processes
Found many strings related to Crypto-Wallets (likely being stolen)
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Modifies the windows firewall
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Potential Privilege Escalation using Task Scheduler highest RunLevel
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Rare Remote Thread Creation By Uncommon Source Image
Sigma detected: Schedule system process
Sigma detected: Schtasks Creation Or Modification With SYSTEM Privileges
Suricata IDS alerts for network traffic
Suspicious powershell command line found
Tries to harvest and steal browser information (history, passwords, etc)
Unusual module load detection (module proxying)
Uses netsh to modify the Windows network and firewall settings
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1933115 Sample: GrownKelpfinder.jar Startdate: 24/06/2026 Architecture: WINDOWS Score: 100 126 pypi.org 2->126 128 files.pythonhosted.org 2->128 130 2 other IPs or domains 2->130 154 Suricata IDS alerts for network traffic 2->154 156 Multi AV Scanner detection for dropped file 2->156 158 Multi AV Scanner detection for submitted file 2->158 160 9 other signatures 2->160 12 cmd.exe 1 2->12         started        14 powershell.exe 2->14         started        17 powershell.exe 2->17         started        signatures3 process4 signatures5 19 java.exe 5 12->19         started        22 conhost.exe 12->22         started        176 Loading BitLocker PowerShell Module 14->176 24 conhost.exe 14->24         started        26 conhost.exe 17->26         started        process6 signatures7 162 Found many strings related to Crypto-Wallets (likely being stolen) 19->162 28 javaw.exe 884 19->28         started        process8 dnsIp9 140 132.145.155.63, 443, 49696, 49712 ORACLE-BMC-31898-OracleCorporationUS United States 28->140 142 198.178.224.35, 443, 49694, 49710 LATITUDE-SH-LatitudeshUS United States 28->142 144 185.178.208.191, 443, 49698, 49707 DDOS-GUARDRU Russia 28->144 112 C:\Users\user\AppData\Local\...\winsound.pyd, PE32+ 28->112 dropped 114 C:\Users\user\AppData\...\vcruntime140_1.dll, PE32+ 28->114 dropped 116 C:\Users\user\AppData\...\vcruntime140.dll, PE32+ 28->116 dropped 118 623 other malicious files 28->118 dropped 32 python.exe 218 28->32         started        file10 process11 dnsIp12 120 151.101.128.175, 443, 49720 FASTLY-FastlyIncUS Canada 32->120 122 151.101.128.223, 443, 49716 FASTLY-FastlyIncUS Canada 32->122 124 2 other IPs or domains 32->124 88 C:\Users\user\AppData\...\tmp_bmdvghp.tmp, PE32+ 32->88 dropped 90 C:\Users\user\AppData\Local\...\winsound.pyd, PE32+ 32->90 dropped 92 C:\Users\user\AppData\...\vcruntime140_1.dll, PE32+ 32->92 dropped 94 32 other malicious files 32->94 dropped 146 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 32->146 148 Found many strings related to Crypto-Wallets (likely being stolen) 32->148 150 Tries to harvest and steal browser information (history, passwords, etc) 32->150 152 3 other signatures 32->152 37 pip.exe 32->37         started        39 python.exe 1088 32->39         started        44 python.exe 32->44         started        46 2 other processes 32->46 file13 signatures14 process15 dnsIp16 48 python.exe 37->48         started        51 conhost.exe 37->51         started        132 pypi.org 151.101.64.223, 443, 49733, 49734 FASTLY-FastlyIncUS Canada 39->132 96 C:\Users\user\AppData\Local\...\pip3.exe, PE32+ 39->96 dropped 98 C:\Users\user\AppData\Local\...\pip3.12.exe, PE32+ 39->98 dropped 100 C:\Users\user\AppData\Local\...\pip.exe, PE32+ 39->100 dropped 108 378 other malicious files 39->108 dropped 164 Suspicious powershell command line found 39->164 166 Uses schtasks.exe or at.exe to add and modify task schedules 39->166 168 Uses netsh to modify the Windows network and firewall settings 39->168 172 2 other signatures 39->172 53 conhost.exe 39->53         started        55 cmd.exe 39->55         started        134 142.251.156.119 GOOGLE-GoogleLLCUS United States 44->134 136 23.222.197.54 AKAMAI-AS-AkamaiTechnologiesIncUS United States 44->136 138 23.35.30.73 AKAMAI-AS-AkamaiTechnologiesIncUS United States 44->138 102 C:\Recovery\OEM\...\RuntimeBroker.exe, PE32+ 44->102 dropped 104 C:\Users\user\AppData\Local\...\stdole.py, Python 44->104 dropped 106 _78530B68_61F9_11D...A024580902_0_1_0.py, Python 44->106 dropped 110 4 other malicious files 44->110 dropped 170 Adds a directory exclusion to Windows Defender 44->170 57 powershell.exe 44->57         started        60 powershell.exe 44->60         started        62 powershell.exe 44->62         started        64 7 other processes 44->64 file17 signatures18 process19 file20 80 C:\Users\user\AppData\Local\...\wsdump.exe, PE32+ 48->80 dropped 82 C:\Users\user\AppData\Local\...\win32wnet.pyd, PE32+ 48->82 dropped 84 C:\Users\user\AppData\Local\...\win32ts.pyd, PE32+ 48->84 dropped 86 529 other malicious files 48->86 dropped 174 Loading BitLocker PowerShell Module 57->174 66 conhost.exe 57->66         started        68 conhost.exe 60->68         started        70 conhost.exe 62->70         started        72 conhost.exe 64->72         started        74 conhost.exe 64->74         started        76 conhost.exe 64->76         started        78 3 other processes 64->78 signatures21 process22
Score:
0%
Verdict:
Benign
File Type:
ARCHIVE
Link:
https://malprob.io/report/290c3fc88cf265bd05e4a84c58ffc7b2d02700e5b2b1fbff67634885f4b11fe0
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/290c3fc88cf265bd05e4a84c58ffc7b2d02700e5b2b1fbff67634885f4b11fe0/
Verdict:
Malicious
Threat:
Family.SILENTNET
Link:
https://tip.neiki.dev/file/290c3fc88cf265bd05e4a84c58ffc7b2d02700e5b2b1fbff67634885f4b11fe0
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=fegd7sem6js32bpevbgfr76hwlicoahfwky7x73hmneil5frd7qa._file
Result
Malware family:
silentnet
Create hunting rule
Score:
  10/10
Tags:
family:silentnet stealer
Link:
https://tria.ge/reports/260624-n3deasby6q/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
Link:
https://yomi.yoroi.company/submissions/290c3fc88cf265bd05e4a84c58ffc7b2d02700e5b2b1fbff67634885f4b11fe0

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:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/71835/

Comments