Cyber Incident Victim: MasterCard
Date:
Apr 2015
Location:
United States of America
Summary
A MasterCard Online Resources domain was compromised and defaced by Indonesian hacker group Gantengers Crew, who replaced the site's content with a message claiming the attack demonstrated vulnerabilities in financial data security. The group did not specify whether customer payment information was accessed but emphasized their intrusion capabilities, consistent with their prior breaches of high-profile organizations including Australian National University and WWF Philippines. Following the incident, the affected domain displayed a scheduled maintenance notice, with no confirmed data compromise disclosed in available reports.
| CIA Posture | Motives | Tactics, Techniques & Procedures |
|---|---|---|
| Available to members | 2 motives | 1 technique |
| Threat Actor | Type | Location |
|---|---|---|
| 1 actor | Available to members | Available to members |
Description
On April 25, 2015, the Online Resources domain of MasterCard (arm.mastercard.com) was compromised by Indonesian hacking group Gantengers Crew. The attackers defaced the website, replacing its content with a custom page that included a written statement. Initial analysis of the defacement did not reveal the hackers' specific motivation for targeting MasterCard. The group subsequently disclosed to cybersecurity news outlet HackRead that the attack aimed to demonstrate vulnerabilities in MasterCard's financial data security, stating, "We wanted to show what we are capable of!" Evidence of the breach was documented through a Zone-H mirror entry (ID 24129064), which archived the defaced page. MasterCard's website displayed a scheduled maintenance notification when accessed shortly after the incident, though the article does not specify whether this resulted from attacker actions or corporate containment measures. No conclusive evidence indicated whether user payment card data (credit/debit) was accessed or exfiltrated during the intrusion.
The incident represented a reputational security event for MasterCard, occurring against the backdrop of Gantengers Crew's established pattern of high-profile website compromises. The group had previously targeted organizations including Australian National University, World Wildlife Fund (WWF), and Earth Hour Philippines in 2014. Technical impacts appeared limited to website defacement rather than systemic network compromise, though the article notes uncertainty regarding potential data exposure. MasterCard's public communications regarding the breach were not detailed in the source material beyond the maintenance notification observed at the time of journalistic reporting. The attackers leveraged the psychological impact of breaching a major financial brand to amplify their message about perceived security deficiencies, though no additional operational disruptions to MasterCard services were documented in the available account.