Big danger from Small Trojan
Over 120,000 emails containing a downloader Trojan named Small.bdq have been sent to a highly targeted group of UK businesses since 9.10pm on 15 July, security experts warned today.
According to email security company BlackSpider Technologies, the Trojan is distinguished by its targeting specific companies across Europe during 10-minute periods, probably using spammers' directory lists.
The targeted businesses vary in size and industry sector, and the attack is continuing into Monday morning. BlackSpider reported on a similar attack on 8 July.
The window of exposure before the first of BlackSpider's antivirus vendors issued a patch was 12 hours and 30 minutes, during which time an estimated 58,000 copies of the Trojan were sent out.
Subject lines vary and include: 'Security', 'Support', 'Update', 'Mail', 'Networking' and 'Security Update'.
The email claims to be from an individual's IT team warning that their system has been compromised and is distributing spam.
