Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
08/06/2026, 09:21
General
- Target 4d1b8646c493d3fed46745143f84d655331efb35a908297c86efcdc90fe7cecd.exe
- Size 764KB
- Sample260608-lbfn8sbz21
- SHA256 4d1b8646c493d3fed46745143f84d655331efb35a908297c86efcdc90fe7cecd
Malware Config
Extracted
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remcos
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7.2.1 Pro
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RemoteHost
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192.3.45.8:2404
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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
true
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keylog_crypt
false
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keylog_file
logs.dat
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keylog_flag
false
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keylog_folder
remcos
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mouse_option
false
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mutex
Rmc-8DSSSO
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screenshot_crypt
false
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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.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 3 IoCs
- Adds Run key to start application 2 TTPs 4 IoCs
- Contacts third-party web service commonly abused for C2 1 TTPs 5 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
- Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs
- Drops file in Windows directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: MapViewOfSection 2 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\4d1b8646c493d3fed46745143f84d655331efb35a908297c86efcdc90fe7cecd.exe"C:\Users\Admin\AppData\Local\Temp\4d1b8646c493d3fed46745143f84d655331efb35a908297c86efcdc90fe7cecd.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\4d1b8646c493d3fed46745143f84d655331efb35a908297c86efcdc90fe7cecd.exe"C:\Users\Admin\AppData\Local\Temp\4d1b8646c493d3fed46745143f84d655331efb35a908297c86efcdc90fe7cecd.exe"2⤵
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-
C:\Users\Admin\AppData\Local\Temp\4d1b8646c493d3fed46745143f84d655331efb35a908297c86efcdc90fe7cecd.exe"C:\Users\Admin\AppData\Local\Temp\4d1b8646c493d3fed46745143f84d655331efb35a908297c86efcdc90fe7cecd.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\4d1b8646c493d3fed46745143f84d655331efb35a908297c86efcdc90fe7cecd.exe"C:\Users\Admin\AppData\Local\Temp\4d1b8646c493d3fed46745143f84d655331efb35a908297c86efcdc90fe7cecd.exe"3⤵
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C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"4⤵
- Executes dropped EXE
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C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"4⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"5⤵
- Executes dropped EXE
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-
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
remcos.exe
646C991C2A28825F3CC56E0A1D1E3FA9
6DA548C7E5915679F87E910D6581DEF1_E14F3E35014AAF259D1DE08E478C5E98
C02877841121CC45139CB51404116B25_73D8071DD421D477FE74FF80B06542D4
646C991C2A28825F3CC56E0A1D1E3FA9
6DA548C7E5915679F87E910D6581DEF1_E14F3E35014AAF259D1DE08E478C5E98
C02877841121CC45139CB51404116B25_73D8071DD421D477FE74FF80B06542D4
Bookmakeriernes146.txt
Statsborgerret
Galactoma
Hvalpene.ini
Schematiser182.jpg
digekrone.act
dulmede.txt
dundynes.ini
floppets.ini
mediaevalist.ini
pornografiskes.txt
stokkemetoden.ang
unwatchfulness.jpg
Tryksans.txt
Underkue.txt
adoptivpiger.ini
System.dll
memory/1888-28-0x0000000077A99000-0x0000000077A9A000-memory.dmp
memory/1888-44-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/1888-27-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/1888-26-0x00000000016D0000-0x0000000002950000-memory.dmp
memory/1888-61-0x00000000016D0000-0x0000000002950000-memory.dmp
memory/1888-24-0x0000000077A99000-0x0000000077A9A000-memory.dmp
memory/1888-25-0x0000000077A15000-0x0000000077A16000-memory.dmp
memory/1888-23-0x00000000779F8000-0x00000000779F9000-memory.dmp
memory/2088-107-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/4060-22-0x0000000003360000-0x00000000045E0000-memory.dmp
memory/4060-21-0x00000000746F5000-0x00000000746F6000-memory.dmp
memory/4060-20-0x0000000003360000-0x00000000045E0000-memory.dmp