remcos | f7284ed876aebbf3407d50fd6acdbd11adb75c31550c3034c1600f4eb4e61043

Modify Registry

T1112

Processes:

Remcos v4.9.3 Pro.exesvhost.exeiexplore.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\ewaewefsefsefdseadwadf-21RLZF = "\"C:\\Windows\\svhost.exe\""	Remcos v4.9.3 Pro.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	svhost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\ewaewefsefsefdseadwadf-21RLZF = "\"C:\\Windows\\svhost.exe\""	svhost.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\ewaewefsefsefdseadwadf-21RLZF = "\"C:\\Windows\\svhost.exe\""	iexplore.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	Remcos v4.9.3 Pro.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Remcos v4.9.3 Pro.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3635043082-2972811465-3176142135-1000\Control Panel\International\Geo\Nation	Remcos v4.9.3 Pro.exe

Executes dropped EXE 1 IoCs

Processes:

svhost.exe

pid process

3720 svhost.exe

pid	process
3720	svhost.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

T1112

Processes:

Remcos v4.9.3 Pro.exesvhost.exeiexplore.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3635043082-2972811465-3176142135-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ewaewefsefsefdseadwadf-21RLZF = "\"C:\\Windows\\svhost.exe\""	Remcos v4.9.3 Pro.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ewaewefsefsefdseadwadf-21RLZF = "\"C:\\Windows\\svhost.exe\""	Remcos v4.9.3 Pro.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3635043082-2972811465-3176142135-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ewaewefsefsefdseadwadf-21RLZF = "\"C:\\Windows\\svhost.exe\""	svhost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ewaewefsefsefdseadwadf-21RLZF = "\"C:\\Windows\\svhost.exe\""	svhost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3635043082-2972811465-3176142135-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ewaewefsefsefdseadwadf-21RLZF = "\"C:\\Windows\\svhost.exe\""	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ewaewefsefsefdseadwadf-21RLZF = "\"C:\\Windows\\svhost.exe\""	iexplore.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

svhost.exeiexplore.exe

description	pid	process	target process
PID 3720 set thread context of 3964	3720	svhost.exe	iexplore.exe
PID 3964 set thread context of 1832	3964	iexplore.exe	svchost.exe

Drops file in Windows directory 2 IoCs

Processes:

Remcos v4.9.3 Pro.exe

description ioc process

File opened for modification C:\Windows\svhost.exe Remcos v4.9.3 Pro.exe
File created C:\Windows\svhost.exe Remcos v4.9.3 Pro.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Modifies registry key 1 TTPs 3 IoCs

Modify Registry
T1112

Processes:

reg.exereg.exereg.exe

pid process

1964 reg.exe
4288 reg.exe
4452 reg.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

svhost.exeiexplore.exe

pid process

3720 svhost.exe
3964 iexplore.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

iexplore.exe

pid process

3964 iexplore.exe

description	ioc	process
File opened for modification	C:\Windows\svhost.exe	Remcos v4.9.3 Pro.exe
File created	C:\Windows\svhost.exe	Remcos v4.9.3 Pro.exe

pid	process
1964	reg.exe
4288	reg.exe
4452	reg.exe

pid	process
3720	svhost.exe
3964	iexplore.exe

pid	process
3964	iexplore.exe

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

Remcos v4.9.3 Pro.execmd.exesvhost.execmd.exeiexplore.execmd.exe

description	pid	process	target process
PID 4824 wrote to memory of 4164	4824	Remcos v4.9.3 Pro.exe	cmd.exe
PID 4824 wrote to memory of 4164	4824	Remcos v4.9.3 Pro.exe	cmd.exe
PID 4824 wrote to memory of 4164	4824	Remcos v4.9.3 Pro.exe	cmd.exe
PID 4164 wrote to memory of 4452	4164	cmd.exe	reg.exe
PID 4164 wrote to memory of 4452	4164	cmd.exe	reg.exe
PID 4164 wrote to memory of 4452	4164	cmd.exe	reg.exe
PID 4824 wrote to memory of 3720	4824	Remcos v4.9.3 Pro.exe	svhost.exe
PID 4824 wrote to memory of 3720	4824	Remcos v4.9.3 Pro.exe	svhost.exe
PID 4824 wrote to memory of 3720	4824	Remcos v4.9.3 Pro.exe	svhost.exe
PID 3720 wrote to memory of 4408	3720	svhost.exe	cmd.exe
PID 3720 wrote to memory of 4408	3720	svhost.exe	cmd.exe
PID 3720 wrote to memory of 4408	3720	svhost.exe	cmd.exe
PID 4408 wrote to memory of 1964	4408	cmd.exe	reg.exe
PID 4408 wrote to memory of 1964	4408	cmd.exe	reg.exe
PID 4408 wrote to memory of 1964	4408	cmd.exe	reg.exe
PID 3720 wrote to memory of 3964	3720	svhost.exe	iexplore.exe
PID 3720 wrote to memory of 3964	3720	svhost.exe	iexplore.exe
PID 3720 wrote to memory of 3964	3720	svhost.exe	iexplore.exe
PID 3720 wrote to memory of 3964	3720	svhost.exe	iexplore.exe
PID 3964 wrote to memory of 4424	3964	iexplore.exe	cmd.exe
PID 3964 wrote to memory of 4424	3964	iexplore.exe	cmd.exe
PID 3964 wrote to memory of 4424	3964	iexplore.exe	cmd.exe
PID 4424 wrote to memory of 4288	4424	cmd.exe	reg.exe
PID 4424 wrote to memory of 4288	4424	cmd.exe	reg.exe
PID 4424 wrote to memory of 4288	4424	cmd.exe	reg.exe
PID 3964 wrote to memory of 1832	3964	iexplore.exe	svchost.exe
PID 3964 wrote to memory of 1832	3964	iexplore.exe	svchost.exe
PID 3964 wrote to memory of 1832	3964	iexplore.exe	svchost.exe
PID 3964 wrote to memory of 1832	3964	iexplore.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\Remcos v4.9.3 Pro.exe
"C:\Users\Admin\AppData\Local\Temp\Remcos v4.9.3 Pro.exe"
1⤵
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4824

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 /f
2⤵
- Suspicious use of WriteProcessMemory
PID:4164

C:\Windows\SysWOW64\reg.exe
C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
3⤵
- UAC bypass
- Modifies registry key
PID:4452

C:\Windows\svhost.exe
"C:\Windows\svhost.exe"
2⤵
- Adds policy Run key to start application
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3720

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 /f
3⤵
- Suspicious use of WriteProcessMemory
PID:4408

C:\Windows\SysWOW64\reg.exe
C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
4⤵
- UAC bypass
- Modifies registry key
PID:1964

\??\c:\program files (x86)\internet explorer\iexplore.exe
"c:\program files (x86)\internet explorer\iexplore.exe"
3⤵
- Adds policy Run key to start application
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3964

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 /f
4⤵
- Suspicious use of WriteProcessMemory
PID:4424

C:\Windows\SysWOW64\reg.exe
C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
5⤵
- UAC bypass
- Modifies registry key
PID:4288

C:\Windows\SysWOW64\svchost.exe
svchost.exe
4⤵
PID:1832

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

T1012

System Information Discovery