McAfee > Theat Center > Virus Detail Page

Overview

This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Aliases

• PWSteal.Trojan (Symantec)

• Win32.Reign.N (CA)

Characteristics

Detection was added to cover for a maliclious 32 bit PE file, having a random 8 character name. The filesize of the .exe is 78336 bytes. The aim is to steal login/password data from online e-commerce/banking transactions.

When it is executed, it runs silently, no gui messages appear on the screen. It removes itself from the location where it is run from.

It drops a file called iyus.dll , having a filesize of 241664 bytes, into the  %windows\system32 directory, for example on a win2003 system:

• c:\windows\system32\iyus.dll
• c:\windows\system32\xtempx.xxx
• c:\windows\system32\iyus\randomfilename.exe

The file xtempx.xxx is a temporary storage file, might be used for keylogging.

The newly created iyus directory is normally not directly visible using windows explorer. However the iyus directory and the .exe file inside are visible when using the command prompt.

It creates a registry entry under:[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion]   "iyus"=hex:03,a5,85,40,01,00,00,00 and

Symptoms

• Presence of the files mentioned above

Method of Infection

• This is not a self replicating virus. Manual execution of the binary starts the password stealer trojan.

Removal

All Users:
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).

Additional Windows ME/XP removal considerations

Variants

Variants

N/A

All Information

Overview -

This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Aliases

• PWSteal.Trojan (Symantec)

• Win32.Reign.N (CA)

Characteristics

Characteristics -

Detection was added to cover for a maliclious 32 bit PE file, having a random 8 character name. The filesize of the .exe is 78336 bytes. The aim is to steal login/password data from online e-commerce/banking transactions.

When it is executed, it runs silently, no gui messages appear on the screen. It removes itself from the location where it is run from.

It drops a file called iyus.dll , having a filesize of 241664 bytes, into the  %windows\system32 directory, for example on a win2003 system:

• c:\windows\system32\iyus.dll
• c:\windows\system32\xtempx.xxx
• c:\windows\system32\iyus\randomfilename.exe

The file xtempx.xxx is a temporary storage file, might be used for keylogging.

The newly created iyus directory is normally not directly visible using windows explorer. However the iyus directory and the .exe file inside are visible when using the command prompt.

It creates a registry entry under:[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion]   "iyus"=hex:03,a5,85,40,01,00,00,00 and

Symptoms

Symptoms -

• Presence of the files mentioned above

Method of Infection

Method of Infection -

• This is not a self replicating virus. Manual execution of the binary starts the password stealer trojan.

Removal -

Removal -

All Users:
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).

Additional Windows ME/XP removal considerations

Variants

Variants -

N/A