MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b4a3fbc0f286f44bd854033fc15abebe2206344cc930ff715ae115047d963a09. 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

MassLogger

Vendor detections: 14

Intelligence 14 IOCs YARA 27 File information Comments

SHA256 hash:	b4a3fbc0f286f44bd854033fc15abebe2206344cc930ff715ae115047d963a09
SHA3-384 hash:	4309ff0635ee3c8a13b03ff1f8f899779411ec5c4e38917057d3d211c7d5a046728f1e8feaf337b33636e715e42ef467
SHA1 hash:	4e9c93fc20bf8f804b9651dc901addce23b2832e
MD5 hash:	8da189f7c2ce6234f1e7ee8f0c33573e
humanhash:	uniform-comet-comet-king
File name:	b4a3fbc0f286f44bd854033fc15abebe2206344cc930ff715ae115047d963a09
Download:	download sample
Signature	MassLogger Create hunting rule
File size:	1'206'272 bytes
First seen:	2026-09-10 14:21:54 UTC
Last seen:	2026-10-19 07:29:12 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (49'359 x AgentTesla, 20'862 x Formbook, 12'418 x SnakeKeylogger)
ssdeep	24576:Io+IGfpTAqvp3d8GZISKkqp76PX+VBd/gfG92wgoGHK5z+08KwRQsPJMkNa4MMME:IRpTFx3aG7Kkqp76POVT/8g2/ezt8K4r
TLSH	T1BE451255E369FA06D8EA5BF44A31E23523B60D4EA910E3238EDD8DDB7C31705AC46B43
TrID	72.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 6.4% (.EXE) Win64 Executable (generic) (6522/11/2) 4.4% (.EXE) Win32 Executable (generic) (4504/4/1) 2.0% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika	pebin
dhash icon	c44484ad8d8aa444 (8 x SnakeKeylogger, 3 x AgentTesla, 3 x Formbook)
Reporter	adrian__luca
Tags:	exe MassLogger

Intelligence

File Origin

# of uploads :

# of downloads :

147

Origin country :

Vendor Threat Intelligence

Details

Link:

https://research.acce.ciphertechsolutions.com/results/40089fcf-ab27-4074-be60-f5c5e1f31195/

Detection:

PhantomStealer

Link:

https://www.capesandbox.com/analysis/84976/

Verdict:

Malicious

Score:

96.5%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6ac97608874bb415d07c9565

Tags:

virus micro msil

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Launching a service

Сreating synchronization primitives

Creating a file in the %AppData% directory

Enabling the 'hidden' option for recently created files

Adding an access-denied ACE

Unauthorized injection to a recently created process

Restart of the analyzed sample

Creating a file

Using the Windows Management Instrumentation requests

DNS request

Connection attempt

Sending a custom TCP request

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

Verdict:

Malicious

Labled as:

Trojan.Generic

Link:

https://www.hybrid-analysis.com/sample/b4a3fbc0f286f44bd854033fc15abebe2206344cc930ff715ae115047d963a09

Verdict:

Malicious

File Type:

exe x32

First seen:

2026-08-27T04:09:00Z UTC

Last seen:

2026-09-12T09:52:00Z UTC

Hits:

~100

Link:

https://opentip.kaspersky.com/b4a3fbc0f286f44bd854033fc15abebe2206344cc930ff715ae115047d963a09/results?tab=lookup

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/53ade897-932a-4784-8923-1e07b44fe0e6

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/b4a3fbc0f286f44bd854033fc15abebe2206344cc930ff715ae115047d963a09

Verdict:

inconclusive

YARA:

5 match(es)

Tags:

.Net Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.44 Win 32 Exe x86

Link:

https://app.malva.re/file/8da189f7c2ce6234f1e7ee8f0c33573e

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/b4a3fbc0f286f44bd854033fc15abebe2206344cc930ff715ae115047d963a09/

Threat name:

Win32.Trojan.NegaStealer

Status:

Malicious

First seen:

2026-08-27 06:55:43 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

27 of 36 (75.00%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=wsr7xqhsq32exwcuam74cwv6xyramncmzeyp64k24ekqi7mwhieq._file

Verdict:

malicious

Label(s):

PhantomStealer

Link:

https://reports.threatray.com/818c1d07-d9f0-4fd4-93c6-a6a7481b4f7c

Result

Malware family:

n/a

Score:

8/10

Tags:

collection discovery execution persistence spyware stealer

Link:

https://tria.ge/reports/260910-rpnvnavcqa/

Behaviour

Checks processor information in registry

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

outlook_office_path

System Location Discovery: System Language Discovery

SmartAssembly .NET packer

Suspicious use of SetThreadContext

Accesses Microsoft Outlook profiles

Adds Run key to start application

Looks up external IP address via web service

Executes dropped EXE

Reads user/profile data of web browsers

Command and Scripting Interpreter: PowerShell

Unpacked files

SH256 hash:

b4a3fbc0f286f44bd854033fc15abebe2206344cc930ff715ae115047d963a09

MD5 hash:

8da189f7c2ce6234f1e7ee8f0c33573e

SHA1 hash:

4e9c93fc20bf8f804b9651dc901addce23b2832e

Link:

https://www.unpac.me/results/539bd9b0-88c7-421a-848a-8b5abb38c40d/

SH256 hash:

8f2532eeddf4abb3b6cb19d1921d4a1973e82bda6ca199f5800ca40360e9ab58

MD5 hash:

db3090e87c3ef3be17a1aebeccf762c0

SHA1 hash:

3c1a8b899eab380e413b9b6fd2406ed097ab5abc

Detections:

SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24

Link:

https://www.unpac.me/results/539bd9b0-88c7-421a-848a-8b5abb38c40d/

SH256 hash:

2b0a3e1c220e8a98eb358a391da117b853882e411df4c9bbf54acc7ae629061f

MD5 hash:

38181717c94e497221567b84b23a75d0

SHA1 hash:

48332b950e1ee5fb10c3ee5eb8705e01e603edda

Detections:

INDICATOR_EXE_Packed_SmartAssembly

Link:

https://www.unpac.me/results/539bd9b0-88c7-421a-848a-8b5abb38c40d/

Parent samples :
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SH256 hash:

49d04b30567368e9e06b193d5d0167d4bf8d75f4b9aef42d398e2dd40bd39d89

MD5 hash:

31b28486fdcb0ec2b52738a8c39b66d4

SHA1 hash:

6620bf3f6fc8403734c49360b3614910656679f8

Detections:

triage_net_infostealer_wsh

triage_vidar_infostealer

win_masslogger_w0

cn_utf8_windows_terminal

INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

INDICATOR_SUSPICIOUS_Binary_References_Browsers

INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store

INDICATOR_SUSPICIOUS_EXE_RegKeyComb_DisableWinDefender

INDICATOR_SUSPICIOUS_EXE_SandboxComputerNames

INDICATOR_SUSPICIOUS_EXE_SandboxUserNames

Link:

https://www.unpac.me/results/539bd9b0-88c7-421a-848a-8b5abb38c40d/

Malware family:

PhantomStealer

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/b4a3fbc0f286/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/b4a3fbc0f286f44bd854033fc15abebe2206344cc930ff715ae115047d963a09

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:	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__QueryInfo 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:	FreddyBearDropper Create hunting rule
Author:	Dwarozh Hoshiar
Description:	Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.

Rule name:	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs Create hunting rule
Author:	ditekSHen
Description:	Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs.

Rule name:	INDICATOR_SUSPICIOUS_Binary_References_Browsers Create hunting rule
Author:	ditekSHen
Description:	Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

Rule name:	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

Rule name:	INDICATOR_SUSPICIOUS_EXE_RegKeyComb_DisableWinDefender Create hunting rule
Author:	ditekSHen
Description:	Detects executables embedding registry key / value combination indicative of disabling Windows Defender features

Rule name:	INDICATOR_SUSPICIOUS_EXE_SandboxComputerNames Create hunting rule
Author:	ditekSHen
Description:	Detects executables containing possible sandbox analysis VM names

Rule name:	INDICATOR_SUSPICIOUS_EXE_SandboxUserNames Create hunting rule
Author:	ditekSHen
Description:	Detects executables containing possible sandbox analysis VM usernames

Rule name:	Macos_Infostealer_Wallets_8e469ea0 Create hunting rule
Author:	Elastic Security

Rule name:	malware_PhantomStealer Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	phantom stealer

Rule name:	masslogger_gcch Create hunting rule
Author:	govcert_ch

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

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

Rule name:	pe_imphash Create hunting rule

Rule name:	RANSOMWARE Create hunting rule
Author:	ToroGuitar

Rule name:	Skystars_Malware_Imphash Create hunting rule
Author:	Skystars LightDefender
Description:	imphash

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:	TelegramAPIMalware_PowerShell_EXE Create hunting rule
Author:	@polygonben
Description:	Hunting for pwsh malware using Telegram for C2

Rule name:	telegram_bot_api Create hunting rule
Author:	rectifyq
Description:	Detects file containing Telegram Bot API

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.

Rule name:	win_masslogger_w0 Create hunting rule
Author:	govcert_ch

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/84976/

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