Analysis
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max time kernel
150s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
13-12-2024 10:23
Behavioral task
behavioral1
Sample
RMX.exe
Resource
win7-20240729-en
General
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Target
RMX.exe
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Size
469KB
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MD5
87d7fffd5ec9e7bc817d31ce77dee415
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SHA1
6cc44ccc0438c65cdef248cc6d76fc0d05e79222
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SHA256
47ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628
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SHA512
1d2c6ec8676cb1cfbe37f808440287ea6a658d3f21829b5001c3c08a663722eb0537cc681a6faa7d39dc16a101fa2bbf55989a64a7c16143f11aa96033b886a5
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SSDEEP
12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSAn9:uiLJbpI7I2WhQqZ7A9
Malware Config
Extracted
remcos
RMX
154.216.18.132:6868
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audio_folder
MicRecords
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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
true
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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-8G0TND
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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
Signatures
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Remcos family
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description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" reg.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" reg.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" reg.exe -
Adds policy Run key to start application 2 TTPs 6 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" iexplore.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run RMX.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" RMX.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run remcos.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" remcos.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run iexplore.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation RMX.exe Key value queried \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation WScript.exe -
Executes dropped EXE 1 IoCs
pid Process 912 remcos.exe -
Adds Run key to start application 2 TTPs 6 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" iexplore.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" RMX.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" RMX.exe Set value (str) \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" remcos.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" remcos.exe -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 912 set thread context of 4736 912 remcos.exe 92 PID 4736 set thread context of 3596 4736 iexplore.exe 96 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 11 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language iexplore.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language WScript.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language remcos.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language RMX.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000_Classes\Local Settings RMX.exe -
Modifies registry key 1 TTPs 3 IoCs
pid Process 4612 reg.exe 3592 reg.exe 2736 reg.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 912 remcos.exe 912 remcos.exe -
Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 912 remcos.exe 4736 iexplore.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4736 iexplore.exe -
Suspicious use of WriteProcessMemory 35 IoCs
description pid Process procid_target PID 4812 wrote to memory of 2100 4812 RMX.exe 84 PID 4812 wrote to memory of 2100 4812 RMX.exe 84 PID 4812 wrote to memory of 2100 4812 RMX.exe 84 PID 2100 wrote to memory of 4612 2100 cmd.exe 86 PID 2100 wrote to memory of 4612 2100 cmd.exe 86 PID 2100 wrote to memory of 4612 2100 cmd.exe 86 PID 4812 wrote to memory of 3128 4812 RMX.exe 87 PID 4812 wrote to memory of 3128 4812 RMX.exe 87 PID 4812 wrote to memory of 3128 4812 RMX.exe 87 PID 3128 wrote to memory of 3612 3128 WScript.exe 88 PID 3128 wrote to memory of 3612 3128 WScript.exe 88 PID 3128 wrote to memory of 3612 3128 WScript.exe 88 PID 3612 wrote to memory of 912 3612 cmd.exe 90 PID 3612 wrote to memory of 912 3612 cmd.exe 90 PID 3612 wrote to memory of 912 3612 cmd.exe 90 PID 912 wrote to memory of 2512 912 remcos.exe 91 PID 912 wrote to memory of 2512 912 remcos.exe 91 PID 912 wrote to memory of 2512 912 remcos.exe 91 PID 912 wrote to memory of 4736 912 remcos.exe 92 PID 912 wrote to memory of 4736 912 remcos.exe 92 PID 912 wrote to memory of 4736 912 remcos.exe 92 PID 912 wrote to memory of 4736 912 remcos.exe 92 PID 4736 wrote to memory of 4792 4736 iexplore.exe 94 PID 4736 wrote to memory of 4792 4736 iexplore.exe 94 PID 4736 wrote to memory of 4792 4736 iexplore.exe 94 PID 4736 wrote to memory of 3596 4736 iexplore.exe 96 PID 4736 wrote to memory of 3596 4736 iexplore.exe 96 PID 4736 wrote to memory of 3596 4736 iexplore.exe 96 PID 4736 wrote to memory of 3596 4736 iexplore.exe 96 PID 2512 wrote to memory of 2736 2512 cmd.exe 97 PID 2512 wrote to memory of 2736 2512 cmd.exe 97 PID 2512 wrote to memory of 2736 2512 cmd.exe 97 PID 4792 wrote to memory of 3592 4792 cmd.exe 98 PID 4792 wrote to memory of 3592 4792 cmd.exe 98 PID 4792 wrote to memory of 3592 4792 cmd.exe 98
Processes
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C:\Users\Admin\AppData\Local\Temp\RMX.exe"C:\Users\Admin\AppData\Local\Temp\RMX.exe"1⤵
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4812 -
C:\Windows\SysWOW64\cmd.exe/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f2⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2100 -
C:\Windows\SysWOW64\reg.exeC:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f3⤵
- UAC bypass
- System Location Discovery: System Language Discovery
- Modifies registry key
PID:4612
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"2⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3128 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\remcos.exe"3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3612 -
C:\ProgramData\Remcos\remcos.exeC:\ProgramData\Remcos\remcos.exe4⤵
- Adds policy Run key to start application
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:912 -
C:\Windows\SysWOW64\cmd.exe/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f5⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2512 -
C:\Windows\SysWOW64\reg.exeC:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f6⤵
- UAC bypass
- System Location Discovery: System Language Discovery
- Modifies registry key
PID:2736
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\??\c:\program files (x86)\internet explorer\iexplore.exe"c:\program files (x86)\internet explorer\iexplore.exe"5⤵
- Adds policy Run key to start application
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4736 -
C:\Windows\SysWOW64\cmd.exe/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f6⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4792 -
C:\Windows\SysWOW64\reg.exeC:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f7⤵
- UAC bypass
- System Location Discovery: System Language Discovery
- Modifies registry key
PID:3592
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C:\Windows\SysWOW64\svchost.exesvchost.exe6⤵PID:3596
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Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Impair Defenses
1Disable or Modify Tools
1Modify Registry
4Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
144B
MD50b644ef29e9e49669a024b05aa4f360a
SHA1757b52701160d26c89552c11ef80bfc67291d1fb
SHA256efb2f2089b6916ef12fef3f3cdaf63b6710cab2069ba07bcc233c3e66a59bf27
SHA51222c3c3a53bb744528ba27ac4bb96804833d3e537ca9f962f45bd279e0861933dd39b86b9b9fc5906852f8bd984b2754411e3116de9a3547d1479b20ad6b0fa04
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Filesize
469KB
MD587d7fffd5ec9e7bc817d31ce77dee415
SHA16cc44ccc0438c65cdef248cc6d76fc0d05e79222
SHA25647ae8e5d41bbd1eb506a303584b124c3c8a1caeac4564252fa78856190f0f628
SHA5121d2c6ec8676cb1cfbe37f808440287ea6a658d3f21829b5001c3c08a663722eb0537cc681a6faa7d39dc16a101fa2bbf55989a64a7c16143f11aa96033b886a5
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Filesize
386B
MD51ec6289c6fd4c2ded6b2836ed28cbeb5
SHA1c4e08195e6c640eb8860acc03fda1d649b4fe070
SHA2566efdc40f9eb217f879607614e928b65bff759e424f3efb31faceb2a043c32dc2
SHA51220bc46f4dee22f75f15c402c7c2eaee60fff7dd92548050585571dcbefd59485cc249c06bc3f1aac7a138e5ae67c0c3918b46ffa24c8b0f1b092e2f6b6e21288