Antes que nada, gracias por tu ayuda, Yabe.
Pues esto es lo que ha salido del xld.amd:
AntiVir Found Heuristic/Worm.IRCScript (probable variant)
ArcaVir Found nothing
Avast Found nothing
AVG Antivirus Found nothing
BitDefender Found nothing
ClamAV Found Trojan.Gaten.A
Dr.Web Found IRC.Virus (probable variant)
F-Prot Antivirus Found nothing
Fortinet Found IRC/Gaten.A-bdr
Kaspersky Anti-Virus Found not-a-virus:Client-IRC.Win32.mIRC.551, Backdoor.IRC.Gaten.a
NOD32 Found probably a variant of IRC/Gaten.A (probable variant)
Norman Virus Control Found mIRC/Gen_EXE
UNA Found nothing
VBA32 Found Backdoor.IRC.Gaten.a
Y del xld2.amd:
AntiVir Found nothing
ArcaVir Found nothing
Avast Found nothing
AVG Antivirus Found nothing
BitDefender Found Irc.Flood.Q
ClamAV Found nothing
Dr.Web Found IRC.Flood, not a virus Program.mIRC.612
F-Prot Antivirus Found nothing
Fortinet Found W32/Flood.tool
Kaspersky Anti-Virus Found not-a-virus:AdWare.Bonzo.b, not-a-virus:Client-IRC.Win32.mIRC.612
NOD32 Found IRC/Flood application
Norman Virus Control Found nothing
UNA Found nothing
VBA32 Found IRC.Flood