david.dittrich's blog

Thoughts on the Active Cyber Defense Certainty Act 2.0

On May 25, 2017, Representative Tom Graves released the second draft of proposed amendments to 18 U.S.C. 1030 (known as the Computer Fraud and Abuse Act). Representative Graves’ bill is known as the Active Cyber Defense Certainty Act (or ACDC Act). There is no universally accepted umbrella term for this, but it is variously called “Active Defense”, “Active Cyber Defense”, “hacking back,” “hackback”, and “strike back.” You will find the word “active” applied almost universally in these discussions, though it frequently results in establishing a simple (though false) dichotomy of “passive defense” vs. “active defense” and frequently leading to fallacious “straw man” arguments. I prefer the term “Active Response Continuum” to explicitly avoid setting up such binary choices. [Dittrich and Himma(2005)]
Without technical knowledge and a clear contextual understanding of the criminal actions, potentially triggering legal defensive response, two paradoxes emerge. First, the “attributional technology” cited in the draft ACDC Act may not achieve its desired goals. Second, some actions disallowed by the ACDC Act include previously witnessed “strike back” actions that have motivated calls for the kind of amendments embodied in the ACDC Act. [Robinson(2017)]
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Response to "How Microsoft Appointed Itself Sheriff of the Internet" (Part 2)

In the first part of this two part blog post, the issue of anticipating retaliation during an aggressive battle to wrest control of a DDoS botnet was examined. In this part, the issues of dual standards, taking responsibility, and learning lessons to make positive change over time are examined.
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Response to "How Microsoft Appointed Itself Sheriff of the Internet" (Part 1)

This blog post is the first of a two-part series in response to the Wired article of Oct 14, 2014, "How Microsoft Appointed Itself Sheriff of the Internet." [McM14] I find some problems with this article that raise questions about the depth of research into some elements of the story, and an appearance of bias in how "unintended consequences" are presented.

[McM14] Robert McMillan. How Microsoft Appointed Itself Sheriff of the Internet. http://www.wired.com/2014/10/microsoft-pinkerton/, October 2014.

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Hide and go seek, not hide and go tweak

On July 31, 2013, Jason Geffner of CrowdStrike discussed a new tool called "Tortilla" that allows incident responders and computer security researchers to hide behind the Tor network as they poke and prod malicious software infrastructure. Were I there, I would have asked Jason this question: What things should I not do while using Tortilla, and why shouldn't I do them? I know Jason and respect his technical skills, but if he and CrowdStrike don't have a good answer, that will say a lot about our field's collective ability to reason about actions along the Active Response Continuum. [D. Dittrich and K. E. Himma. Active Response to Computer Intrusions. Chapter 182 in Vol. III, Handbook of Information Security, 2005. http://ssrn.com/abstract=790585.] Read more »

Debating the Active Response Continuum: Defining the Terms of the Debate

[This post expresses the personal opinion of the author and is not an official statement representing the Honeynet Project.]

At the AusCERT 2013 conference, Dmitri Alperovich called for debate about, "the kinds of actions that infosec professionals are allowed to take against attackers." I agree with Dmitri, and in fact I made the same call, at the same conference on May 23, 2005! (AusCERT invited me to speak on an emerging topic and I chose to speak for the first time publicly at AusCERT 2005 about the Active Response Continuum research I had been doing with funding from Cisco.) As one of the world's foremost experts on this topic, with over two decades of security operations experience, I welcome Dmitri to the debate. :)

What follows is adapted from the forthcoming book, "The Active Response Continuum: Ethical and Legal Issues
of Aggressive Computer Network Defense," by David Dittrich. I welcome any comments, suggested modifications and/or additions.

There are many challenges facing those who are victimized by computer crimes, who are frustrated with what they perceive to be a lack of effective law enforcement action to protect them, and who want to unilaterally take some aggressive action to directly counter the threats to their information and information systems. This has been called active defense, aggressive [network] self-defense, counter-attack, and even hacking back. Regardless of the reasons why someone would want to take such actions, it is necessary to discuss the options, acknowledge the risk and benefit tradeoffs, and identify how aggressive actions can be taken in a manner that is safe, controlled, and justifiable (as best this can be accomplished). This cannot be accomplished, however, if everyone comes at the subject with their own individual frame of reference and language. (This was pointed out by more than one person at this year's Suits & Spooks DC 2013 conference.) Read more »

A new infosec era? Or a new infosec error?

On March 4, 2013, a contest was held at the Nullcon conference in Goa, India, to see who could take over a botnet. The Times of India reported that the prize money was provided by an Indian government official and was awarded to the Garage4Hackers team. The co-founder of the Nullcon conference, Antriksh Shah, said "At Nullcon Goa 2013, for the first time in the world the government has come forward and announced a bounty prize of Rs 35,000 to whoever provides critical information on the command and control servers of a malware recently found in one of the government installations in India," and then tweeted, "Dawn of new infosec era. Govt of India announced (and actually paid) first ever bounty (Rs. 35 k) at nullcon to take down a c&c." When asked whether this was a live botnet, or a simulated botnet held within a safe and isolated virtual network where no harm could result, Nullcon tweeted, "it was a live campaign up since a couple of yrs and the malware was found in a gov. Infra." Read more »

The Ethics of Social Honeypots

For the last few years, I have been participating in a Department of Homeland Security sponsored effort to develop principles and applications for the evaluation of information and communication technology (ICT) research. If you are not familiar with the Menlo Report, you can find a description in Michael Bailey, David Dittrich, Erin Kenneally, and Douglas Maughan. The Menlo Report. Security & Privacy, IEEE, 10(2):71–75, March/April 2012.

I and two of my Menlo colleagues -- Wendy Vischer and Erin Kenneally -- recently taught a didactic course at the PRIM&R Advancing Ethical Research conference in San Diego. (PRIM&R is the conference for Institutional Review Board, or IRB, professionals, with the annual AER conference having thousands of attendees). Our course primarily described the Menlo Report process to date, but we concluded with a mock IRB committee review of a fictional proposed research project in which researchers develop countermeasures to malicious botnets in social network platforms like Facebook using a combination of deception to build a social network of over 1 million users and to then use "good bots" that infiltrate the "bad bots". Read more »

No, Executing Offensive Actions Against Our Adversaries Really Does Have High Risk (Deal With It)

This is a response to a CSO Online blog post by Jeff Bardin ("Caution: Not Executing Offensive Actions Against Our Adversaries is High Risk," November 2012.), which is a rebuttal to a blog post by Jody Westby on Forbes online (“Caution: Active Response to Cyber Attacks Has High Risk.”) Mr. Bardin is obviously playing on words in the title and I seriously doubt he believes that it is higher risk to not take aggressive actions than is to do so. His post does not contain a reasoned proposal for how to change or work within existing legal and ethical norms to allow aggressive actions directed at computer network attackers. It is instead a strident endorsement of a vaguely defined "new approach" of counter-attack using simplistic arguments based on emotion and a desire for retribution (an unethical position to take), lacking sufficient discussion of appropriate "rules of engagement," principle-based ethical justifications of any type beyond basic "right of self-defense" arguments, and including no oversight mechanisms to minimize the potential for abuse or collateral damage. This response is quite long, including not only Mr. Bardin's own words for context but also many references to materials apropos to the topic that Mr. Bardin does not provide in his post.

Mr. Bardin's blog post illustrates some of the problems with discussion of this topic that I have seen over and over since the first workshops I attended or lead on this topic in Seattle's Agora security group from 2001 to 2004. I have been studying and discussing these issues for over a decade and have seen the same simplistic arguments repeated in nearly every discussion. Useful analogies in this realm are really hard to find and almost always fail. Part of the problem stems from non-technical people trying to discuss extremely technical and complex issues of computer network attack and defense, combined with rushing to simple "self defense" analogies and appeals to emotion, suggesting we have to do something, anything, to get satisfaction. Frequently left out is any meaningful discussion of ethics, "rules of engagement," responsibility, or accountability.

If my response here comes across as vehement opposition, it is not intended that way. If anything, it shares Mr. Bardin's frustration that we have gotten to the point where intrusions are so widespread and pervasive, but we differ in explaining why and in proposing a viable path forward. Read more »

FAQ on Kelihos.B/Hlux.B sinkholing

On March 31, 2012, the Honeynet Project published a draft Code of Conduct and a statement about Ethics in Computer Security Research: Kelihos.B/Hlux.B botnet takedown.

The initial draft of the Code of Conduct was drawn from concepts described in the The Menlo Report: Ethical Principles Guiding Information and Communication Technology Research that was published in the United States Federal Register on December 28, 2011 for public comment. The Code of Conduct was refined through discussion within the Legal and Ethics Committee and volunteer Honeynet Project members to help make it workable within the structure of the Honeynet Project membership for evaluating the ethics of future research activities.

The following FAQ reflects how the Menlo Report principles and proposed Honeynet Project Code of Conduct can be used to analyze and explain an action like the Kelihos/Hlux sinkholing operation. Read more »

Thoughts on the Microsoft's "Operation b71" (Zeus botnet civil legal action)

On Sunday, March 25, Microsoft announced that for the fourth time, they had gone to a federal court and successfully obtained an ex parte temporary restraining order (TRO) to seize domain names from botnet operators. For the second time, the court has also ordered U.S. Marshals to accompany Microsoft and others to serve search warrants and seize evidence that can be used in future civil or criminal actions. Read more »

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