Analysis
- max time kernel
149s - max time network
112s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
17/09/2026, 15:03
General
- Target BOQ.js
- Size 1.6MB
- Sample260917-se7epafd84
- SHA256 b89269796fc8c950a68197354583b477825dcd93d17102a044b8b9425ac400de
Malware Config
Extracted
-
remcos
-
7.3.1 Pro
-
RemoteHost
-
43.228.157.194:2404
-
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
remcos
-
mouse_option
false
-
mutex
Rmc-VNSKLH
-
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: Remcos
Remcos is a closed-source remote control and surveillance software.
- Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
- Suspicious use of SetThreadContext 1 IoCs
- Command and Scripting Interpreter: JavaScript 1 TTPs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Modifies registry class 3 IoCs
- Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
- Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Windows\system32\wscript.exewscript.exe C:\Users\Admin\AppData\Local\Temp\BOQ.js1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /tn "PhotoStudioJS" /xml "C:\Users\Admin\AppData\Local\Temp\1272776.xml" /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell.exe -nop -c "IEX(gp 'HKCU:\Software\Classes\.xx785').s"1⤵
- Process spawned unexpected child process
- Command and Scripting Interpreter: PowerShell
- Suspicious use of SetThreadContext
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\sdzfbxid\sdzfbxid.cmdline"2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exeC:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESDB96.tmp" "c:\Users\Admin\AppData\Local\Temp\sdzfbxid\CSC3A11261E358E446DA7229B970CA1C46.TMP"3⤵
-
-
-
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe"2⤵
-
-
C:\Windows\system32\wscript.exewscript.exe1⤵
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
1272776.xml
RESDB96.tmp
sdzfbxid.dll
CSC3A11261E358E446DA7229B970CA1C46.TMP
sdzfbxid.0.cs
sdzfbxid.cmdline
memory/468-33-0x0000000140000000-0x00000001400AF000-memory.dmp
memory/4924-8-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-9-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-11-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-12-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-13-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-14-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-15-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-16-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-17-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-10-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-0-0x00007FFF25C9F000-0x00007FFF25CA0000-memory.dmp
memory/4924-7-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-6-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-32-0x0000019551E90000-0x0000019551E98000-memory.dmp
memory/4924-5-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-4-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp
memory/4924-3-0x0000019551E60000-0x0000019551E82000-memory.dmp
memory/4924-35-0x00007FFF25B10000-0x00007FFF264B4000-memory.dmp