MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f4d26d50fbcd9ce634bdf2ec2fab288cf16008898af2c5a9da2c5fea049a172a. 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: 7


Intelligence 7 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f4d26d50fbcd9ce634bdf2ec2fab288cf16008898af2c5a9da2c5fea049a172a
SHA3-384 hash: 5641461928c172a7eee7d02e97ec6766c8d59269db7d6d25c3ddbf04daa4ea5e2a4b07138c5fc1dc37b0b8984ffee010
SHA1 hash: fc86f18afd9e5805beb1426aaf9adc72ce11c443
MD5 hash: 33452e2365f5ceba4a62808522f061d2
humanhash: grey-quiet-alpha-timing
File name:Kind-s_Crystal_Optimizer-1.5.1.jar
Download: download sample
Signature SilentNet
Create hunting rule
File size:584'916 bytes
First seen:2026-07-12 11:12:12 UTC
Last seen:Never
File type:Java file jar
MIME type:application/zip
ssdeep 12288:9Jny8kpgRQJrZOTRnGcamPexKlSO4fa/adhUg9dx:bnyrpB84Q7Q8aEg9dx
TLSH T10BC42362469890FFEC2B67B345F512E27F7704A9FC9749CAD8B76572CB64682040238F
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 :
150
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
Kind-s_Crystal_Optimizer-1.5.1.jar
Verdict:
Malicious activity
Analysis date:
2026-07-11 22:07:23 UTC
Tags:
silentnet stealer etherhiding evasion python openssl tool arch-exec arch-doc
Link:
https://app.any.run/tasks/465b6c3c-b65d-44e3-993b-02fa075e0797

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/74313/
Detection(s):
SecuriteInfo.com.Trojan.GenericKD.80775964.21074.19885.UNOFFICIAL
Create hunting rule

Verdict:
Clean
Score:
89.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a52be99749f0a5acf20c297
Tags:
n/a
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/6a5376a542fd27311cb5282a/reports/1ff2238d-0fd7-4274-9ae5-1d86f7f69c7a/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/f4d26d50fbcd9ce634bdf2ec2fab288cf16008898af2c5a9da2c5fea049a172a
Verdict:
Malicious
File Type:
jar
First seen:
2026-07-11T19:09:00Z UTC
Last seen:
2026-07-13T20:16:00Z UTC
Hits:
~10
Detections:
HEUR:Trojan.Java.Generic
Link:
https://opentip.kaspersky.com/f4d26d50fbcd9ce634bdf2ec2fab288cf16008898af2c5a9da2c5fea049a172a/results?tab=lookup
Result
Threat name:
SilentNet
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1941196
Signature
Adds a directory exclusion to Windows Defender
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: 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
Yara detected SilentNet
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1941196 Sample: Kind-s_Crystal_Optimizer-1.... Startdate: 12/07/2026 Architecture: WINDOWS Score: 100 124 thisisafalsepositive.st 2->124 126 pypi.org 2->126 128 3 other IPs or domains 2->128 150 Suricata IDS alerts for network traffic 2->150 152 Multi AV Scanner detection for dropped file 2->152 154 Multi AV Scanner detection for submitted file 2->154 156 9 other signatures 2->156 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        172 Loading BitLocker PowerShell Module 14->172 24 conhost.exe 14->24         started        26 conhost.exe 17->26         started        process6 signatures7 158 Found many strings related to Crypto-Wallets (likely being stolen) 19->158 28 javaw.exe 884 19->28         started        process8 dnsIp9 138 132.145.155.63, 443, 49696, 49714 ORACLE-BMC-31898-OracleCorporationUS United States 28->138 140 198.178.224.35, 443, 49694, 49712 LATITUDE-SH-LatitudeshUS United States 28->140 142 thisisafalsepositive.st 185.178.208.191, 443, 49699, 49709 DDOS-GUARDRU Russia 28->142 110 C:\Users\user\AppData\Local\...\winsound.pyd, PE32+ 28->110 dropped 112 C:\Users\user\AppData\...\vcruntime140_1.dll, PE32+ 28->112 dropped 114 C:\Users\user\AppData\...\vcruntime140.dll, PE32+ 28->114 dropped 116 623 other malicious files 28->116 dropped 32 python.exe 217 28->32         started        file10 process11 dnsIp12 118 151.101.0.175, 443, 49724 FASTLY-FastlyIncUS Canada 32->118 120 pypi.org 151.101.64.223, 443, 49718, 49736 FASTLY-FastlyIncUS Canada 32->120 122 2 other IPs or domains 32->122 86 C:\Users\user\AppData\Local\...\winsound.pyd, PE32+ 32->86 dropped 88 C:\Users\user\AppData\...\vcruntime140_1.dll, PE32+ 32->88 dropped 90 C:\Users\user\AppData\...\vcruntime140.dll, PE32+ 32->90 dropped 92 31 other malicious files 32->92 dropped 144 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 32->144 146 Found many strings related to Crypto-Wallets (likely being stolen) 32->146 148 Tries to harvest and steal browser information (history, passwords, etc) 32->148 37 pip.exe 32->37         started        39 python.exe 1088 32->39         started        44 python.exe 32->44         started        46 conhost.exe 32->46         started        file13 signatures14 process15 dnsIp16 48 python.exe 37->48         started        51 conhost.exe 37->51         started        130 dualstack.python.map.fastly.net 151.101.128.223, 443, 49737, 49742 FASTLY-FastlyIncUS Canada 39->130 94 C:\Users\user\AppData\Local\...\pip3.exe, PE32+ 39->94 dropped 96 C:\Users\user\AppData\Local\...\pip3.12.exe, PE32+ 39->96 dropped 98 C:\Users\user\AppData\Local\...\pip.exe, PE32+ 39->98 dropped 106 378 other malicious files 39->106 dropped 162 Suspicious powershell command line found 39->162 164 Uses schtasks.exe or at.exe to add and modify task schedules 39->164 166 Uses netsh to modify the Windows network and firewall settings 39->166 170 2 other signatures 39->170 53 conhost.exe 39->53         started        132 150.136.141.142 ORACLE-BMC-31898-OracleCorporationUS United States 44->132 134 142.251.155.119 GOOGLE-GoogleLLCUS United States 44->134 136 2 other IPs or domains 44->136 100 C:\Recovery\OEM\...\RuntimeBroker.exe, PE32+ 44->100 dropped 102 C:\Users\user\AppData\Local\...\stdole.py, Python 44->102 dropped 104 _78530B68_61F9_11D...A024580902_0_1_0.py, Python 44->104 dropped 108 4 other malicious files 44->108 dropped 168 Adds a directory exclusion to Windows Defender 44->168 55 powershell.exe 44->55         started        58 powershell.exe 44->58         started        60 powershell.exe 44->60         started        62 7 other processes 44->62 file17 signatures18 process19 file20 78 C:\Users\user\AppData\Local\...\wsdump.exe, PE32+ 48->78 dropped 80 C:\Users\user\AppData\...\cffi-gen-src.exe, PE32+ 48->80 dropped 82 C:\Users\user\AppData\Local\...\win32wnet.pyd, PE32+ 48->82 dropped 84 526 other malicious files 48->84 dropped 160 Loading BitLocker PowerShell Module 55->160 64 conhost.exe 55->64         started        66 conhost.exe 58->66         started        68 conhost.exe 60->68         started        70 conhost.exe 62->70         started        72 conhost.exe 62->72         started        74 conhost.exe 62->74         started        76 3 other processes 62->76 signatures21 process22
Score:
8%
Verdict:
Benign
File Type:
ARCHIVE
Link:
https://malprob.io/report/f4d26d50fbcd9ce634bdf2ec2fab288cf16008898af2c5a9da2c5fea049a172a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f4d26d50fbcd9ce634bdf2ec2fab288cf16008898af2c5a9da2c5fea049a172a/
Threat name:
ByteCode-JAVA.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2026-07-11 22:07:26 UTC
File Type:
Binary (Archive)
Extracted files:
35
AV detection:
6 of 24 (25.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6tjg2uh3zwoomnf56lwc7kzirtywacejrlzmlko2frp6ube2c4va._file
Result
Malware family:
silentnet
Create hunting rule
Score:
  10/10
Tags:
family:silentnet stealer
Link:
https://tria.ge/reports/260712-na349agx3n/
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/f4d26d50fbcd9ce634bdf2ec2fab288cf16008898af2c5a9da2c5fea049a172a

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/74313/

Comments