MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8c4b3e92aed63d09e3880db4cc04907906a6e89cf72aa91cba37ff4e0e460e83. 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: 7


Intelligence 7 IOCs YARA 31 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8c4b3e92aed63d09e3880db4cc04907906a6e89cf72aa91cba37ff4e0e460e83
SHA3-384 hash: cd8ccab87dbb00336f8b8f7b766511512943c7acad7a23b073dfffd2d351d609c3e51644ba0dd3af8760ac891b0a9044
SHA1 hash: 7cf1e08cc5723c72423f19a1b1683e943c97bbb7
MD5 hash: 207260db35dbaf93d07e076082e02736
humanhash: coffee-whiskey-romeo-wolfram
File name:Vessel Particulars.js
Download: download sample
Signature MassLogger
Create hunting rule
File size:3'644'039 bytes
First seen:2026-08-12 08:04:15 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 24576:w5XpmV3yB+JWKtX7enTxcVUPx6WM3cQRGd1LOZ7f:w5XsV3evC7Yv0r/RGdpOZ7f
TLSH T120F52A9637DF354939103358DD8C40144FAF807A9B26639670DA0BFCAF9F04A95E4AAF
Magika javascript
Reporter abuse_ch
Tags:js MassLogger


Avatar
abuse_ch
MassLogger SMTP exfil server:
plazamassima.com:587

Intelligence

File Origin
# of uploads :
1
# of downloads :
112
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm aspnet_compiler base64 downloader encrypted evasive evasive fingerprint lolbin obfuscated obfuscated powershell reconnaissance repaired
Link:
https://www.filescan.io/uploads/6a7c296a62e620dae1d9e78d/reports/81c273fe-6d99-492e-84a8-fa58db64dfaf/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/8c4b3e92aed63d09e3880db4cc04907906a6e89cf72aa91cba37ff4e0e460e83
Verdict:
Malicious
File Type:
js
First seen:
2026-08-12T00:24:00Z UTC
Last seen:
2026-08-12T04:53:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/8c4b3e92aed63d09e3880db4cc04907906a6e89cf72aa91cba37ff4e0e460e83/results?tab=lookup
Result
Threat name:
KeyLogger, MicroClip, Phantom stealer, T
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1956679
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Bypasses PowerShell execution policy
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Injects a PE file into a foreign processes
JavaScript file contains suspicious strings
JavaScript source code contains functionality to generate code involving a shell, file or stream
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
WScript reads language and country specific registry keys (likely country aware script)
Wscript starts Powershell (via cmd or directly)
Yara detected AntiVM3
Yara detected chromElevator
Yara detected Keylogger Generic
Yara detected MicroClip
Yara detected Phantom stealer
Yara detected Powershell decode and execute
Yara detected Telegram RAT
Yara detected TrojanRansom
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1956679 Sample: Vessel Particulars.js Startdate: 12/08/2026 Architecture: WINDOWS Score: 100 37 plazamassima.com 2->37 39 release-assets.githubusercontent.com 2->39 41 github.com 2->41 49 Found malware configuration 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 Multi AV Scanner detection for submitted file 2->53 55 13 other signatures 2->55 10 wscript.exe 3 2->10         started        signatures3 process4 file5 35 C:\Temp\ps_ZojV0BiOIxnu_1786526849679.ps1, ASCII 10->35 dropped 67 Suspicious powershell command line found 10->67 69 Wscript starts Powershell (via cmd or directly) 10->69 71 Bypasses PowerShell execution policy 10->71 73 3 other signatures 10->73 14 powershell.exe 16 10->14         started        17 taskkill.exe 1 10->17         started        signatures6 process7 signatures8 75 Writes to foreign memory regions 14->75 77 Suspicious execution chain found 14->77 79 Injects a PE file into a foreign processes 14->79 19 aspnet_compiler.exe 15 3 14->19         started        23 aspnet_compiler.exe 14->23         started        25 conhost.exe 14->25         started        29 4 other processes 14->29 27 conhost.exe 17->27         started        process9 dnsIp10 43 plazamassima.com 185.14.57.27, 49713, 587 S4N-ASES Spain 19->43 45 github.com 140.82.113.3, 443, 49710 GITHUB-GitHubIncUS United States 19->45 47 release-assets.githubusercontent.com 185.199.108.133, 443, 49711 FASTLY-FastlyIncUS United States 19->47 57 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 19->57 59 Tries to steal Mail credentials (via file / registry access) 19->59 61 Found many strings related to Crypto-Wallets (likely being stolen) 19->61 65 3 other signatures 19->65 31 RegAsm.exe 2 19->31         started        63 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 23->63 signatures11 process12 process13 33 conhost.exe 31->33         started       
Score:
99%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/8c4b3e92aed63d09e3880db4cc04907906a6e89cf72aa91cba37ff4e0e460e83
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/8c4b3e92aed63d09e3880db4cc04907906a6e89cf72aa91cba37ff4e0e460e83/
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=rrft5evo2y6qty4ibw2mybeqpedkn2e464vkshf2g77u4dsgb2bq._file
Result
Malware family:
phantom_stealer
Create hunting rule
Score:
  10/10
Tags:
family:phantom_stealer collection defense_evasion discovery execution stealer
Link:
https://tria.ge/reports/260812-jzh36ayydw/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
ConfuserEx .NET packer
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Command and Scripting Interpreter: PowerShell
Downloads MZ/PE file
Family: PhantomStealer
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:Base64_Encoded_Powershell_Directives
Create hunting rule
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.

Comments