Cybersecurity platform CrowdStrike reported a supply chain attack that involved the use of a trojanized installer for the Comm100 Live Chat application to distribute a JavaScript backdoor. The application suffered an attack from 27 September to 29, 2022.
Additionally, the malicious group actively attacked other sectors of the organizations with the same installer including the industrial, technology, healthcare, manufacturing, telecommunications sectors, and insurance in North America and Europe.
Canadian application Comm100 facilitates over 200,000 businesses with its customer service and communication products. With more than 15,000 clients, the Comm100 company offers chat and customer engagement applications to businesses in 51 countries. However, the company did not report anything on how many customers got affected by the attack.
According to the Cybersecurity firm CrowdStrike, the malware was proliferated using a Comm100 installer that was downloadable from the company’s website. On September 26, the installer was signed with legitimate information on the Comm100 desktop agent app.
“CrowdStrike Intelligence can confirm that the Microsoft Windows 7+ desktop agent hosted at hxxps[:]//dash11.comm100[.]io/livechat/electron/10000/Comm100LiveChat-Setup-win[.]exe that was available until the morning of September 29 was a trojanized installer.”, Crowdstrike confirmed.
Also, a malicious loader DLL called MidlrtMd[.]dll has been used as part of the post-exploitation action. It starts an in-memory shellcode to inject an embedded payload into a new Notepad process (notepad[.]exe).
The CrowdStrike believed that the China nexus threat actor is behind the attack because the group previously targeted several Asian online gambling organizations.
“Furthermore, CrowdStrike Intelligence assesses with moderate confidence that this actor likely has a China nexus. This assessment is based on the presence of Chinese-language comments in the malware, the aforementioned tactics, techniques, and procedures (TTPs), and the connection to the targeting of online gambling entities in East and Southeast Asia — a previously established area of focus for China-nexus targeted intrusion actors”, CrowdStrike Intelligence customers reported.
