Incident Score: Analysis & Impact (TEL1774873599)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Telnyx's Cyber Attack and lateral movement inside company's environment.
- Overview of affected data sets, including SSNs and PHI, and why they materially increase incident severity.
- How Rankiteo’s incident engine converts technical details into a normalized incident score.
- How this cyber incident impacts Telnyx Rankiteo cyber scoring and cyber rating.
- Rankiteo’s MITRE ATT&CK correlation analysis for this incident, with associated confidence level.
Full Incident Analysis Transcript
In this Rankiteo incident briefing, we review the Telnyx breach identified under incident ID TEL1774873599.
The analysis begins with a detailed overview of Telnyx's information like the linkedin page: https://www.linkedin.com/company/telnyx, the number of followers: 25434, the industry type: Software Development and the number of employees: 367 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 755 and after the incident was 737 with a difference of -18 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 Telnyx and their customers.
On 27 March 2026, Telnyx disclosed Supply Chain Attack issues under the banner "TeamPCP Exploits Telnyx Python SDK in Supply Chain Attack".
A newly identified hacking group, TeamPCP, has targeted Telnyx, a widely used communication platform, by embedding malicious code in compromised versions of its Python SDK.
The disruption is felt across the environment, affecting Developer systems that installed compromised SDK versions, and exposing SSH keys, cryptocurrency wallets (Bitcoin, Ethereum), cloud credentials (Google Cloud, Azure).
In response, moved swiftly to contain the threat with measures like Removal of compromised SDK versions from PyPI, advisory to downgrade to version 4.87.0, and began remediation that includes Rotation of exposed credentials, and stakeholders are being briefed through Public advisory to affected developers.
The case underscores how Ongoing, teams are taking away lessons such as Growing threat of supply chain attacks via trusted software components, and recommending next steps like Rotate exposed credentials, monitor for unauthorized access, and verify software supply chain integrity, with advisories going out to stakeholders covering Telnyx confirmed core infrastructure was unaffected; SDK operates independently of backend systems.
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.
MITRE ATT&CK® Correlation Analysis
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: Compromise Software Supply Chain (T1195.002) with high confidence (95%), supported by evidence indicating hackers uploaded two tainted versions of the Telnyx Python library (4.87.1 and 4.87.2) to PyPI. Under the Execution tactic, the analysis identified User Execution: Malicious File (T1204.002) with high confidence (90%), supported by evidence indicating disguising malicious functionality within a file named _client.py triggered download of ringtone.wav. Under the Credential Access tactic, the analysis identified Unsecured Credentials: Credentials In Files (T1552.001) with high confidence (95%), supported by evidence indicating scanned infected systems for SSH keys, cryptocurrency wallets, and cloud credentials. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating scanned for SSH keys, cryptocurrency wallets (Bitcoin, Ethereum), and cloud credentials. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (80%), supported by evidence indicating potential data exfiltration of SSH keys, cryptocurrency wallets, and cloud credentials. Under the Defense Evasion tactic, the analysis identified Masquerading: Match Legitimate Name or Location (T1036.005) with high confidence (90%), supported by evidence indicating disguising malicious functionality within a file named _client.py and decoy ringtone.wav. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Telnyx Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/telnyx/incident/TEL1774873599
- Telnyx CyberSecurity Rating page: https://www.rankiteo.com/company/telnyx
- Telnyx Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/tel1774873599-telnyx-cyber-attack-march-2026/
- Telnyx CyberSecurity Score History: https://www.rankiteo.com/company/telnyx/history
- Telnyx CyberSecurity Incident Source: https://hackread.com/teampcp-fake-ringtone-file-tainted-telnyx-sdk-credentials/
- Rankiteo A.I CyberSecurity Rating methodology: https://www.rankiteo.com/Images/rankiteo_algo.pdf
- Rankiteo TPRM Scoring methodology: https://static.rankiteo.com/model/rankiteo_tprm_methodology.pdf