Analysis
- max time kernel
149s - max time network
126s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
04/11/2026, 18:40
General
- Target Recibo de pago.JS.js
- Size 2.5MB
- Sample261104-xa9fpscw3v
- SHA256 c26311f71197a5b1dbdd7eb574c716f00e7885096a9b275f4b77e8a09a6bbcfe
Malware Config
Extracted
-
masslogger
-
exfiltration_mode
#SMTPEnabled
-
expire_time_date
00-00-0000
-
host_password
VamosNeptum2022$$
-
host_port
587
- host_receiver
- host_sender
-
host_server
mail.neptunfisheries.com
-
ssl_slate
False
Signatures
- Family: MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
- Executes dropped EXE 2 IoCs
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
- Adds Run key to start application 2 TTPs 2 IoCs
- Looks up external IP address via web service 1 TTPs 4 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Executes a VBScript file via the Windows Script Host. 1 TTPs 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 TTPs 4 IoCs
- Command and Scripting Interpreter: JavaScript 1 TTPs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 1 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Modifies registry class 3 IoCs
- NTFS ADS 1 IoCs
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Windows\system32\wscript.exewscript.exe "C:\Users\Admin\AppData\Local\Temp\Recibo de pago.JS.js"1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c echo. > "C:\Users\Admin\AppData\Local\Temp\Recibo de pago.JS.js:Zone.Identifier"2⤵
- Executes a command shell one-liner
- NTFS ADS
-
-
C:\Users\Admin\Documents\HOFBWHLYUIXPHRWB.exe"C:\Users\Admin\Documents\HOFBWHLYUIXPHRWB.exe" C:\Users\Admin\Documents\BWRHPXIUYLHWBFOH2⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\Documents\BWRHPXIUYLHWBFOH.vbs"1⤵
- Executes a VBScript file via the Windows Script Host.
- Modifies registry class
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\Documents\HOFBWHLYUIXPHRWB.exe"C:\Users\Admin\Documents\HOFBWHLYUIXPHRWB.exe" "C:\Users\Admin\Documents\BWRHPXIUYLHWBFOH"2⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Reads the TCP/IP host and domain name from the registry
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
3JavaScript
1Visual Basic
1Windows Command Shell
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
2Credentials In Files
2Replay Monitor
Loading Replay Monitor...
Downloads
BWRHPXIUYLHWBFOH
BWRHPXIUYLHWBFOH.vbs
HOFBWHLYUIXPHRWB.exe
HOFBWHLYUIXPHRWB.mui
memory/2764-11-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-12-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-13-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-18-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-17-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-16-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-20-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-21-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-19-0x0000000000C80000-0x0000000000C81000-memory.dmp
memory/2764-22-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-26-0x0000000000CA0000-0x0000000000CA1000-memory.dmp
memory/2764-29-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-28-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-25-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-24-0x0000000000C90000-0x0000000000C91000-memory.dmp
memory/2764-23-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-27-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-57-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-76-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-75-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-74-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-73-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-72-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-71-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-70-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-69-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-68-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-67-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-66-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-65-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-64-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-63-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-62-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-61-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-60-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-59-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-51-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-50-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-49-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-48-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-47-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-46-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-45-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-44-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-43-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-42-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-41-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-40-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-39-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-38-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-37-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-36-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-35-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-34-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-33-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-30-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-58-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-56-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-55-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-54-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-53-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-52-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-32-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-31-0x000000007FE90000-0x000000007FEA0000-memory.dmp
memory/2764-186-0x0000000074E32000-0x0000000074E33000-memory.dmp
memory/2764-187-0x0000000029BD0000-0x0000000029BEE000-memory.dmp
memory/2764-188-0x0000000029CE0000-0x000000002A29A000-memory.dmp
memory/2764-189-0x0000000074E20000-0x00000000755DC000-memory.dmp
memory/2764-190-0x000000002A2A0000-0x000000002A33C000-memory.dmp
memory/2764-191-0x0000000074E20000-0x00000000755DC000-memory.dmp
memory/2764-192-0x0000000074E20000-0x00000000755DC000-memory.dmp
memory/2764-193-0x0000000074E20000-0x00000000755DC000-memory.dmp
memory/2764-194-0x000000002AFA0000-0x000000002AFF0000-memory.dmp
memory/2764-368-0x000000002B140000-0x000000002B302000-memory.dmp
memory/2764-369-0x000000002B310000-0x000000002B3A2000-memory.dmp
memory/2764-370-0x000000002B430000-0x000000002B43A000-memory.dmp
memory/2764-371-0x0000000074E32000-0x0000000074E33000-memory.dmp
memory/2764-372-0x0000000074E20000-0x00000000755DC000-memory.dmp
memory/2764-374-0x0000000074E20000-0x00000000755DC000-memory.dmp