Security Experts:

Connect with us

Hi, what are you looking for?



Mexican Oil Company Pemex Hit by Ransomware

Mexican state-owned oil company Petróleos Mexicanos (Pemex) on Sunday suffered a ransomware attack that took down parts of its network.

Mexican state-owned oil company Petróleos Mexicanos (Pemex) on Sunday suffered a ransomware attack that took down parts of its network.

The attack, the company claims, was quickly neutralized and only impacted less than 5% of the computers in its network.

In an attempt to stop any rumors related to the suffered attack, the company also pointed out that it is operating normally and that production, supply, and inventories of fuel were not impacted.

Pemex also notes that its internal network, “like all major national and international government and financial companies and institutions,” is frequently targeted in cyber-attacks.

The company did not provide specific information on the incident, but security researchers revealed on Twitter that the DoppelPaymer ransomware was involved.

The attackers apparently demanded a 565 BTC ($4.9 million) ransom to be paid, while also claiming that they gathered sensitive data from the Pemex network. The miscreants also threaten to share the allegedly stolen information publicly if the company does not pay the ransom.

Initially detailed in July this year, DoppelPaymer is a forked version of BitPaymer, a piece of ransomware built by TA505, the threat actor behind the infamous Dridex and Locky ransomware. DoppelPaymer, researchers say, is likely the work of members of TA505 that left the group to start their own operation.

DoppelPaymer, security researcher Vitali Kremez points out, is often dropped via an infection chain that starts with Emotet installing Dridex.

According to BleepingComputer, Pemex apparently did not try to contact the attackers regarding a possible payment.

Related: Forked Version of BitPaymer Ransomware Emerges

Related: Hosting Provider SmarterASP.NET Recovering From Ransomware Attack

Related: Pitney Bowes Says Disruptions Caused by Ryuk Ransomware

Written By

Ionut Arghire is an international correspondent for SecurityWeek.

Click to comment

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts.

Join this webinar to learn best practices that organizations can use to improve both their resilience to new threats and their response times to incidents.


Join this live webinar as we explore the potential security threats that can arise when third parties are granted access to a sensitive data or systems.


Expert Insights

Related Content


Zendesk is informing customers about a data breach that started with an SMS phishing campaign targeting the company’s employees.


Satellite TV giant Dish Network confirmed that a recent outage was the result of a cyberattack and admitted that data was stolen.


The release of OpenAI’s ChatGPT in late 2022 has demonstrated the potential of AI for both good and bad.


The changing nature of what we still generally call ransomware will continue through 2023, driven by three primary conditions.

Application Security

PayPal is alerting roughly 35,000 individuals that their accounts have been targeted in a credential stuffing campaign.


As it evolves, web3 will contain and increase all the security issues of web2 – and perhaps add a few more.


No one combatting cybercrime knows everything, but everyone in the battle has some intelligence to contribute to the larger knowledge base.


A recently disclosed vBulletin vulnerability, which had a zero-day status for roughly two days last week, was exploited in a hacker attack targeting the...