41bdfc53b9cbdb047bf48ae94a89e31eca93cd439c27e52aa261197fe1772934

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\system32\\IExplorer.exe\""	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\IExplorer.exe"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe

Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs

Hidden Files and Directories

T1564.001

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe

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

Hidden Files and Directories

T1564.001

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe

Disables RegEdit via registry modification 2 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe

Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

Executes dropped EXE 7 IoCs

pid	Process
3192	xk.exe
2252	IExplorer.exe
1184	WINLOGON.EXE
4764	CSRSS.EXE
228	SERVICES.EXE
3456	LSASS.EXE
3848	SMSS.EXE

Modifies system executable filetype association 2 TTPs 13 IoCs

persistence

Modify Registry

Change Default File Association

T1546.001

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe

Adds Run key to start application 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\LogonAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\CSRSS.EXE"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\System Monitoring = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\LSASS.EXE"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xk = "C:\\Windows\\xk.exe"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSMSGS = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\WINLOGON.EXE"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ServiceAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\SERVICES.EXE"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\IExplorer.exe	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
File opened for modification	C:\Windows\SysWOW64\Mig2.scr	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
File opened for modification	C:\Windows\SysWOW64\shell.exe	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
File created	C:\Windows\SysWOW64\shell.exe	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
File created	C:\Windows\SysWOW64\Mig2.scr	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
File created	C:\Windows\SysWOW64\IExplorer.exe	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\xk.exe	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
File opened for modification	C:\Windows\xk.exe	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe

System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	IExplorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINLOGON.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CSRSS.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SERVICES.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	LSASS.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SMSS.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe

Modifies Control Panel 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\Desktop\SCRNSAVE.EXE = "C:\\Windows\\system32\\Mig~mig.SCR"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\Desktop\ScreenSaverIsSecure = "0"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\Desktop\ScreenSaveTimeOut = "600"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\Desktop\	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe

Modifies registry class 15 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
3192	xk.exe
2252	IExplorer.exe
1184	WINLOGON.EXE
4764	CSRSS.EXE
228	SERVICES.EXE
3456	LSASS.EXE
3848	SMSS.EXE

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3508 wrote to memory of 3192	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	84
PID 3508 wrote to memory of 3192	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	84
PID 3508 wrote to memory of 3192	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	84
PID 3508 wrote to memory of 2252	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	85
PID 3508 wrote to memory of 2252	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	85
PID 3508 wrote to memory of 2252	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	85
PID 3508 wrote to memory of 1184	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	86
PID 3508 wrote to memory of 1184	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	86
PID 3508 wrote to memory of 1184	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	86
PID 3508 wrote to memory of 4764	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	88
PID 3508 wrote to memory of 4764	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	88
PID 3508 wrote to memory of 4764	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	88
PID 3508 wrote to memory of 228	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	89
PID 3508 wrote to memory of 228	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	89
PID 3508 wrote to memory of 228	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	89
PID 3508 wrote to memory of 3456	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	91
PID 3508 wrote to memory of 3456	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	91
PID 3508 wrote to memory of 3456	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	91
PID 3508 wrote to memory of 3848	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	92
PID 3508 wrote to memory of 3848	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	92
PID 3508 wrote to memory of 3848	3508	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe	92

System policy modification 1 TTPs 4 IoCs

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions = "1"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	ffdd6cbf5a3a6998bd8260f2a093afd0N.exe

C:\Users\Admin\AppData\Local\Temp\ffdd6cbf5a3a6998bd8260f2a093afd0N.exe
"C:\Users\Admin\AppData\Local\Temp\ffdd6cbf5a3a6998bd8260f2a093afd0N.exe"
1⤵
- Modifies WinLogon for persistence
- Modifies visibility of file extensions in Explorer
- Modifies visiblity of hidden/system files in Explorer
- Disables RegEdit via registry modification
- Modifies system executable filetype association
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies Control Panel
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:3508
- C:\Windows\xk.exe
  C:\Windows\xk.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:3192
- C:\Windows\SysWOW64\IExplorer.exe
  C:\Windows\system32\IExplorer.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2252
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:1184
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:4764
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:228
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:3456
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:3848

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery