A computer virus has infected more than 10,000 machines and directed them to connect with and attempt to overwhelm online forums critical of the ruling Vietnamese Communist Party, security researchers said on Thursday.
The resulting denial-of-service attacks on a handful of sites show how such programs are increasingly being used to target opposition voices.
Similar attacks have been waged on anti-Russian sites operated from conflict zones in the Caucuses and on some more mainstream sites run by politicians at odds with the Kremlin.
Researchers at SecureWorks, who dubbed the new virus Vecebot, said they couldn’t prove that it was unleashed by the government or someone working for it. Such software is rarely traced to an author.