Researchers at Chronicle discovered that the source code for hacking tools used by the Iran-linked group APT34, also called Oil Rig, had been leaked on Telegram's group messaging platform.
Why it matters: While this isn't as grim as the ShadowBrokers leaks, where far more potent NSA tools were leaked and eventually used by North Korea and Russia in destructive attacks, the Oil Rig leaks still offer new attackers a successful toolkit to use in their own attacks.
Go deeper: Hacking guides are cheap, plentiful and out of date