Some cyberattacks targeting executives begin with a look around social media.

Small pieces of personal life shared publicly on social media can sometimes lead to big breaches, and executives in particular need to be careful about what they post.

Pen testers and ethical hackers told IT Brew that the tiniest bits of online info can lead to system access.

Rachel Tobac, co-founder and CEO of SocialProof Security—whom you might recall from her hacking demo on 60 Minutes—often sees execs leaving a trail of valuable data on Instagram, Twitter, and other social media sites.

Say, an exec posting a LinkedIn photo of a quarterly retreat, with a whiteboard of notes in the background.

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