Vulcanbot

Vulcanbot is the name of a botnet predominantly spread in Vietnam. The botnet began to spread after the website of the Vietnamese Professionals Society (vps.org) was hacked and the legitimate Vietnamese keyboard driver (VPSKeys) hosted on the site was replaced with a backdoored version. Google posted on its blog that it believed the botnet thus created was used predominantly to DDoS bloggers critical of the bauxite mining in Vietnam, thus making it a politically motivated attack.

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Wikipedia