e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3

Change Default File Association

T1042

Processes:

e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exevcn.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	vcn.exe

Modifies visibility of file extensions in Explorer 2 TTPs 2 IoCs

evasion

Hidden Files and Directories

Modify Registry

Processes:

e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exevcn.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	vcn.exe

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

evasion

Hidden Files and Directories

Modify Registry

Processes:

e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exevcn.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	vcn.exe

Executes dropped EXE 1 IoCs

Processes:

vcn.exe

pid process

1644 vcn.exe

pid	process
1644	vcn.exe

Loads dropped DLL 2 IoCs

Processes:

e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe

pid	process
2008	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
2008	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

Processes:

vcn.exe

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

vcn.exe

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

Drops file in System32 directory 6 IoCs

Processes:

vcn.exee454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe

description	ioc	process
File created	\??\c:\windows\SysWOW64\Desktop.sysm	vcn.exe
File created	\??\c:\windows\SysWOW64\CommandPrompt.Sysm	vcn.exe
File created	\??\c:\windows\SysWOW64\maxtrox.txt	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
File created	\??\c:\windows\SysWOW64\Windows 3D.scr	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
File opened for modification	\??\c:\windows\SysWOW64\maxtrox.txt	vcn.exe
File opened for modification	\??\c:\windows\SysWOW64\Windows 3D.scr	vcn.exe

Drops file in Program Files directory 35 IoCs

Processes:

vcn.exe

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

Modifies registry class 36 IoCs

Processes:

e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exevcn.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command\ = "%1"	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\NeverShowExt	vcn.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command\ = "%1"	vcn.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command\ = "%1"	vcn.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\NeverShowExt	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	vcn.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon	vcn.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon	vcn.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon\ = "c:\\windows\\SysWow64\\netsetup.exe"	vcn.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\NeverShowExt	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\ = "Microsoft System Direct"	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon\ = "c:\\windows\\SysWow64\\netsetup.exe"	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	vcn.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\NeverShowExt	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd	vcn.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon\ = "c:\\windows\\SysWow64\\rasphone.exe"	vcn.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm	vcn.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\Shell\Open\Command	vcn.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\NeverShowExt	vcn.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\DefaultIcon	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\ = "Microsoft System Direct"	vcn.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\DefaultIcon\ = "c:\\windows\\SysWow64\\rasphone.exe"	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command\ = "%1"	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\ = "System Mechanic"	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.Msd\Shell\Open\Command	vcn.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.sysm\ = "System Mechanic"	vcn.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exevcn.exe

pid process

2008 e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
1644 vcn.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe

description	pid	process	target process
PID 2008 wrote to memory of 1644	2008	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe	vcn.exe
PID 2008 wrote to memory of 1644	2008	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe	vcn.exe
PID 2008 wrote to memory of 1644	2008	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe	vcn.exe
PID 2008 wrote to memory of 1644	2008	e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe	vcn.exe

C:\Users\Admin\AppData\Local\Temp\e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.exe
"C:\Users\Admin\AppData\Local\Temp\e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3.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:2008

\??\c:\Documents and Settings\Admin\Application Data\Microsoft\vcn.exe
"c:\Documents and Settings\Admin\Application Data\Microsoft\vcn.exe" e454330df4a4f1765173b4249f8128c5ebd8b61a8f6e2bc86f00894b51f114e3
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:1644

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