Your question seems to be too general. However, Islam does stand for
better cooperation and communications with nations who are not
destroying and fighting us. This is clearly stated in Almighty Allah’s
saying: “Allah forbiddeth you not those who warred not against you on
account of religion and drove you not out from your homes, that ye should
show them kindness and deal justly with them. Lo ! Allah loveth the just
dealers. Allah forbiddeth you only those who warred against you on
account of religion and have driven you out from your homes and helped
to drive you out, that ye make friends of them. Whosoever maketh friends
of them (All) such are wrong doers.” (Al-Mumtahanah: 8-9). This means
that one should differentiate between those enemies who are killing our
innocent and helpless Muslims around the world and those enemies who
help or assist them in doing so.
which are meant to murder and kill Muslims. Furthermore, Muslims
should be able to discover the plans and strategies of our enemies in order
for them to come up with strategies that will protect us against the attacks
of the enemies.
In this regard, I shall say there is no harm or prohibition to hack any site
meant to destroy Muslims or occupy our lands. It is a legitimate right to
defend ourselves by using all possible means and tools including hacking
and destroying those evil sites.