MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f91e05ca439cfe5e0e7bc5d552d9157ab449c10cd0680e6cdd1d038a3eba687c. 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 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f91e05ca439cfe5e0e7bc5d552d9157ab449c10cd0680e6cdd1d038a3eba687c
SHA3-384 hash: 41d97dcdb1dd3fa55b8659aed5018e904b1228d114afec03e0f81d0efa3e5e5b3e70d8099835ec2c10cc6db9a9018ffe
SHA1 hash: ce48b787f4d52ac7a3b72db0cf99ecfa8f00edff
MD5 hash: 42d18d9a8fb5e9859a230bdd92b0bbd0
humanhash: grey-maine-vegan-tango
File name:f91e05ca439cfe5e0e7bc5d552d9157ab449c10cd0680e6cdd1d038a3eba687c
Download: download sample
Signature MassLogger
Create hunting rule
File size:520'192 bytes
First seen:2025-06-10 11:15:49 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:igDB6ydN1stv/dCCdzPMscwZLVEvZMwXDFVhZNla/D:iWU3dDMQZLebfhZb
Threatray 3'410 similar samples on MalwareBazaar
TLSH T143B4025947BAD603C8A617F81772D1B423B5AECEE862D70B8FD8ACE772677101680347
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 8271f0d4d4e87192 (10 x Formbook, 9 x SnakeKeylogger, 9 x MassLogger)
Reporter adrian__luca
Tags:exe MassLogger

Intelligence

File Origin
# of uploads :
1
# of downloads :
358
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
30052025_1552_29052025_po.no.00051.PDF.gz
Verdict:
Suspicious activity
Analysis date:
2025-05-30 15:59:03 UTC
Tags:
arch-exec
Link:
https://app.any.run/tasks/1ea1be6d-555e-4c08-bdf8-7f530d569226

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/8729/
Verdict:
Malicious
Score:
81.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6848141707b5e8c1cfe615dc
Tags:
agenttesla snake
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Launching a process
Creating a file
DNS request
Connection attempt
Unauthorized injection to a system process
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/f91e05ca439cfe5e0e7bc5d552d9157ab449c10cd0680e6cdd1d038a3eba687c
Malware family:
Snake Keylogger
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/4addac15-1761-40f1-baf8-e6cf62f59899
Result
Threat name:
MSIL Logger, MassLogger RAT
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1710787
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Contains functionality to log keystrokes (.Net Source)
Found malware configuration
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious 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)
Uses threadpools to delay analysis
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected MassLogger RAT
Yara detected MSIL Logger
Yara detected Telegram RAT
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/f91e05ca439cfe5e0e7bc5d552d9157ab449c10cd0680e6cdd1d038a3eba687c
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f91e05ca439cfe5e0e7bc5d552d9157ab449c10cd0680e6cdd1d038a3eba687c/
Threat name:
Win32.Trojan.Leonem
Create hunting rule
Status:
Malicious
First seen:
2025-05-29 10:08:20 UTC
File Type:
PE (.Net Exe)
Extracted files:
8
AV detection:
27 of 36 (75.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7epalssdtt7f4dt3yxkvfwivpk2etqim2bua43g5dubyupv2nb6a._file
Verdict:
malicious
Label(s):
unc_loader_037
Create hunting rule
novastealer
Create hunting rule
Similar samples:
4d8477bb47317c981e8c8f103f4596afa3e6b126937528e09285e0570c5a7297
MassLogger
6b4806d8340c94dbe9879d05144f0bd492ce7614bf7827764f9c8f4094c12687
MassLogger
9c7a2e9b06bfe9bc9a56105abcbcdb0b59a26071be4debe8e2a5581c832c6e96
MassLogger
9ce56eb86c2bfcfcbca94a27e0632fcfda0660a44c6962c68d1ad02355a1850e
MassLogger
+ 3'400 additional samples on MalwareBazaar
Result
Malware family:
masslogger
Create hunting rule
Score:
  10/10
Tags:
family:masslogger collection discovery spyware stealer
Link:
https://tria.ge/reports/250610-nc91ksdk71/
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
MassLogger
Masslogger family
Verdict:
Malicious
Tags:
404keylogger
YARA:
n/a
Link:
https://app.threat.zone/submission/28213c28-e53e-47cf-b16d-e0bb83445cd5
Unpacked files
SH256 hash:
f91e05ca439cfe5e0e7bc5d552d9157ab449c10cd0680e6cdd1d038a3eba687c
MD5 hash:
42d18d9a8fb5e9859a230bdd92b0bbd0
SHA1 hash:
ce48b787f4d52ac7a3b72db0cf99ecfa8f00edff
Link:
https://www.unpac.me/results/786ca48b-e1aa-479a-a9c4-be9f3391309f/
SH256 hash:
7330fe1b40667d8ca67394f472d151f08abc0774a6d5b1b064bc6f26463a0244
MD5 hash:
bbf2b7752065c505815ffef5dc70f676
SHA1 hash:
39810436a474a614f136acc140e60c09ab7e955e
Detections:
win_404keylogger_g1
Create hunting rule
win_masslogger_w0
Create hunting rule
MAL_Envrial_Jan18_1
Create hunting rule
INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_TelegramChatBot
Create hunting rule
Link:
https://www.unpac.me/results/786ca48b-e1aa-479a-a9c4-be9f3391309f/
Parent samples :
d7fde69a82dd7aabc7582e97f6906ff0ee92ed4ead6a2486d7c19c6807206a9d
f91e05ca439cfe5e0e7bc5d552d9157ab449c10cd0680e6cdd1d038a3eba687c
baa7fa2f8240a086a67d051d75a007f1d015fab766b850e6cac60533323b6d85
SH256 hash:
9e11978a92be19092136c64c83ab9ef4a5273b1d9f34d5287263b42ea68d6958
MD5 hash:
eaf69e05aeb9a3a33f016e8f1744a7c1
SHA1 hash:
94adb39207be08673e7378e28b881707582272b4
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Link:
https://www.unpac.me/results/786ca48b-e1aa-479a-a9c4-be9f3391309f/
Parent samples :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 hash:
c31c1a9d76208ac9c0c6ca616251cf28a8e9bfffd6b5f84a12024a3b40f158c5
MD5 hash:
78af0127c0b1c335df3750c1b4bd9718
SHA1 hash:
9f6c719e95c0951c5e16237886c767f67d204d1c
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/786ca48b-e1aa-479a-a9c4-be9f3391309f/
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: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: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)

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/8729/

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
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

Comments