Analysis
- max time kernel
38s - max time network
35s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
- submitted
12/11/2026, 12:44
General
- Target QTECH20OPPO-6788.js
- Size 2.5MB
- Sample261112-pymylsfe32
- SHA256 72d9baace64a48d8f32cace82283aa580d1044d7ed4ec815e18002eaacf3311d
Malware Config
Extracted
-
Protocol
smtp
-
Host
pro26.emailserver.vn
-
Port
587
-
Username
-
Password
shengyang@2023
Extracted
-
masslogger
-
exfiltration_mode
#SMTPEnabled
-
expire_time_date
00-00-0000
-
host_password
shengyang@2023
-
host_port
587
- host_receiver
- host_sender
-
host_server
pro26.emailserver.vn
-
ssl_slate
True
Signatures
- Family: MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 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 3 IoCs
- Looks up external IP address via web service 1 TTPs 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 TTPs 2 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 2 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 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- NTFS ADS 1 IoCs
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Windows\system32\wscript.exewscript.exe C:\Users\Admin\AppData\Local\Temp\QTECH20OPPO-6788.js1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /c echo. > "C:\Users\Admin\AppData\Local\Temp\QTECH20OPPO-6788.js:Zone.Identifier"2⤵
- Executes a command shell one-liner
- NTFS ADS
-
-
C:\Users\Admin\Documents\PMQKEQPXNMYHYWUA.exe"C:\Users\Admin\Documents\PMQKEQPXNMYHYWUA.exe" C:\Users\Admin\Documents\AUWYHYMNXPQEKQMP2⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- 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
2JavaScript
1Windows Command Shell
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
2Credentials In Files
2Replay Monitor
Loading Replay Monitor...
Downloads
AUWYHYMNXPQEKQMP
PMQKEQPXNMYHYWUA.exe
memory/4652-10-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-11-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-12-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-13-0x0000000002720000-0x0000000002721000-memory.dmp
memory/4652-15-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-16-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-14-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-19-0x0000000002A20000-0x0000000002A21000-memory.dmp
memory/4652-18-0x0000000002A10000-0x0000000002A11000-memory.dmp
memory/4652-17-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-20-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-34-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-35-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-73-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-72-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-71-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-70-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-69-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-68-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-67-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-66-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-65-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-64-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-63-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-62-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-61-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-60-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-59-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-58-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-57-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-56-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-55-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-54-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-53-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-52-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-51-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-50-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-49-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-48-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-47-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-46-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-45-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-44-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-43-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-42-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-41-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-40-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-39-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-38-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-37-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-36-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-31-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-28-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-33-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-32-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-30-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-29-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-27-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-26-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-25-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-24-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-23-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-22-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-21-0x000000007FE40000-0x000000007FE50000-memory.dmp
memory/4652-177-0x0000000029A50000-0x0000000029A6E000-memory.dmp
memory/4652-176-0x0000000029BD0000-0x0000000029BE0000-memory.dmp
memory/4652-178-0x0000000029BD0000-0x0000000029BE0000-memory.dmp
memory/4652-179-0x0000000029BE0000-0x000000002A184000-memory.dmp
memory/4652-180-0x0000000029AF0000-0x0000000029B8C000-memory.dmp
memory/4652-181-0x0000000029BD0000-0x0000000029BE0000-memory.dmp
memory/4652-182-0x000000002AE00000-0x000000002AE50000-memory.dmp
memory/4652-183-0x000000002AFA0000-0x000000002B162000-memory.dmp
memory/4652-186-0x0000000029BD0000-0x0000000029BE0000-memory.dmp
memory/4652-187-0x0000000029BD0000-0x0000000029BE0000-memory.dmp
memory/4652-188-0x000000002B200000-0x000000002B292000-memory.dmp
memory/4652-189-0x000000002B420000-0x000000002B42A000-memory.dmp