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HC3: Sector Alert: Social Engineering Attacks Targeting IT Help Desks in the Health Sector

Posted on April 6, 2024 by Dissent

April 3, 2024
TLP:CLEAR
Report: 202404031000

Executive Summary

HC3 has recently observed threat actors employing advanced social engineering tactics to target IT help desks in the health sector and gain initial access to target organizations. In general, threat actors continue
to evolve their tactics, techniques, and procedures (TTPs) to achieve their goals. HC3 recommends various mitigations outlined in this alert, which involve user awareness training, as well as policies and procedures for increased security for identity verification with help desk requests.

Report

Social engineering is being used across the Healthcare and Public Health (HPH) sector to gain unauthorized access to systems. Threat actors are employing sophisticated social engineering techniques to target an organization’s IT help desk with phone calls from an area code local to the target organization, claiming to be an employee in a financial role (specifically in revenue cycle or administrator roles). The threat actor is able to provide the required sensitive information for identity verification, including the last four digits of the target employee’s social security number (SSN) and corporate ID number, along with other demographic details. These details were likely obtained from professional networking sites and other publicly available information sources, such as previous data breaches. The threat actor claimed that their phone was broken, and therefore could not log in or receive MFA tokens. The threat actor then successfully convinced the IT help desk to enroll a new device in multi-factor authentication (MFA) to gain access to corporate resources.

After gaining access, the threat actor specifically targeted login information related to payer websites, where they then submitted a form to make ACH changes for payer accounts. Once access has been gained to employee email accounts, they sent instructions to payment processors to divert legitimate payments to attacker-controlled U.S. bank accounts. The funds were then transferred to overseas accounts. During the malicious campaign, the threat actor also registered a domain with a single letter variation of the target organization and created an account impersonating the target organization’s Chief Financial Officer (CFO).

Read the full report at https://www.hhs.gov/sites/default/files/help-desk-social-engineering-sector-alert-tlpclear.pdf  or below:

help-desk-social-engineering-sector-alert-tlpclear

 

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