819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\system32\\IExplorer.exe\""	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\IExplorer.exe"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs

Hidden Files and Directories

T1564.001

Modify Registry

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs

Hidden Files and Directories

T1564.001

Modify Registry

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

Detects executables built or packed with MPress PE compressor 18 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2700-0-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
C:\Users\Admin\AppData\Local\winlogon.exe	INDICATOR_EXE_Packed_MPress
C:\Windows\xk.exe	INDICATOR_EXE_Packed_MPress
behavioral2/memory/1796-112-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
C:\Windows\SysWOW64\IExplorer.exe	INDICATOR_EXE_Packed_MPress
behavioral2/memory/3716-117-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
C:\Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE	INDICATOR_EXE_Packed_MPress
behavioral2/memory/1396-127-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4036-131-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
C:\Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE	INDICATOR_EXE_Packed_MPress
behavioral2/memory/2232-136-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/2232-138-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
C:\Users\Admin\AppData\Local\WINDOWS\LSASS.EXE	INDICATOR_EXE_Packed_MPress
behavioral2/memory/2564-145-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
C:\Users\Admin\AppData\Local\WINDOWS\SMSS.EXE	INDICATOR_EXE_Packed_MPress
behavioral2/memory/5096-152-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/2700-154-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress

Disables RegEdit via registry modification 2 IoCs

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490
Executes dropped EXE 7 IoCs

Processes:

xk.exeIExplorer.exeWINLOGON.EXECSRSS.EXESERVICES.EXELSASS.EXESMSS.EXE

pid process

1796 xk.exe
3716 IExplorer.exe
1396 WINLOGON.EXE
4036 CSRSS.EXE
2232 SERVICES.EXE
2564 LSASS.EXE
5096 SMSS.EXE

pid	process
1796	xk.exe
3716	IExplorer.exe
1396	WINLOGON.EXE
4036	CSRSS.EXE
2232	SERVICES.EXE
2564	LSASS.EXE
5096	SMSS.EXE

Modifies system executable filetype association 2 TTPs 13 IoCs

persistence

Modify Registry

Change Default File Association

T1546.001

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

Adds Run key to start application 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\LogonAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\CSRSS.EXE"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\System Monitoring = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\LSASS.EXE"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xk = "C:\\Windows\\xk.exe"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSMSGS = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\WINLOGON.EXE"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ServiceAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\SERVICES.EXE"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

Drops file in System32 directory 6 IoCs

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\IExplorer.exe	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
File opened for modification	C:\Windows\SysWOW64\Mig2.scr	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
File opened for modification	C:\Windows\SysWOW64\shell.exe	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
File created	C:\Windows\SysWOW64\shell.exe	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
File created	C:\Windows\SysWOW64\Mig2.scr	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
File created	C:\Windows\SysWOW64\IExplorer.exe	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

Drops file in Windows directory 2 IoCs

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

description	ioc	process
File opened for modification	C:\Windows\xk.exe	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
File created	C:\Windows\xk.exe	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

Modifies Control Panel 4 IoCs

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\Desktop\ScreenSaveTimeOut = "600"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\Desktop\	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\Desktop\SCRNSAVE.EXE = "C:\\Windows\\system32\\Mig~mig.SCR"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\Desktop\ScreenSaverIsSecure = "0"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

Modifies registry class 15 IoCs

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

pid	process
2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

Suspicious use of SetWindowsHookEx 8 IoCs

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exexk.exeIExplorer.exeWINLOGON.EXECSRSS.EXESERVICES.EXELSASS.EXESMSS.EXE

pid	process
2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
1796	xk.exe
3716	IExplorer.exe
1396	WINLOGON.EXE
4036	CSRSS.EXE
2232	SERVICES.EXE
2564	LSASS.EXE
5096	SMSS.EXE

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

description	pid	process	target process
PID 2700 wrote to memory of 1796	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	xk.exe
PID 2700 wrote to memory of 1796	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	xk.exe
PID 2700 wrote to memory of 1796	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	xk.exe
PID 2700 wrote to memory of 3716	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	IExplorer.exe
PID 2700 wrote to memory of 3716	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	IExplorer.exe
PID 2700 wrote to memory of 3716	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	IExplorer.exe
PID 2700 wrote to memory of 1396	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	WINLOGON.EXE
PID 2700 wrote to memory of 1396	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	WINLOGON.EXE
PID 2700 wrote to memory of 1396	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	WINLOGON.EXE
PID 2700 wrote to memory of 4036	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	CSRSS.EXE
PID 2700 wrote to memory of 4036	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	CSRSS.EXE
PID 2700 wrote to memory of 4036	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	CSRSS.EXE
PID 2700 wrote to memory of 2232	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	SERVICES.EXE
PID 2700 wrote to memory of 2232	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	SERVICES.EXE
PID 2700 wrote to memory of 2232	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	SERVICES.EXE
PID 2700 wrote to memory of 2564	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	LSASS.EXE
PID 2700 wrote to memory of 2564	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	LSASS.EXE
PID 2700 wrote to memory of 2564	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	LSASS.EXE
PID 2700 wrote to memory of 5096	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	SMSS.EXE
PID 2700 wrote to memory of 5096	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	SMSS.EXE
PID 2700 wrote to memory of 5096	2700	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe	SMSS.EXE

System policy modification 1 TTPs 4 IoCs

Modify Registry

Processes:

819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions = "1"	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe

C:\Users\Admin\AppData\Local\Temp\819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe
"C:\Users\Admin\AppData\Local\Temp\819f6d9abf3f55e2d5026e0eac2cdaa2fd8d91ac80d359cdb969bbc515bb54ca.exe"
1⤵
- Modifies WinLogon for persistence
- Modifies visibility of file extensions in Explorer
- Modifies visiblity of hidden/system files in Explorer
- Disables RegEdit via registry modification
- Modifies system executable filetype association
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Modifies Control Panel
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2700

C:\Windows\xk.exe
C:\Windows\xk.exe
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:1796

C:\Windows\SysWOW64\IExplorer.exe
C:\Windows\system32\IExplorer.exe
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:3716

C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE"
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:1396

C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE"
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:4036

C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE"
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:2232

C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE"
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:2564

C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
"C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE"
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:5096

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery