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Home   »   SPF

DMARC and Spam: Why It Matters

  • Posted on:March 23, 2015 at 11:19 am
  • Posted in:Spam
  • Author:
    Jon Oliver (Senior Architect)
2

Recently I discussed how TorrentLocker spam was using email authentication for its spam runs. At the time, I suggested that these spam runs were using email authentication to gather information about victim networks and potentially improve the ability to evade spam filters. DomainKeys Identified Mail’s (DKIM) own specification mentions the possibility of messages with from “trusted sources” and with a…

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Tags: DKIMDMARCSpamSPF

Phishing and the .gov TLD

  • Posted on:March 22, 2015 at 9:22 pm
  • Posted in:Spam
  • Author:
    Trend Micro
2

Analysis by Marshall Chen, Yi Lee, and Joe Wu Brand owners frequently use SPF and DKIM to protect their brands from email forgery. For example, a brand owner could register the same domain name under multiple top-level domains (TLDs) (such as .com, .net, .org, etcetera) and announce SPF/DKIM records for all of these domains (even if they were not actively…

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Tags: .govDKIMemail authenticationSpamSPF

How Cybercriminals Dodge Email Authentication

  • Posted on:December 18, 2014 at 7:40 pm
  • Posted in:Spam
  • Author:
    Marshall Chen (Threats Analyst)
0

Email authentication and validation is one method that is used to help bring down the levels of spam and phishing by identifying senders so that malicious emails can be identified and discarded. Two frameworks are in common usage today; these are SPF and DKIM. SPF (Sender Policy Framework): Defined in RFC 7208, SPF provides a…

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Tags: DKIMDMARCemail authenticationSpamSPF

KELIHOS Spambot Highlights Security Risk in SPF Records

  • Posted on:October 1, 2014 at 2:50 am
  • Posted in:Botnets, Malware, Spam
  • Author:
    Michael Casayuran (Anti-spam Research Engineer)
0

During the last week of August 2014, we observed a salad spam surge caused by KELIHOS spambot.  Salad spam contains gibberish words in the email body, and is usually employed by cybercriminals so as to bypass spam filters. Here are some samples we spotted: Figures 1-2: Screenshots of spammed messages Majority of this outbreak’s victims are from the…

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Tags: botnetemail securityKELIHOSMalwareSpamSPFspoofing

Security Predictions for 2020

  • Cybersecurity in 2020 will be viewed through many lenses — from differing attacker motivations and cybercriminal arsenal to technological developments and global threat intelligence — only so defenders can keep up with the broad range of threats.
    Read our security predictions for 2020.

Business Process Compromise

  • Attackers are starting to invest in long-term operations that target specific processes enterprises rely on. They scout for vulnerable practices, susceptible systems and operational loopholes that they can leverage or abuse. To learn more, read our Security 101: Business Process Compromise.

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