MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fc8fd2e9a4cf0a4c15028d0fdfeeda3e8c887969b7c1a835e509006e21059d37. 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

Vidar

Vendor detections: 10

Intelligence 10 IOCs YARA 35 File information Comments

SHA256 hash:	fc8fd2e9a4cf0a4c15028d0fdfeeda3e8c887969b7c1a835e509006e21059d37
SHA3-384 hash:	d1b5405f6881cd84c0a5500efc1ac581f210df4aca4dd0b3d95bff863d838f2433b76d633d3e0791bdcc3db4b54b3ff4
SHA1 hash:	d2e54a7bee3b974dff4bbda58653a6b55443dbe0
MD5 hash:	74da149c15f383bfc2e411cc9d886dc6
humanhash:	ink-equal-zulu-aspen
File name:	UStarteX.zip
Download:	download sample
Signature	Vidar Create hunting rule
File size:	4'962'408 bytes
First seen:	2025-12-22 14:24:14 UTC
Last seen:	Never
File type:	zip
MIME type:	application/zip
ssdeep	24576:kH5vxYhLXktYlBHt6qpGrHOE0yUUMx2gI0++F2P9U2FszuiUzY67vxxWUKqUUFwJ:kH5vxYhhBhpAn0yUVx2gvoPq2jDxx7B4
TLSH	T18A36AD4D56B8E4516E7A022D7DE299CF815928709BBE8AF0E3F62D505313DCE2E7108F
Magika	zip
Reporter	burger
Tags:	file-pumped vidar zip

Intelligence

File Origin

# of uploads :

# of downloads :

124

Origin country :

File Archive Information

This file archive contains 1 file(s), sorted by their relevance:

File name:	UStarteX.exe
Pumped file	This file is pumped. MalwareBazaar has de-pumped it.
File size:	1'138'421'134 bytes
SHA256 hash:	2725fd8b56e6fd94ac6183fb8d871d141f026f4cf4fad10dfa2e8804459f9306
MD5 hash:	626fb5cc15156195ddb451c064e50776
De-pumped file size:	7'563'264 bytes (Vs. original size of 1'138'421'134 bytes)
De-pumped SHA256 hash:	cd26dbb9c803aa81bc353a528ea8335bd3070fdc988e0c98b070b1426d595c28
De-pumped MD5 hash:	1a1eca4afce8019df602f317f2ade1ef
MIME type:	application/x-dosexec
Signature	Vidar

Vendor Threat Intelligence

Details

Link:

https://research.acce.ciphertechsolutions.com/results/219b87ca-5c1f-447d-a166-eef0fdc18909/

Verdict:

Clean

Score:

50%

Link:

https://cyber-fortress.com/docs/result/index.php?id=694954a61f457957572364d3

Tags:

n/a

Result

Verdict:

Malicious

File Type:

ZIP File - Malicious

Link:

https://app.docguard.net/fc8fd2e9a4cf0a4c15028d0fdfeeda3e8c887969b7c1a835e509006e21059d37/results/dashboard

Behaviour

SuspiciousEmbeddedObjects detected

Gathering data

Verdict:

Suspicious

Labled as:

HEUR/Pumpar.Generic

Link:

https://www.hybrid-analysis.com/sample/fc8fd2e9a4cf0a4c15028d0fdfeeda3e8c887969b7c1a835e509006e21059d37

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/fc8fd2e9a4cf0a4c15028d0fdfeeda3e8c887969b7c1a835e509006e21059d37

Verdict:

Clean

File Type:

zip

Link:

https://opentip.kaspersky.com/fc8fd2e9a4cf0a4c15028d0fdfeeda3e8c887969b7c1a835e509006e21059d37/results?tab=lookup

Score:

44%

Verdict:

Susipicious

File Type:

Result

Malware family:

vidar

Score:

10/10

Tags:

family:vidar discovery spyware stealer

Link:

https://tria.ge/reports/251222-vzj61axmby/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Modifies data under HKEY_USERS

Modifies registry class

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

Browser Information Discovery

System Time Discovery

Drops file in Windows directory

Checks installed software on the system

Reads user/profile data of local email clients

Reads user/profile data of web browsers

Detects Vidar Stealer

Vidar

Vidar family

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

Threat name:

Legit

Score:

0.15

Link:

https://yomi.yoroi.company/submissions/fc8fd2e9a4cf0a4c15028d0fdfeeda3e8c887969b7c1a835e509006e21059d37

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:	Any_SU_Domain Create hunting rule
Author:	you
Description:	Detect any reference to .su domains or subdomains

Rule name:	command_and_control Create hunting rule
Author:	CD_R0M_
Description:	This rule searches for common strings found by malware using C2. Based on a sample used by a Ransomware group

Rule name:	CP_Script_Inject_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	Detects attempts to inject code into another process across PE, ELF, Mach-O binaries

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

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

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

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

Rule name:	dependsonpythonailib Create hunting rule
Author:	Tim Brown
Description:	Hunts for dependencies on Python AI libraries

Rule name:	DetectEncryptedVariants Create hunting rule
Author:	Zinyth
Description:	Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded

Rule name:	DetectGoMethodSignatures Create hunting rule
Author:	Wyatt Tauber
Description:	Detects Go method signatures in unpacked Go binaries

Rule name:	Detect_Golang_Binary Create hunting rule
Author:	Andrew Morrow
Description:	Detects binaries compiled with Go

Rule name:	dgaagas Create hunting rule
Author:	Harshit
Description:	Uses certutil.exe to download a file named test.txt

Rule name:	GoBinTest Create hunting rule

Rule name:	golang Create hunting rule

Rule name:	Golangmalware Create hunting rule
Author:	Dhanunjaya
Description:	Malware in Golang

Rule name:	goLangMatch3 Create hunting rule

Rule name:	goLangMatch4 Create hunting rule

Rule name:	golang_binary_string Create hunting rule
Description:	Golang strings present

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

Rule name:	golang_duffcopy_amd64 Create hunting rule

Rule name:	Golang_Find_CSC846 Create hunting rule
Author:	Ashar Siddiqui
Description:	Find Go Signatuers

Rule name:	Golang_Find_CSC846_Simple Create hunting rule
Author:	Ashar Siddiqui
Description:	Find Go Signatuers

Rule name:	HiveRansomware Create hunting rule
Author:	Dhanunjaya
Description:	Yara Rule To Detect Hive V4 Ransomware

Rule name:	PK_PUMP_AND_DUMP Create hunting rule
Author:	Will Metcalf @node5
Description:	Walks Zip Central Directory filename entries looking for abused extension then checks for a file that's at least 25M and then check to see how much uncompressed size is vs compressed size

Rule name:	ProgramLanguage_Golang Create hunting rule
Author:	albertzsigovits
Description:	Application written in Golang programming language

Rule name:	RANSOMWARE Create hunting rule
Author:	ToroGuitar

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

Rule name:	Suspicious_Golang_Binary Create hunting rule
Author:	Tim Machac
Description:	Triage: Golang-compiled binary with suspicious OS/persistence/network strings (not family-specific)

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

Rule name:	weird_zip_high_compression_ratio Create hunting rule
Author:	Maxime THIEBAUT (@0xThiebaut)
Description:	Detects single-entry ZIP files with a suspiciously high compression ratio (>100:1) and decompressed size above the 500MB AV limit
Reference:	https://twitter.com/Cryptolaemus1/status/1633099154623803394