Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
- submitted
02/11/2026, 04:28
General
- Target RFQ PO-3401121950 .pdf.js
- Size 4.7MB
- Sample261102-e3mhjag17m
- SHA256 1bdcf4e11fa9d6bfe5385fd6a05aad39c74c466d2f2446ab59f179a05a22c3f7
Malware Config
Extracted
-
remcos
-
7.2.5 Pro
-
RemoteHost
-
ja00.duckdns.org:2424
-
jaja00.duckdns.org:2424
-
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
remcos
-
mouse_option
false
-
mutex
yhf-WNJRI0
-
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.
- 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
- Adds Run key to start application 2 TTPs 2 IoCs
- 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
Processes
-
C:\Windows\system32\wscript.exewscript.exe "C:\Users\Admin\AppData\Local\Temp\RFQ PO-3401121950 .pdf.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\RFQ PO-3401121950 .pdf.js:Zone.Identifier"2⤵
- Executes a command shell one-liner
- NTFS ADS
-
-
C:\Users\Admin\Documents\KVBLNRPEZWPGXDSV.exe"C:\Users\Admin\Documents\KVBLNRPEZWPGXDSV.exe" C:\Users\Admin\Documents\VSDXGPWZEPRNLBVK2⤵
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of SetWindowsHookEx
-
-
C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\Documents\VSDXGPWZEPRNLBVK.vbs"1⤵
- Checks computer location settings
- Executes a VBScript file via the Windows Script Host.
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\Documents\KVBLNRPEZWPGXDSV.exe"C:\Users\Admin\Documents\KVBLNRPEZWPGXDSV.exe" "C:\Users\Admin\Documents\VSDXGPWZEPRNLBVK"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
1Replay Monitor
Loading Replay Monitor...
Downloads
logs.dat
KVBLNRPEZWPGXDSV.exe
KVBLNRPEZWPGXDSV.mui
VSDXGPWZEPRNLBVK
VSDXGPWZEPRNLBVK.vbs
lua51.dll
memory/3808-17-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-16-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-18-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-19-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-24-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-23-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-22-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-25-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-26-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-27-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-29-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-28-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-31-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-30-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-32-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-33-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-36-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-35-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-34-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-38-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-37-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-39-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-40-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-43-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-45-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-46-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-44-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-42-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-41-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-49-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-50-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-51-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-48-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-47-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-53-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-52-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-57-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-60-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-59-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-58-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-56-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-55-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-54-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3808-62-0x0000000002400000-0x00000000024A5000-memory.dmp
memory/3808-61-0x0000000002400000-0x0000000003400000-memory.dmp
memory/3808-63-0x0000000014410000-0x00000000144BB000-memory.dmp
memory/3840-67-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-68-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-69-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-70-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-72-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-71-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-77-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-78-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-76-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-75-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-74-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-73-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-82-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-81-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-80-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-79-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-83-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-85-0x0000000057FD0000-0x0000000057FE0000-memory.dmp
memory/3840-84-0x0000000057FD0000-0x0000000057FE0000-memory.dmp