Mitglieder

When run, the trojan installs itself to system. It copies its file as SYSTEM.EXE to Windows System directory and creates the following entry in the System Registry:

[HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] "ssgrate.exe" = "%winsysdir%\system.exe"

where %winsysdir% is the name of Windows System directory.

The trojan also creates another entry in the Registry where it stores its internal variables.

Then the trojan starts a thread that accesses 15 different websites and opens a PHP page there with certain parameters. This way the trojan reports its ID, proxy port and IP of infected computers to its authors.

After that trojan starts a thread that terminates processes with the following names:

ATUPDATER.EXE AVWUPD32.EXE AVPUPD.EXE LUALL.EXE DRWEBUPW.EXE ICSSUPPNT.EXE ICSUPP95.EXE UPDATE.EXE NUPGRADE.EXE ATUPDATER.EXE AUPDATE.EXE AUTODOWN.EXE AUTOTRACE.EXE AUTOUPDATE.EXE AVXQUAR.EXE CFIAUDIT.EXE MCUPDATE.EXE NUPGRADE.EXE

The trojan has 3 links in its body that point to a data stealing trojan that is located on 3 different websites. This trojan is detected as 'Trojan.PSW.Ldpinch.as'. The infected files have been recently removed from those website already.

The trojan has a mail relay that functions on the certain port (in the sample we got the port number is 39999).