Nation-State Attackers May Have Co-opted Vega Ransomware

The tactics used by the latest version of the Vega cryptolocker program indicates the code may have been stolen from its authors and is now being used for destructive attacks, a new report suggests.

Significant changes in the tactics of a new variant of the Vega ransomware may indicate that the code for the software is now in the hands of a nation-state actors, security firm BlackBerry Cylance stated on December 9.
The new ransomware variant, dubbed Zeppelin by BlackBerry Cylance, started spreading in early November and avoids infecting systems in Russia, Ukraine, Belorussia, and Kazakhstan, instead focusing on US and European technology and healthcare companies, according to the companys researchers. While the malware framework is modular and can easily be configured for different tasks, Zeppelin focuses on destructive attacks, says Josh Lemos, vice president of research and intelligence at BlackBerry Cylance. (Lemos is not related to this reporter.)
Our speculation is that it is a state actor using the generalized codebase used in Buran, Vega, and prior campaigns, as a way to somewhat obfuscate their intentions, especially given that its targeting is so narrow, he says, adding: We believe that they had access to source and have modified the code materially.
Ransomware continues to be a popular attack for cybercriminals. Where attackers once focused the malware on consumers, businesses are now the preferred targets of attack, because a single compromise can net tens of thousands of dollars for the attackers. In 2019, the overall number of ransomware attacks have declined, but attacks are increasingly targeted, according to
an October report covering the first nine months of the year
.
Yet apart from North Korean attempts to generate cash from ransomware, most nation-state attackers have used the main ransoming tactic of encrypting data to prevent access as a way to disrupt the operations of rival nations government agencies and companies. The change in the goals of the latest Vega variant suggest that a nation-state has gained access to the code, BlackBerry Cylance stated in its analysis.
The major shift in targeting from Russian-speaking to Western countries, as well as differences in victim selection and malware deployment methods, suggest that this new variant of Vega ransomware ended up in the hands of different threat actors — either used by them as a service, or redeveloped from bought (or) stolen (or) leaked sources, according to the analysis.
While the latest variant is more modular, the primary reason that the companys researchers attribute the latest malware to a nation-state is the change in targeting and the focus on destructive, rather than commercial, goals. The malware does leave a ransom demand behind but, unlike most malware, does not specify an amount or a bitcoin wallet to be paid.
This seems intentionally there to disrupt or cause commercial harm to the targets, rather than yield a bunch of cash, and that is not really the M.O. of your run-of-the-mill cybercriminals, Lemos says. Given this skill set and care that was taken in the campaign, my personal assessment is that they probably have the skill to go out and steal it from whoever they want to.
To date, the company has collected five samples of the hard-to-find malware. The attack likely affects tens, not hundreds of companies, he says.
Tactics-wise, the ransomware program does not break any new ground.
Zeppelin uses a basic method of obfuscating the various keys in the code that could be used to easily identify the software by security scanners that look for recognizable text. In addition, Zeppelin uses code of varying sizes and random APIs to evade detection, as well as delays in execution to foil sandbox analysis by outlasting the time that such analysis software spends waiting for signs of malicious execution.
While BlackBerry Cylance did not attribute the ransomware to any specific nation, because the software avoids executing in Russia, Ukraine, Belorussia, and Kazakhstan by checking the machines default language and IP address, the operators likely reside in one of those nations.
In a stark opposition to the Vega campaign, all Zeppelin binaries — as well as some newer Buran samples — are designed to quit if running on machines that are based in Russia and some other ex-USSR countries, the companys analysis states.
Many questions still remain, Lemos acknowledges. Because the company has collected a handful of samples of the malware, the picture of the groups operations is less clear than BlackBerry Cylance researchers would like, he says.
There is not a lot of information on the TTPs [tactics, techniques and procedures], he says. It is more about what is not there. With it being so modular and highly configurable, the fact that this was just used in this disruptive capacity could mean that it is just a cheap throwaway for them or that this is part of a larger campaign that we are not privy to.
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Nation-State Attackers May Have Co-opted Vega Ransomware