More info on the malware:

> The OSX/Keydnap backdoor is equipped with a mechanism to gather and exfiltrate passwords and keys stored in OS X’s keychain. The author simply took a proof-of-concept example available on Github called Keychaindump. It reads securityd’s memory and searches for the decryption key for the user’s keychain. This process is described in a paper by K. Lee and H. Koo. One of the reasons we think the source was taken directly from Github is that the function names in the source code are the same in the Keydnap malware.

Source: http://www.welivesecurity.com/2016/07/06/new-osxkeydnap-malw...