d0d0c3f4c31b304677547ee7c470dde52f6d9811987899f26471dbdc0c43f283

General

Target

WgaLogon.dll
Size

304KB
MD5

82b156fe5e66c65bd282c336226a3e65
SHA1

312fad3102640bb49706e9353845c4255711b5a1
SHA256

30b8720e6468311b6702d60efd8c1b27f89f9b10411ad3086c7dad96850b00b3
SHA512

e27dd6d6ef4e739f1d3f44b8c4224e56a39d04e5e1eac912a870f8d2cd75e910e873153d4c910a2b2b66f83b84feb55280e2e657f18b0b473f1dd6d16c856b5e
SSDEEP

6144:CalZlqQeTNs00gFXxC6WLOfiXkkkAc0B7bct9ID0mFs:CaA3TNsBgFXQXkkkqFs

Score

6^/10

persistence

Malware Config

Signatures

Modifies WinLogon 2 TTPs 20 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\StartShell = "WLEventStartShell"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\Impersonate = "1"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\Settings	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\Logon = "WLEventLogon"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\StopScreenSaver = "WLEventStopScreenSaver"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\PostShell = "WLEventPostShell"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\Disconnect = "WLEventDisconnect"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\Asynchronous = "0"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\DllName = "WgaLogon.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\Startup = "WLEventStartup"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\Shutdown = "WLEventShutdown"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\Lock = "WLEventLock"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\Unlock = "WLEventUnlock"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\SafeMode = "1"	rundll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\MaxWait = "4294967295"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\Logoff = "WLEventLogoff"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\StartScreenSaver = "WLEventStartScreenSaver"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\WgaLogon\Reconnect = "WLEventReconnect"	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2428	2372	WerFault.exe	30

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2268 wrote to memory of 2372	2268	rundll32.exe	30
PID 2268 wrote to memory of 2372	2268	rundll32.exe	30
PID 2268 wrote to memory of 2372	2268	rundll32.exe	30
PID 2268 wrote to memory of 2372	2268	rundll32.exe	30
PID 2268 wrote to memory of 2372	2268	rundll32.exe	30
PID 2268 wrote to memory of 2372	2268	rundll32.exe	30
PID 2268 wrote to memory of 2372	2268	rundll32.exe	30
PID 2372 wrote to memory of 2428	2372	rundll32.exe	31
PID 2372 wrote to memory of 2428	2372	rundll32.exe	31
PID 2372 wrote to memory of 2428	2372	rundll32.exe	31
PID 2372 wrote to memory of 2428	2372	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\WgaLogon.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2268
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\WgaLogon.dll,#1
  2⤵
  - Modifies WinLogon
  - Suspicious use of WriteProcessMemory
  PID:2372
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2372 -s 284
    3⤵
    - Program crash
    PID:2428