MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 581cf2c3ef9a29652143f1ff041c6b421e83028094082bf2eff9fd44fa287f10. 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: 5

Intelligence 5 IOCs YARA 11 File information Comments

SHA256 hash:	581cf2c3ef9a29652143f1ff041c6b421e83028094082bf2eff9fd44fa287f10
SHA3-384 hash:	6e8d09ef24a7c6405d22e2cafc268da24dbf04101a10795cb58b3063504dec6a87ac098566f7930bb8ea6d58d273b54c
SHA1 hash:	af4c61b0b0dcc3d7df0c2cb825877689ead6d323
MD5 hash:	d4d13407d098c3da4531dc3bf104d95b
humanhash:	four-high-harry-batman
File name:	Krypton Client.jar
Download:	download sample
Signature	SilentNet Create hunting rule
File size:	3'868'291 bytes
First seen:	2026-10-20 16:12:45 UTC
Last seen:	Never
File type:	jar
MIME type:	application/zip
ssdeep	98304:jfIxNOzw/V/pbn795fiZlEYrUZMMTh4P4QyflpSUyhkjM:jSNhV/d95aZWYrUiMu1MlpwhkY
TLSH	T1A80633241DBBBEBA730049703EDA45F460C07D91BB718550B9989BAEF306F53A44E92F
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 :

# of downloads :

Origin country :

Vendor Threat Intelligence

No detections

Malware family:

n/a

ID:

File name:

https://donutclients.top/

Verdict:

Malicious activity

Analysis date:

2026-10-19 21:20:33 UTC

Tags:

silentnet stealer etherhiding evasion auto arch-exec arch-doc python openssl tool generic arch-scr

Link:

https://app.any.run/tasks/c34cc5cc-3a0f-4344-99f3-c3595321d491

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/93145/

Detection(s):

SecuriteInfo.com.Trojan.GenericKD.81874901.48435578.UNOFFICIAL

Verdict:

Clean

Score:

89.3%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6ad79321afb06e650cd7f12f

Tags:

n/a

Verdict:

Unknown

Threat level:

2.5/10

Confidence:

100%

Link:

https://www.filescan.io/uploads/6ad7931ceae9923f22ec0180/reports/f31894b3-d53b-4ac6-be11-3178a8626de9/overview

Verdict:

Malicious

Labled as:

Trojan.Generic

Link:

https://www.hybrid-analysis.com/sample/581cf2c3ef9a29652143f1ff041c6b421e83028094082bf2eff9fd44fa287f10

Verdict:

Clean

File Type:

jar

First seen:

2026-10-20T14:35:00Z UTC

Last seen:

2026-10-22T02:37:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/581cf2c3ef9a29652143f1ff041c6b421e83028094082bf2eff9fd44fa287f10/results?tab=lookup

Score:

Verdict:

Benign

File Type:

Result

Malware family:

n/a

Score:

3/10

Tags:

n/a

Link:

https://tria.ge/reports/261020-tn7bqassgs/

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/581cf2c3ef9a29652143f1ff041c6b421e83028094082bf2eff9fd44fa287f10

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:	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:	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