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Symantec Security Response to Petya Ransomware Outbreak

Petya ransomware impacting large organisations in multiple countries.

This new strain of the Petya ransomware started propagating on June 27, 2017, infecting many organisations. Similar toWannaCry, Petya uses the Eternal Blue exploit to propagate itself.

What is Petya?

Petya has been in existence since 2016. It differs from typical ransomware as it doesn’t just encrypt files, it also overwrites and encrypts the master boot record (MBR).

In this latest attack, the following ransom note is displayed on infected machines, demanding that $300 in bitcoins be paid to recover files:


How does Petya spread and infect computers?
Petya propagates itself by exploiting the MS17-010 vulnerability, also known as Eternal Blue. Symantec continues to investigate other possible methods of propagation.

Who is impacted?
At time of writing, Petya is primarily impacting organisations in Europe.

Is this a targeted attack?
It’s unclear at this time, however, previous strains of Petya have been used in targeted attacks against organisations.

Am I protected from the Petya Ransomware?
Symantec Endpoint Protection (SEP) and Norton products proactively protect customers against attempts to spread Petya using Eternal Blue. SONAR behavior detection technology also proactively protects against Petya infections. Symantec products also detect Petya components as Ransom.Petya.

What are the details of Symantec's protection?
Network-based protection
Symantec has the following IPS protection in place to block attempts to exploit the MS17-010 vulnerability:

• OS Attack: Microsoft SMB MS17-010 Disclosure Attempt (released May 2, 2017)
• Attack: Shellcode Download Activity (released April 24, 2017)

Antivirus
• Ransom.Petya

Symantec is continuing to analyze this threat and will post further information as soon as it becomes available.


ENDS

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