An earlier version of this post originally appeared at ICANN blog on 15 Sep 2015.
Nearly every day, we see news stories or tweets that reveal another "cyber attack" against a well-known brand, bank or government agency are commonplace today. These are almost always characterized as sophisticated hacking schemes. Some are described as acts of hacktivism. In an effort to characterize certain attacks as the most sophisticated ever, one enthusiastic Wikipedia contributor uses the phrase advanced targeted computer hacking attack. However, the reality is that a cyber attack doesn't necessarily involve hacking, and a great many hacks have nothing to do with attacks.
What is a Hack?
The term "hack" was originally intended to describe a cleverly written or "coded" piece of software. Often, these kinds of software solved an immediate and thorny problem quickly and efficiently. For example, in the early days of computing, memory was a precious resource, so the developer of a piece of software that made remarkably efficient use of memory might have been complimented as having hacked a great bit of software, and he may have been acknowledged as a terrific hacker. The "hacker" label was a sign of respect. Unfortunately, hacking is now more often associated with cyber attacks, cyber espionage or online criminal activity.
What is a (cyber) attack?
The simplest definition is that a cyber attack is an criminal act, or an act of espionage, terrorism, hacktivism or war that is conducted wholly or partly in cyberspace.
Are all cyber attacks conducted by hackers?
No. Invariably, news and social media channels characterize or glamorize attackers as talented individuals who write very sophisticated software. These characterizations are generally wrong in several respects; while there may be some talented individuals who write crime or attack software, much of what is used as attack software is often not very sophisticated but just clever enough to exploit a vulnerability. Very often, components of the attack software's "package" are not even the attacker's original work. In fact, it's increasingly common that individuals who launch attacks simply buy attack packages in underground marketplaces or download them from public repositories.
Do all cyber attacks involve hacking?
No. Let's use password attacks to illustrate. An attacker who uses social engineering to convince a helpdesk operator to disclose the user name and password for an account does not use a software hack. Such attacks, including some high profile Twitter account and DNS hijacking attacks, don't rely on hacking. Compare this to an attack where an attacker scans a network, installs exploit software on a vulnerable computer and uses that computer to gain access to a sensitive database. Here, hacking – the use of specially crafted software – is a critical component of the attack.
Does the distinction really matter?
Yes. Accurately characterizing a cyber attack may be helpful to your organization's incident response team or law enforcement. For example, if the attack was the result of an attacker applying social engineering to a helpdesk staffer, inspecting call or chat logs is more important than inspecting computers for unauthorized (exploit) software.
It never hurts to get the language right.