Analysis
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max time kernel
148s -
max time network
138s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
12-08-2024 20:51
Behavioral task
behavioral1
Sample
remcos_a.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
remcos_a.exe
Resource
win10v2004-20240802-en
General
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Target
remcos_a.exe
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Size
483KB
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MD5
3f36f84b4e51cafed0c967c2cc116f8f
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SHA1
49df4cd659e4e38d6a841fed8acd6a00d9a98b23
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SHA256
b5d4fa666ad01922b1bca3c725a33ed3a269dcb26ea51f59a4cda26a37ccbd9c
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SHA512
1b7cc5b652c95664d10084f6bb2727e9f7366c74474b39433a0c14e213d4ff4ce25a2aea1833b987edaa3d2de7a534cda56b21a330ff4aca95a2fa93fcd46877
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SSDEEP
6144:wTz+c6KHYBhDc1RGJdv//NkUn+N5Bkf/0TELRvIZPjbsAOZZBAXccrlT4:wTlrYw1RUh3NFn+N5WfIQIjbs/ZB+T4
Malware Config
Extracted
remcos
RemoteHost
k-peterson.gl.at.ply.gg:64076
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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
Windows.exe
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copy_folder
Windows
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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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install_path
%WinDir%\System32
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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-0E62CJ
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screenshot_crypt
false
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screenshot_flag
true
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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
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Processes:
reg.exereg.exereg.exedescription 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 -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
remcos_a.exedescription ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation remcos_a.exe -
Executes dropped EXE 1 IoCs
Processes:
Windows.exepid Process 4484 Windows.exe -
Adds Run key to start application 2 TTPs 6 IoCs
Processes:
remcos_a.exeWindows.exeiexplore.exedescription ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-0E62CJ = "\"C:\\Windows\\SysWOW64\\Windows\\Windows.exe\"" remcos_a.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-0E62CJ = "\"C:\\Windows\\SysWOW64\\Windows\\Windows.exe\"" remcos_a.exe Set value (str) \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-0E62CJ = "\"C:\\Windows\\SysWOW64\\Windows\\Windows.exe\"" Windows.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-0E62CJ = "\"C:\\Windows\\SysWOW64\\Windows\\Windows.exe\"" Windows.exe Set value (str) \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-0E62CJ = "\"C:\\Windows\\SysWOW64\\Windows\\Windows.exe\"" iexplore.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-0E62CJ = "\"C:\\Windows\\SysWOW64\\Windows\\Windows.exe\"" iexplore.exe -
Drops file in System32 directory 3 IoCs
Processes:
remcos_a.exedescription ioc Process File created C:\Windows\SysWOW64\Windows\Windows.exe remcos_a.exe File opened for modification C:\Windows\SysWOW64\Windows\Windows.exe remcos_a.exe File opened for modification C:\Windows\SysWOW64\Windows remcos_a.exe -
Suspicious use of SetThreadContext 2 IoCs
Processes:
Windows.exeiexplore.exedescription pid Process procid_target PID 4484 set thread context of 4716 4484 Windows.exe 91 PID 4716 set thread context of 3660 4716 iexplore.exe 95 -
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 9 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
Processes:
remcos_a.execmd.exeWindows.exeiexplore.execmd.exereg.exereg.execmd.exereg.exedescription ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language remcos_a.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language Windows.exe 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 reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language cmd.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language reg.exe -
Modifies registry class 1 IoCs
Processes:
remcos_a.exedescription ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ remcos_a.exe -
Modifies registry key 1 TTPs 3 IoCs
Processes:
reg.exereg.exereg.exepid Process 3404 reg.exe 800 reg.exe 2376 reg.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
Windows.exepid Process 4484 Windows.exe 4484 Windows.exe -
Suspicious behavior: MapViewOfSection 2 IoCs
Processes:
Windows.exeiexplore.exepid Process 4484 Windows.exe 4716 iexplore.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
iexplore.exepid Process 4716 iexplore.exe -
Suspicious use of WriteProcessMemory 29 IoCs
Processes:
remcos_a.execmd.exeWindows.exeiexplore.execmd.execmd.exedescription pid Process procid_target PID 1948 wrote to memory of 952 1948 remcos_a.exe 84 PID 1948 wrote to memory of 952 1948 remcos_a.exe 84 PID 1948 wrote to memory of 952 1948 remcos_a.exe 84 PID 952 wrote to memory of 800 952 cmd.exe 86 PID 952 wrote to memory of 800 952 cmd.exe 86 PID 952 wrote to memory of 800 952 cmd.exe 86 PID 1948 wrote to memory of 4484 1948 remcos_a.exe 89 PID 1948 wrote to memory of 4484 1948 remcos_a.exe 89 PID 1948 wrote to memory of 4484 1948 remcos_a.exe 89 PID 4484 wrote to memory of 448 4484 Windows.exe 90 PID 4484 wrote to memory of 448 4484 Windows.exe 90 PID 4484 wrote to memory of 448 4484 Windows.exe 90 PID 4484 wrote to memory of 4716 4484 Windows.exe 91 PID 4484 wrote to memory of 4716 4484 Windows.exe 91 PID 4484 wrote to memory of 4716 4484 Windows.exe 91 PID 4484 wrote to memory of 4716 4484 Windows.exe 91 PID 4716 wrote to memory of 2144 4716 iexplore.exe 93 PID 4716 wrote to memory of 2144 4716 iexplore.exe 93 PID 4716 wrote to memory of 2144 4716 iexplore.exe 93 PID 4716 wrote to memory of 3660 4716 iexplore.exe 95 PID 4716 wrote to memory of 3660 4716 iexplore.exe 95 PID 4716 wrote to memory of 3660 4716 iexplore.exe 95 PID 4716 wrote to memory of 3660 4716 iexplore.exe 95 PID 448 wrote to memory of 3404 448 cmd.exe 96 PID 448 wrote to memory of 3404 448 cmd.exe 96 PID 448 wrote to memory of 3404 448 cmd.exe 96 PID 2144 wrote to memory of 2376 2144 cmd.exe 97 PID 2144 wrote to memory of 2376 2144 cmd.exe 97 PID 2144 wrote to memory of 2376 2144 cmd.exe 97
Processes
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C:\Users\Admin\AppData\Local\Temp\remcos_a.exe"C:\Users\Admin\AppData\Local\Temp\remcos_a.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1948 -
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:952 -
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:800
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C:\Windows\SysWOW64\Windows\Windows.exe"C:\Windows\SysWOW64\Windows\Windows.exe"2⤵
- 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:4484 -
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 /f3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:448 -
C:\Windows\SysWOW64\reg.exeC:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f4⤵
- UAC bypass
- System Location Discovery: System Language Discovery
- Modifies registry key
PID:3404
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\??\c:\program files (x86)\internet explorer\iexplore.exe"c:\program files (x86)\internet explorer\iexplore.exe"3⤵
- 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:4716 -
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 /f4⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2144 -
C:\Windows\SysWOW64\reg.exeC:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f5⤵
- UAC bypass
- System Location Discovery: System Language Discovery
- Modifies registry key
PID:2376
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C:\Windows\SysWOW64\svchost.exesvchost.exe4⤵PID:3660
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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
1Registry Run Keys / Startup Folder
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Impair Defenses
1Disable or Modify Tools
1Modify Registry
3Replay Monitor
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Downloads
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Filesize
144B
MD5754a3ad70a2d0aadeff6dba25b56c7e1
SHA17882a2c0c35bc47ea940d26664574c140410c0ce
SHA2562e04a10ab4e5e17f5e5316f8ab156443067060c6179d4bb4094927f0004dda18
SHA5126f7a7ddfe92353b6b9e48dc8a09da459b6304fd4b27f6a48463e2bf4a093bae191f78019e693f3d9df6fb3e16cabede5b148130cd000a161212c65192010040b
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Filesize
483KB
MD53f36f84b4e51cafed0c967c2cc116f8f
SHA149df4cd659e4e38d6a841fed8acd6a00d9a98b23
SHA256b5d4fa666ad01922b1bca3c725a33ed3a269dcb26ea51f59a4cda26a37ccbd9c
SHA5121b7cc5b652c95664d10084f6bb2727e9f7366c74474b39433a0c14e213d4ff4ce25a2aea1833b987edaa3d2de7a534cda56b21a330ff4aca95a2fa93fcd46877