Analysis
- max time kernel
149s - max time network
148s - platform
windows11-21h2_x64 - resource
win11-20260513-en - resource tags
- submitted
08/06/2026, 10:34
General
- Target 5e8e303f85b17263f85044d1e8dd593477755c753d13664bac9ba8f53241ec26.exe
- Size 1.2MB
- Sample260608-mmbebsct3j
- SHA256 5e8e303f85b17263f85044d1e8dd593477755c753d13664bac9ba8f53241ec26
Malware Config
Extracted
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remcos
-
7.2.1 Pro
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RemoteHost
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104.168.5.25:2404
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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-34N137
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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.
- 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 3 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\5e8e303f85b17263f85044d1e8dd593477755c753d13664bac9ba8f53241ec26.exe"C:\Users\Admin\AppData\Local\Temp\5e8e303f85b17263f85044d1e8dd593477755c753d13664bac9ba8f53241ec26.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\5e8e303f85b17263f85044d1e8dd593477755c753d13664bac9ba8f53241ec26.exe"C:\Users\Admin\AppData\Local\Temp\5e8e303f85b17263f85044d1e8dd593477755c753d13664bac9ba8f53241ec26.exe"2⤵
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-
C:\Users\Admin\AppData\Local\Temp\5e8e303f85b17263f85044d1e8dd593477755c753d13664bac9ba8f53241ec26.exe"C:\Users\Admin\AppData\Local\Temp\5e8e303f85b17263f85044d1e8dd593477755c753d13664bac9ba8f53241ec26.exe"2⤵
- 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\5e8e303f85b17263f85044d1e8dd593477755c753d13664bac9ba8f53241ec26.exe"C:\Users\Admin\AppData\Local\Temp\5e8e303f85b17263f85044d1e8dd593477755c753d13664bac9ba8f53241ec26.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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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
remcos.exe
24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
6DA548C7E5915679F87E910D6581DEF1_E14F3E35014AAF259D1DE08E478C5E98
C02877841121CC45139CB51404116B25_73D8071DD421D477FE74FF80B06542D4
24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
6DA548C7E5915679F87E910D6581DEF1_E14F3E35014AAF259D1DE08E478C5E98
C02877841121CC45139CB51404116B25_73D8071DD421D477FE74FF80B06542D4
System.dll
Ytterbia162.jpg
detonator.txt
fluorideret.txt
kategoriske.kor
marinership.txt
protoplasma.jpg
solisterne.ini
udjagede.ini
Atomvaabenfrit.ini
Konkretiserendes
Rakery.ini
Seborrheic.jpg
memory/2088-115-0x00000000004A0000-0x00000000017B7000-memory.dmp
memory/2088-112-0x00000000004A0000-0x00000000017B7000-memory.dmp
memory/3052-26-0x0000000003300000-0x0000000004074000-memory.dmp
memory/3052-24-0x0000000003300000-0x0000000004074000-memory.dmp
memory/3052-25-0x0000000074145000-0x0000000074146000-memory.dmp
memory/4012-46-0x00000000017C0000-0x0000000002534000-memory.dmp
memory/4012-27-0x0000000077398000-0x0000000077399000-memory.dmp
memory/4012-29-0x00000000773AB000-0x00000000773AC000-memory.dmp
memory/4012-28-0x000000007742B000-0x000000007742C000-memory.dmp
memory/4012-41-0x00000000004A0000-0x00000000017B7000-memory.dmp
memory/4012-47-0x0000000077301000-0x0000000077423000-memory.dmp
memory/4012-60-0x00000000017C0000-0x0000000002534000-memory.dmp