April—May 2013 — A series of targeted attacks began, using the Bitterbug malware family and later to be named Operation Arachniphobia. See the detailed reports from FireEye and ThreatConnect, and the overview from Security Affairs.
May 2013 — At the same time, a targeted attack out of India was trying to steal information from Pakistan, using phishing emails with Word and PDF files apparently containing Indian military information. It was a rather simple attack, although it seems to have had some success. Read the overview or the more detailed report.