A few of the FT's dozens of Twitter feeds and blogs broadcast messages in support of Syrian President Bashar Assad and attacking Syria's opposition. One described the Syrian rebel group Jabhat al-Nusra as terrorists and linked to a graphic video of a hooded man shooting kneeling prisoners in the back of the head.
"Syrian Electronic Army Was Here," the group crowed on one of the FT's Twitter feeds.
One of the hackers said his group was behind the attack but declined to answer further questions. The group has apparently spent much of the past 24 hours trying to break into the FT's system.
One internal company memo distributed Thursday and seen by The Associated Press warned FT employees not to click on suspicious emails, while a second earlier Friday warned the FT was "facing a phishing attack."
Phishing describes the use of innocuous-looking emails or websites to trick users into giving up their passwords or other details. The Syrian Electronic Army has routinely used the tactic to take control of Twitter feeds of other media organizations.
Recent targets have included the BBC, al-Jazeera, E! Online, and satirical newspaper The Onion. Last month the group claimed responsibility for hacking The AP's Twitter feed.