Developer Jean-Pierre Lesueur said on his DarkComet website that he decided to pull the plug after his software was used for illegal purposes, for which he didn't want to be held accountable. Lesueur, meanwhile, has also released--via the website--a free tool to detect any instance of DarkComet running on a computer, "even packed/compressed/virtualized etc.," as well as another tool "to extract the data in a darkcomet stub," he said.
"Why did I take such a decision? ... Because of the misuse of the tool, and unlike so many of you [I] seem to believe I can be held responsible [for] your actions, and if there is something I will not tolerate [it] is to have to pay the consequences for your mistakes and I will not cover for you," wrote Lesueur on his website. "The law is how it is and I must abide by the rules, yes it's unfortunate for [developers] in security but that's how it is. Without mentioning what happened in Syria ..."
What happened in Syria was this: Syrian police used DarkComet earlier this year to spy on opponents of President Bashar al-Assad. Likewise, DarkComet reportedly has been used to spy on pro-Tibet non-governmental organizations.
Remote access tools have been available for some time, and used in numerous "low and slow" nation state attacks, as well as in advanced persistent threat attacks. But awareness of such tools increased markedly last year, after revelations that the Shady RAT series of attacks--attributed by many information security watchers to China--had successfully compromised at least 72 organizations, including 22 governmental agencies and contractors.
What can DarkComet or other RATs do? "This software allow you to make hundreds of functions [stealthily] and remotely without any kind of [authorization] in the remote process," Lesueur told security firm Sophos last year, in reference to DarkCometX, a then-in-development Mac version of his RAT.
Given that functionality, Chester Wisniewski, a senior security advisor at Sophos Canada, said the "RAT" term was a misnomer. "While the authors would like you to believe they are simply tools, I think the evidence suggests Trojan is more appropriate," he said.
DarkComet creator Lesueur has been careful to distinguish between how his software could be used legitimately or illegally. On his website, in response to a rhetorical question about whether just the act of using DarkComet would be illegal, he said: "Well it depends how you use it, if you use it to control remote machines without any authorization from the owner then yes, if you use it in your own network then it is fully legal."
Lesueur's retiring of DarkComet clearly is his attempt to avoid arrest or imprisonment for having built and distributed the free software. "While in the past authors of such tools believed that they were immune from prosecution by claiming that they were educational tools, arrests--starting with the alleged author of the infamous Mariposa botnet--have begun to wake up authors of such tools to the possibility that they could be breaking the law," according to a Symantec blog post.
"These arrests are sending a message to the authors of such tools that they are not above the law and could face prosecution for their actions," according to Symantec, which predicts that more developers of freeware RATs--and similar tools--will soon retire their wares. "Time will tell, but any similar closures due to the risk of prosecution must be seen as a step in the right direction in combating the risk posed by such freely available tools," the company said.
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