If you downloaded phpBB forum software on January 26, read this report by Catalin Cimpanu:
An unknown attacker has compromised download links for the phpBB forum software, according to a statement released today by the phpBB development team.
The hacker compromised only two downloads links, for the phpBB 3.2.2 full package and the phpBB 3.2.1 -> 3.2.2 automatic updater. This is phpBB’s latest version, released on January 7, this year.
Read more on BleepingComputer for the timeframe, etc.