Emails claim to be from United Parcel Service of America. Include a file containing a malicious Trojan horse which Sophos detects as Troj/Agent-KBE. The tracking reference number used in the emails subject line changes each time. Weve seen similar attacks on many occasions taking advantage of the names of shipping companies like UPS, DHL and DHL. Shouldnt we all be wise to this kind of social engineering by now? Do you know who is responsible for this attack?”]
Source: https://nakedsecurity.sophos.com/2009/06/01/week-failed-delivery-malware-attack/