a Trojan horse

a Trojan horse

someone or something that attacks the group or organization it belongs to
Usage notes: In Greek stories, the Trojan horse was a large wooden horse that the Greeks used to take soldiers secretly into the city of Troy in order to destroy it.
Traditional Labour supporters have accused the new leadership of being a Trojan horse trying to destroy the party from within.
See work like a dog
See also: horse, Trojan
References in periodicals archive ?
I am concerned there is a Trojan Horse aspect to this.
A Trojan horse has been found in the wild masquerading as program for Mac OS X called "'PokerGame".
Details of a Trojan horse being sent out to e-mail addresses under the guise of a warning about a university rapist have been issued by SophosLabs, the Sophos network of virus, spyware and spam analysis centres.
It was during a famous matchup in 1973 that Notre Dame students rolled a Trojan horse onto the field - a visible rebuke to a Trojan force named for an ancient losing army.
Ron Paul of Texas, one of eight House Republicans who voted against the measure, says the legislation is a Trojan horse.
For a Trojan horse to spread, a user must "invite" the program onto his/her computer--for example, by opening an e-mail attachment or downloading and running a file from the Internet.
This is because a Trojan Horse is created not to be highly visible in its destructive action, but rather to remain undetected as long as possible while stealing data.
Typically, an individual e-mails a Trojan Horse to you--it does not e-mail itself--and it may arrive in the form of a joke program of software of some sort.
A Trojan Horse program is a malicious program that pretends to be a benign application; a Trojan Horse program purposefully does something the user does not expect.
A Trojan horse is a program concealing harmful code that usually makes a computer or network available to unauthorized users in an appealing or unsuspicious package.
So maybe it is not such a good idea to author a Trojan Horse.
The anti-AIDS drug AZT functions like a Trojan horse.
The primary danger of this worm is that once opened, it attaches a Trojan horse on the user's computer that makes the computer vulnerable to hackers.
Some members of the Apple Macintosh community have claimed that Leap-A is a Trojan horse, and not a virus or worm, because it requires user interaction (the user has to receive a file via iChat, and manually choose to open and run the file contained inside).
Details of a Trojan horse that interrupts adult websites with messages from the Koran have been revealed by SophosLabs, a network of spam, spyware and virus analysis centres for antivirus company Sophos.