Petrobras Breach Incident Score: Analysis & Impact (PET1592215112025)

In this Rankiteo incident briefing, we review the Petrobras breach identified under incident ID PET1592215112025.

The analysis begins with a detailed overview of Petrobras's information like the linkedin page: https://www.linkedin.com/company/petrobras, the number of followers: 3611728, the industry type: Oil and Gas and the number of employees: 53942 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 812 and after the incident was 753 with a difference of -59 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 Petrobras and their customers.

On 14 November 2025, Petrobras disclosed data breach and ransomware attack issues under the banner "Everest Ransomware Group Targets Petrobras in Alleged Data Breach Involving Seismic Survey Data".

The Everest ransomware group listed two separate entries on its dark web leak site, both targeting Petrobras, a Brazilian state-owned petroleum corporation.

The disruption is felt across the environment, and exposing seismic navigation data (176 GB total), ship positioning and equipment configurations.

In response, and stakeholders are being briefed through no public comment as of disclosure and media outreach by Hackread.com for statement.

The case underscores how ongoing (no public confirmation from Petrobras; media outreach pending).

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 (T1078) with moderate to high confidence (70%), supported by evidence indicating high_value_targets include seismic survey databases (implies credential abuse or insider access) and Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating no explicit vector, but 176 GB exfiltration suggests possible web app compromise (common for ransomware). Under the Credential Access tactic, the analysis identified Unsecured Credentials: Credentials In Files (T1552.001) with moderate confidence (60%), supported by evidence indicating access to databases and processed reports may imply harvested credentials from config files and OS Credential Dumping (T1003) with moderate confidence (50%), supported by evidence indicating lateral movement likely to access 3D/4D survey datasets (common post-exploitation). Under the Discovery tactic, the analysis identified File and Directory Discovery (T1083) with high confidence (90%), supported by evidence indicating exfiltrated metadata, quality control documents, and field survey documentation (implies directory enumeration) and Network Service Discovery (T1046) with moderate to high confidence (70%), supported by evidence indicating targeting of seismic navigation data across multiple systems (suggests network mapping). Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (100%), supported by evidence indicating 176 GB of databases, documents, and processed reports exfiltrated and Data from Network Shared Drive (T1039) with moderate to high confidence (80%), supported by evidence indicating 90+ GB from Campos Basin surveys (likely stored on shared network drives). 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 (80%), supported by evidence indicating 176 GB exfiltrated; no mention of encryption during transfer (common for bulk data theft) and Exfiltration Over C2 Channel (T1041) with moderate to high confidence (70%), supported by evidence indicating tox encrypted messaging used for ransom demands (possible C2 for exfiltration). Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (90%), supported by evidence indicating everest Ransomware group (known for double extortion such as encryption + data theft) and Data Destruction (T1485) with moderate confidence (60%), supported by evidence indicating threat of further action if Tox contact ignored (implies potential data destruction). Under the Defense Evasion tactic, the analysis identified Indicator Removal: File Deletion (T1070.004) with moderate to high confidence (70%), supported by evidence indicating no logs or detection details provided (suggests cleanup of forensic evidence) and Impair Defenses: Disable or Modify Tools (T1562.001) with moderate confidence (60%), supported by evidence indicating 176 GB exfiltration undetected until ransomware disclosure (implies defense impairment). Under the Command and Control tactic, the analysis identified Proxy: External Proxy (T1090.004) with moderate to high confidence (70%), supported by evidence indicating tox messaging used for ransom demands (common for anonymized C2). These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.