W32/HLLP.Philis.hc is a file infecting virus. It searches for executable files on the infected machine to prepend its viral code and due to a bug in virus code it may corrupt the executables. It is also responsible for dropping a .DLL file, which downloads password stealing trojans.
On execution, it copies itself in %WinDir%\Uninstall\ folder as rundl132.exe and adds a load registry entry to activate itself on reboot.
It also creates the following registry entries:
It drops a file named Richdll.dll (detected as W32/HLLP.Philis.dll) in %WinDir%.
It then injects this dll in processes Explorer.exe and IExplor.exe. This dll is responsible for opening a backdoor and also downloading other password stealing trojans from the following locations:
W32/HLLP.Philis.hc searches for executable files and prepends its viral code to target files.
It prepends itself to the original .EXE file, so whenever that file is executed the virus is also executed. The prepending virus code is written using Borland Delphi.
The virus creates files with the name "_desktop.ini" in every folder that it visits while looking for executable files to infect. This is created as a hidden system file and contains the date on which virus was executed to visit the folder in which the file resides. The date is shown in yyyy/mm/dd format.
The virus tries to spread via existing network shares. It searches for all active machines within the subnet and when it finds an active machine it sends an ICMP ping request and waits for a response. After getting the ping response it tries to access the ADMIN$, IPC$ and any other shares that might exist on the machine.
If the virus is able to access a shared resource, it first copies "_desktop.ini" to the root of the share to mark the share as visited and then infects executables present in the share.
In the case of a shared printer, the viruses' infection routine effectively creates printer job to print the date as contained in "_desktop.ini" file that the virus tries to copy.
The virus attempts to terminate the processes of several security products if running on the affected system.
W32/HLLP.Philis.hc is a file infecting virus. Infection starts with manual execution of the binary. For spreading, the virus also relies on improperly configured/protected (open) shared drives.
Use current engine and DAT files for detection and removal.
Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).
But in some particular cases, the following steps need to be taken.
Please go to the Microsoft Recovery Console and restore a clean MBR.
On Windows XP:
On Windows Vista and 7: