MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f71c420f6b519456fe106dab4189e77d8049c9e0296483af32088de50905446a. 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 17 File information Comments

SHA256 hash:	f71c420f6b519456fe106dab4189e77d8049c9e0296483af32088de50905446a
SHA3-384 hash:	352213aa633d4d061c64ac836c065970bd297588e4b081efadb5298eb743fe3db693afb029581bf68baf373c0e81ab5c
SHA1 hash:	96ece2f7db81bc6129877a96017f5a5083fa0bee
MD5 hash:	519fdd8387105f1964c8baf6ab3ba86e
humanhash:	hot-lion-maine-kentucky
File name:	Ref50102607UUU.exe
Download:	download sample
Signature	MassLogger Create hunting rule
File size:	225'792 bytes
First seen:	2025-01-21 22:41:27 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep	3072:mY/7gMFIe6IPdRTJ7mL6y7Aa3C41+QlpJNEfjQK3j5Fjv0TphLmVVtRH:x7g5eHPdRTJ7o6y1y41+GslvML
Threatray	190 similar samples on MalwareBazaar
TLSH	T1DA2407E6AEB5831EC8750A7DA2B905EC05366D763A13BFD8FF04F905260367C8C52B25
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
Reporter	threatcat_ch
Tags:	exe MassLogger

Intelligence

File Origin

# of uploads :

# of downloads :

2'501

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

Ref50102607UUU.exe

Verdict:

Malicious activity

Analysis date:

2025-01-22 00:56:57 UTC

Tags:

snake keylogger evasion stealer ims-api generic

Link:

https://app.any.run/tasks/40779ddb-e946-4b76-b632-51f4d821e839

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Verdict:

Clean

Score:

89.3%

Link:

https://cyber-fortress.com/docs/result/index.php?id=679024f3b5602ee8cdaed37d

Tags:

n/a

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Launching a process

Сreating synchronization primitives

DNS request

Connection attempt

Sending an HTTP GET request

Sending a custom TCP request

Creating a file

Reading critical registry keys

Unauthorized injection to a system process

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

obfuscated packed packed packer_detected

Link:

https://www.filescan.io/uploads/679022bcb9f19949fee8cbfc/reports/100952da-0d90-45c9-a1fd-d8b41fb65570/overview

Verdict:

Malicious

Labled as:

Bulz.Generic

Link:

https://www.hybrid-analysis.com/sample/f71c420f6b519456fe106dab4189e77d8049c9e0296483af32088de50905446a

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Malware family:

Snake Keylogger

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/954d5ce3-a563-4f05-8c88-af65f1301c5f

Result

Threat name:

MassLogger RAT

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1596319

Signature

.NET source code references suspicious native API functions

AI detected suspicious sample

Antivirus / Scanner detection for submitted sample

Contains functionality to log keystrokes (.Net Source)

Found malware configuration

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

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)

Yara detected AntiVM3

Yara detected MassLogger RAT

Yara detected Telegram RAT

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/f71c420f6b519456fe106dab4189e77d8049c9e0296483af32088de50905446a

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/f71c420f6b519456fe106dab4189e77d8049c9e0296483af32088de50905446a/

Threat name:

Win32.Exploit.MassLoggerRAT

Status:

Malicious

First seen:

2025-01-21 22:29:01 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

24 of 38 (63.16%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=64oeed3lkgkfn7qqnwvudcphpwaetspaffsihlzsbcg6kcifirva._file

Verdict:

malicious

Label(s):

snakekeylogger

MassLogger

8eb955d1794fe1fd4c8e9bd91c280a69e09c11a9673c3e0fa2312a27520b3eb5

MassLogger

abc0b5e65132918208e06122ecfe2172c468494da7b0e48cc40f8475138153b2

MassLogger

b16a07537092452ea8939b87bb8eaced5dad19fa44f93146e4ba8d8bd943dc83

MassLogger

b1e3a6d51db48a05f1d5022fd98fd544cd64af54db335e11fd229c45a6fb4a8d

MassLogger

error

MassLogger

f81e245a9e66e87936a2a6f09a71eec5014c2488a8cef657c9227d46f4588957

MassLogger

+ 180 additional samples on MalwareBazaar

Result

Malware family:

n/a

Score:

7/10

Tags:

collection discovery spyware stealer

Link:

https://tria.ge/reports/250121-2mm6fsvkfs/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

outlook_office_path

outlook_win_path

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Accesses Microsoft Outlook profiles

Looks up external IP address via web service

Reads user/profile data of local email clients

Reads user/profile data of web browsers

Verdict:

Suspicious

Tags:

404keylogger

YARA:

n/a

Link:

https://app.threat.zone/submission/a795d156-b0f1-48e9-b378-85cc773f1217

Unpacked files

SH256 hash:

be39e38f0593f64eae82c62182fb24aec6c274cc7f50d247bc7b61a4ecf3b093

MD5 hash:

c2659425c5eda654cd617ba037c5dd2c

SHA1 hash:

8fa93666b87c544ca6071bf176a3a026a4e26d36

Detections:

win_masslogger_w0

win_404keylogger_g1

MAL_Envrial_Jan18_1

INDICATOR_SUSPICIOUS_Binary_References_Browsers

INDICATOR_SUSPICIOUS_EXE_TelegramChatBot

Link:

https://www.unpac.me/results/eb2388a3-3e88-4488-9f5a-eb89b594465e/

Parent samples :

991b1c3d3b28f8f10aa56078b6cb84411acfce44ba84345a939ea80554550d3e
2578fed47caff2eefa4dda53358de9e0b1fd7835edcf54e3f99dac7dae759a82
2db439bbe2b7772dd99a190c9549f8ee3d449db2a1cf3d7a43b2cf729adcfc85
394bbb731e60c8b58adeb640b3f22dd6c02a92a61567df4d1b3db11f0e5be2c1
f71c420f6b519456fe106dab4189e77d8049c9e0296483af32088de50905446a

SH256 hash:

e8ebfda634e10c24642537582e256449074acdf2ac5ea827b81818c111111993

MD5 hash:

5b29dbce9331e1456dcac2b8f087dfd2

SHA1 hash:

702f2aef816d7ed31559640a56919a19c0c9cc51

Link:

https://www.unpac.me/results/eb2388a3-3e88-4488-9f5a-eb89b594465e/

SH256 hash:

ae9eba2eb22435565d2a9f11a44346f612cf28d823dc9c84ae6acd40793e3577

MD5 hash:

bec920b0524e72c39400dbbfd397eb97

SHA1 hash:

65dab74482daef662de1f15618ca26e061993e7a

Link:

https://www.unpac.me/results/eb2388a3-3e88-4488-9f5a-eb89b594465e/

SH256 hash:

f71c420f6b519456fe106dab4189e77d8049c9e0296483af32088de50905446a

MD5 hash:

519fdd8387105f1964c8baf6ab3ba86e

SHA1 hash:

96ece2f7db81bc6129877a96017f5a5083fa0bee

Link:

https://www.unpac.me/results/eb2388a3-3e88-4488-9f5a-eb89b594465e/

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/f71c420f6b51/report/overview.html

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

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_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:	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_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.

Malspam

MassLogger

exe f71c420f6b519456fe106dab4189e77d8049c9e0296483af32088de50905446a

(this sample)

Delivery method

Distributed via e-mail attachment

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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