MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b3ed5cefa81dc79adf5fc75cbe448da1b89f9937e642fac40b4295714d2aad3. 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: 15

Intelligence 15 IOCs YARA 17 File information Comments

SHA256 hash:	4b3ed5cefa81dc79adf5fc75cbe448da1b89f9937e642fac40b4295714d2aad3
SHA3-384 hash:	dfa7481680ca8f3786b99b3f298669bb330d9aac85a90efc9d0176b745c1630ee3889c0e29ac757f0487760fe1bb5b21
SHA1 hash:	3b2654716b58eeeff018a4b612ceb19d13deb872
MD5 hash:	e9f9b3542e0a5c105a2828fbede30785
humanhash:	pizza-juliet-idaho-double
File name:	SecuriteInfo.com.Win32.CrypterX-gen.17934.32462
Download:	download sample
Signature	MassLogger Create hunting rule
File size:	654'856 bytes
First seen:	2025-04-07 03:25:57 UTC
Last seen:	2025-04-07 04:30:40 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep	12288:IYrYqBCCwf2Bj0WveLrlpXPmE1PWhkOex4u9kR:8fAjjeLrlpXuE1urV
Threatray	835 similar samples on MalwareBazaar
TLSH	T161D4E0A43268DD23D1BA47F10960D37407B6EE9D6920D3CACEE66CDBB8E4F011A50767
TrID	71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.2% (.EXE) Win64 Executable (generic) (10522/11/4) 6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.3% (.EXE) Win32 Executable (generic) (4504/4/1) 2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika	pebin
dhash icon	0068617171617000 (6 x SnakeKeylogger, 2 x MassLogger, 2 x AgentTesla)
Reporter	SecuriteInfoCom
Tags:	exe MassLogger

Intelligence

File Origin

# of uploads :

# of downloads :

524

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

SecuriteInfo.com.Win32.CrypterX-gen.17934.32462

Verdict:

Malicious activity

Analysis date:

2025-04-07 03:27:05 UTC

Tags:

netreactor snake keylogger stealer evasion ims-api generic

Link:

https://app.any.run/tasks/b23c1c0b-869d-4e4d-a800-db9c9383971e

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/952/

Detection(s):

SecuriteInfo.com.Win32.CrypterX-gen.16546.20163.UNOFFICIAL

Verdict:

Malicious

Score:

94.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=67f34602e011fe619fabcc51

Tags:

injection spawn shell

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Creating a window

Сreating synchronization primitives

Creating a process with a hidden window

Creating a file in the %AppData% directory

Enabling the 'hidden' option for recently created files

Adding an access-denied ACE

Creating a file in the %temp% directory

Launching a process

Unauthorized injection to a recently created process

Restart of the analyzed sample

Creating a file

DNS request

Connection attempt

Sending an HTTP GET request

Sending a custom TCP request

Reading critical registry keys

Adding an exclusion to Microsoft Defender

Enabling autorun by creating a file

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/4b3ed5cefa81dc79adf5fc75cbe448da1b89f9937e642fac40b4295714d2aad3

Malware family:

Snake Keylogger

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/1d013f9b-605f-4966-9559-65fdaa221e95

Result

Threat name:

MSIL Logger, MassLogger RAT, PureLog Ste

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1657987

Signature

.NET source code contains method to dynamically call methods (often used by packers)

.NET source code contains potential unpacker

.NET source code references suspicious native API functions

Adds a directory exclusion to Windows Defender

Changes security center settings (notifications, updates, antivirus, firewall)

Contains functionality to log keystrokes (.Net Source)

Found malware configuration

Injects a PE file into a foreign processes

Joe Sandbox ML detected suspicious sample

Loading BitLocker PowerShell Module

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet

Sigma detected: Scheduled temp file as task from temp location

Tries to detect the country of the analysis system (by using the IP)

Tries to harvest and steal browser information (history, passwords, etc)

Tries to steal Mail credentials (via file / registry access)

Uses schtasks.exe or at.exe to add and modify task schedules

Yara detected AntiVM3

Yara detected MassLogger RAT

Yara detected MSIL Logger

Yara detected PureLog Stealer

Yara detected Telegram RAT

Behaviour

Behavior Graph:

Download SVG

Score:

95%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/4b3ed5cefa81dc79adf5fc75cbe448da1b89f9937e642fac40b4295714d2aad3

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/4b3ed5cefa81dc79adf5fc75cbe448da1b89f9937e642fac40b4295714d2aad3/

Threat name:

Win32.Infostealer.Generic

Status:

Suspicious

First seen:

2025-04-07 03:15:52 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

13 of 24 (54.17%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=jm7nltx2qhohtlpv7r24xzci3inyt6mtpzsc7lcawquvofgsvljq._file

Verdict:

malicious

Label(s):

unc_loader_037

novastealer

MassLogger

4b3ed5cefa81dc79adf5fc75cbe448da1b89f9937e642fac40b4295714d2aad3

MassLogger

8337a1c0c50f95b4e6f8ced766b5b8817c2bbd4f9ee1e71c275c6a025cefab7b

MassLogger

b6d1bbc15f5ae144e4801f8188cbe4768f3ba42e2c4dd56f42a7fa5ec9638460

MassLogger

error

MassLogger

f516f567dbc6fcd2d2cfa614503022f0dee6ecf7014796b7ba8945eecf02314e

MassLogger

+ 825 additional samples on MalwareBazaar

Result

Malware family:

n/a

Score:

8/10

Tags:

collection discovery execution spyware stealer

Link:

https://tria.ge/reports/250407-dy81aszlw8/

Behaviour

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

outlook_office_path

outlook_win_path

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Suspicious use of SetThreadContext

Accesses Microsoft Outlook profiles

Looks up external IP address via web service

Checks computer location settings

Reads user/profile data of local email clients

Reads user/profile data of web browsers

Command and Scripting Interpreter: PowerShell

Verdict:

Malicious

Tags:

404keylogger

YARA:

n/a

Link:

https://app.threat.zone/submission/9c3a702d-3b04-4a3e-b799-861c97a3ef4c

Unpacked files

SH256 hash:

4b3ed5cefa81dc79adf5fc75cbe448da1b89f9937e642fac40b4295714d2aad3

MD5 hash:

e9f9b3542e0a5c105a2828fbede30785

SHA1 hash:

3b2654716b58eeeff018a4b612ceb19d13deb872

Link:

https://www.unpac.me/results/4c58e1a7-452f-4d61-89c4-53dd91a996a6/

SH256 hash:

77a072f8d641a0eb051a6d2266052b63d8c9d30eda86b39e823544824f9c3c02

MD5 hash:

d51b19c43672ba39ce5bdbcd2b4bccdb

SHA1 hash:

63fa95e05e87d1bc4cc8b13176cce8d5fc482276

Detections:

win_404keylogger_g1

win_masslogger_w0

MAL_Envrial_Jan18_1

INDICATOR_SUSPICIOUS_Binary_References_Browsers

INDICATOR_SUSPICIOUS_EXE_TelegramChatBot

Link:

https://www.unpac.me/results/4c58e1a7-452f-4d61-89c4-53dd91a996a6/

Parent samples :

425397d3fa010ac45d55deae6d844054bd0749c64b4b731ced34f1e5d4bfc514
3324d8b4800573fb4561832dad50f8041c0f8fe6da803c8c10a43e4155ffd8b7
4b3ed5cefa81dc79adf5fc75cbe448da1b89f9937e642fac40b4295714d2aad3
42cd6c3cc45e612b61212bf371842e76252fd1230397ebf46cda8cf2fd68a9e2
28014eac5aec5ce9c4a2f6e162021bb5ac6fe3fea7b1eeb7bb2093d97afc2a98
ef31c771e1f44656fdc9e84c3745d8bef369879697c144110edac6b814878ee3
9fb47b33659773bb9ac4b4c224f9dfda0152f8a062a4d73f2e22c6db694e3473
861b9d85f642873dd0f034f6f946e3791c4cf94c6687527320d26a2f217fa04c
15bfc047dc5728762fff3022cc31477614834a05dbf83f16a639e6db1034ab72
c7de64db20145557f5070412a4e15d4d2a00487974e8fce0f4bc3ee42999bd04
fec56617a813954d1022f62e9b2755711fac4b5cdc6e1caa445aca1f279bd324
ed9560d7b80ecab2224cf3bc6f60f11108e75f73df736939e3c3a1d4e2d38300

SH256 hash:

ee7032238f0919ef9117b8db53cde26307aab12e805ed03e5f91f46e1c6b202c

MD5 hash:

14656e788066953c2b80c767e6989cbf

SHA1 hash:

d98501bdecb325d582b307fb390a47a820314178

Detections:

SUSP_OBF_NET_Reactor_Indicators_Jan24

Link:

https://www.unpac.me/results/4c58e1a7-452f-4d61-89c4-53dd91a996a6/

Parent samples :

0b86f67432c508c03c341e3e1d7b9418c63145eda3f02ae550a95605be6a03e0
8c3a0f760deceeb69b81b809d2a16cb2ff5979f4b332fc4243eed61fb2111e17
4b3ed5cefa81dc79adf5fc75cbe448da1b89f9937e642fac40b4295714d2aad3

SH256 hash:

62077a4f769b9626dd076141c81e9279fea715212fa917e80b274b6f79f5490b

MD5 hash:

388995eac4c7fce29d35e20353435491

SHA1 hash:

f545e27e87a9516fff220947812024533d89edea

Detections:

SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24

SUSP_OBF_NET_Reactor_Indicators_Jan24

Link:

https://www.unpac.me/results/4c58e1a7-452f-4d61-89c4-53dd91a996a6/

Malware family:

zgRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/4b3ed5cefa81/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/4b3ed5cefa81dc79adf5fc75cbe448da1b89f9937e642fac40b4295714d2aad3

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:	crime_snake_keylogger Create hunting rule
Author:	Rony (r0ny_123)
Description:	Detects Snake keylogger payload

Rule name:	INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438 Create hunting rule
Author:	ditekSHen
Description:	Detects executables signed with stolen, revoked or invalid certificates

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_TelegramChatBot Create hunting rule
Author:	ditekSHen
Description:	Detects executables using Telegram Chat Bot

Rule name:	MAL_Envrial_Jan18_1 Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects Encrial credential stealer malware
Reference:	https://twitter.com/malwrhunterteam/status/953313514629853184

Rule name:	MAL_Envrial_Jan18_1_RID2D8C Create hunting rule
Author:	Florian Roth
Description:	Detects Encrial credential stealer malware
Reference:	https://twitter.com/malwrhunterteam/status/953313514629853184

Rule name:	masslogger_gcch Create hunting rule
Author:	govcert_ch

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

Rule name:	PE_Digital_Certificate Create hunting rule
Author:	albertzsigovits

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_Obf_Enc_Spoof_Hide_PE Create hunting rule
Author:	XiAnzheng
Description:	Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

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

Rule name:	Windows_Trojan_SnakeKeylogger_af3faa65 Create hunting rule
Author:	Elastic Security

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/952/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (HIGH_ENTROPY_VA)	high

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