Analysis
- max time kernel
150s - max time network
142s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
- submitted
02/11/2026, 13:32
General
- Target Company Request.JS.js
- Size 4.8MB
- Sample261102-qs383stybx
- SHA256 2a791d8bb1c588f9fb8c411605afc8c4e939e9aa25663e92968299f175c27443
Malware Config
Extracted
-
remcos
-
7.3.1 Pro
-
Test
-
kingremcos2026.duckdns.org:2404
-
www.kingmethodclassprojectnow.com:2404
-
www.kingmethodclassprojectnowbackup.com:2404
-
www.kingmethodclassprojectnowbackup1.com:2404
-
audio_folder
MicRecords
-
audio_path
ApplicationPath
-
audio_record_time
5
-
connect_delay
0
-
connect_interval
1
-
copy_file
remcos.exe
-
copy_folder
Remcos
-
delete_file
false
-
hide_file
false
-
hide_keylog_file
false
-
install_flag
false
-
keylog_crypt
false
-
keylog_file
logs.dat
-
keylog_flag
false
-
keylog_folder
folder
-
mouse_option
false
-
mutex
Rmc-ZR4RL9
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screenshots
-
screenshot_path
%AppData%
-
screenshot_time
10
-
take_screenshot_option
false
-
take_screenshot_time
5
Signatures
- Family: DonutLoader
DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.
- Family: Remcos
Remcos is a closed-source remote control and surveillance software.
- Suricata alert: REMCOS RAT Malware Inbound C2 Communication 8 IoCs
Network activity triggered a Suricata alert
- Suricata alert: REMCOS RAT Malware Outbound C2 Communication 10 IoCs
Network activity triggered a Suricata alert
- Detects DonutLoader 2 IoCs
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 2 IoCs
- 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 2 IoCs
- Adds Run key to start application 2 TTPs 2 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Executes a VBScript file via the Windows Script Host. 1 TTPs 1 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.
- NTFS ADS 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
- outlook_office_path 1 IoCs
Processes
-
C:\Windows\system32\wscript.exewscript.exe "C:\Users\Admin\AppData\Local\Temp\Company Request.JS.js"1⤵
- 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\Company Request.JS.js:Zone.Identifier"2⤵
- Executes a command shell one-liner
- NTFS ADS
-
-
C:\Users\Admin\Documents\VEFFYDGNYCKHBOLW.exe"C:\Users\Admin\Documents\VEFFYDGNYCKHBOLW.exe" C:\Users\Admin\Documents\WLOBHKCYNGDYFFEV2⤵
- Suricata alert: REMCOS RAT Malware Inbound C2 Communication
- Suricata alert: REMCOS RAT Malware Outbound C2 Communication
- Executes dropped EXE
- Loads dropped DLL
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of SetWindowsHookEx
- outlook_office_path
-
-
C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\Documents\WLOBHKCYNGDYFFEV.vbs"1⤵
- Checks computer location settings
- Executes a VBScript file via the Windows Script Host.
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\Documents\VEFFYDGNYCKHBOLW.exe"C:\Users\Admin\Documents\VEFFYDGNYCKHBOLW.exe" "C:\Users\Admin\Documents\WLOBHKCYNGDYFFEV"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
-
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
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
logs.dat
Login Data For Account.tmp
VEFFYDGNYCKHBOLW.exe
VEFFYDGNYCKHBOLW.mui
WLOBHKCYNGDYFFEV
WLOBHKCYNGDYFFEV.vbs
lua51.dll
memory/916-59-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-58-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-17-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-18-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-23-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-22-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-28-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-27-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-26-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-25-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-24-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-21-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-29-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-31-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-30-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-32-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-36-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-37-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-35-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-34-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-33-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-38-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-39-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-40-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-44-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-43-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-42-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-41-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-60-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-16-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-61-0x0000000002430000-0x0000000003430000-memory.dmp
memory/916-62-0x0000000002430000-0x00000000024D9000-memory.dmp
memory/916-15-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-57-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-64-0x00000000143B0000-0x000000001445F000-memory.dmp
memory/916-56-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-55-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-54-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-53-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-52-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-51-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-50-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-46-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-45-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-49-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-48-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/916-47-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-77-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-76-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-78-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-70-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-79-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-82-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-81-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-67-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-68-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-80-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-69-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-75-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-74-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-73-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-72-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-71-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-84-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/4800-83-0x0000000057FD0000-0x0000000057FE0000-memory.dmp