Security News
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A VoIP provider was at the heart of billions of robocalls made over the past five years that broke a slew of US regulations, from enabling telemarketing scams to calling numbers on the National Do Not Call Registry, it is claimed. Los-Angeles-based XCast Labs allowed robocalls from telemarketers to flow through its voice-over-IP network to folks despite multiple warnings over several years that many of the calls ran afoul of the America's Telemarketing Sales Rule, the FTC alleged in a 13-page complaint [PDF] filed May 12 in a California federal court.
As with all technology upon which businesses depend, there are security risks related to VOIP which companies must be aware of in order to protect their operations, employees and data. Keep track of all in-house or external systems that VOIP relies on as well as end user devices and the software involved.
The operators behind the Lornenz ransomware operation have been observed exploiting a now-patched critical security flaw in Mitel MiVoice Connect to obtain a foothold into target environments for follow-on malicious activities. Lorenz, like many other ransomware groups, is known for double extortion by exfiltrating data prior to encrypting systems, with the actor targeting small and medium businesses located in the U.S., and to a lesser extent in China and Mexico, since at least February 2021.
The Lorenz ransomware gang is exploiting a vulnerability in Mitel VoIP appliances to break corporate networks. Threat hunters with cybersecurity firm Arctic Wolf Labs recently found that Lorenz - a prolific group that has been around since at least early 2021 and lately is primarily targeting SMBs in the US, China, and Mexico - used a vulnerability in a MiVoice VoIP appliance from Mitel to get into a victim's network before deploying Microsoft's BitLocker Drive Encryption tool to encrypt the data.
Threat analysts have uncovered a large-scale campaign targeting Elastix VoIP telephony servers with more than 500,000 malware samples over a period of three months. Security researchers at Palo Alto Networks' Unit 42 say that the attackers' goal was to plant a PHP web shell that could run arbitrary commands on the compromised communications server.
Threat analysts have uncovered a large-scale campaign targeting Elastix VoIP telephony servers with more than 500,000 malware samples over a period of three months. Security researchers at Palo Alto Networks' Unit 42 say that the attackers' goal was to plant a PHP web shell that could run arbitrary commands on the compromised communications server.
VoIP phones using Digium's software have been targeted to drop a web shell on their servers as part of an attack campaign designed to exfiltrate data by downloading and executing additional payloads. "The malware installs multilayer obfuscated PHP backdoors to the web server's file system, downloads new payloads for execution, and schedules recurring tasks to re-infect the host system," Palo Alto Networks Unit 42 said in a Friday report.