Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20260911-en - resource tags
- submitted
09/11/2026, 10:24
General
- Target INV-00475_pdf.vbs
- Size 98KB
- Sample261109-mfkpesef39
- SHA256 45b8b3cf01d1e39999a0f60442ced56f63e54fd5941b124e4218c24c82ab3c22
Malware Config
Extracted
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remcos
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7.3.1 Pro
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RemoteHost
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31.57.216.216:2404
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audio_folder
MicRecords
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audio_path
ApplicationPath
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audio_record_time
5
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connect_delay
0
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connect_interval
1
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copy_file
remcos.exe
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copy_folder
Remcos
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delete_file
false
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hide_file
false
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hide_keylog_file
false
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install_flag
false
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keylog_crypt
false
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keylog_file
logs.dat
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keylog_flag
false
-
keylog_folder
remcos
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mouse_option
false
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mutex
Rmc-TMQ4UY
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screenshot_crypt
false
-
screenshot_flag
false
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screenshot_folder
Screenshots
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screenshot_path
%AppData%
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screenshot_time
10
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take_screenshot_option
false
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take_screenshot_time
5
Signatures
- Family: Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Family: Remcos
Remcos is a closed-source remote control and surveillance software.
- Badlisted process makes network request 3 IoCs
Network request originating from process or tool commonly abused by malware.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Accesses Microsoft Outlook profiles 1 TTPs 2 IoCs
- Contacts third-party web service commonly abused for C2 1 TTPs 3 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
- Executes a VBScript file via the Windows Script Host. 1 TTPs 1 IoCs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 TTPs 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 TTPs 2 IoCs
- 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 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 7 IoCs
- Suspicious behavior: MapViewOfSection 1 TTPs 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 7 IoCs
- outlook_office_path 1 IoCs
Processes
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C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\INV-00475_pdf.vbs"1⤵
- Badlisted process makes network request
- Checks computer location settings
- Executes a VBScript file via the Windows Script Host.
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /q /v:on /c echo ^%Ekspeditionsdeltager48^% | !Halvabes! -2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /S /D /c" echo %Ekspeditionsdeltager48% "3⤵
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\??\c:\windows\syswow64\WindowsPowerShell\v1.0\powershell.exe"c:\windows\syswow64\WindowsPowerShell\v1.0\powershell.exe" -3⤵
- Badlisted process makes network request
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\backgroundtaskhost.exe"C:\Windows\SysWOW64\backgroundtaskhost.exe"4⤵
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C:\Windows\SysWOW64\backgroundtaskhost.exe"C:\Windows\SysWOW64\backgroundtaskhost.exe"4⤵
- Accesses Microsoft Outlook profiles
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
- outlook_office_path
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C:\Windows\SysWOW64\backgroundtaskhost.exe"C:\Windows\SysWOW64\backgroundtaskhost.exe"5⤵
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Network
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
2Visual Basic
1Windows Command Shell
1Replay Monitor
Loading Replay Monitor...
Downloads
Login Data For Account.tmp
__PSScriptPolicyTest_10n3xwxt.hje.ps1
memory/4252-32-0x00000000091B0000-0x000000000C42E000-memory.dmp
memory/4252-33-0x00000000091B0000-0x000000000C42E000-memory.dmp
memory/4252-35-0x00000000051B0000-0x00000000051C0000-memory.dmp
memory/4252-9-0x0000000006040000-0x00000000060A6000-memory.dmp
memory/4252-6-0x00000000057F0000-0x0000000005E18000-memory.dmp
memory/4252-17-0x00000000060B0000-0x0000000006404000-memory.dmp
memory/4252-18-0x00000000065B0000-0x00000000065CE000-memory.dmp
memory/4252-19-0x0000000006660000-0x00000000066AC000-memory.dmp
memory/4252-20-0x00000000069F0000-0x0000000006A34000-memory.dmp
memory/4252-21-0x00000000078D0000-0x0000000007946000-memory.dmp
memory/4252-22-0x0000000007FD0000-0x000000000864A000-memory.dmp
memory/4252-23-0x0000000007950000-0x000000000796A000-memory.dmp
memory/4252-24-0x0000000007B50000-0x0000000007BE6000-memory.dmp
memory/4252-25-0x0000000007AF0000-0x0000000007B12000-memory.dmp
memory/4252-26-0x0000000008C00000-0x00000000091A4000-memory.dmp
memory/4252-27-0x00000000051B0000-0x00000000051C0000-memory.dmp
memory/4252-29-0x00000000051B0000-0x00000000051C0000-memory.dmp
memory/4252-28-0x00000000051B0000-0x00000000051C0000-memory.dmp
memory/4252-31-0x00000000088E0000-0x00000000088E7000-memory.dmp
memory/4252-30-0x00000000051B0000-0x00000000051C0000-memory.dmp
memory/4252-7-0x00000000056E0000-0x0000000005702000-memory.dmp
memory/4252-4-0x00000000051B0000-0x00000000051C0000-memory.dmp
memory/4252-8-0x0000000005FD0000-0x0000000006036000-memory.dmp
memory/4252-36-0x00000000088E0000-0x00000000088E7000-memory.dmp
memory/4252-37-0x00000000091B0000-0x000000000C42E000-memory.dmp
memory/4252-5-0x0000000005050000-0x0000000005086000-memory.dmp
memory/5000-70-0x0000000000E00000-0x0000000002054000-memory.dmp
memory/5000-69-0x0000000000E00000-0x0000000002054000-memory.dmp
memory/5000-58-0x000000001E4C0000-0x000000001E5B7000-memory.dmp
memory/5000-50-0x0000000000E00000-0x0000000002054000-memory.dmp
memory/5000-66-0x0000000000E00000-0x0000000002054000-memory.dmp
memory/5000-67-0x0000000000E00000-0x0000000002054000-memory.dmp
memory/5000-59-0x000000001E4C0000-0x000000001E5B7000-memory.dmp
memory/5000-68-0x0000000000E00000-0x0000000002054000-memory.dmp
memory/5000-71-0x0000000000E00000-0x0000000002054000-memory.dmp
memory/5000-55-0x000000001E4C0000-0x000000001E5B7000-memory.dmp
memory/5000-72-0x0000000000E00000-0x0000000002054000-memory.dmp
memory/5000-73-0x0000000000E00000-0x0000000002054000-memory.dmp
memory/5000-74-0x0000000000E00000-0x0000000002054000-memory.dmp
memory/5000-75-0x0000000000E00000-0x0000000002054000-memory.dmp
memory/5000-76-0x0000000000E00000-0x0000000002054000-memory.dmp
memory/5000-77-0x0000000000E00000-0x0000000002054000-memory.dmp