MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6540089b451cdaf6d29e7b44cd7c8666ca86187b1c6aec12de2976547814b733. 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

DefendNot

Vendor detections: 14

Intelligence 14 IOCs YARA 30 File information Comments

SHA256 hash:	6540089b451cdaf6d29e7b44cd7c8666ca86187b1c6aec12de2976547814b733
SHA3-384 hash:	8c79d439adc50ea626c43ee57d0d820477d93a22e0e958e5c6e6cc271f3783f060c32f47cb1ba631e65e4881ef49dfc3
SHA1 hash:	e1a1bd2934cfe41d4d7842eac92ab33126d93174
MD5 hash:	0d8f8619434a2e14e7f4989a85d270f8
humanhash:	seventeen-carpet-oregon-eleven
File name:	file
Download:	download sample
Signature	DefendNot Create hunting rule
File size:	11'148'800 bytes
First seen:	2026-09-22 16:14:18 UTC
Last seen:	2026-09-27 14:29:47 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	d42595b695fc008ef2c56aabd8efd68e (1'398 x Vidar, 331 x RemusStealer, 134 x Stealc)
ssdeep	196608:aPhMZiR30Razo6+fvNNneSrbnQ5Z5sTjVYH:acip0d6+f1NneUgsdYH
TLSH	T1BDB69D03FCA144E9C0A9E5758A679262BB717C485B3123E73B50F3286F76BE06E79740
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	Bitsight
Tags:	b DefendNot dropped-by-gcleaner exe MIX10.file

Bitsight

url: http://91.92.242.236/service

Intelligence

File Origin

# of uploads :

# of downloads :

175

Origin country :

Vendor Threat Intelligence

No detections

Malware family:

n/a

ID:

File name:

6540089b451cdaf6d29e7b44cd7c8666ca86187b1c6aec12de2976547814b733.zip

Verdict:

Malicious activity

Analysis date:

2026-09-22 16:39:57 UTC

Tags:

arch-exec susp-powershell golang defendnot tool

Link:

https://app.any.run/tasks/c6213bdf-237c-415d-afe5-c94adac87f4e

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/88356/

Detection(s):

SecuriteInfo.com.Trojan.Siggen34.18820.16291289.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a file

Creating a file in the Windows subdirectories

Creating a process from a recently created file

Creating a process with a hidden window

Creating a file in the %temp% directory

Launching a process

Loading a suspicious library

Forced system process termination

Сreating synchronization primitives

Adding an exclusion to Microsoft Defender

Unauthorized injection to a system process

Enabling autorun by creating a file

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

anti-vm crypto dropper golang packed

Link:

https://www.filescan.io/uploads/6ab2a998900a35a8b748bb4d/reports/994a61c6-22d4-4f87-b92f-a648c1ea2c70/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_60%

Link:

https://www.hybrid-analysis.com/sample/6540089b451cdaf6d29e7b44cd7c8666ca86187b1c6aec12de2976547814b733

Verdict:

Malicious

File Type:

exe x64

First seen:

2026-09-22T14:32:00Z UTC

Last seen:

2026-09-23T20:34:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/6540089b451cdaf6d29e7b44cd7c8666ca86187b1c6aec12de2976547814b733/results?tab=lookup

Verdict:

Suspicious

Link:

https://analyze.intezer.com/analyses/0e501ed2-f60d-44d2-b13b-6235729cf2e4

Score:

73%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/6540089b451cdaf6d29e7b44cd7c8666ca86187b1c6aec12de2976547814b733

Verdict:

Vidar Stealer

YARA:

5 match(es)

Tags:

Executable Go Loader (Factory-v3) PE (Portable Executable) PE File Layout T1027 T1055 Vidar Stealer Win 64 Exe x64

Link:

https://app.malva.re/file/0d8f8619434a2e14e7f4989a85d270f8

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/6540089b451cdaf6d29e7b44cd7c8666ca86187b1c6aec12de2976547814b733/

Threat name:

Win64.Trojan.Alien

Status:

Suspicious

First seen:

2026-09-22 16:22:49 UTC

File Type:

PE+ (Exe)

AV detection:

21 of 38 (55.26%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=mvaarg2fdtnpnuu6pncm27egm3fimgd3drvoyew6ff3fi6auw4zq._file

Verdict:

malicious

Label(s):

HACKTOOL_DefendNot

Link:

https://reports.threatray.com/494b5fe3-0201-4ec5-9254-3ac6cb804363

Result

Malware family:

defendnot

Score:

10/10

Tags:

family:defendnot execution hacktool persistence

Link:

https://tria.ge/reports/260922-tqd3ysab73/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Executes a command shell one-liner

Checks for VirtualBox DLLs, possible anti-VM trick

Drops file in Windows directory

Executes dropped EXE

Loads dropped DLL

Command and Scripting Interpreter: PowerShell

Detects Defendnot

Family: Defendnot

Unpacked files

SH256 hash:

6540089b451cdaf6d29e7b44cd7c8666ca86187b1c6aec12de2976547814b733

MD5 hash:

0d8f8619434a2e14e7f4989a85d270f8

SHA1 hash:

e1a1bd2934cfe41d4d7842eac92ab33126d93174

Link:

https://www.unpac.me/results/8f5d64ae-40e2-4058-9507-3751fc70001a/

Malware family:

Defendnot

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/6540089b451c/report/overview.html

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/6540089b451cdaf6d29e7b44cd7c8666ca86187b1c6aec12de2976547814b733

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:	DebuggerException__SetConsoleCtrl 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:	Detect_Go_GOMAXPROCS Create hunting rule
Author:	Obscurity Labs LLC
Description:	Detects Go binaries by the presence of runtime.GOMAXPROCS in the runtime metadata

Rule name:	detect_powershell Create hunting rule
Author:	daniyyell
Description:	Detects suspicious PowerShell activity related to malware execution

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:	identity_golang Create hunting rule
Author:	Eric Yocam
Description:	find Golang malware

Rule name:	IronTiger_HTTPBrowser_Dropper Create hunting rule
Author:	Cyber Safety Solutions, Trend Micro
Description:	Iron Tiger Malware - HTTPBrowser Dropper
Reference:	http://goo.gl/T5fSJC

Rule name:	MD5_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for MD5 constants

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:	RemusStealer_GoPayload Create hunting rule
Author:	burger
Description:	Detects RemusStealer Go-compiled payload

Rule name:	RIPEMD160_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for RIPEMD-160 constants

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

Rule name:	SHA1_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA1 constants

Rule name:	SHA512_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA384/SHA512 constants

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

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/

File information

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

Web download

DefendNot

exe 6540089b451cdaf6d29e7b44cd7c8666ca86187b1c6aec12de2976547814b733

(this sample)

Dropped by

Gcleaner

Delivery method

Distributed via web download

Cape

https://www.capesandbox.com/analysis/88356/

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