Share this article on:
Researchers at Proofpoint have identified a new phishing campaign targeting healthcare providers, insurance firms and pharmaceutical companies. The intercepted emails impersonate Vanderbilt University Medical Center and claim to include the results of a recent HIV test.
The emails have the subject line “Test result of medical analysis” and include an Excel spreadsheet attachment – named TestResult.xlsb – which the recipient must open to view the HIV test results. When the spreadsheet is opened, the user is advised the data is protected. To view the test result it is necessary to enable content. If content is enabled and macros are allowed to run, malware will be downloaded onto the user’s computer.
This is a relatively small-scale campaign being used to distribute the Koadic RAT, a program used by network defenders and pen testers to take control of a system. According to Proofpoint, Koadic is popular with nation state-backed hacking groups in Russia, China, and Iran. Koadic allows attackers to take control of a computer, install and run programs, and steal sensitive personal and financial data.
Proofpoint has also intercepted several Coronavirus-themed phishing emails in the past few weeks that are being used to distribute a range of malware variants including the Emotet Trojan, AZORult information stealer, the AgentTesla keylogger, and the NanoCore RAT. Several campaigns have been identified that use fake DocuSign, Office 365, and Adobe websites for harvesting credentials.
Several coronavirus-themed phishing lures have been identified. Many claim to offer further information about local COVID-19 cases or claim to include important information to prevent infection. One campaign claimed there was a vaccine and a cure for COVID-19 and it was being withheld by the government. Some of the phishing emails are extremely well written and are highly convincing and impersonate authorities on COVID-19 such as the World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC).
Researchers at Checkpoint have been tracking coronavirus-themed domains and report more than 4,000 new coronavirus-themed domains have been registered since January 2020. 5% of those domains are suspicious and 3% have been confirmed as malicious and are being used in phishing campaigns or for malware distribution.
“Threat actors regularly use purported health information in their phishing lures because it evokes an emotional response that is particularly effective in tricking potential victims to open malicious attachments or click malicious links, explained Proofpoint. “If you receive an email that claims to have sensitive health-related information, don’t open the attachments. Instead, visit your medical provider’s patient portal directly, call your doctor, or make an appointment to directly confirm any medical diagnosis or test results.”