MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b355c43bd26f9727f4a9461afe6ee78995deceb671ebfddc6f7cf895cc663a02. 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


VIPKeylogger


Vendor detections: 13


Intelligence 13 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b355c43bd26f9727f4a9461afe6ee78995deceb671ebfddc6f7cf895cc663a02
SHA3-384 hash: fbdf9aac3ca801ea00796cf195d9ce78e5fd6b10af065f60aa73252e3a5a096be374b96109fb08083b7bfa03ede7c242
SHA1 hash: db46b8c2d9f354d95a8fae700889e4f1748d858e
MD5 hash: 581b783692a600d8d6223f5000e295d4
humanhash: berlin-zulu-mexico-vermont
File name:Full Appointment Letter.js
Download: download sample
Signature VIPKeylogger
Create hunting rule
File size:211'327 bytes
First seen:2025-09-12 07:44:17 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 6144:Fls+cbxfMCxyiXwoGugAtwxrjXTrk9WSdPJMyd5+nXy:FlVclutLGarjXTrk9WSdPJngC
Threatray 1'066 similar samples on MalwareBazaar
TLSH T1D824D53DEDA4ECC8436E75E0659D3B06109E0FA3EBB54B6CF8C0096B0D69589DF7A508
Magika javascript
Reporter abuse_ch
Tags:js VIPKeylogger

Intelligence

File Origin
# of uploads :
1
# of downloads :
89
Origin country :
SE SE
Vendor Threat Intelligence
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68c3cf71b2005259887a03aa
Tags:
autorun spam
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm obfuscated obfuscated
Link:
https://www.filescan.io/uploads/68c3d011dbc6f5a29c417ef9/reports/a073a045-d792-425a-ac18-37f2f3b9febb/overview
Verdict:
Malicious
Labled as:
TrojanDropper/JS.Agent
Link:
https://www.hybrid-analysis.com/sample/b355c43bd26f9727f4a9461afe6ee78995deceb671ebfddc6f7cf895cc663a02
Verdict:
Malicious
File Type:
js
First seen:
2025-09-11T06:40:00Z UTC
Last seen:
2025-09-11T06:40:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/b355c43bd26f9727f4a9461afe6ee78995deceb671ebfddc6f7cf895cc663a02/results?tab=lookup
Result
Threat name:
Snake Keylogger, VIP Keylogger
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1776233
Signature
.NET source code contains a sample name check
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Antivirus detection for URL or domain
Creates processes via WMI
Drops script or batch files to the startup folder
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sample uses string decryption to hide its real strings
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Drops script at startup location
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: PowerShell Base64 Encoded IEX Cmdlet
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
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)
Uses the Telegram API (likely for C&C communication)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Wscript starts Powershell (via cmd or directly)
Yara detected Snake Keylogger
Yara detected Telegram RAT
Yara detected VIP Keylogger
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1776233 Sample: Full Appointment Letter.js Startdate: 12/09/2025 Architecture: WINDOWS Score: 100 107 reallyfreegeoip.org 2->107 109 api.telegram.org 2->109 111 3 other IPs or domains 2->111 127 Suricata IDS alerts for network traffic 2->127 129 Found malware configuration 2->129 131 Malicious sample detected (through community Yara rule) 2->131 137 15 other signatures 2->137 10 wscript.exe 1 1 2->10         started        14 cmd.exe 2->14         started        16 cmd.exe 1 2->16         started        18 7 other processes 2->18 signatures3 133 Tries to detect the country of the analysis system (by using the IP) 107->133 135 Uses the Telegram API (likely for C&C communication) 109->135 process4 file5 85 C:\Users\user\...\ArtificialPortal.bat, ASCII 10->85 dropped 151 Wscript starts Powershell (via cmd or directly) 10->151 153 Windows Scripting host queries suspicious COM object (likely to drop second stage) 10->153 155 Suspicious execution chain found 10->155 157 Creates processes via WMI 10->157 20 cmd.exe 1 10->20         started        23 cmd.exe 14->23         started        25 conhost.exe 14->25         started        27 cmd.exe 1 16->27         started        29 conhost.exe 16->29         started        31 cmd.exe 1 18->31         started        33 cmd.exe 1 18->33         started        35 cmd.exe 18->35         started        37 11 other processes 18->37 signatures6 process7 signatures8 139 Suspicious powershell command line found 20->139 141 Wscript starts Powershell (via cmd or directly) 20->141 39 cmd.exe 1 20->39         started        41 conhost.exe 20->41         started        43 cmd.exe 23->43         started        46 cmd.exe 1 27->46         started        48 cmd.exe 1 31->48         started        50 cmd.exe 1 33->50         started        52 cmd.exe 35->52         started        54 cmd.exe 37->54         started        56 3 other processes 37->56 process9 signatures10 58 cmd.exe 2 39->58         started        159 Suspicious powershell command line found 43->159 161 Wscript starts Powershell (via cmd or directly) 43->161 61 powershell.exe 43->61         started        64 conhost.exe 43->64         started        66 2 other processes 46->66 68 2 other processes 48->68 70 2 other processes 50->70 72 2 other processes 52->72 74 2 other processes 54->74 76 6 other processes 56->76 process11 file12 143 Suspicious powershell command line found 58->143 145 Wscript starts Powershell (via cmd or directly) 58->145 78 powershell.exe 19 29 58->78         started        83 conhost.exe 58->83         started        87 C:\Users\user\AppData\Roaming\...\b228.bat, ASCII 61->87 dropped 147 Tries to steal Mail credentials (via file / registry access) 61->147 149 Tries to harvest and steal browser information (history, passwords, etc) 61->149 89 C:\Users\user\AppData\Roaming\...\8f3d.bat, ASCII 66->89 dropped 91 C:\Users\user\AppData\Roaming\...\2a3a.bat, ASCII 68->91 dropped 93 C:\Users\user\AppData\Roaming\...\4201.bat, ASCII 70->93 dropped 95 C:\Users\user\AppData\Roaming\...\ff03.bat, ASCII 72->95 dropped 97 C:\Users\user\AppData\Roaming\...\8493.bat, ASCII 74->97 dropped 99 C:\Users\user\AppData\Roaming\...\6481.bat, ASCII 76->99 dropped 101 C:\Users\user\AppData\Roaming\...\570a.bat, ASCII 76->101 dropped 103 C:\Users\user\AppData\Roaming\...\3119.bat, ASCII 76->103 dropped signatures13 process14 dnsIp15 113 cp2.virtualine.org 178.16.54.253, 49739, 49741, 49742 DUSNET-ASDE Germany 78->113 115 checkip.dyndns.com 132.226.8.169, 49715, 49721, 49723 UTMEMUS United States 78->115 117 2 other IPs or domains 78->117 105 C:\Users\user\AppData\Roaming\...\ab2e.bat, ASCII 78->105 dropped 119 Drops script or batch files to the startup folder 78->119 121 Tries to steal Mail credentials (via file / registry access) 78->121 123 Found suspicious powershell code related to unpacking or dynamic code loading 78->123 125 Loading BitLocker PowerShell Module 78->125 file16 signatures17
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/b355c43bd26f9727f4a9461afe6ee78995deceb671ebfddc6f7cf895cc663a02
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b355c43bd26f9727f4a9461afe6ee78995deceb671ebfddc6f7cf895cc663a02/
Threat name:
Script-BAT.Packed.Generic
Create hunting rule
Status:
Suspicious
First seen:
2025-09-11 10:08:12 UTC
File Type:
Text
AV detection:
9 of 23 (39.13%)
Threat level:
  1/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wnk4io6sn6lsp5fjiynp43xhrgk55tvwohv73xdppt4jltdghiba._file
Verdict:
malicious
Label(s):
vipkeylogger
Create hunting rule
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VIPKeylogger
error
VIPKeylogger
+ 1'056 additional samples on MalwareBazaar
Result
Malware family:
vipkeylogger
Create hunting rule
Score:
  10/10
Tags:
family:vipkeylogger collection discovery execution keylogger stealer
Link:
https://tria.ge/reports/250912-jmq81atzdy/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Browser Information Discovery
Command and Scripting Interpreter: JavaScript
System Location Discovery: System Language Discovery
Accesses Microsoft Outlook profiles
Command and Scripting Interpreter: PowerShell
Looks up external IP address via web service
Drops startup file
Badlisted process makes network request
Process spawned unexpected child process
VIPKeylogger
Vipkeylogger family
Malware family:
VIPKeylogger
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b355c43bd26f/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/b355c43bd26f9727f4a9461afe6ee78995deceb671ebfddc6f7cf895cc663a02

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:SUSP_PS1_JAB_Pattern_Jun22_1
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects suspicious UTF16 and Base64 encoded PowerShell code that starts with a $ sign and a single char variable
Reference:Internal Research
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