99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\system32\\IExplorer.exe\""	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\IExplorer.exe"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

Modifies system executable filetype association 2 TTPs 13 IoCs

persistence

Modify Registry

Change Default File Association

T1042

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs

Hidden Files and Directories

Modify Registry

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

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

Hidden Files and Directories

Modify Registry

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

Disables RegEdit via registry modification 2 IoCs

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

Executes dropped EXE 14 IoCs

Processes:

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

pid	process
1624	xk.exe
4200	IExplorer.exe
3360	WINLOGON.EXE
4360	CSRSS.EXE
1596	SERVICES.EXE
3232	xk.exe
4884	IExplorer.exe
4400	WINLOGON.EXE
4248	CSRSS.EXE
4012	SERVICES.EXE
1964	LSASS.EXE
2076	SMSS.EXE
1104	LSASS.EXE
4700	SMSS.EXE

UPX packed file 38 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/3484-132-0x0000000000400000-0x0000000000430000-memory.dmp	upx
C:\Windows\xk.exe	upx
C:\Windows\xk.exe	upx
behavioral2/memory/1624-138-0x0000000000400000-0x0000000000430000-memory.dmp	upx
C:\Windows\SysWOW64\IExplorer.exe	upx
C:\Windows\SysWOW64\IExplorer.exe	upx
behavioral2/memory/4200-144-0x0000000000400000-0x0000000000430000-memory.dmp	upx
C:\Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE	upx
C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE	upx
behavioral2/memory/3360-150-0x0000000000400000-0x0000000000430000-memory.dmp	upx
C:\Users\Admin\AppData\Local\WINDOWS\CSRSS.EXE	upx
C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE	upx
behavioral2/memory/4360-156-0x0000000000400000-0x0000000000430000-memory.dmp	upx
C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE	upx
C:\Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE	upx
behavioral2/memory/1596-162-0x0000000000400000-0x0000000000430000-memory.dmp	upx
C:\Windows\xk.exe	upx
C:\Windows\SysWOW64\IExplorer.exe	upx
behavioral2/memory/3232-168-0x0000000000400000-0x0000000000430000-memory.dmp	upx
behavioral2/memory/4884-172-0x0000000000400000-0x0000000000430000-memory.dmp	upx
C:\Users\Admin\AppData\Local\WINDOWS\WINLOGON.EXE	upx
behavioral2/memory/4400-177-0x0000000000400000-0x0000000000430000-memory.dmp	upx
C:\Users\Admin\AppData\Local\WINDOWS\CSRSS.EXE	upx
behavioral2/memory/4248-182-0x0000000000400000-0x0000000000430000-memory.dmp	upx
C:\Users\Admin\AppData\Local\WINDOWS\SERVICES.EXE	upx
behavioral2/memory/4012-188-0x0000000000400000-0x0000000000430000-memory.dmp	upx
C:\Users\Admin\AppData\Local\WINDOWS\LSASS.EXE	upx
C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE	upx
behavioral2/memory/1964-193-0x0000000000400000-0x0000000000430000-memory.dmp	upx
C:\Users\Admin\AppData\Local\WINDOWS\SMSS.EXE	upx
C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE	upx
behavioral2/memory/2076-199-0x0000000000400000-0x0000000000430000-memory.dmp	upx
behavioral2/memory/3484-200-0x0000000000400000-0x0000000000430000-memory.dmp	upx
C:\Users\Admin\AppData\Local\WINDOWS\LSASS.EXE	upx
behavioral2/memory/1104-206-0x0000000000400000-0x0000000000430000-memory.dmp	upx
C:\Users\Admin\AppData\Local\WINDOWS\SMSS.EXE	upx
behavioral2/memory/4700-210-0x0000000000400000-0x0000000000430000-memory.dmp	upx
behavioral2/memory/3484-211-0x0000000000400000-0x0000000000430000-memory.dmp	upx

Adds Run key to start application 2 TTPs 7 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSMSGS = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\WINLOGON.EXE"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ServiceAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\SERVICES.EXE"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\LogonAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\CSRSS.EXE"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\System Monitoring = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\LSASS.EXE"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Windows\CurrentVersion\Run\	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xk = "C:\\Windows\\xk.exe"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

Drops desktop.ini file(s) 2 IoCs

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	ioc	process
File opened for modification	C:\desktop.ini	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File created	C:\desktop.ini	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	ioc	process
File opened (read-only)	\??\H:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\I:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\K:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\L:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\V:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\W:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\Y:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\B:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\J:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\M:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\N:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\P:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\S:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\Z:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\E:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\O:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\Q:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\R:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\X:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\F:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\G:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\T:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened (read-only)	\??\U:	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

Drops file in System32 directory 6 IoCs

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\shell.exe	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File created	C:\Windows\SysWOW64\shell.exe	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File created	C:\Windows\SysWOW64\Mig2.scr	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File created	C:\Windows\SysWOW64\IExplorer.exe	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened for modification	C:\Windows\SysWOW64\IExplorer.exe	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File opened for modification	C:\Windows\SysWOW64\Mig2.scr	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

Drops file in Windows directory 2 IoCs

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	ioc	process
File opened for modification	C:\Windows\xk.exe	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
File created	C:\Windows\xk.exe	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

Modifies Control Panel 4 IoCs

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\Desktop\SCRNSAVE.EXE = "C:\\Windows\\system32\\Mig~mig.SCR"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\Desktop\ScreenSaverIsSecure = "0"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\Desktop\ScreenSaveTimeOut = "600"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\Desktop\	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

Modifies registry class 15 IoCs

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

pid	process
3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

Suspicious use of SetWindowsHookEx 15 IoCs

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exexk.exeIExplorer.exeWINLOGON.EXECSRSS.EXESERVICES.EXExk.exeIExplorer.exeWINLOGON.EXECSRSS.EXESERVICES.EXELSASS.EXESMSS.EXELSASS.EXESMSS.EXE

pid	process
3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
1624	xk.exe
4200	IExplorer.exe
3360	WINLOGON.EXE
4360	CSRSS.EXE
1596	SERVICES.EXE
3232	xk.exe
4884	IExplorer.exe
4400	WINLOGON.EXE
4248	CSRSS.EXE
4012	SERVICES.EXE
1964	LSASS.EXE
2076	SMSS.EXE
1104	LSASS.EXE
4700	SMSS.EXE

Suspicious use of WriteProcessMemory 42 IoCs

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	pid	process	target process
PID 3484 wrote to memory of 1624	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	xk.exe
PID 3484 wrote to memory of 1624	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	xk.exe
PID 3484 wrote to memory of 1624	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	xk.exe
PID 3484 wrote to memory of 4200	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	IExplorer.exe
PID 3484 wrote to memory of 4200	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	IExplorer.exe
PID 3484 wrote to memory of 4200	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	IExplorer.exe
PID 3484 wrote to memory of 3360	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	WINLOGON.EXE
PID 3484 wrote to memory of 3360	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	WINLOGON.EXE
PID 3484 wrote to memory of 3360	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	WINLOGON.EXE
PID 3484 wrote to memory of 4360	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	CSRSS.EXE
PID 3484 wrote to memory of 4360	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	CSRSS.EXE
PID 3484 wrote to memory of 4360	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	CSRSS.EXE
PID 3484 wrote to memory of 1596	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	SERVICES.EXE
PID 3484 wrote to memory of 1596	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	SERVICES.EXE
PID 3484 wrote to memory of 1596	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	SERVICES.EXE
PID 3484 wrote to memory of 3232	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	xk.exe
PID 3484 wrote to memory of 3232	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	xk.exe
PID 3484 wrote to memory of 3232	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	xk.exe
PID 3484 wrote to memory of 4884	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	IExplorer.exe
PID 3484 wrote to memory of 4884	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	IExplorer.exe
PID 3484 wrote to memory of 4884	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	IExplorer.exe
PID 3484 wrote to memory of 4400	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	WINLOGON.EXE
PID 3484 wrote to memory of 4400	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	WINLOGON.EXE
PID 3484 wrote to memory of 4400	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	WINLOGON.EXE
PID 3484 wrote to memory of 4248	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	CSRSS.EXE
PID 3484 wrote to memory of 4248	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	CSRSS.EXE
PID 3484 wrote to memory of 4248	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	CSRSS.EXE
PID 3484 wrote to memory of 4012	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	SERVICES.EXE
PID 3484 wrote to memory of 4012	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	SERVICES.EXE
PID 3484 wrote to memory of 4012	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	SERVICES.EXE
PID 3484 wrote to memory of 1964	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	LSASS.EXE
PID 3484 wrote to memory of 1964	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	LSASS.EXE
PID 3484 wrote to memory of 1964	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	LSASS.EXE
PID 3484 wrote to memory of 2076	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	SMSS.EXE
PID 3484 wrote to memory of 2076	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	SMSS.EXE
PID 3484 wrote to memory of 2076	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	SMSS.EXE
PID 3484 wrote to memory of 1104	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	LSASS.EXE
PID 3484 wrote to memory of 1104	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	LSASS.EXE
PID 3484 wrote to memory of 1104	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	LSASS.EXE
PID 3484 wrote to memory of 4700	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	SMSS.EXE
PID 3484 wrote to memory of 4700	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	SMSS.EXE
PID 3484 wrote to memory of 4700	3484	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe	SMSS.EXE

System policy modification 1 TTPs 4 IoCs

Modify Registry

Processes:

99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions = "1"	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe

C:\Users\Admin\AppData\Local\Temp\99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe
"C:\Users\Admin\AppData\Local\Temp\99cd30e5e45b85b12ac72c685b0c2937cd9b8edb71d7f359a6829353be77a288.exe"
1⤵
- Modifies WinLogon for persistence
- Modifies system executable filetype association
- Modifies visibility of file extensions in Explorer
- Modifies visiblity of hidden/system files in Explorer
- Disables RegEdit via registry modification
- Adds Run key to start application
- Drops desktop.ini file(s)
- Enumerates connected drives
- 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:3484

C:\Windows\xk.exe
C:\Windows\xk.exe
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:1624

C:\Windows\SysWOW64\IExplorer.exe
C:\Windows\system32\IExplorer.exe
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:4200

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:3360

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:4360

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:1596

C:\Windows\xk.exe
C:\Windows\xk.exe
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:3232

C:\Windows\SysWOW64\IExplorer.exe
C:\Windows\system32\IExplorer.exe
2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:4884

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:4400

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:4248

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:4012

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:1964

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:2076

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:1104

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:4700

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Change Default File Association

T1042

Hidden Files and Directories

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

Hidden Files and Directories