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Tuesday, 13 March 2018 08:56

Hacking Team's spying tool has resurfaced, says ESET

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Samples of Remote Control System, the surveillance tool sold by the Italian outfit Hacking Team until it was hacked in 2015, have surfaced and been noticed in 14 countries, the Slovakian security firm ESET claims.

RCS was the main tool sold by Hacking Team, which was founded in 2003. It enabled the extraction of files from a targeted device, interception of emails and instant messaging, and also remote activation of the webcam and microphone on a device.

The company suffered a data breach in July 2015 and the use of RCS by repressive regimes around the world was confirmed.

Hacking Team was forced to ask its customers to suspend the use of RCS after about 400GB of its data was leaked.

ESET researcher Filip Kafka said in a blog post that the first indications of RCS being used again came six months after the hack, with reports of a sample of the Mac software being spotted.

In July 2016, a Cyprus-based company named Tablem bought 20% of Hacking Team's shares. Kafka cited reports that claim Tablem has ties to Saudi Arabia.

He said that input from Canada's Citizen Lab had helped ESET find other instances of RCS being used in the wild, all with slight modifications compared to the version which was being used before the breach.

An indicator that these versions were variants of the original RCS was the certificate used to sign them. "We found six different certificates issued in succession. Four of the certificates were issued by Thawte to four different companies, and two are personal certificates issued to Valeriano Bedeschi (Hacking Team co-founder) and someone named Raffaele Carnacina," Kafka wrote.

Another feature common with the pre-hack RCS was the use of VMProtect to make samples less easily detectable. A third common feature between the RCS of old and the samples found in wild was the versioning.

"The versioning (which we accessed after overcoming VMProtect protection) observed in the analysed samples continues where Hacking Team left off before the breach, and follows the same patterns," Kafka said.

"Hacking Team’s habit of compiling their payloads — named Scout and Soldier — consecutively, and often on the same day, can also be seen across the newer samples."

He said that further the post-breach updates of RCS following Hacking Team's coding style and were often found in places that reflected familiarity with the code.

One difference noticed between the pre-leak and post-leak versions of RCS was the size of the start-up file. "Before the leak, the copied file was padded to occupy 4MB. In the post-leak samples, this file copy operation is padded to 6MB – most likely as a primitive detection evasion technique," Kafka wrote.

He said the level of functionality in the post-leak RCS was the same as in the pre-leak version.

"As for the distribution vector of the post-leak samples we analysed, at least in two cases, we detected the spyware in an executable file disguised as a PDF document (using multiple file extensions) attached to a spearphishing email. The names of the attached files contain strings likely aimed to reduce suspicion when received by diplomats."

Kafka said ESET was not naming the countries where the port-leak version of RCS had been found "to prevent potentially incorrect attributions based on these detections, since the geo-location of the detections doesn’t necessarily reveal anything about the origin of the attack".

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Sam Varghese

Sam Varghese has been writing for iTWire since 2006, a year after the site came into existence. For nearly a decade thereafter, he wrote mostly about free and open source software, based on his own use of this genre of software. Since May 2016, he has been writing across many areas of technology. He has been a journalist for nearly 40 years in India (Indian Express and Deccan Herald), the UAE (Khaleej Times) and Australia (Daily Commercial News (now defunct) and The Age). His personal blog is titled Irregular Expression.

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