Threat Encyclopaedia
| Threat Name | Description Type | Threat Type | Date Added |
| Win32/Yaha.N | Threat Variant | worm | 2002-12-30 |
| Win32/Yurist | Threat Variant | trojan | 2005-08-18 |
| Win32/Yektel.A | Threat Variant | trojan | 2009-07-10 |
| Win32/Yimfoca.AA | Threat Variant | worm | 2010-08-27 |
| Win32/Yebid.A | Threat Variant | trojan | 2012-08-21 |
| Win32/Yebot.AB | Threat Variant | trojan | 2013-01-18 |
| Win32/Yoddos.AL | Threat Variant | trojan | 2013-09-14 |
| Win32/Yoddos.AR | Threat Variant | trojan | 2013-10-07 |
| Win32/Yebot.AC | Threat Variant | trojan | 2013-10-08 |
| Win64/Yebot.AB | Threat Variant | trojan | 2013-10-08 |