MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f38c4ec565e4b4d2ef603e26ee5d226a43d3b8f4bcd84f77cb857f730ec13847. 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: f38c4ec565e4b4d2ef603e26ee5d226a43d3b8f4bcd84f77cb857f730ec13847
SHA3-384 hash: 5e7ee9bcef7bab3b2c0dc5e1267d12fbfe98bd03504ce0396ee549ea750ffed4ef74c599187b0caf42e752852391ca37
SHA1 hash: 4c14bec1f13ed925955e364ccbabe14792644666
MD5 hash: 619ecac4ac487ce74331cae8258c4227
humanhash: beer-juliet-magnesium-west
File name:FastCrystals-1.21.1-fabric-1.5.3.jar
Download: download sample
Signature SilentNet
Create hunting rule
File size:199'729 bytes
First seen:2026-07-10 10:07:36 UTC
Last seen:Never
File type:Java file jar
MIME type:application/zip
ssdeep 6144:MLODuw3yvA1tDkE70+6xJUqHj6m17980Grnfwa:XjCvARkEoRJVHj6u9lGrfwa
TLSH T13B14127A915FA12AECB7A73E8790DD92B97693D47206366F03E058414CC0CAF1B44FAD
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 :
140
Origin country :
US US
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
FastCrystals-1.21.1-fabric-1.5.3.jar
Verdict:
Malicious activity
Analysis date:
2026-07-09 22:59:31 UTC
Tags:
silentnet stealer etherhiding python evasion openssl tool arch-exec arch-doc
Link:
https://app.any.run/tasks/75f24c26-5918-4531-adbe-7805800167a1

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/74149/
Detection(s):
SecuriteInfo.com.Trojan.Java.Agent.15731.26676.UNOFFICIAL
Create hunting rule

Verdict:
Clean
Score:
89.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a5027d313f68731ed6b2fcb
Tags:
n/a
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/6a50c479e8c7f96ab902daf0/reports/7f53acba-5d7a-42f5-8d23-68d45b0245bd/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/f38c4ec565e4b4d2ef603e26ee5d226a43d3b8f4bcd84f77cb857f730ec13847
Verdict:
Malicious
File Type:
jar
First seen:
2026-07-09T20:14:00Z UTC
Last seen:
2026-07-11T21:43:00Z UTC
Hits:
~10
Detections:
HEUR:Trojan.Java.Generic
Link:
https://opentip.kaspersky.com/f38c4ec565e4b4d2ef603e26ee5d226a43d3b8f4bcd84f77cb857f730ec13847/results?tab=lookup
Result
Threat name:
SilentNet
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
96 / 100
Link:
https://www.joesandbox.com/analysis/1940478
Signature
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
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: Rare Remote Thread Creation By Uncommon Source Image
Suricata IDS alerts for network traffic
Tries to harvest and steal browser information (history, passwords, etc)
Unusual module load detection (module proxying)
Writes to foreign memory regions
Yara detected SilentNet
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1940478 Sample: FastCrystals-1.21.1-fabric-... Startdate: 10/07/2026 Architecture: WINDOWS Score: 96 90 pypi.org 2->90 92 files.pythonhosted.org 2->92 94 2 other IPs or domains 2->94 112 Suricata IDS alerts for network traffic 2->112 114 Yara detected SilentNet 2->114 116 Exploit detected, runtime environment starts unknown processes 2->116 118 3 other signatures 2->118 12 cmd.exe 1 2->12         started        signatures3 process4 process5 14 java.exe 5 12->14         started        17 conhost.exe 12->17         started        signatures6 128 Found many strings related to Crypto-Wallets (likely being stolen) 14->128 19 javaw.exe 884 14->19         started        process7 dnsIp8 96 150.136.141.142, 443, 49694, 49713 ORACLE-BMC-31898-OracleCorporationUS United States 19->96 98 198.178.224.35, 443, 49692, 49711 LATITUDE-SH-LatitudeshUS United States 19->98 100 185.178.208.191, 443, 49697, 49708 DDOS-GUARDRU Russia 19->100 50 C:\Users\user\AppData\Local\...\python.exe, PE32+ 19->50 dropped 52 C:\Users\user\AppData\Local\...\winsound.pyd, PE32+ 19->52 dropped 54 C:\Users\user\AppData\...\vcruntime140_1.dll, PE32+ 19->54 dropped 56 623 other files (none is malicious) 19->56 dropped 23 python.exe 218 19->23         started        file9 process10 dnsIp11 104 151.101.0.175, 443, 49721 FASTLY-FastlyIncUS Canada 23->104 106 pypi.org 151.101.128.223, 443, 49717, 49733 FASTLY-FastlyIncUS Canada 23->106 108 2 other IPs or domains 23->108 66 C:\Users\user\AppData\...\tmpyfx5mpdu.tmp, PE32+ 23->66 dropped 68 C:\Users\user\AppData\Local\...\winsound.pyd, PE32+ 23->68 dropped 70 C:\Users\user\AppData\...\vcruntime140_1.dll, PE32+ 23->70 dropped 72 32 other files (none is malicious) 23->72 dropped 120 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 23->120 122 Found many strings related to Crypto-Wallets (likely being stolen) 23->122 124 Tries to harvest and steal browser information (history, passwords, etc) 23->124 126 3 other signatures 23->126 28 pip.exe 23->28         started        30 python.exe 1088 23->30         started        34 python.exe 23->34         started        36 2 other processes 23->36 file12 signatures13 process14 dnsIp15 38 python.exe 28->38         started        42 conhost.exe 28->42         started        110 dualstack.python.map.fastly.net 151.101.0.223, 443, 49735 FASTLY-FastlyIncUS Canada 30->110 74 C:\Users\user\AppData\Local\...\pip3.exe, PE32+ 30->74 dropped 76 C:\Users\user\AppData\Local\...\pip3.12.exe, PE32+ 30->76 dropped 78 C:\Users\user\AppData\Local\...\pip.exe, PE32+ 30->78 dropped 86 378 other files (none is malicious) 30->86 dropped 44 conhost.exe 30->44         started        80 C:\Users\user\AppData\Local\...\stdole.py, Python 34->80 dropped 82 _78530B68_61F9_11D...A024580902_0_1_0.py, Python 34->82 dropped 84 _56A868B0_0AD4_11C...20AF0BA770_0_1_0.py, Python 34->84 dropped 88 2 other files (none is malicious) 34->88 dropped 46 conhost.exe 34->46         started        file16 process17 dnsIp18 102 151.101.192.223, 443, 49741 FASTLY-FastlyIncUS Canada 38->102 58 C:\Users\user\AppData\Local\...\wsdump.exe, PE32+ 38->58 dropped 60 C:\Users\user\AppData\...\cffi-gen-src.exe, PE32+ 38->60 dropped 62 C:\Users\user\AppData\Local\...\win32wnet.pyd, PE32+ 38->62 dropped 64 517 other files (none is malicious) 38->64 dropped 48 cmd.exe 38->48         started        file19 process20
Score:
0%
Verdict:
Benign
File Type:
ARCHIVE
Link:
https://malprob.io/report/f38c4ec565e4b4d2ef603e26ee5d226a43d3b8f4bcd84f77cb857f730ec13847
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f38c4ec565e4b4d2ef603e26ee5d226a43d3b8f4bcd84f77cb857f730ec13847/
Verdict:
Malicious
Threat:
Family.SILENTNET
Link:
https://tip.neiki.dev/file/f38c4ec565e4b4d2ef603e26ee5d226a43d3b8f4bcd84f77cb857f730ec13847
Threat name:
ByteCode-JAVA.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2026-07-09 22:59:34 UTC
File Type:
Binary (Archive)
Extracted files:
36
AV detection:
6 of 38 (15.79%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6oge5rlf4s2nf33ahyto4xjcnjb5hohuxtme656lqv7xgdwbhbdq._file
Result
Malware family:
silentnet
Create hunting rule
Score:
  10/10
Tags:
family:silentnet stealer
Link:
https://tria.ge/reports/260710-l5172aas4y/
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/f38c4ec565e4b4d2ef603e26ee5d226a43d3b8f4bcd84f77cb857f730ec13847

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/74149/

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