9af65f6d0d95d63012c7e3462047c901fe4c2ed2a28e4f1250fe238552f333da

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\IExplorer.exe"	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\system32\\IExplorer.exe\""	b377b603f77df3e1bf46289a39233ee0N.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-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	b377b603f77df3e1bf46289a39233ee0N.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-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	b377b603f77df3e1bf46289a39233ee0N.exe

Disables RegEdit via registry modification 2 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	b377b603f77df3e1bf46289a39233ee0N.exe

Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

Executes dropped EXE 7 IoCs

pid	Process
1476	xk.exe
532	IExplorer.exe
1100	WINLOGON.EXE
4152	CSRSS.EXE
1932	SERVICES.EXE
3180	LSASS.EXE
4844	SMSS.EXE

Modifies system executable filetype association 2 TTPs 13 IoCs

persistence

Modify Registry

Change Default File Association

T1546.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	b377b603f77df3e1bf46289a39233ee0N.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\USER\S-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ServiceAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\SERVICES.EXE"	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\LogonAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\CSRSS.EXE"	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\System Monitoring = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\LSASS.EXE"	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xk = "C:\\Windows\\xk.exe"	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSMSGS = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\WINLOGON.EXE"	b377b603f77df3e1bf46289a39233ee0N.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\shell.exe	b377b603f77df3e1bf46289a39233ee0N.exe
File created	C:\Windows\SysWOW64\Mig2.scr	b377b603f77df3e1bf46289a39233ee0N.exe
File created	C:\Windows\SysWOW64\IExplorer.exe	b377b603f77df3e1bf46289a39233ee0N.exe
File opened for modification	C:\Windows\SysWOW64\IExplorer.exe	b377b603f77df3e1bf46289a39233ee0N.exe
File opened for modification	C:\Windows\SysWOW64\Mig2.scr	b377b603f77df3e1bf46289a39233ee0N.exe
File opened for modification	C:\Windows\SysWOW64\shell.exe	b377b603f77df3e1bf46289a39233ee0N.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\xk.exe	b377b603f77df3e1bf46289a39233ee0N.exe
File created	C:\Windows\xk.exe	b377b603f77df3e1bf46289a39233ee0N.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	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	b377b603f77df3e1bf46289a39233ee0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	IExplorer.exe

Modifies Control Panel 4 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\Desktop\	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\Desktop\SCRNSAVE.EXE = "C:\\Windows\\system32\\Mig~mig.SCR"	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\Desktop\ScreenSaverIsSecure = "0"	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\Desktop\ScreenSaveTimeOut = "600"	b377b603f77df3e1bf46289a39233ee0N.exe

Modifies registry class 15 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	b377b603f77df3e1bf46289a39233ee0N.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
540	b377b603f77df3e1bf46289a39233ee0N.exe
540	b377b603f77df3e1bf46289a39233ee0N.exe

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
540	b377b603f77df3e1bf46289a39233ee0N.exe
1476	xk.exe
532	IExplorer.exe
1100	WINLOGON.EXE
4152	CSRSS.EXE
1932	SERVICES.EXE
3180	LSASS.EXE
4844	SMSS.EXE

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 540 wrote to memory of 1476	540	b377b603f77df3e1bf46289a39233ee0N.exe	84
PID 540 wrote to memory of 1476	540	b377b603f77df3e1bf46289a39233ee0N.exe	84
PID 540 wrote to memory of 1476	540	b377b603f77df3e1bf46289a39233ee0N.exe	84
PID 540 wrote to memory of 532	540	b377b603f77df3e1bf46289a39233ee0N.exe	85
PID 540 wrote to memory of 532	540	b377b603f77df3e1bf46289a39233ee0N.exe	85
PID 540 wrote to memory of 532	540	b377b603f77df3e1bf46289a39233ee0N.exe	85
PID 540 wrote to memory of 1100	540	b377b603f77df3e1bf46289a39233ee0N.exe	86
PID 540 wrote to memory of 1100	540	b377b603f77df3e1bf46289a39233ee0N.exe	86
PID 540 wrote to memory of 1100	540	b377b603f77df3e1bf46289a39233ee0N.exe	86
PID 540 wrote to memory of 4152	540	b377b603f77df3e1bf46289a39233ee0N.exe	87
PID 540 wrote to memory of 4152	540	b377b603f77df3e1bf46289a39233ee0N.exe	87
PID 540 wrote to memory of 4152	540	b377b603f77df3e1bf46289a39233ee0N.exe	87
PID 540 wrote to memory of 1932	540	b377b603f77df3e1bf46289a39233ee0N.exe	89
PID 540 wrote to memory of 1932	540	b377b603f77df3e1bf46289a39233ee0N.exe	89
PID 540 wrote to memory of 1932	540	b377b603f77df3e1bf46289a39233ee0N.exe	89
PID 540 wrote to memory of 3180	540	b377b603f77df3e1bf46289a39233ee0N.exe	90
PID 540 wrote to memory of 3180	540	b377b603f77df3e1bf46289a39233ee0N.exe	90
PID 540 wrote to memory of 3180	540	b377b603f77df3e1bf46289a39233ee0N.exe	90
PID 540 wrote to memory of 4844	540	b377b603f77df3e1bf46289a39233ee0N.exe	91
PID 540 wrote to memory of 4844	540	b377b603f77df3e1bf46289a39233ee0N.exe	91
PID 540 wrote to memory of 4844	540	b377b603f77df3e1bf46289a39233ee0N.exe	91

System policy modification 1 TTPs 4 IoCs

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	b377b603f77df3e1bf46289a39233ee0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	b377b603f77df3e1bf46289a39233ee0N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions = "1"	b377b603f77df3e1bf46289a39233ee0N.exe

C:\Users\Admin\AppData\Local\Temp\b377b603f77df3e1bf46289a39233ee0N.exe
"C:\Users\Admin\AppData\Local\Temp\b377b603f77df3e1bf46289a39233ee0N.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:540
- C:\Windows\xk.exe
  C:\Windows\xk.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:1476
- 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:532
- 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:1100
- 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:4152
- 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:1932
- 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:3180
- 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:4844

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