Incident Score: Analysis & Impact (TEL1773059780)

In this Rankiteo incident briefing, we review the Telegram Messenger breach identified under incident ID TEL1773059780.

The analysis begins with a detailed overview of Telegram Messenger's information like the linkedin page: https://www.linkedin.com/company/telegram-messenger, the number of followers: 0, the industry type: Technology, Information and Internet and the number of employees: 2897 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 838 and after the incident was 805 with a difference of -33 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 Telegram Messenger and their customers.

Telegram recently reported "Telegram’s Privacy Reputation Under Scrutiny After Major Leaks and Vulnerabilities", a noteworthy cybersecurity incident.

Telegram, long marketed as a privacy-focused alternative to mainstream messaging apps, has faced growing scrutiny after a series of high-profile data exposures and security flaws revealed significant risks to users.

The disruption is felt across the environment, affecting Telegram Mobile Apps (Android & iOS) and Telegram API, and exposing 200 million user records (email addresses, phone numbers, usernames), with nearly 200 million records at risk.

In response, moved swiftly to contain the threat with measures like Warning prompt added for MTProxy vulnerability (partial fix), and began remediation that includes Acknowledged vulnerabilities; no architectural changes disclosed, and stakeholders are being briefed through Public statements downplaying leaks; emphasis on user responsibility for security.

The case underscores how Ongoing (partial fixes implemented; root causes not fully addressed), teams are taking away lessons such as Telegram’s privacy branding does not fully align with its security realities; users must adopt proactive measures (e.g., 2FA, link scrutiny) to mitigate risks. The incidents highlight gaps in protecting non-public data and architectural vulnerabilities in privacy-focused platforms, and recommending next steps like Enable two-factor authentication (2FA) for all accounts, Scrutinize links before clicking, especially those involving MTProxy or usernames and Businesses should assess the necessity of Telegram API access and consider blocking it if not critical, with advisories going out to stakeholders covering Cybersecurity firms (e.g., NVISO) recommend blocking Telegram API for businesses without critical need due to growing risks.

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.