Skip to main content

Doki Linux Malware Infected Docker Servers in the Cloud

 


Linux offers great applications for personal and small business financial management making it a widely used OS, which also means notorious network infiltrators have their prying eyes on it. In one of the longest ongoing attack campaigns, hackers designed new tools and techniques specifically to tamper with Linux infrastructure.

Ngrok mining botnet campaign with Doki malware

In July, Intezer researchers detected an attack that involved a completely undetected Linux malware and a previously undocumented technique, using a blockchain wallet for generating C&C domain names.

  • An active Ngrok mining botnet campaign, active for at least two years, has been targeting exposed Docker servers in AWS, Azure, and other cloud platforms.
  • The campaign is also deploying a fully undetected backdoor named Doki. The multi-threaded Doki malware is different from the standard cryptominers typically deployed in this attack.
  • The campaign has primarily focused on taking control over misconfigured Docker servers and exploited them to set up their own malicious containers with cryptominers running on the victims’ infrastructure.

Malware capabilities

Doki malware has managed to stay undetected for over six months from any of the 60 malware detection engines in VirusTotal, in spite of first being observed on January 14, 2020.

  • The malware uses a scanning tool, such as zmap, zgrap, and jq, to scan the network for ports associated with Redis, Docker, SSH, and HTTP in compromised systems.
  • To dynamically generate its C2 domain in real-time, Doki uses the DynDNS service and a unique Domain Generation Algorithm (DGA) based on the Dogecoin cryptocurrency blockchain.

Recent attacks on Ngrok server

This year in February, scammers were seen using a local web-server exposed to the Internet via the free Ngrok service to collect the stolen data but pretended to be CDNs to hide their tracks.

Closing lines

The bottom line is that cybercriminals are continuously evolving their techniques to evade detection and propagate their attack campaigns through innovative command and control channels. The malicious use of blockchain technlogy in the Doki malware is yet another technique of this kind that make its hard for security teams to detect it. With relevant analysis and intel insights, security teams can devise innnoative methods to thwart such threats.

Originally published at https://cyware.com.

Comments

Post a Comment

Popular posts from this blog

Babuk ransomware is back, uses new version on corporate networks

  After announcing their exit from the ransomware business in favor of data theft extortion, the Babuk gang appears to have slipped back into their old habit of encrypting corporate networks. The criminals are currently using a new version of their file-encrypting malware and have moved the operation to a new leak site that lists a handful of victims. Gang’s still in the game The Babuk ransomware group became known at the beginning of the year but the gang says that their attacks had started in mid-October 2020, targeting companies across the world and demanding ransoms typically between $60,000 and $85,000 in bitcoin cryptocurrency. In some cases, victims were asked hundreds of thousands for data decryption. One of their most publicized victims is the Washinton DC’s Metropolitan Police Department (MPD). This attack likely pushed the threat actor into announcing its retirement from the ransomware business only to adopt another extortion model that did not include encryption....
Post a Comment
Read more

Ransomware's Dangerous New Trick Is Double-Encrypting Your Data

  Ransomware groups have always taken a more-is-more approach . If a victim pays a ransom and then goes back to business as usual-hit them again. Or don’t just encrypt a target’s systems; steal their data first, so you can threaten to leak it if they don’t pay up. The latest escalation? Ransomware hackers who encrypt a victim’s data twice at the same time. Double-encryption attacks have happened before, usually stemming from two separate ransomware gangs compromising the same victim at the same time. But antivirus company Emsisoft says it is aware of dozens of incidents in which the same actor or group intentionally layers two types of ransomware on top of each other. “The groups are constantly trying to work out which strategies are best , which net them the most money for the least amount of effort,” says Emsisoft threat analyst Brett Callow. “So in this approach you have a single actor deploying two types of ransomware. The victim decrypts their data and discovers it’s not act...
Post a Comment
Read more

Linux For Apple M1 Macs is Finally Here, Thanks To Corellium

  Just when we thought that Desktop/Notebooks on ARM chipsets doesn’t make any sense, Apple came up with a revolutionary chipset M1 and showed the world what it’s capable of. Unlike other Mac counterparts with Intel CPUs, M1 lacked the ability to run Linux, until yesterday. Thanks to Corellium, running Linux for M1 Macs is now possible. The company known for winning a lawsuit against Apple has finally created its own Linux OS for M1 Macs. This certainly opens doors for other Linux communities to do the same. Corellium’s Linux For M1 Macs Is In Early Beta Stages Creator of Linux, Linus Torvalds, wanted M1 Macbook Air to run Linux , and it’s finally a reality. Corellium’s CTO, Chris Wade, tweeted yesterday that Corellium’s Linux OS is available and is in very early beta stages. Adding to that, he also warned users to go ahead with the installation only if they know what they’re doing. More details about the “full release with USB” were supposed to be revealed today, but there’s ...
Post a Comment
Read more