Troj/Legmir-M is a password stealing Trojan that logs keystrokes
(e.g. passwords) and sends this information to an external email address
via SMTP.
Troj/Legmir-M especially targets the "Legend of Mir" computer game.
On execution Troj/Legmir-M copies itself to the Windows folder with the filename csrss.exe and to the Windows system folder with the filename WinS0cks.dll and adds the following entries to the registry to ensure it is run on system logon:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Runcsrss\csrss
with the path to csrss.exe file.
Troj/Legmir-M attempts to terminate processes related to the following applications:
EGHOST.EXE
MAILMON.EXE
KAVPFW.EXE
RAVTIMER.EXE
RAVMON.EXE
CCENTER.EXE
Troj/Legmir-M also attempts to shut down ZoneAlarm.
Troj/Legmir-M may create a keylogger DLL file that is detected as Troj/Legmir-E.