: Leveraging Email Delivery for Spam Mitigation

70 Pages·2012·9.79 MB·English

B@BEL: Leveraging Email Delivery
for Spam Mitigation
Gianluca Stringhini, Manuel Egele, Apostolis Zarras,
Thorsten Holz, Christopher Kruegel,
and Giovanni Vigna
USENIXSecuritySymposium
August 8, 2012
Spam is a big problem
(cid:73) Wealthy economy behind spam
(cid:73) 77% of emails are spam
(cid:73) Botnets responsible for 85% of spam
Stringhinietal. B@BEL:LeveragingEmailDeliveryforSpamMitigation
Content analysis (What?)
Origin analysis (Who?)
Traditional spam detection
Stringhinietal. B@BEL:LeveragingEmailDeliveryforSpamMitigation
Origin analysis (Who?)
Traditional spam detection
Content analysis (What?)
Stringhinietal. B@BEL:LeveragingEmailDeliveryforSpamMitigation
Content analysis (What?)
Traditional spam detection
Origin analysis (Who?)
Stringhinietal. B@BEL:LeveragingEmailDeliveryforSpamMitigation
Existing methods have problems
Stringhinietal. B@BEL:LeveragingEmailDeliveryforSpamMitigation
Existing methods have problems
Stringhinietal. B@BEL:LeveragingEmailDeliveryforSpamMitigation
Existing methods have problems
Stringhinietal. B@BEL:LeveragingEmailDeliveryforSpamMitigation
Our approach
The way clients interact with SMTP servers (How?)
Stringhinietal. B@BEL:LeveragingEmailDeliveryforSpamMitigation
B@BEL
Two instances of our approach
SMTP dialects
(cid:73)
Feedback manipulation
(cid:73)
Stringhinietal. B@BEL:LeveragingEmailDeliveryforSpamMitigation