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Twitter warns of additional hacks, threats

Company says the "attacks will continue," particularly against high-profile media companies.

Twitter knows that many high-profile accounts have suffered at the hands of hackers in recent days, but is putting much of the onus of responsibility on the account holders themselves.

On Monday, Twitter sent a memo to major media and news outlets about the threat -- if they hadn't known already or at least reported on some of them -- and noted that it believed these "attacks will continue." (Buzzfeed posted the memo in full.)

Twitter acknowledged that the "incidents" appear to be "spear phishing attacks that target your corporate email," that appear to be legitimate e-mails, and that are often sent directly to the account holder.

The memo also noted: "Don't use this computer to read email or surf the web, to reduce the chances of malware infection," and to "minimize the number of people that have access" to accounts to prevent human error.

The microblogging service is also working on two-factor authentication, a system in which users can strengthen their accounts by using a double-step method of logging in. Twitter has thus far remained quiet on the matter.

Over the past week, numerous CBS News accounts were hacked into, along with the Associated Press' accounts. The AP hack resulted in a fake tweet about an apparent explosion at the White House, which led to the Dow Jones Industrial Average into a flash plunge last week, dropping more than 100 points in a matter of seconds.

A group called the Syrian Electronic Army claimed responsibility for a number of the attacks.

This story originally posted as "Twitter warns of more hacks, threats to come; issues media memo" on ZDNet.