34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\system32\\IExplorer.exe\""	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\IExplorer.exe"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.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-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.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-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe

Detects executables built or packed with MPress PE compressor 18 IoCs

resource	yara_rule
behavioral2/memory/3684-0-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x000700000002341c-8.dat	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x0007000000023420-106.dat	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x0007000000023424-114.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4992-112-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/1760-118-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x0007000000023426-120.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/3160-124-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x0007000000023427-126.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/3996-130-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x0007000000023428-132.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/5064-135-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/5064-137-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x0007000000023429-139.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/3532-143-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x000700000002342a-145.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/1456-150-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/3684-152-0x0000000000400000-0x000000000042E000-memory.dmp	INDICATOR_EXE_Packed_MPress

Disables RegEdit via registry modification 2 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe

Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

Executes dropped EXE 7 IoCs

pid	Process
4992	xk.exe
1760	IExplorer.exe
3160	WINLOGON.EXE
3996	CSRSS.EXE
5064	SERVICES.EXE
3532	LSASS.EXE
1456	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\batfile\shell\open\command	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.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-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xk = "C:\\Windows\\xk.exe"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSMSGS = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\WINLOGON.EXE"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ServiceAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\SERVICES.EXE"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\LogonAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\CSRSS.EXE"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\System Monitoring = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\LSASS.EXE"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\shell.exe	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
File created	C:\Windows\SysWOW64\shell.exe	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
File created	C:\Windows\SysWOW64\Mig2.scr	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
File created	C:\Windows\SysWOW64\IExplorer.exe	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
File opened for modification	C:\Windows\SysWOW64\IExplorer.exe	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
File opened for modification	C:\Windows\SysWOW64\Mig2.scr	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\xk.exe	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
File created	C:\Windows\xk.exe	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe

Modifies Control Panel 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\Desktop\ScreenSaverIsSecure = "0"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\Desktop\ScreenSaveTimeOut = "600"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\Desktop\	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\Desktop\SCRNSAVE.EXE = "C:\\Windows\\system32\\Mig~mig.SCR"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe

Modifies registry class 15 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
4992	xk.exe
1760	IExplorer.exe
3160	WINLOGON.EXE
3996	CSRSS.EXE
5064	SERVICES.EXE
3532	LSASS.EXE
1456	SMSS.EXE

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3684 wrote to memory of 4992	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	81
PID 3684 wrote to memory of 4992	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	81
PID 3684 wrote to memory of 4992	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	81
PID 3684 wrote to memory of 1760	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	82
PID 3684 wrote to memory of 1760	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	82
PID 3684 wrote to memory of 1760	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	82
PID 3684 wrote to memory of 3160	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	83
PID 3684 wrote to memory of 3160	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	83
PID 3684 wrote to memory of 3160	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	83
PID 3684 wrote to memory of 3996	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	84
PID 3684 wrote to memory of 3996	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	84
PID 3684 wrote to memory of 3996	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	84
PID 3684 wrote to memory of 5064	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	85
PID 3684 wrote to memory of 5064	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	85
PID 3684 wrote to memory of 5064	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	85
PID 3684 wrote to memory of 3532	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	86
PID 3684 wrote to memory of 3532	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	86
PID 3684 wrote to memory of 3532	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	86
PID 3684 wrote to memory of 1456	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	87
PID 3684 wrote to memory of 1456	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	87
PID 3684 wrote to memory of 1456	3684	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe	87

System policy modification 1 TTPs 4 IoCs

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions = "1"	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe

C:\Users\Admin\AppData\Local\Temp\34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.exe
"C:\Users\Admin\AppData\Local\Temp\34e8c0ae085fc555f0440edc3c514efa11148f176726e1afc806edf387752211.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
- Modifies Control Panel
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:3684
- C:\Windows\xk.exe
  C:\Windows\xk.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:4992
- C:\Windows\SysWOW64\IExplorer.exe
  C:\Windows\system32\IExplorer.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:1760
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\WINLOGON.EXE"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:3160
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\CSRSS.EXE"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:3996
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SERVICES.EXE"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:5064
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\LSASS.EXE"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:3532
- C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE
  "C:\Users\Admin\Local Settings\Application Data\WINDOWS\SMSS.EXE"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:1456

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery