d655522f4894624950eab7e21cfa6c927c70d9048aa25aa55e8c3fe8f8acd2ac

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\system32\\IExplorer.exe\""	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\IExplorer.exe"	489b9f9eb3059677c5d0d32554172bf0N.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"	489b9f9eb3059677c5d0d32554172bf0N.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"	489b9f9eb3059677c5d0d32554172bf0N.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"	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	489b9f9eb3059677c5d0d32554172bf0N.exe

Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

Executes dropped EXE 7 IoCs

pid	Process
372	xk.exe
2340	IExplorer.exe
384	WINLOGON.EXE
3200	CSRSS.EXE
4092	SERVICES.EXE
5064	LSASS.EXE
3028	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	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	489b9f9eb3059677c5d0d32554172bf0N.exe

UPX packed file 18 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3468-0-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/files/0x000700000002346e-8.dat	upx
behavioral2/files/0x0007000000023472-106.dat	upx
behavioral2/files/0x0007000000023476-111.dat	upx
behavioral2/memory/372-113-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/memory/2340-119-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/files/0x0007000000023478-120.dat	upx
behavioral2/files/0x0007000000023479-127.dat	upx
behavioral2/memory/384-125-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/memory/3200-132-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/files/0x000700000002347a-134.dat	upx
behavioral2/memory/4092-136-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/files/0x000700000002347b-142.dat	upx
behavioral2/memory/4092-140-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/files/0x000700000002347c-147.dat	upx
behavioral2/memory/5064-149-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/memory/3028-154-0x0000000000400000-0x000000000042F000-memory.dmp	upx
behavioral2/memory/3468-156-0x0000000000400000-0x000000000042F000-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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\LogonAdmin = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\CSRSS.EXE"	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\System Monitoring = "C:\\Users\\Admin\\Local Settings\\Application Data\\WINDOWS\\LSASS.EXE"	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xk = "C:\\Windows\\xk.exe"	489b9f9eb3059677c5d0d32554172bf0N.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"	489b9f9eb3059677c5d0d32554172bf0N.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"	489b9f9eb3059677c5d0d32554172bf0N.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\shell.exe	489b9f9eb3059677c5d0d32554172bf0N.exe
File created	C:\Windows\SysWOW64\shell.exe	489b9f9eb3059677c5d0d32554172bf0N.exe
File created	C:\Windows\SysWOW64\Mig2.scr	489b9f9eb3059677c5d0d32554172bf0N.exe
File created	C:\Windows\SysWOW64\IExplorer.exe	489b9f9eb3059677c5d0d32554172bf0N.exe
File opened for modification	C:\Windows\SysWOW64\IExplorer.exe	489b9f9eb3059677c5d0d32554172bf0N.exe
File opened for modification	C:\Windows\SysWOW64\Mig2.scr	489b9f9eb3059677c5d0d32554172bf0N.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\xk.exe	489b9f9eb3059677c5d0d32554172bf0N.exe
File created	C:\Windows\xk.exe	489b9f9eb3059677c5d0d32554172bf0N.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	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	489b9f9eb3059677c5d0d32554172bf0N.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

Modifies Control Panel 4 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\Desktop\	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\Desktop\SCRNSAVE.EXE = "C:\\Windows\\system32\\Mig~mig.SCR"	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\Desktop\ScreenSaverIsSecure = "0"	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\Desktop\ScreenSaveTimeOut = "600"	489b9f9eb3059677c5d0d32554172bf0N.exe

Modifies registry class 15 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\piffile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\batfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\ = "File Folder"	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\comfile\shell\open\command\ = "\"C:\\Windows\\system32\\shell.exe\" \"%1\" %*"	489b9f9eb3059677c5d0d32554172bf0N.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3468	489b9f9eb3059677c5d0d32554172bf0N.exe
3468	489b9f9eb3059677c5d0d32554172bf0N.exe

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
3468	489b9f9eb3059677c5d0d32554172bf0N.exe
372	xk.exe
2340	IExplorer.exe
384	WINLOGON.EXE
3200	CSRSS.EXE
4092	SERVICES.EXE
5064	LSASS.EXE
3028	SMSS.EXE

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3468 wrote to memory of 372	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	85
PID 3468 wrote to memory of 372	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	85
PID 3468 wrote to memory of 372	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	85
PID 3468 wrote to memory of 2340	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	87
PID 3468 wrote to memory of 2340	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	87
PID 3468 wrote to memory of 2340	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	87
PID 3468 wrote to memory of 384	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	88
PID 3468 wrote to memory of 384	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	88
PID 3468 wrote to memory of 384	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	88
PID 3468 wrote to memory of 3200	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	89
PID 3468 wrote to memory of 3200	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	89
PID 3468 wrote to memory of 3200	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	89
PID 3468 wrote to memory of 4092	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	91
PID 3468 wrote to memory of 4092	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	91
PID 3468 wrote to memory of 4092	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	91
PID 3468 wrote to memory of 5064	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	92
PID 3468 wrote to memory of 5064	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	92
PID 3468 wrote to memory of 5064	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	92
PID 3468 wrote to memory of 3028	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	93
PID 3468 wrote to memory of 3028	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	93
PID 3468 wrote to memory of 3028	3468	489b9f9eb3059677c5d0d32554172bf0N.exe	93

System policy modification 1 TTPs 4 IoCs

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions = "1"	489b9f9eb3059677c5d0d32554172bf0N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	489b9f9eb3059677c5d0d32554172bf0N.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	489b9f9eb3059677c5d0d32554172bf0N.exe

C:\Users\Admin\AppData\Local\Temp\489b9f9eb3059677c5d0d32554172bf0N.exe
"C:\Users\Admin\AppData\Local\Temp\489b9f9eb3059677c5d0d32554172bf0N.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:3468
- C:\Windows\xk.exe
  C:\Windows\xk.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:372
- 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:2340
- 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:384
- 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:3200
- 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:4092
- 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:5064
- 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:3028

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