If they can install malware on the device, wouldn't it be easier to use something like the accessibility features of Android to just scrape the content or maybe take Screenshots, send them home and use OCR?
Sounds like they just remotely root the device and then extract all data on it, with a special utility that can display the Whatsapp database in a neat way.
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[ 4.7 ms ] story [ 26.1 ms ] threadIf this were any site other than Schneier we'd all be screaming "blogspam!".
Some of us can't read the original because we don't want malware.
http://www.networkworld.com/article/3021113/security/forbes-...