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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c4cf28aa2d923d79ef42d559bd900de89d8a2d731a63f40ac7c650ce0e131c41. 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: 6


Intelligence 6 IOCs YARA 13 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c4cf28aa2d923d79ef42d559bd900de89d8a2d731a63f40ac7c650ce0e131c41
SHA3-384 hash: 2768acbead6f25e10e1d380b9802765d4ddcd8f14d19f001c3cf75eb3073f3bedac52afb050030f1227149f289fcae64
SHA1 hash: 58f2dc33918c926d884818d2703ffb7b90e653f9
MD5 hash: 02d052a2a6cf89727e1a904ec79d128c
humanhash: king-utah-solar-three
File name:67Client.jar
Download: download sample
Signature SilentNet
Create hunting rule
File size:2'753'666 bytes
First seen:2026-10-31 15:02:05 UTC
Last seen:Never
File type:Java file jar
MIME type:application/zip
ssdeep 49152:eeblsTQxsJjcvchbiOZv/B3tqqo7DOgjoj8MakyL3MzaMOtNNa:eeBsdm2bvpeZ4y3MVkHa
TLSH T1A7D5338D6F35409189A215374437D1F08BFCF6D68E4C63B0A6CAEB7B952528F2660F2D
TrID 77.1% (.JAR) Java Archive (13500/1/2)
22.8% (.ZIP) ZIP compressed archive (4000/1)
Magika jar
Reporter wok
Tags:jar java Python SilentNet

Intelligence

File Origin
# of uploads :
1
# of downloads :
88
Origin country :
AT AT
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
jar
Verdict:
Malicious activity
Analysis date:
2026-10-31 15:47:39 UTC
Tags:
silentnet stealer etherhiding evasion arch-exec arch-doc auto python openssl tool
Link:
https://app.any.run/tasks/a20e4163-3542-4bd2-886a-629fecaddcc8

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/96398/
Verdict:
Clean
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6ae60305b175ade21dcec774
Tags:
n/a
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/6ae60300139a26e83ebf6726/reports/8e0a4898-b71e-45fc-b7a1-caa2dab1ccda/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/c4cf28aa2d923d79ef42d559bd900de89d8a2d731a63f40ac7c650ce0e131c41
Result
Malware family:
Silentnet
Create hunting rule
Verdict:
Malicious
Trusted hash?:
False
File:
11
Classes:
8
Nested archives:
0
Source:
https://www.jarscanner.org/
Findings
Minecraft session theft indicators: Code associated with Minecraft session-token collection was found.
Silentnet signature: Known Silentnet data path was found.
External process execution: ProcessBuilder can execute operating-system commands.
User-Agent: May indicate outbound HTTP requests or client impersonation.
Verdict:
Clean
File Type:
jar
Link:
https://opentip.kaspersky.com/c4cf28aa2d923d79ef42d559bd900de89d8a2d731a63f40ac7c650ce0e131c41/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/1995881
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
Modifies the windows firewall
Multi AV Scanner detection for dropped 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
Yara detected Python Keylogger
Yara detected SilentNet
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1995881 Sample: 67Client.jar Startdate: 31/10/2026 Architecture: WINDOWS Score: 100 117 files.pythonhosted.org 2->117 119 pypi.org 2->119 121 2 other IPs or domains 2->121 151 Suricata IDS alerts for network traffic 2->151 153 Multi AV Scanner detection for dropped file 2->153 155 Yara detected SilentNet 2->155 157 9 other signatures 2->157 12 cmd.exe 1 2->12         started        14 powershell.exe 2->14         started        16 powershell.exe 2->16         started        signatures3 process4 process5 18 java.exe 5 12->18         started        20 conhost.exe 12->20         started        22 conhost.exe 14->22         started        24 conhost.exe 16->24         started        process6 26 javaw.exe 884 18->26         started        dnsIp7 133 185.178.208.191, 443, 49710, 49714 DDOS-GUARDRU Russia 26->133 135 172.66.146.203, 443, 49708 CLOUDFLARENET-CloudflareIncUS Canada 26->135 93 C:\Users\user\AppData\Local\...\winsound.pyd, PE32+ 26->93 dropped 95 C:\Users\user\AppData\...\vcruntime140_1.dll, PE32+ 26->95 dropped 97 C:\Users\user\AppData\...\vcruntime140.dll, PE32+ 26->97 dropped 99 623 other malicious files 26->99 dropped 30 python.exe 218 26->30         started        file8 process9 dnsIp10 137 64.130.32.46, 443, 49719 TERASWITCH-TeraSwitchNetworksIncUS Germany 30->137 139 198.178.224.35, 443, 49717 LATITUDE-SH-LatitudeshUS United States 30->139 141 4 other IPs or domains 30->141 109 C:\Users\user\AppData\...\tmpjjj79t2o.tmp, PE32+ 30->109 dropped 111 C:\Users\user\AppData\Local\...\winsound.pyd, PE32+ 30->111 dropped 113 C:\Users\user\AppData\...\vcruntime140_1.dll, PE32+ 30->113 dropped 115 32 other malicious files 30->115 dropped 143 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 30->143 145 Tries to harvest and steal browser information (history, passwords, etc) 30->145 147 Writes to foreign memory regions 30->147 149 2 other signatures 30->149 35 pip.exe 30->35         started        37 python.exe 1118 30->37         started        42 python.exe 30->42         started        44 2 other processes 30->44 file11 signatures12 process13 dnsIp14 46 python.exe 35->46         started        49 conhost.exe 35->49         started        123 dualstack.python.map.fastly.net 151.101.128.223, 443, 49742, 49747 FASTLY-FastlyIncUS Canada 37->123 125 pypi.org 151.101.192.223, 443, 49741, 49746 FASTLY-FastlyIncUS Canada 37->125 77 C:\Users\user\AppData\Local\...\pip3.exe, PE32+ 37->77 dropped 79 C:\Users\user\AppData\Local\...\pip3.12.exe, PE32+ 37->79 dropped 81 C:\Users\user\AppData\Local\...\pip.exe, PE32+ 37->81 dropped 89 390 other malicious files 37->89 dropped 159 Suspicious powershell command line found 37->159 161 Uses schtasks.exe or at.exe to add and modify task schedules 37->161 163 Uses netsh to modify the Windows network and firewall settings 37->163 167 2 other signatures 37->167 51 conhost.exe 37->51         started        53 cmd.exe 37->53         started        127 208.115.201.238 LIMESTONENETWORKS-LimestoneNetworksIncUS Germany 42->127 129 142.251.150.119 GOOGLE-GoogleLLCUS United States 42->129 131 3 other IPs or domains 42->131 83 C:\Recovery\OEM\...\RuntimeBroker.exe, PE32+ 42->83 dropped 85 C:\Users\user\AppData\Local\...\stdole.py, Python 42->85 dropped 87 _78530B68_61F9_11D...A024580902_0_1_0.py, Python 42->87 dropped 91 4 other malicious files 42->91 dropped 165 Adds a directory exclusion to Windows Defender 42->165 55 powershell.exe 42->55         started        57 powershell.exe 42->57         started        59 powershell.exe 42->59         started        61 12 other processes 42->61 file15 signatures16 process17 file18 101 C:\Users\user\AppData\Local\...\wsdump.exe, PE32+ 46->101 dropped 103 C:\Users\user\AppData\...\cffi-gen-src.exe, PE32+ 46->103 dropped 105 C:\Users\user\AppData\Local\...\win32wnet.pyd, PE32+ 46->105 dropped 107 467 other malicious files 46->107 dropped 63 conhost.exe 55->63         started        65 conhost.exe 57->65         started        67 conhost.exe 59->67         started        69 conhost.exe 61->69         started        71 conhost.exe 61->71         started        73 conhost.exe 61->73         started        75 8 other processes 61->75 process19
Score:
0%
Verdict:
Benign
File Type:
ARCHIVE
Link:
https://malprob.io/report/c4cf28aa2d923d79ef42d559bd900de89d8a2d731a63f40ac7c650ce0e131c41
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c4cf28aa2d923d79ef42d559bd900de89d8a2d731a63f40ac7c650ce0e131c41/
Threat name:
ByteCode-JAVA.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2026-10-31 15:02:32 UTC
File Type:
Binary (Archive)
Extracted files:
11
AV detection:
4 of 38 (10.53%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ythsrkrnsi6xt32c2vm33ean5coyulltdjr7icwhyzim4dqtdraq._file
Result
Malware family:
n/a
Score:
  3/10
Tags:
n/a
Link:
https://tria.ge/reports/261031-semehscs5z/
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/c4cf28aa2d923d79ef42d559bd900de89d8a2d731a63f40ac7c650ce0e131c41

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:exploit_any_poppopret
Create hunting rule
Author:Jeff White [karttoon@gmail.com] @noottrak
Description:Identify POP -> POP -> RET opcodes for quick ROP Gadget creation in target binaries.
Rule name:JAVA_Malware_Unknown_ForgeAuto_03a7ca91
Create hunting rule
Author:Marjoriefort
Description:Detects Unknown (class, etat binaire)
Rule name:JAVA_Malware_Unknown_ForgeAuto_0ece8eba
Create hunting rule
Author:Marjoriefort
Description:Detects Unknown (class, etat binaire)
Rule name:JAVA_Malware_Unknown_ForgeAuto_1fde0fe5
Create hunting rule
Author:Marjoriefort
Description:Detects Unknown (class, etat binaire)
Rule name:JAVA_Malware_Unknown_ForgeAuto_50b45f1d
Create hunting rule
Author:Marjoriefort
Description:Detects Unknown (class, etat binaire)
Rule name:JAVA_Malware_Unknown_ForgeAuto_5888acd8
Create hunting rule
Author:Marjoriefort
Description:Detects Unknown (class, etat binaire)
Rule name:JAVA_Malware_Unknown_ForgeAuto_61773a0a
Create hunting rule
Author:Marjoriefort
Description:Detects Unknown (class, etat binaire)
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:SilentNet_CharArith_Obfuscation
Create hunting rule
Author:NyxIndius
Description:Detects Java class with char-arithmetic string obfuscation (ldc/sipush A - B, isub, i2c) in volume
Rule name:SilentNet_FakeFabric_Jar_Container
Create hunting rule
Author:NyxIndius
Description:Detects fake Fabric mod JAR with net/fabric/ package (not net/fabricmc/) and random class names, associated with SilentNet loader/stealer
Rule name:SilentNet_FakeFabric_Metadata
Create hunting rule
Author:NyxIndius
Description:Detects MANIFEST or fabric.mod.json pointing to a net.fabric.* entrypoint (fake Fabric mod, SilentNet)
Rule name:SilentNet_FakeFabric_Mod_Jar
Create hunting rule
Author:NyxIndius
Description:Detects SilentNet Minecraft stealer fake Fabric mod JAR: fabric.mod.json plus random-named classes directly under com/github/ or net/fabric/ (incl. inner classes), without net/fabricmc/
Rule name:SilentNet_Loader_Class
Create hunting rule
Author:NyxIndius
Description:Detects SilentNet Java loader/stealer class: char-arith obfuscation plus launcher, dropper, custom HTTPS/DoH client or Minecraft session reflection

File information

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

Web download

SilentNet

Java file jar c4cf28aa2d923d79ef42d559bd900de89d8a2d731a63f40ac7c650ce0e131c41

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/96398/
  
URLhaus
https://urlhaus.abuse.ch/url/4049367/

Comments