Security Market Segment LS
Tuesday, 19 October 2021 11:08

Trend Micro duo find Linux malware targeting Huawei Cloud

Trend Micro duo find Linux malware targeting Huawei Cloud Image by OpenClipart-Vectors from Pixabay

A vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware is one route through which Linux malware, observed by researchers at Trend Micro to be attacking Huawei Cloud, a relatively new cloud service provider, gain access to systems.

A blog post by researchers Alfredo Oliveira and David Fiser said the other methods whereby the malware gained access were through the abuse of weak passwords for SSH, Redis, PostgreSQL, SQLServer, MongoDB and FTP clients.

The payload planted by the malware was a cryptominer. The attackers removed applications and services in Huawei Cloud, disabling the hostguard service.

The two researchers said the attackers used an open-source plugin known as cloudResetPwdUpdateAgent that normally allowed users to reset a password for the Elastic Cloud Service running on Huawei Cloud.

Oliveira and Fiser said older samples of the same malware had been detailed by the Chinese company Tencent in 2020, though in that case container environments were targeted.

"Another interesting capability that we haven’t seen before is that in this campaign, malicious actors have been searching for specific public keys that would allow them to kill off their competition from the infected system and update their own keys," the pair wrote.

"More than any other samples and campaigns we’ve seen so far, this campaign performs a comprehensive sanitisation of the operation system.

"It looks for both signs of previous infections and for security tools that could stop its malicious routines. Not only that, but it also uses simple but effective commands to clean up after it performs its infection routine."

They found that the attackers seemed to be very familiar with the people running the systems they were attacking.

One more interesting feature of the malware was that it installed The Onion Router (Tor) proxy service, which would be used later to anonymise the malware's malicious connections.

"Cloud service misconfigurations can allow cryptocurrency mining and cryptojacking attacks to happen," Oliveira and Fiser said.

"Most of the attacks that we’ve monitored occurred because the services running on the cloud had an API or an SSH with weak credentials or had very permissive configurations, which attackers can abuse to enable them to infiltrate a system without needing to exploit any vulnerabilities.

"Misconfigurations are a common point of entry in such scenarios, and cloud users should give the same thought and attention to misconfigurations as they do to vulnerabilities and malware."

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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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