a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd

Change Default File Association

T1042

Processes:

a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exewvcv.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	wvcv.exe

Modifies visibility of file extensions in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

Modify Registry

Processes:

a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exewvcv.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	wvcv.exe

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

evasion

Hidden Files and Directories

Modify Registry

Processes:

wvcv.exea768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	wvcv.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe

Executes dropped EXE 1 IoCs

Processes:

wvcv.exe

pid process

1776 wvcv.exe

pid	process
1776	wvcv.exe

Loads dropped DLL 2 IoCs

Processes:

a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe

pid	process
1204	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
1204	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

wvcv.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	wvcv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\VisualStyle = "c:\\windows\\system32\\Desktop.sysm"	wvcv.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:

wvcv.exe

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

Drops file in System32 directory 6 IoCs

Processes:

a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exewvcv.exe

description	ioc	process
File created	\??\c:\windows\SysWOW64\maxtrox.txt	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
File created	\??\c:\windows\SysWOW64\Windows 3D.scr	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
File opened for modification	\??\c:\windows\SysWOW64\maxtrox.txt	wvcv.exe
File opened for modification	\??\c:\windows\SysWOW64\Windows 3D.scr	wvcv.exe
File created	\??\c:\windows\SysWOW64\Desktop.sysm	wvcv.exe
File created	\??\c:\windows\SysWOW64\CommandPrompt.Sysm	wvcv.exe

Drops file in Program Files directory 34 IoCs

Processes:

wvcv.exe

description	ioc	process
File opened for modification	\??\c:\Program Files\Windows Journal\PDIALOG.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Mail\wab.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmprph.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Sidebar\sidebar.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\plugin-container.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Internet Explorer\iexplore.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\crashreporter.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpconfig.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\7-Zip\7zG.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Defender\MSASCui.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\7-Zip\7z.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Internet Explorer\iediagcmd.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\plugin-hang-ui.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\7-Zip\Uninstall.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\default-browser-agent.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\maintenanceservice.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\minidump-analyzer.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\pingsender.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpshare.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Internet Explorer\ieinstal.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\firefox.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\updater.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Defender\MpCmdRun.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpenc.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\7-Zip\7zFM.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Mail\wabmig.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\WMPDMC.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpnetwk.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmpnscfg.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\WMPSideShowGadget.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Internet Explorer\ielowutil.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmlaunch.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Windows Media Player\wmplayer.exe	wvcv.exe
File opened for modification	\??\c:\Program Files\Mozilla Firefox\maintenanceservice_installer.exe	wvcv.exe

Modifies registry class 36 IoCs

Processes:

a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exewvcv.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\NeverShowExt	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\NeverShowExt	wvcv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\NeverShowExt	wvcv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command	wvcv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command\ = "%1"	wvcv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon\ = "c:\\windows\\SysWow64\\rasphone.exe"	wvcv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\ = "System Mechanic"	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\ = "Microsoft System Direct"	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command\ = "%1"	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command	wvcv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon\ = "c:\\windows\\SysWow64\\rasphone.exe"	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command\ = "%1"	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\ = "Microsoft System Direct"	wvcv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon	wvcv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon	wvcv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\ = "System Mechanic"	wvcv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\NeverShowExt	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	wvcv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon\ = "c:\\windows\\SysWow64\\netsetup.exe"	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command\ = "%1"	wvcv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	wvcv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd	wvcv.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm	wvcv.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon\ = "c:\\windows\\SysWow64\\netsetup.exe"	wvcv.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exewvcv.exe

pid process

1204 a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
1776 wvcv.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe

description	pid	process	target process
PID 1204 wrote to memory of 1776	1204	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe	wvcv.exe
PID 1204 wrote to memory of 1776	1204	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe	wvcv.exe
PID 1204 wrote to memory of 1776	1204	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe	wvcv.exe
PID 1204 wrote to memory of 1776	1204	a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe	wvcv.exe

C:\Users\Admin\AppData\Local\Temp\a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe
"C:\Users\Admin\AppData\Local\Temp\a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd.exe"
1⤵
- Modifies system executable filetype association
- Modifies visibility of file extensions in Explorer
- Modifies visiblity of hidden/system files in Explorer
- Loads dropped DLL
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1204

\??\c:\Documents and Settings\Admin\Application Data\Microsoft\wvcv.exe
"c:\Documents and Settings\Admin\Application Data\Microsoft\wvcv.exe" a768daccb7c385a94f0274b625ef5c4d24729efc797f5ee0239f55aa49f4d1bd
2⤵
- Modifies system executable filetype association
- Modifies visibility of file extensions in Explorer
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Enumerates connected drives
- Drops file in System32 directory
- Drops file in Program Files directory
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:1776

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Change Default File Association

T1042

Hidden Files and Directories

2

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

4

Hidden Files and Directories

2

Credential Access

Discovery

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery