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Antonis Terefos

Antonis Terefos is a Threat Intelligence Researcher at SentinelOne, focusing on Cybercrime. His expertise includes reverse engineering, malware analysis and creating tools automating malware reversing.
Cl0p Ransomware Targets Linux Systems With Flawed Encryption Decryptor Available 9
Crimeware

Cl0p Ransomware Targets Linux Systems with Flawed Encryption | Decryptor Available

Antonis Terefos / February 7, 2023

An in-the-wild ELF variant of Cl0p ransomware shows the gang is looking beyond traditional Windows targets.

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Nokoyawa Ransomware New KarmaNemty Variant Wears Thin Disguise 5
Crimeware

Nokoyawa Ransomware | New Karma/Nemty Variant Wears Thin Disguise

Antonis Terefos / April 21, 2022

Nemty developers have created a new, flawed update to the Karma ransomware variant in a bid to avoid detection and mislead attribution.

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Karma Ransomware An Emerging Threat With A Hint Of JSWorm Pedigree 6
Crimeware

Karma Ransomware | An Emerging Threat With A Hint of Nemty Pedigree

Antonis Terefos / October 18, 2021

Exploring the links between Karma and other well-known malware families such as NEMTY and JSWorm, we find further IoCs and an evolving threat.

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SentinelLabs

In the era of interconnectivity, when markets, geographies, and jurisdictions merge in the melting pot of the digital domain, the perils of the threat ecosystem become unparalleled. Crimeware families achieve an unparalleled level of technical sophistication, APT groups are competing in fully-fledged cyber warfare, while once decentralized and scattered threat actors are forming adamant alliances of operating as elite corporate espionage teams.

Recent Posts

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