Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Perimeter

5/17/2009
03:51 AM
Gadi Evron
Gadi Evron
Commentary
Connect Directly
Twitter
LinkedIn
RSS
E-Mail
50%
50%

Lessons From Fighting Cybercrime

The history of anti-spam teaches us about half-baked ideas and how people succeeded or failed to implement them. The analogy of evolution, while limited, demonstrates how reactionary solutions can achieve strategic goals before they are made obsolete by countermeasures.

The history of anti-spam teaches us about half-baked ideas and how people succeeded or failed to implement them. The analogy of evolution, while limited, demonstrates how reactionary solutions can achieve strategic goals before they are made obsolete by countermeasures.How do you herd cats? In a series of blogs starting today, I'll explore the history of fighting cybercrime and how and why certain solutions worked while others failed, how we can recreate success, and what lessons we can distill to build business solutions, affect change in communities -- and even fight terrorism.

One of many failed spam-fighting ideas is the idea of charging for email (raising the cost of sending email): spammers would have supposedly made less money, making it less beneficial for them to spam.

Asking for money (or postage stamps) with email to combat spam is doomed to fail--the spammers already use technology that avoids such measures. Even if they didn't, implementation doesn't seem likely.

Spam is sent by botnets (armies of compromised computers controlled by criminals). These would adapt and use stamps already bought by users who own the computers. It's an example of evolution teaching criminals how to be better at crime.

Thus, by fighting criminals and forcing them to learn, we make our situation worse. I had the honor of being the first to introduce this argument into modern security discussion, which was later elaborated upon by respected colleague Paul Vixie. Paul introduced the idea that as cybercrime results from financial incentive, so must the solution be economic in nature.

A permanent solution to cybercrime, economic or otherwise, doesn't exist yet; the nature of combating it is mostly reactive.

The criminals have a direct economic incentive to retain their ROI and reach their quarterly goals. Therefore, reactive solutions are quickly defeated, again and again, much like we have seen in terrorism and the drug wars. On the other hand, in fighting cybercrime, knee-jerk reactions are often the only viable option we have. At the very least we can strategize for a desired outcome.

When ISPs started blocking port 25/TCP outgoing (SMTP) and limiting it to their servers alone, spammers changed their tactics. Previously, bots sent email directly to any server in the world. Now, they had to go through the ISP's own mail servers. This caused spammers to develop new bots that used real user email accounts -- and thus the ISP's servers -- to send out spam.

While it wasn't popular at first, I was a proponent of blocking port 25, introducing it and advocating for it whenever and wherever I could. (To my knowledge it was a colleague, Dave Rand, who first introduced the concept).

The strategy had some tradeoffs. Mainly, ISPs had to invest resources upgrading their infrastructure to cope with the extra email. The positive results outweigh the negative, however: service providers can now easily pinpoint who offenders are, and automate the abuse-handling process. Not to mention save bandwidth.

Criminals were forced to evolve in a desirable direction, which is a victory on its own. Evolution in capabilities occurs to circumvent security measures. By limiting the spammers' options they evolved to a technological battleground where we have more control.

In my next blog post, I'll discuss why some spam solutions get implemented and others never get past the drawing board, and the role of user psychology here.

Follow Gadi Evron on Twitter: http://twitter.com/gadievron

Gadi Evron is an independent security strategist based in Israel. Special to Dark Reading. Gadi is CEO and founder of Cymmetria, a cyber deception startup and chairman of the Israeli CERT. Previously, he was vice president of cybersecurity strategy for Kaspersky Lab and led PwC's Cyber Security Center of Excellence, located in Israel. He is widely recognized for ... View Full Bio

 

Recommended Reading:

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
COVID-19: Latest Security News & Commentary
Dark Reading Staff 7/9/2020
4 Security Tips as the July 15 Tax-Day Extension Draws Near
Shane Buckley, President & Chief Operating Officer, Gigamon,  7/10/2020
Russian Cyber Gang 'Cosmic Lynx' Focuses on Email Fraud
Kelly Sheridan, Staff Editor, Dark Reading,  7/7/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Special Report: Computing's New Normal, a Dark Reading Perspective
This special report examines how IT security organizations have adapted to the "new normal" of computing and what the long-term effects will be. Read it and get a unique set of perspectives on issues ranging from new threats & vulnerabilities as a result of remote working to how enterprise security strategy will be affected long term.
Flash Poll
The Threat from the Internetand What Your Organization Can Do About It
The Threat from the Internetand What Your Organization Can Do About It
This report describes some of the latest attacks and threats emanating from the Internet, as well as advice and tips on how your organization can mitigate those threats before they affect your business. Download it today!
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-15105
PUBLISHED: 2020-07-10
Django Two-Factor Authentication before 1.12, stores the user's password in clear text in the user session (base64-encoded). The password is stored in the session when the user submits their username and password, and is removed once they complete authentication by entering a two-factor authenticati...
CVE-2020-11061
PUBLISHED: 2020-07-10
In Bareos Director less than or equal to 16.2.10, 17.2.9, 18.2.8, and 19.2.7, a heap overflow allows a malicious client to corrupt the director's memory via oversized digest strings sent during initialization of a verify job. Disabling verify jobs mitigates the problem. This issue is also patched in...
CVE-2020-4042
PUBLISHED: 2020-07-10
Bareos before version 19.2.8 and earlier allows a malicious client to communicate with the director without knowledge of the shared secret if the director allows client initiated connection and connects to the client itself. The malicious client can replay the Bareos director's cram-md5 challenge to...
CVE-2020-11081
PUBLISHED: 2020-07-10
osquery before version 4.4.0 enables a priviledge escalation vulnerability. If a Window system is configured with a PATH that contains a user-writable directory then a local user may write a zlib1.dll DLL, which osquery will attempt to load. Since osquery runs with elevated privileges this enables l...
CVE-2020-6114
PUBLISHED: 2020-07-10
An exploitable SQL injection vulnerability exists in the Admin Reports functionality of Glacies IceHRM v26.6.0.OS (Commit bb274de1751ffb9d09482fd2538f9950a94c510a) . A specially crafted HTTP request can cause SQL injection. An attacker can make an authenticated HTTP request to trigger this vulnerabi...