Trojanized versions of PuTTY utility being used to spread backdoor
Researchers from security firm Mandiant said on Thursday that at least one customer it serves had an employee who installed the fake network utility by accident. The incident caused the employer to become infected with a backdoor tracked by researchers as Airdry.v2. The file was transmitted by a group Mandiant tracks as UNC4034.
Pretty sure this fits the theme of this forum.