435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1

Processes:

435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\system32\\IExplorer.exe\""	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\IExplorer.exe"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

Modifies system executable filetype association 2 TTPs 13 IoCs

persistence

Modify Registry

Change Default File Association

T1042

Processes:

435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs

Hidden Files and Directories

Modify Registry

Processes:

435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

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

Hidden Files and Directories

Modify Registry

Processes:

435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

Disables RegEdit via registry modification 2 IoCs

Processes:

435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

UPX packed file 1 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1672-58-0x0000000000400000-0x0000000000430000-memory.dmp	upx

Adds Run key to start application 2 TTPs 7 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\xk = "C:\\Windows\\xk.exe"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSMSGS = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\WINLOGON.EXE"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\ServiceAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\SERVICES.EXE"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\LogonAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\CSRSS.EXE"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\System Monitoring = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\LSASS.EXE"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1036 1672 WerFault.exe 435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

pid	pid_target	process	target process
1036	1672	WerFault.exe	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

Modifies Control Panel 4 IoCs

Processes:

435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\Desktop\	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\Desktop\SCRNSAVE.EXE = "C:\\Windows\\system32\\Mig~mig.SCR"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\Desktop\ScreenSaverIsSecure = "0"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\Desktop\ScreenSaveTimeOut = "600"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

Modifies registry class 15 IoCs

Processes:

435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

pid process

1672 435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

pid	process
1672	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

description	pid	process	target process
PID 1672 wrote to memory of 1036	1672	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe	WerFault.exe
PID 1672 wrote to memory of 1036	1672	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe	WerFault.exe
PID 1672 wrote to memory of 1036	1672	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe	WerFault.exe
PID 1672 wrote to memory of 1036	1672	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe	WerFault.exe

System policy modification 1 TTPs 4 IoCs

Modify Registry

Processes:

435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions = "1"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe

C:\Users\Admin\AppData\Local\Temp\435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.exe
"C:\Users\Admin\AppData\Local\Temp\435e3bcdea5d8af7ca10960618821e8a3b6c859e925b1a40f0b2b1c914f6fdd1.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
- Modifies Control Panel
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1672

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1672 -s 388
2⤵
- Program crash
PID:1036

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Change Default File Association

T1042

Hidden Files and Directories

2

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

6

Hidden Files and Directories

2

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Inhibit System Recovery