MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8c3c77343b99a72aee510464eb052e421b7dc1d4e48d3d19a0058fcec1ccfb23. 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: 13

Intelligence 13 IOCs YARA 33 File information Comments

SHA256 hash:	8c3c77343b99a72aee510464eb052e421b7dc1d4e48d3d19a0058fcec1ccfb23
SHA3-384 hash:	803966055cfaffbc09f503dbe77b619be5b0dbbe1075134c50ae0ae3f07ac2e071fb56649ca97462550e945ef0351db3
SHA1 hash:	10332b78771c719a353fb2e0d7c494bc042193f3
MD5 hash:	93596956ae1027934d004715dde6351a
humanhash:	tennis-high-emma-delaware
File name:	Bootstapper.exe
Download:	download sample
Signature	Vidar Create hunting rule
File size:	2'193'920 bytes
First seen:	2026-03-16 04:31:42 UTC
Last seen:	2026-03-16 05:46:00 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	d42595b695fc008ef2c56aabd8efd68e (186 x Vidar, 92 x Rhadamanthys, 84 x Stealc)
ssdeep	24576:6OS3xdYZo4FBnHc56Q/6nanUWzHhQX0QP0GnP3FTyg0Hu/uGiWPKzoHQ:6OShdy/nHw/6zWDGnJ0O/Jh
TLSH	T135A58C077CD144BAD06AE736C9A652A2BA71FC090B3263D32F91B7782FB67D05A35710
TrID	33.1% (.EXE) Win64 Executable (generic) (6522/11/2) 25.6% (.EXE) Win16 NE executable (generic) (5038/12/1) 10.4% (.ICL) Windows Icons Library (generic) (2059/9) 10.3% (.EXE) OS/2 Executable (generic) (2029/13) 10.1% (.EXE) Generic Win/DOS Executable (2002/3)
Magika	pebin
Reporter	user35335
Tags:	exe stealer vidar

user35335

https://www.youtube.com/watch?v=RbR0bgkksqo -> https://ryosweb.com -> https://rizvexeno.ws -> https://rizvexeno.ws/Bo%D0%BEtsta%D1%80%D1%80%D0%B5%D0%B3%D1%85Ul.zip

Intelligence

File Origin

# of uploads :

# of downloads :

215

Origin country :

Vendor Threat Intelligence

No detections

Malware family:

vidar

ID:

File name:

Bootstapper.exe

Verdict:

Malicious activity

Analysis date:

2026-03-16 04:16:36 UTC

Tags:

stealer stealc vidar xor-url generic golang

Link:

https://app.any.run/tasks/4fbea25d-3f5a-47fd-9da9-93daa1e5011d

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/57600/

Detection(s):

SecuriteInfo.com.Win64.Malware-gen.63814953.UNOFFICIAL

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=69b787d188c80c01586aa20e

Tags:

ransomware dridex virus remo

Result

Verdict:

Malware

Maliciousness:

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

adaptive-context anti-vm golang

Link:

https://www.filescan.io/uploads/69b787cf493cb7d62dff4203/reports/8ee0b336-e102-4dd3-835e-cb72e8d01d20/overview

Verdict:

Malicious

Labled as:

WinGo/Kryptik_AGeneric.AB trojan

Link:

https://www.hybrid-analysis.com/sample/8c3c77343b99a72aee510464eb052e421b7dc1d4e48d3d19a0058fcec1ccfb23

Verdict:

Clean

File Type:

exe x64

Link:

https://opentip.kaspersky.com/8c3c77343b99a72aee510464eb052e421b7dc1d4e48d3d19a0058fcec1ccfb23/results?tab=lookup

Verdict:

Suspicious

Link:

https://analyze.intezer.com/analyses/1bcc5c54-2630-4f30-b630-e6289f8fbdd0

Score:

99%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/8c3c77343b99a72aee510464eb052e421b7dc1d4e48d3d19a0058fcec1ccfb23

Verdict:

inconclusive

YARA:

4 match(es)

Tags:

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

Link:

https://app.malva.re/file/93596956ae1027934d004715dde6351a

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/8c3c77343b99a72aee510464eb052e421b7dc1d4e48d3d19a0058fcec1ccfb23/

Verdict:

Malicious

Threat:

Family.STEALC

Link:

https://tip.neiki.dev/file/8c3c77343b99a72aee510464eb052e421b7dc1d4e48d3d19a0058fcec1ccfb23

Threat name:

Win64.Spyware.Vidar

Status:

Suspicious

First seen:

2026-03-16 04:32:29 UTC

File Type:

PE+ (Exe)

Extracted files:

AV detection:

11 of 24 (45.83%)

Threat level:

2/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=rq6honb3tgtsv3srarsowbjoiinx3qou4sgt2gnaawh45qom7mrq._file

Result

Malware family:

vidar

Score:

10/10

Tags:

family:vidar botnet:e4f31c9dab4d04c850cabc632c2d3701 stealer

Link:

https://tria.ge/reports/260316-e53brscw3t/

Behaviour

Detects Vidar Stealer

Vidar

Vidar family

Malware Config

C2 Extraction:

https://195.201.248.201
https://telegram.me/mm8hyx
https://steamcommunity.com/profiles/76561198728266687

Unpacked files

SH256 hash:

8c3c77343b99a72aee510464eb052e421b7dc1d4e48d3d19a0058fcec1ccfb23

MD5 hash:

93596956ae1027934d004715dde6351a

SHA1 hash:

10332b78771c719a353fb2e0d7c494bc042193f3

Link:

https://www.unpac.me/results/c3dba81b-279d-472a-b4e4-ebdf7ae0850c/

Malware family:

Vidar

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/8c3c77343b99/report/overview.html

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

Threat name:

Legit

Score:

0.14

Link:

https://yomi.yoroi.company/submissions/8c3c77343b99a72aee510464eb052e421b7dc1d4e48d3d19a0058fcec1ccfb23

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

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:	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:	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:	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA Create hunting rule
Author:	ditekSHen
Description:	Detects Windows executables referencing non-Windows User-Agents

Rule name:	pe_no_import_table Create hunting rule
Description:	Detect pe file that no import table

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:	SUSP_XORed_Mozilla_Oct19 Create hunting rule
Author:	Florian Roth
Description:	Detects suspicious single byte XORed keyword 'Mozilla/5.0' - it uses yara's XOR modifier and therefore cannot print the XOR key. You can use the CyberChef recipe linked in the reference field to brute force the used key.
Reference:	https://gchq.github.io/CyberChef/#recipe=XOR_Brute_Force()

Rule name:	SUSP_XORed_Mozilla_RID2DB4 Create hunting rule
Author:	Florian Roth
Description:	Detects suspicious XORed keyword - Mozilla/5.0
Reference:	Internal Research

Rule name:	SUSP_XORed_URL_In_EXE Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects an XORed URL in an executable
Reference:	https://twitter.com/stvemillertime/status/1237035794973560834

Rule name:	SUSP_XORed_URL_in_EXE_RID2E46 Create hunting rule
Author:	Florian Roth
Description:	Detects an XORed URL in an executable
Reference:	https://twitter.com/stvemillertime/status/1237035794973560834

Rule name:	Sus_CMD_Powershell_Usage Create hunting rule
Author:	XiAnzheng
Description:	May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

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

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

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.

Web download

Vidar

exe 8c3c77343b99a72aee510464eb052e421b7dc1d4e48d3d19a0058fcec1ccfb23

(this sample)

Delivery method

Distributed via web download

Cape

https://www.capesandbox.com/analysis/57600/

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