acb398338145f18f11ebb57b8a3480369f0a9838cab3b2b6e5befa2a76d75c20

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\system32\\IExplorer.exe\""	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\IExplorer.exe"	4467692df3f5ba1aff4f51d021a5f5a0N.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-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	4467692df3f5ba1aff4f51d021a5f5a0N.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-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	4467692df3f5ba1aff4f51d021a5f5a0N.exe

Disables RegEdit via registry modification 2 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	4467692df3f5ba1aff4f51d021a5f5a0N.exe

Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

Executes dropped EXE 7 IoCs

pid	Process
1400	xk.exe
2064	IExplorer.exe
4692	WINLOGON.EXE
3276	CSRSS.EXE
2732	SERVICES.EXE
4832	LSASS.EXE
3052	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\exefile\shell\open\command	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	4467692df3f5ba1aff4f51d021a5f5a0N.exe

UPX packed file 17 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3280-0-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/files/0x0007000000023432-8.dat	upx
behavioral2/files/0x0007000000023436-106.dat	upx
behavioral2/memory/1400-112-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/files/0x000700000002343a-114.dat	upx
behavioral2/files/0x000700000002343c-120.dat	upx
behavioral2/memory/2064-119-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/memory/4692-125-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/files/0x000700000002343d-127.dat	upx
behavioral2/memory/3276-131-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/files/0x000700000002343e-133.dat	upx
behavioral2/memory/2732-138-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/files/0x000700000002343f-140.dat	upx
behavioral2/files/0x0007000000023440-148.dat	upx
behavioral2/memory/4832-147-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/memory/3052-152-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/memory/3280-154-0x0000000000400000-0x000000000042F000-memory.dmp	upx

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-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ServiceAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\SERVICES.EXE"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\LogonAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\CSRSS.EXE"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\System Monitoring = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\LSASS.EXE"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xk = "C:\\Windows\\xk.exe"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSMSGS = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\WINLOGON.EXE"	4467692df3f5ba1aff4f51d021a5f5a0N.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Mig2.scr	4467692df3f5ba1aff4f51d021a5f5a0N.exe
File created	C:\Windows\SysWOW64\IExplorer.exe	4467692df3f5ba1aff4f51d021a5f5a0N.exe
File opened for modification	C:\Windows\SysWOW64\IExplorer.exe	4467692df3f5ba1aff4f51d021a5f5a0N.exe
File opened for modification	C:\Windows\SysWOW64\Mig2.scr	4467692df3f5ba1aff4f51d021a5f5a0N.exe
File opened for modification	C:\Windows\SysWOW64\shell.exe	4467692df3f5ba1aff4f51d021a5f5a0N.exe
File created	C:\Windows\SysWOW64\shell.exe	4467692df3f5ba1aff4f51d021a5f5a0N.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\xk.exe	4467692df3f5ba1aff4f51d021a5f5a0N.exe
File created	C:\Windows\xk.exe	4467692df3f5ba1aff4f51d021a5f5a0N.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	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	4467692df3f5ba1aff4f51d021a5f5a0N.exe
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

Modifies Control Panel 4 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\Desktop\	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\Desktop\SCRNSAVE.EXE = "C:\\Windows\\system32\\Mig~mig.SCR"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\Desktop\ScreenSaverIsSecure = "0"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\Desktop\ScreenSaveTimeOut = "600"	4467692df3f5ba1aff4f51d021a5f5a0N.exe

Modifies registry class 15 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	4467692df3f5ba1aff4f51d021a5f5a0N.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe
3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe
1400	xk.exe
2064	IExplorer.exe
4692	WINLOGON.EXE
3276	CSRSS.EXE
2732	SERVICES.EXE
4832	LSASS.EXE
3052	SMSS.EXE

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3280 wrote to memory of 1400	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	86
PID 3280 wrote to memory of 1400	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	86
PID 3280 wrote to memory of 1400	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	86
PID 3280 wrote to memory of 2064	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	87
PID 3280 wrote to memory of 2064	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	87
PID 3280 wrote to memory of 2064	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	87
PID 3280 wrote to memory of 4692	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	88
PID 3280 wrote to memory of 4692	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	88
PID 3280 wrote to memory of 4692	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	88
PID 3280 wrote to memory of 3276	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	89
PID 3280 wrote to memory of 3276	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	89
PID 3280 wrote to memory of 3276	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	89
PID 3280 wrote to memory of 2732	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	90
PID 3280 wrote to memory of 2732	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	90
PID 3280 wrote to memory of 2732	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	90
PID 3280 wrote to memory of 4832	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	92
PID 3280 wrote to memory of 4832	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	92
PID 3280 wrote to memory of 4832	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	92
PID 3280 wrote to memory of 3052	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	93
PID 3280 wrote to memory of 3052	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	93
PID 3280 wrote to memory of 3052	3280	4467692df3f5ba1aff4f51d021a5f5a0N.exe	93

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"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions = "1"	4467692df3f5ba1aff4f51d021a5f5a0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	4467692df3f5ba1aff4f51d021a5f5a0N.exe

C:\Users\Admin\AppData\Local\Temp\4467692df3f5ba1aff4f51d021a5f5a0N.exe
"C:\Users\Admin\AppData\Local\Temp\4467692df3f5ba1aff4f51d021a5f5a0N.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:3280
- C:\Windows\xk.exe
  C:\Windows\xk.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:1400
- 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:2064
- 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:4692
- 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:3276
- 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:2732
- 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:4832
- 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:3052

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