Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240704-en - resource tags
- submitted
09/07/2024, 00:03
General
- Target GUIfpt.exe
- Size 1.6MB
- Sample240709-acf6lswbpp
- SHA256 0cf0dfa4ae3c9d86b14e8f965d3fbb4b133b1978ebf89de2b054ef6a1f7c3d86
Malware Config
Extracted
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remcos
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3.3.2 Pro
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5002
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62.204.41.246:5002
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audio_folder
MicRecords
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audio_path
%AppData%
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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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install_path
%AppData%
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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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keylog_path
%AppData%
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mouse_option
false
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mutex
Remcos-RT3FIS
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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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startup_value
Remcos
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take_screenshot_option
false
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take_screenshot_time
5
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take_screenshot_title
notepad;solitaire;
Signatures
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 5 IoCs
- Loads dropped DLL 23 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- Suspicious behavior: EnumeratesProcesses 7 IoCs
- Suspicious behavior: MapViewOfSection 2 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 25 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\GUIfpt.exe"C:\Users\Admin\AppData\Local\Temp\GUIfpt.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-1A33M.tmp\GUIfpt.tmp"C:\Users\Admin\AppData\Local\Temp\is-1A33M.tmp\GUIfpt.tmp" /SL5="$D0056,814592,0,C:\Users\Admin\AppData\Local\Temp\GUIfpt.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\GUIfpt.exe"C:\Users\Admin\AppData\Local\Temp\GUIfpt.exe" /VERYSILENT3⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-J5Q0G.tmp\GUIfpt.tmp"C:\Users\Admin\AppData\Local\Temp\is-J5Q0G.tmp\GUIfpt.tmp" /SL5="$C005C,814592,0,C:\Users\Admin\AppData\Local\Temp\GUIfpt.exe" /VERYSILENT4⤵
- Checks computer location settings
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\GUIfptw64.exe"C:\Users\Admin\AppData\Roaming\GUIfptw64.exe"5⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1436 -s 11886⤵
- Program crash
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C:\Users\Admin\AppData\Roaming\SpyShelter.exe"C:\Users\Admin\AppData\Roaming\SpyShelter.exe"5⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\ultraSystem_test\SpyShelter.exeC:\Users\Admin\AppData\Roaming\ultraSystem_test\SpyShelter.exe6⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exeC:\Windows\SysWOW64\cmd.exe7⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe8⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 204 -p 1436 -ip 14361⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
6cfe5115
GUIfpt.tmp
_isdecmp.dll
GUIfptw64.exe
SpyShelter.exe
acapnia.zip
flutter_desktop_sleep_plugin.dll
flutter_windows.dll
msvcp140.dll
quadrat.wmv
tray_manager_plugin.dll
url_launcher_windows_plugin.dll
vcruntime140.dll
vcruntime140_1.dll
windows_single_instance_plugin.dll
memory/1144-66-0x0000000000400000-0x00000000004D4000-memory.dmp
memory/1144-17-0x0000000000400000-0x00000000004D4000-memory.dmp
memory/1144-116-0x0000000000400000-0x00000000004D4000-memory.dmp
memory/1436-63-0x0000000005BA0000-0x0000000006144000-memory.dmp
memory/1436-62-0x0000000000CD0000-0x0000000000CF8000-memory.dmp
memory/1436-64-0x00000000056E0000-0x0000000005772000-memory.dmp
memory/1436-65-0x0000000005790000-0x000000000579A000-memory.dmp
memory/1500-163-0x0000000000400000-0x000000000047C000-memory.dmp
memory/1500-161-0x0000000000400000-0x000000000047C000-memory.dmp
memory/1500-160-0x00007FFE8A850000-0x00007FFE8AA45000-memory.dmp
memory/3416-6-0x0000000000400000-0x0000000000710000-memory.dmp
memory/3416-19-0x0000000000400000-0x0000000000710000-memory.dmp
memory/4444-152-0x00007FFE6D110000-0x00007FFE6D282000-memory.dmp
memory/4444-153-0x00007FFE6D110000-0x00007FFE6D282000-memory.dmp
memory/4460-113-0x0000000000400000-0x0000000000710000-memory.dmp
memory/4460-25-0x0000000000400000-0x0000000000710000-memory.dmp
memory/4460-67-0x0000000000400000-0x0000000000710000-memory.dmp
memory/4604-0-0x0000000000400000-0x00000000004D4000-memory.dmp
memory/4604-21-0x0000000000400000-0x00000000004D4000-memory.dmp
memory/4604-2-0x0000000000401000-0x00000000004B7000-memory.dmp
memory/4688-112-0x00007FFE6D110000-0x00007FFE6D282000-memory.dmp
memory/4732-156-0x00007FFE8A850000-0x00007FFE8AA45000-memory.dmp
memory/4732-158-0x0000000075640000-0x00000000757BB000-memory.dmp