8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\eksplorasi.exe\""	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\eksplorasi.exe\""	smss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\eksplorasi.exe\""	winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\eksplorasi.exe\""	services.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\eksplorasi.exe\""	lsass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe \"C:\\Windows\\eksplorasi.exe\""	inetinfo.exe

Modifies visibility of file extensions in Explorer 2 TTPs 6 IoCs

Hidden Files and Directories

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	smss.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	winlogon.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	services.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	lsass.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	inetinfo.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 6 IoCs

Hidden Files and Directories

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	services.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	lsass.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	inetinfo.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	smss.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	winlogon.exe

Disables RegEdit via registry modification 12 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "0"	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	smss.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "0"	winlogon.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	winlogon.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "0"	services.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "0"	lsass.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	lsass.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	inetinfo.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "0"	smss.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	services.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "0"	inetinfo.exe

Disables cmd.exe use via registry modification 6 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableCMD = "0"	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableCMD = "0"	smss.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableCMD = "0"	winlogon.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableCMD = "0"	services.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableCMD = "0"	lsass.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableCMD = "0"	inetinfo.exe

Executes dropped EXE 5 IoCs

pid	Process
3748	smss.exe
824	winlogon.exe
3116	services.exe
1848	lsass.exe
3864	inetinfo.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Empty.pif	smss.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Empty.pif	smss.exe

Adds Run key to start application 2 TTPs 12 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Bron-Spizaetus = "\"C:\\Windows\\ShellNew\\bronstab.exe\""	smss.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Tok-Cirrhatus = "\"C:\\Users\\Admin\\AppData\\Local\\smss.exe\""	smss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Bron-Spizaetus = "\"C:\\Windows\\ShellNew\\bronstab.exe\""	services.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Tok-Cirrhatus = "\"C:\\Users\\Admin\\AppData\\Local\\smss.exe\""	services.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Bron-Spizaetus = "\"C:\\Windows\\ShellNew\\bronstab.exe\""	lsass.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Tok-Cirrhatus = "\"C:\\Users\\Admin\\AppData\\Local\\smss.exe\""	inetinfo.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Tok-Cirrhatus = "\"C:\\Users\\Admin\\AppData\\Local\\smss.exe\""	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Bron-Spizaetus = "\"C:\\Windows\\ShellNew\\bronstab.exe\""	winlogon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Tok-Cirrhatus = "\"C:\\Users\\Admin\\AppData\\Local\\smss.exe\""	winlogon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Tok-Cirrhatus = "\"C:\\Users\\Admin\\AppData\\Local\\smss.exe\""	lsass.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Bron-Spizaetus = "\"C:\\Windows\\ShellNew\\bronstab.exe\""	inetinfo.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Bron-Spizaetus = "\"C:\\Windows\\ShellNew\\bronstab.exe\""	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Admin's Setting.scr	smss.exe
File opened for modification	C:\Windows\SysWOW64\Admin's Setting.scr	smss.exe

Drops file in Windows directory 14 IoCs

description	ioc	Process
File opened for modification	C:\Windows\ShellNew\bronstab.exe	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe
File created	C:\Windows\eksplorasi.exe	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe
File opened for modification	C:\Windows\ShellNew\bronstab.exe	winlogon.exe
File opened for modification	C:\Windows\eksplorasi.exe	inetinfo.exe
File created	C:\Windows\ShellNew\bronstab.exe	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe
File opened for modification	C:\Windows\eksplorasi.exe	smss.exe
File opened for modification	C:\Windows\ShellNew\bronstab.exe	services.exe
File opened for modification	C:\Windows\eksplorasi.exe	services.exe
File opened for modification	C:\Windows\ShellNew\bronstab.exe	lsass.exe
File opened for modification	C:\Windows\eksplorasi.exe	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe
File opened for modification	C:\Windows\ShellNew\bronstab.exe	smss.exe
File opened for modification	C:\Windows\eksplorasi.exe	winlogon.exe
File opened for modification	C:\Windows\eksplorasi.exe	lsass.exe
File opened for modification	C:\Windows\ShellNew\bronstab.exe	inetinfo.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000_Classes\Local Settings	explorer.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
3912	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe
3748	smss.exe
824	winlogon.exe
3116	services.exe
1848	lsass.exe
3864	inetinfo.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3912 wrote to memory of 632	3912	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe	86
PID 3912 wrote to memory of 632	3912	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe	86
PID 3912 wrote to memory of 632	3912	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe	86
PID 3912 wrote to memory of 3748	3912	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe	87
PID 3912 wrote to memory of 3748	3912	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe	87
PID 3912 wrote to memory of 3748	3912	8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe	87
PID 3748 wrote to memory of 824	3748	smss.exe	88
PID 3748 wrote to memory of 824	3748	smss.exe	88
PID 3748 wrote to memory of 824	3748	smss.exe	88
PID 3748 wrote to memory of 2064	3748	smss.exe	89
PID 3748 wrote to memory of 2064	3748	smss.exe	89
PID 3748 wrote to memory of 2064	3748	smss.exe	89
PID 3748 wrote to memory of 944	3748	smss.exe	91
PID 3748 wrote to memory of 944	3748	smss.exe	91
PID 3748 wrote to memory of 944	3748	smss.exe	91
PID 3748 wrote to memory of 3116	3748	smss.exe	93
PID 3748 wrote to memory of 3116	3748	smss.exe	93
PID 3748 wrote to memory of 3116	3748	smss.exe	93
PID 3748 wrote to memory of 1848	3748	smss.exe	94
PID 3748 wrote to memory of 1848	3748	smss.exe	94
PID 3748 wrote to memory of 1848	3748	smss.exe	94
PID 3748 wrote to memory of 3864	3748	smss.exe	96
PID 3748 wrote to memory of 3864	3748	smss.exe	96
PID 3748 wrote to memory of 3864	3748	smss.exe	96

C:\Users\Admin\AppData\Local\Temp\8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.exe
"C:\Users\Admin\AppData\Local\Temp\8928b5c31c747de0a33cf7696c63ffc1b9f50e6684d901a2c99c878f0e50777a.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
- Disables cmd.exe use via registry modification
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3912
- C:\Windows\SysWOW64\explorer.exe
  explorer.exe
  2⤵
  - Modifies registry class
  PID:632
- C:\Users\Admin\AppData\Local\smss.exe
  C:\Users\Admin\AppData\Local\smss.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visibility of file extensions in Explorer
  - Modifies visiblity of hidden/system files in Explorer
  - Disables RegEdit via registry modification
  - Disables cmd.exe use via registry modification
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Drops file in System32 directory
  - Drops file in Windows directory
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3748
- - C:\Users\Admin\AppData\Local\winlogon.exe
    C:\Users\Admin\AppData\Local\winlogon.exe
    3⤵
    - Modifies WinLogon for persistence
    - Modifies visibility of file extensions in Explorer
    - Modifies visiblity of hidden/system files in Explorer
    - Disables RegEdit via registry modification
    - Disables cmd.exe use via registry modification
    - Executes dropped EXE
    - Adds Run key to start application
    - Drops file in Windows directory
    - Suspicious use of SetWindowsHookEx
    PID:824
- - C:\Windows\SysWOW64\at.exe
    at /delete /y
    3⤵
    PID:2064
- - C:\Windows\SysWOW64\at.exe
    at 17:08 /every:M,T,W,Th,F,S,Su "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\WowTumpeh.com"
    3⤵
    PID:944
- - C:\Users\Admin\AppData\Local\services.exe
    C:\Users\Admin\AppData\Local\services.exe
    3⤵
    - Modifies WinLogon for persistence
    - Modifies visibility of file extensions in Explorer
    - Modifies visiblity of hidden/system files in Explorer
    - Disables RegEdit via registry modification
    - Disables cmd.exe use via registry modification
    - Executes dropped EXE
    - Adds Run key to start application
    - Drops file in Windows directory
    - Suspicious use of SetWindowsHookEx
    PID:3116
- - C:\Users\Admin\AppData\Local\lsass.exe
    C:\Users\Admin\AppData\Local\lsass.exe
    3⤵
    - Modifies WinLogon for persistence
    - Modifies visibility of file extensions in Explorer
    - Modifies visiblity of hidden/system files in Explorer
    - Disables RegEdit via registry modification
    - Disables cmd.exe use via registry modification
    - Executes dropped EXE
    - Adds Run key to start application
    - Drops file in Windows directory
    - Suspicious use of SetWindowsHookEx
    PID:1848
- - C:\Users\Admin\AppData\Local\inetinfo.exe
    C:\Users\Admin\AppData\Local\inetinfo.exe
    3⤵
    - Modifies WinLogon for persistence
    - Modifies visibility of file extensions in Explorer
    - Modifies visiblity of hidden/system files in Explorer
    - Disables RegEdit via registry modification
    - Disables cmd.exe use via registry modification
    - Executes dropped EXE
    - Adds Run key to start application
    - Drops file in Windows directory
    - Suspicious use of SetWindowsHookEx
    PID:3864

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry