MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a81cb039be675069423242bcdfc536867b35645ddee957e7910de031e8cd6dcd. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a81cb039be675069423242bcdfc536867b35645ddee957e7910de031e8cd6dcd
SHA3-384 hash: f11c6b9747acf8adf6661ed40387e5a53209ffdae0738c78d964481e4b1f48c5c1c5e5d9e2b027d107990a6fccaec267
SHA1 hash: 85d207e7312a46ae127f568b9fb30acf66f527f2
MD5 hash: 28e5cf4ac63d45f7fa5cc9ac8fb12261
humanhash: texas-ceiling-virginia-six
File name:KryptonClient1.21.11.jar
Download: download sample
Signature SilentNet
Create hunting rule
File size:78'472 bytes
First seen:2026-06-02 14:38:08 UTC
Last seen:Never
File type:Java file jar
MIME type:application/zip
ssdeep 1536:E/NsTjpxfWOAbCuMaf9DTClF19c73oQQ0:E8WfbRHmFunN
TLSH T1E57302EA7422EC02DE17827C89C6852AE11D25F6965FAD1700100D1B1F6FD67AFEF4C1
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 :
111
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
KryptonClient1.21.11.jar-embed-launcher.exe
Verdict:
Malicious activity
Analysis date:
2026-06-01 17:29:36 UTC
Tags:
arch-exec golang arch-doc github evasion etherhiding python stealer qrcode openssl tool
Link:
https://app.any.run/tasks/69b9926b-1c5b-4ea0-a224-6e04f3304f99

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/68806/
Verdict:
Clean
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a1eeadef8676ad4d360591b
Tags:
n/a
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/6a1eeadc46e44aecc0ca8122/reports/dc4fa764-565f-4092-aa71-a4a6328e95ab/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/a81cb039be675069423242bcdfc536867b35645ddee957e7910de031e8cd6dcd
Verdict:
Malicious
File Type:
jar
First seen:
2026-06-04T04:54:00Z UTC
Last seen:
2026-06-04T05:18:00Z UTC
Hits:
~10
Detections:
Trojan.Java.Agent.wh HEUR:Trojan.Java.Agent.gen
Link:
https://opentip.kaspersky.com/a81cb039be675069423242bcdfc536867b35645ddee957e7910de031e8cd6dcd/results?tab=lookup
Result
Threat name:
n/a
Detection:
suspicious
Classification:
n/a
Score:
22 / 100
Link:
https://www.joesandbox.com/analysis/1921703
Signature
Joe Sandbox ML detected suspicious sample
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1921703 Sample: KryptonClient1.21.11.jar Startdate: 02/06/2026 Architecture: WINDOWS Score: 22 12 Joe Sandbox ML detected suspicious sample 2->12 6 cmd.exe 2 2->6         started        process3 process4 8 java.exe 3 6->8         started        10 conhost.exe 6->10         started       
Score:
0%
Verdict:
Benign
File Type:
ARCHIVE
Link:
https://malprob.io/report/a81cb039be675069423242bcdfc536867b35645ddee957e7910de031e8cd6dcd
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a81cb039be675069423242bcdfc536867b35645ddee957e7910de031e8cd6dcd/
Verdict:
Clean
Link:
https://tip.neiki.dev/file/a81cb039be675069423242bcdfc536867b35645ddee957e7910de031e8cd6dcd
Threat name:
ByteCode-JAVA.Exploit.Generic
Create hunting rule
Status:
Suspicious
First seen:
2026-06-01 18:52:06 UTC
File Type:
Binary (Archive)
Extracted files:
12
AV detection:
4 of 24 (16.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=vaolaon6m5igsqrsik6n7rjwqz5tkzc533uvpz4rbxqdd2gnnxgq._file
Result
Malware family:
n/a
Score:
  3/10
Tags:
n/a
Link:
https://tria.ge/reports/260602-rzsllag16m/
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/a81cb039be675069423242bcdfc536867b35645ddee957e7910de031e8cd6dcd

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/68806/

Comments