MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a598384c401bc65d4bea2dd6a712b1e2339e158de6af783315a2f77ab8f04a1e. 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

RustyStealer

Vendor detections: 10

Intelligence 10 IOCs YARA 13 File information Comments

SHA256 hash:	a598384c401bc65d4bea2dd6a712b1e2339e158de6af783315a2f77ab8f04a1e
SHA3-384 hash:	adbcdc2eba7f76fc1efd825abfb8cdcff97ae9c411423e58a8cbf7f19aaa0e8d87ee663ed830ceb1db4b1b42bbd3aaa2
SHA1 hash:	9be9b8a1f81b5dc6f1d6aac3ff014a8a180210a9
MD5 hash:	1d2c1845f8fcd4461a37eaa14efdde7c
humanhash:	michigan-romeo-earth-chicken
File name:	Zapret.exe
Download:	download sample
Signature	RustyStealer Create hunting rule
File size:	1'444'288 bytes
First seen:	2026-08-29 12:07:09 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	e9bf7f1b9f3130fc9a318d927c506610 (1 x RustyStealer)
ssdeep	24576:mIlWLcz/9l9vWnC1IasdXF36jbBBqpBc1klCdfTRiRpEj/TC:vlO8/Nv4fxSBBqvMkk7RiLYbC
TLSH	T1BB651203B2E755F8E216C074834A9573BF36B8C91A227DBF52F0D6B02E569943F29B05
TrID	45.6% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 18.0% (.EXE) Win64 Executable (generic) (6522/11/2) 13.9% (.EXE) Win16 NE executable (generic) (5038/12/1) 5.6% (.ICL) Windows Icons Library (generic) (2059/9) 5.6% (.EXE) OS/2 Executable (generic) (2029/13)
Magika	pebin
Reporter	Alex_sev
Tags:	exe Psw RustyStealer signed stealer Typhon

Code Signing Certificate

Organisation:	Microsoft Corporation
Issuer:	Microsoft Corporation
Algorithm:	sha256WithRSAEncryption
Valid from:	2026-04-07T18:51:58Z
Valid to:	2029-07-15T18:51:58Z
Serial number:	793bc9abd55e69b44ec32346bc4129f9
Thumbprint Algorithm:	SHA256
Thumbprint:	123dd07683673c1e1b3b819e4ee2d71d18d31722db5c9f2b2419f86ebcb6d79c
Source:	This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin

# of uploads :

# of downloads :

188

Origin country :

Vendor Threat Intelligence

No detections

Malware family:

n/a

ID:

File name:

exe

Verdict:

Malicious activity

Analysis date:

2026-08-29 12:16:39 UTC

Tags:

auto-reg

Link:

https://app.any.run/tasks/674b53b4-63f3-4cd0-acca-c52106f5fc52

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/83240/

Result

Verdict:

Malware

Maliciousness:

Behaviour

Сreating synchronization primitives

Creating a file

Running batch commands

Launching a process

Creating a process from a recently created file

DNS request

Connection attempt

Launching a service

Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch

Verdict:

Unknown

Threat level:

n/a -.1.0/10

Confidence:

100%

Tags:

adaptive-context anti-debug dropper obfuscated packed packed signed vmprotect

Link:

https://www.filescan.io/uploads/6a92cb7734c2a4ac3cae1f8a/reports/cdee92a2-e5c0-41e7-a3ca-dc7ca0524789/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/a598384c401bc65d4bea2dd6a712b1e2339e158de6af783315a2f77ab8f04a1e

Verdict:

Malicious

File Type:

exe x64

First seen:

2026-08-28T16:46:00Z UTC

Last seen:

2026-08-31T04:44:00Z UTC

Hits:

~100

Link:

https://opentip.kaspersky.com/a598384c401bc65d4bea2dd6a712b1e2339e158de6af783315a2f77ab8f04a1e/results?tab=lookup

Malware family:

StubMakerLoader

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/d4c1fece-d295-483e-bef4-c77be088beeb

Score:

88%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/a598384c401bc65d4bea2dd6a712b1e2339e158de6af783315a2f77ab8f04a1e

Verdict:

inconclusive

YARA:

4 match(es)

Tags:

Executable PE (Portable Executable) PE File Layout Win 64 Exe x64

Link:

https://app.malva.re/file/1d2c1845f8fcd4461a37eaa14efdde7c

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/a598384c401bc65d4bea2dd6a712b1e2339e158de6af783315a2f77ab8f04a1e/

Threat name:

Win64.Trojan.Ravartar

Status:

Malicious

First seen:

2026-08-29 03:03:12 UTC

File Type:

PE+ (Exe)

AV detection:

18 of 36 (50.00%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=uwmdqtcadpdf2s7kfxlkoevr4izz4fmn42xxqmyvul3xvohqjipa._file

Result

Malware family:

n/a

Score:

7/10

Tags:

defense_evasion execution persistence

Link:

https://tria.ge/reports/260829-paf56ayeke/

Behaviour

Checks processor information in registry

Delays execution with timeout.exe

Enumerates system info in registry

Suspicious use of WriteProcessMemory

Executes a command shell one-liner

Adds Run key to start application

Executes dropped EXE

Loads dropped DLL

Unpacked files

SH256 hash:

a598384c401bc65d4bea2dd6a712b1e2339e158de6af783315a2f77ab8f04a1e

MD5 hash:

1d2c1845f8fcd4461a37eaa14efdde7c

SHA1 hash:

9be9b8a1f81b5dc6f1d6aac3ff014a8a180210a9

Link:

https://www.unpac.me/results/376cf222-7472-4ad0-ba34-6f2e9393bf09/

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Malicious File

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/a598384c401bc65d4bea2dd6a712b1e2339e158de6af783315a2f77ab8f04a1e

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:	golang_bin_JCorn_CSC846 Create hunting rule
Author:	Justin Cornwell
Description:	CSC-846 Golang detection ruleset

Rule name:	grakate_stealer_nov_2021 Create hunting rule

Rule name:	NET Create hunting rule
Author:	malware-lu

Rule name:	pe_detect_tls_callbacks Create hunting rule

Rule name:	PE_Digital_Certificate Create hunting rule
Author:	albertzsigovits

Rule name:	ProgramLanguage_Rust Create hunting rule
Author:	albertzsigovits
Description:	Application written in Rust programming language

Rule name:	Rustyloader_mem_loose Create hunting rule
Author:	James_inthe_box
Description:	Corroded buerloader
Reference:	https://app.any.run/tasks/83064edd-c7eb-4558-85e8-621db72b2a24

Rule name:	SEH__vectored Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	telebot_framework Create hunting rule
Author:	vietdx.mb

Rule name:	TH_AntiVM_MassHunt_Win_Malware_2026_CYFARE Create hunting rule
Author:	CYFARE
Description:	Detects Windows malware employing anti-VM / anti-sandbox evasion techniques across VMware, VirtualBox, Hyper-V, QEMU, Xen, and generic sandbox environments
Reference:	https://cyfare.net/

Rule name:	VECT_Ransomware Create hunting rule
Author:	Mustafa Bakhit
Description:	Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.

File information

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

Cape

https://www.capesandbox.com/analysis/83240/

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