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Author

Jim Walter

Jim Walter is a Senior Threat Researcher at SentinelOne focusing on evolving trends, actors, and tactics within the thriving ecosystem of cybercrime and crimeware. He specializes in the discovery and analysis of emerging cybercrime "services" and evolving communication channels leveraged by mid-level criminal organizations. Jim joined SentinelOne following ~4 years at a security start-up, also focused on malware research and organized crime. Previously, he spent over 17 years at McAfee/Intel running their Threat Intelligence and Advanced Threat Research teams.

Jim Walter

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Blog posts by Jim Walter

  • LostTrust Ransomware | Latest Multi-Extortion Threat Shares Traits with SFile and Mindware

    LostTrust Ransomware | Latest Multi-Extortion Threat Shares Traits with SFile and Mindware

  • Sep 2023 Cybercrime Update | New Ransomware Threats and the Rising Menace of Telegram 

    Sep 2023 Cybercrime Update | New Ransomware Threats and the Rising Menace of Telegram

  • Threat Actor Interplay | Good Day’s Victim Portals and Their Ties to Cloak

    Threat Actor Interplay | Good Day’s Victim Portals and Their Ties to Cloak

  • From Conti to Akira | Decoding the Latest Linux & ESXi Ransomware Families

    From Conti to Akira | Decoding the Latest Linux & ESXi Ransomware Families

  • LOLKEK Unmasked | An In-Depth Analysis of New Samples and Evolving Tactics

    LOLKEK Unmasked | An In-Depth Analysis of New Samples and Evolving Tactics

  • Rhysida Ransomware | RaaS Crawls Out of Crimeware Undergrowth to Attack Chilean Army 

    Rhysida Ransomware | RaaS Crawls Out of Crimeware Undergrowth to Attack Chilean Army

  • CatB Ransomware | File Locker Sharpens Its Claws to Steal Data with MSDTC Service DLL Hijacking

    CatB Ransomware | File Locker Sharpens Its Claws to Steal Data with MSDTC Service DLL Hijacking

  • Recent TZW Campaigns Revealed As Part of GlobeImposter Malware Family

    Recent TZW Campaigns Revealed As Part of GlobeImposter Malware Family

  • Gotta Catch 'Em All | Understanding the NetSupport RAT Campaigns Hiding Behind Pokemon Lures

    Gotta Catch 'Em All | Understanding the NetSupport RAT Campaigns Hiding Behind Pokemon Lures

  • Venus Ransomware | Zeoticus Spin-off Shows Sophistication Isn’t Necessary for Success

    Venus Ransomware | Zeoticus Spin-off Shows Sophistication Isn’t Necessary for Success

  • From the Front Lines | Slam! Anatomy of a Publicly-Available Ransomware Builder

    From the Front Lines | Slam! Anatomy of a Publicly-Available Ransomware Builder

  • BlueSky Ransomware | AD Lateral Movement, Evasion and Fast Encryption Put Threat on the Radar

    BlueSky Ransomware | AD Lateral Movement, Evasion and Fast Encryption Put Threat on the Radar