Coupang Breach Incident Score: Analysis & Impact (COU1764583559)

In this Rankiteo incident briefing, we review the Coupang breach identified under incident ID COU1764583559.

The analysis begins with a detailed overview of Coupang's information like the linkedin page: https://www.linkedin.com/company/coupang, the number of followers: 226701, the industry type: Software Development and the number of employees: 7994 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 758 and after the incident was 695 with a difference of -63 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 Coupang and their customers.

On 20 November 2023, Coupang disclosed Data Breach issues under the banner "Coupang Data Breach Exposes 33 Million Customer Records".

The personal data of more than 33 million Coupang customers was leaked in a breach believed to have started on June 24 through overseas servers.

The disruption is felt across the environment, affecting Coupang's customer database servers, and exposing names, email addresses and phone numbers, with nearly 33,000,000+ records at risk.

In response, teams activated the incident response plan, and stakeholders are being briefed through Public disclosure by South Korean authorities and Coupang.

The case underscores how Ongoing (police tracking IP addresses, examining security weaknesses).

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 Valid Accounts: Cloud Accounts (T1078.004) with high confidence (95%), supported by evidence indicating abused authentication vulnerabilities via active authentication key of a former employee. Under the Persistence tactic, the analysis identified Account Manipulation: Additional Cloud Credentials (T1098.003) with high confidence (90%), supported by evidence indicating authentication key that was still active after the termination of the person’s contract. 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 authentication vulnerabilities in Coupang’s servers exploited via residual credentials. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (95%), supported by evidence indicating access to customer information, including names, email addresses, phone numbers, shipping addresses and order histories. Under the Exfiltration tactic, the analysis identified Exfiltration Over Alternative Protocol: Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol (T1048.003) with high confidence (90%), with evidence including breach started on June 24 through overseas servers, and data exfiltration such as Yes (via overseas servers). Under the Impact tactic, the analysis identified Data from Cloud Storage Object: Data from Cloud Customer Environment (T1598.003) with high confidence (95%), with evidence including personal data of more than 33 million customers was leaked, and high sensitivity of data (PII). Under the Defense Evasion tactic, the analysis identified Indicator Removal: File Deletion (T1070.004) with moderate to high confidence (70%), supported by evidence indicating breach undiscovered until November 18 (5-month dwell time suggests log/trace manipulation) and Impair Defenses: Disable or Modify Tools (T1562.001) with moderate confidence (65%), supported by evidence indicating police examining potential security weaknesses (implies possible defensive gaps). These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.