Broadcom Breach Incident Score: Analysis & Impact (BRO4981349111725)

In this Rankiteo incident briefing, we review the Broadcom breach identified under incident ID BRO4981349111725.

The analysis begins with a detailed overview of Broadcom's information like the linkedin page: https://www.linkedin.com/company/symantec, the number of followers: 589166, the industry type: Semiconductor Manufacturing and the number of employees: 53946 employees

After the initial compromise, the video explains how Rankiteo's incident engine converts technical details into a normalized incident score. The incident score before the incident was 766 and after the incident was 766 with a difference of 0 which is could be a good indicator of the severity and impact of the incident.

In the next step of the video, we will analyze in more details the incident and the impact it had on Broadcom and their customers.

Broadcom Inc. recently reported "Broadcom Middle Eastern Employees' Data Breach via Third-Party Ransomware Attack", a noteworthy cybersecurity incident.

U.S.

The disruption is felt across the environment, and exposing birthdates, email addresses and phone numbers.

In response, and stakeholders are being briefed through public disclosure via The Register; ADP issued a statement clarifying limited impact and no ransom payment.

The case underscores how ongoing (limited details disclosed).

Finally, we try to match the incident with the MITRE ATT&CK framework to see if there is any correlation between the incident and the MITRE ATT&CK framework.

The MITRE ATT&CK framework is a knowledge base of techniques and sub-techniques that are used to describe the tactics and procedures of cyber adversaries. It is a powerful tool for understanding the threat landscape and for developing effective defense strategies.

Rankiteo's analysis has identified several MITRE ATT&CK tactics and techniques associated with this incident, each with varying levels of confidence based on available evidence. Under the Initial Access tactic, the analysis identified Supply Chain Compromise: Third-party Software (T1195.002) with high confidence (95%), supported by evidence indicating third-party compromise (payroll provider partner) via Business Systems House (BSH) and Trusted Relationship (T1199) with high confidence (90%), supported by evidence indicating partner of its former payroll provider ADP exploited during transition. Under the Persistence tactic, the analysis identified Account Manipulation: Additional Cloud Credentials (T1098.003) with moderate to high confidence (70%), supported by evidence indicating ransomware attack implies potential credential abuse for persistence in BSH systems. Under the Privilege Escalation tactic, the analysis identified Valid Accounts: Cloud Accounts (T1078.004) with moderate to high confidence (80%), supported by evidence indicating partner of its former payroll provider ADP suggests abuse of valid cloud/payroll system accounts. Under the Defense Evasion tactic, the analysis identified Indicator Removal: File Deletion (T1070.004) with moderate to high confidence (75%), supported by evidence indicating ransomware attack typically involves deletion of logs or backup interference and Impair Defenses: Disable/Modify Tools (T1562.001) with moderate to high confidence (70%), supported by evidence indicating el Dorado ransomware gang known for disabling security tools pre-encryption. Under the Credential Access tactic, the analysis identified Unsecured Credentials: Credentials In Files (T1552.001) with moderate to high confidence (85%), supported by evidence indicating payroll provider partner systems likely stored credentials for Broadcom employee data access and OS Credential Dumping: Security Account Manager (T1003.002) with moderate to high confidence (70%), supported by evidence indicating el Dorado ransomware often uses credential dumping for lateral movement. Under the Discovery tactic, the analysis identified File and Directory Discovery (T1083) with moderate to high confidence (80%), supported by evidence indicating compromised data includes structured PII/financial records, suggesting targeted discovery and System Owner/User Discovery (T1033) with moderate to high confidence (75%), supported by evidence indicating middle Eastern employees data suggests actor identified/isolated regional user accounts. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (95%), supported by evidence indicating birthdates, email addresses, phone numbers, home addresses, national ID numbers... exfiltrated from BSH and Data from Information Repositories: Sharepoint or Cloud Storage (T1213.002) with moderate to high confidence (80%), supported by evidence indicating payroll provider repositories likely hosted in cloud/sharepoint systems. Under the Exfiltration tactic, the analysis identified Exfiltration Over Alternative Protocol: Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol (T1048.003) with moderate to high confidence (85%), supported by evidence indicating data exfiltration confirmed; ransomware gangs often use DNS/HTTP for exfil and Automated Exfiltration: Traffic Duplication (T1020.001) with moderate to high confidence (70%), supported by evidence indicating large-scale employee data theft suggests automated batch exfiltration. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (90%), supported by evidence indicating el Dorado ransomware gang primary tactic; though encryption not explicitly confirmed, Data Destruction (T1485) with moderate confidence (60%), supported by evidence indicating ransomware attack may involve partial destruction if backups targeted, and Data Theft (T1659) with high confidence (100%), supported by evidence indicating theft of Middle Eastern employees sensitive data explicitly stated. Under the Lateral Movement tactic, the analysis identified Remote Services: Windows Admin Shares (T1021.006) with moderate to high confidence (70%), supported by evidence indicating third-party breach suggests movement from BSH to ADP-connected systems. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.