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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a237a8b0d6af75b029817b6aa0efcb81d0caaa84d43ccb77b43c3689ee981ede. 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: 11


Intelligence 11 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a237a8b0d6af75b029817b6aa0efcb81d0caaa84d43ccb77b43c3689ee981ede
SHA3-384 hash: cd924f9bf83f57ca474baa41879fbffad112e46bf9322d210c81661edf2ae3ddf97481a5c4c3c3ab765e7782114e89a8
SHA1 hash: e4ad562f63085f07d633d368c3855a82777eb386
MD5 hash: 0b8a81762d880eca1e501a32c260c15d
humanhash: delaware-romeo-hydrogen-maine
File name:faktury.pdf.js
Download: download sample
Signature MassLogger
Create hunting rule
File size:504'631 bytes
First seen:2026-10-08 19:26:12 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 6144:VcGjdp4BplVlJ+ZHBf9FXfxk+/I2tw8nYqbfUhF3lSgMjtj6NPcZuP9o/7FyBSS/:jjdp4BpNE15x3ksgXcVj6NPcZGCzQmw
TLSH T19FB4C0942E06E1904C6D47E25A2F3F08E0F5D796F5CFA6AA4104F7B12B3E757867AC08
Magika txt
Reporter abuse_ch
Tags:js MassLogger

Intelligence

File Origin
# of uploads :
1
# of downloads :
163
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.Other.Malware-gen.87667479.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
attrib evasive masquerade obfuscated powershell repaired
Link:
https://www.filescan.io/uploads/6ac7ee5d969f6f5907ee1d6a/reports/48a7b3a0-d2d5-4afc-b1a9-4746fa1eefcd/overview
Verdict:
Malicious
Labled as:
JS/Obfuscated.CT trojan
Link:
https://www.hybrid-analysis.com/sample/a237a8b0d6af75b029817b6aa0efcb81d0caaa84d43ccb77b43c3689ee981ede
Verdict:
Malicious
File Type:
js
First seen:
2026-10-08T10:56:00Z UTC
Last seen:
2026-10-10T12:48:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/a237a8b0d6af75b029817b6aa0efcb81d0caaa84d43ccb77b43c3689ee981ede/results?tab=lookup
Result
Threat name:
MSIL Logger, MassLogger RAT
Create hunting rule
Detection:
malicious
Classification:
evad.troj.spyw.expl
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1984487
Signature
.NET source code references suspicious native API functions
Contains functionality to log keystrokes (.Net Source)
Creates an autostart registry key pointing to binary in C:\Windows
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Joe Sandbox ML detected suspicious sample
JScript performs obfuscated calls to suspicious functions
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for submitted file
Overwrites code with unconditional jumps - possibly settings hooks in foreign process
Queues an APC in another process (thread injection)
Sigma detected: Invoke-Obfuscation Via Stdin
Sigma detected: Potential PowerShell Command Line Obfuscation
Sigma detected: Potential WinAPI Calls Via CommandLine
Sigma detected: Powershell launch wmic via class
Sigma detected: Suspicious Parent Double Extension File Execution
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
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)
Unusual module load detection (module proxying)
Uses an obfuscated file name to hide its real file extension (double extension)
Uses attrib.exe to hide files
Uses cmd line tools excessively to alter registry or file data
Windows Scripting host queries suspicious COM object (likely to drop second stage)
WScript reads language and country specific registry keys (likely country aware script)
Wscript starts Powershell (via cmd or directly)
Yara detected MassLogger RAT
Yara detected MSIL Logger
Yara detected Powershell decode and execute
Yara detected Telegram RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1984487 Sample: faktury.pdf.js Startdate: 08/10/2026 Architecture: WINDOWS Score: 100 92 reallyfreegeoip.org 2->92 94 mail.atf-transformer.af 2->94 96 5 other IPs or domains 2->96 104 Sigma detected: Powershell launch wmic via class 2->104 106 Found malware configuration 2->106 108 Malicious sample detected (through community Yara rule) 2->108 112 14 other signatures 2->112 13 wscript.exe 1 1 2->13         started        16 conhost.exe 2->16         started        18 conhost.exe 2->18         started        20 2 other processes 2->20 signatures3 110 Tries to detect the country of the analysis system (by using the IP) 92->110 process4 signatures5 142 JScript performs obfuscated calls to suspicious functions 13->142 144 Wscript starts Powershell (via cmd or directly) 13->144 146 Windows Scripting host queries suspicious COM object (likely to drop second stage) 13->146 148 2 other signatures 13->148 22 cmd.exe 1 13->22         started        25 powershell.exe 8 13->25         started        28 cmd.exe 16->28         started        30 cmd.exe 18->30         started        32 cmd.exe 20->32         started        process6 file7 124 Suspicious powershell command line found 22->124 126 Wscript starts Powershell (via cmd or directly) 22->126 128 Uses cmd line tools excessively to alter registry or file data 22->128 130 Uses attrib.exe to hide files 22->130 34 powershell.exe 22->34         started        36 powershell.exe 15 22->36         started        38 conhost.exe 22->38         started        40 attrib.exe 22->40         started        90 C:\Users\user\AppData\...\141738832950750.cmd, ASCII 25->90 dropped 132 Found suspicious powershell code related to unpacking or dynamic code loading 25->132 42 conhost.exe 25->42         started        44 powershell.exe 28->44         started        46 3 other processes 28->46 48 3 other processes 30->48 50 3 other processes 32->50 signatures8 process9 process10 52 powershell.exe 1 46 34->52         started        56 cmd.exe 44->56         started        file11 84 C:\Users\user\...\dwm_frame_TIBARVXQh.cmd, DOS 52->84 dropped 86 C:\Users\user\...\dwm_frame_NMFHJUYI.cmd, ASCII 52->86 dropped 88 C:\Users\user\AppData\Local\...\dwm_frame.dat, ASCII 52->88 dropped 114 Overwrites code with unconditional jumps - possibly settings hooks in foreign process 52->114 116 Creates an autostart registry key pointing to binary in C:\Windows 52->116 118 Maps a DLL or memory area into another process 52->118 122 2 other signatures 52->122 58 choice.exe 52->58         started        62 conhost.exe 52->62         started        64 WmiPrvSE.exe 52->64         started        120 Wscript starts Powershell (via cmd or directly) 56->120 66 powershell.exe 56->66         started        68 conhost.exe 56->68         started        70 powershell.exe 56->70         started        signatures12 process13 dnsIp14 98 atf-transformer.af 91.204.209.5, 49725, 49729, 587 ENIXLTDGB United Kingdom 58->98 100 checkip.dyndns.com 158.101.44.242, 49723, 49727, 80 ORACLE-BMC-31898-OracleCorporationUS United States 58->100 102 reallyfreegeoip.org 172.67.177.134, 443, 49724, 49728 CLOUDFLARENET-CloudflareIncUS Canada 58->102 138 Tries to steal Mail credentials (via file / registry access) 58->138 140 Unusual module load detection (module proxying) 58->140 72 conhost.exe 58->72         started        74 powershell.exe 66->74         started        signatures15 process16 signatures17 134 Overwrites code with unconditional jumps - possibly settings hooks in foreign process 74->134 136 Maps a DLL or memory area into another process 74->136 77 choice.exe 74->77         started        80 conhost.exe 74->80         started        process18 signatures19 150 Tries to steal Mail credentials (via file / registry access) 77->150 152 Tries to harvest and steal browser information (history, passwords, etc) 77->152 82 conhost.exe 77->82         started        process20
Score:
98%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/a237a8b0d6af75b029817b6aa0efcb81d0caaa84d43ccb77b43c3689ee981ede
Verdict:
inconclusive
YARA:
1 match(es)
Tags:
PowerShell T1059.001
Link:
https://app.malva.re/file/0b8a81762d880eca1e501a32c260c15d
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a237a8b0d6af75b029817b6aa0efcb81d0caaa84d43ccb77b43c3689ee981ede/
Threat name:
Script-BAT.Dropper.Powecod
Create hunting rule
Status:
Malicious
First seen:
2026-10-08 14:11:26 UTC
File Type:
Text (Batch)
AV detection:
10 of 24 (41.67%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ui32rmgwv523akmbpnvkb36lqhimvkue2q6mw55uhq3it3uyd3pa._file
Verdict:
malicious
Label(s):
NovaStealer
Create hunting rule
Link:
https://reports.threatray.com/339e97ba-25b3-4052-8ef1-93e0264e81c2
Result
Malware family:
masslogger
Create hunting rule
Score:
  10/10
Tags:
family:masslogger collection defense_evasion discovery execution persistence privilege_escalation spyware stealer
Link:
https://tria.ge/reports/261008-x5nsgscz8s/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Views/modifies file attributes
outlook_office_path
outlook_win_path
Command and Scripting Interpreter: JavaScript
Command and Scripting Interpreter: PowerShell
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Hide Artifacts: Hidden Files and Directories
Accesses Microsoft Outlook profiles
Adds Run key to start application
Looks up external IP address via web service
Checks computer location settings
Family: MassLogger
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/a237a8b0d6af75b029817b6aa0efcb81d0caaa84d43ccb77b43c3689ee981ede

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: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)

File information

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

Comments