ru.unix.bsd

 
 - RU.UNIX.BSD ------------------------------------------------------------------
 From : Alexander Starostin                  2:5020/1297.153 07 Mar 2008  02:16:20
 To : All
 Subject : greylisting
 -------------------------------------------------------------------------------- 
 

 
 malware становится всё умнее:
 
 ===
 Strings in the Ozdok executable indicate that Ozdok is aware of mail servers
 employing greylisting as a means to combat spam, and is able to retry messages
 after a timeout in order to defeat these protections. Additionally, Ozdok
 attempts to pattern-match error messages from SMTP servers (in multiple
 languages); in order to determine the end result status of messages it attempts 
 to send. As a result, it may be effective in helping the bot owner maintain a
 clean list of email addresses by culling addresses that respond with "no such
 user" and similar error messages, while keeping addresses that were simply
 rejected because a particular mail passed a spam score threshold.
 ===
 http://www.secureworks.com/research/threats/ozdok/
 
 Have a nice day!
 
 ---
  * Origin:  (2:5020/1297.153)
 
 

Вернуться к списку тем, сортированных по: возрастание даты  уменьшение даты  тема  автор