I imagine it's a data scraper bot that is harvesting the thread subheader, for example:
DimitriP, Gertjan, mk_, darkspr1te, BennoG, RJSV, JMK, slavoy, Kim Christensen, djsb, coppercone2 and 183 Guests are viewing this board.
So a single bot machine (which explains the common IP address) located in India, Russia, North Korea, could scrape this list of names, and tryout some obvious passwords.
There's probably a bot just sitting on the Test Equipment forum (biggest forum) just scraping away.