Security Market Segment LS
Friday, 20 September 2019 06:50

New group using Windows malware to attack Saudi targets: claim

New group using Windows malware to attack Saudi targets: claim Image by John R Perry from Pixabay

A hitherto unknown group that has been dubbed Tortoiseshell is using both customised and common Windows malware to target IT providers in Saudi Arabia, the American security firm Symantec claims, adding that these attacks appear to be focused on the supply chain and ultimately aimed at the providers' customers.

The company said in a blog post that the group had been active at least since July 2018 and that it had identified 11 organisations which had come under attack.

Symantec's blog post comes a few days after Saudi Arabian oil installations came under attack, allegedly by Iranian missiles.

Though no attribution was made regarding Tortoiseshell, Symantec mentioned that tools associated with APT34 [aka OilRig or Crambus], an actor that has been associated with Iran, had been used by Tortoiseshell.

In two of the affected organisations, Symantec said there were indications that the attackers had gained domain admin-level access.

The custom tool used was malware known as Backdoor.Syskit, a backdoor that had been developed using Delphi and .NET. Apart from this, common attack tools like two versions of Infostealer and get-logon-history.ps1 were also used by Tortoiseshell, Symantec claimed.

"The initial infection vector used by Tortoiseshell to get onto infected machines has not been confirmed, but it is possible that, in one instance, a Web server was compromised to gain access by the attacker," the Symantec post said.

"For at least one victim, the first indication of malware on their network was a Web shell. This indicates that the attackers likely compromised a Web server, and then used this to deploy malware onto the network."

The post said IT providers were a profitable source when it came to attacks, as they often had high-level access to clients' computers. This meant that the networks of the clients were open to infiltration without having to be compromised.

In June, Symantec claimed that a well-known attack group known as Turla, Snake or Waterbug appeared to have hijacked and used the infrastructure of APT34.

And in March, Symantec posted details about a group it called Elfin or APT33 which it said had been attacking organisations in the US and Saudi Arabia.

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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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