This is not a trojan or a virus. Nastysex is a program to show
pornographic images. We sometimes get queries about it, as it can
easily cause substantial phone costs.
The program is distributed in several different version from a wide
range of XXX web sites. Filenames include SEXWARE.EXE and
XXXFILES.EXE.
When installing the software, it explains that the software is going
to call out with a modem to download pornographics pictures "from
another country" as they are "too explicit to be stored in USA".
The user has a free choice to decline the offer. If he does, he gets
this display:
If the user enters his user info and his modem's COM port, the software
will call out to Guyana in Southern America (phone number: +592 279
156) and will download XXX pictures.
Although this can easily cause huge phone bills, the program does not
try to hide the fact that it's going to call to another country.
Thus, this is not a trojan and F-Secure Anti-Virus WILL NOT detect or
stop this program.