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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.
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Anti-Ransomware Day 2025: 10 Years of RaaS and the Making of a Billion-Dollar Business

Company | 7 minute read
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DragonForce Ransomware Gang | From Hacktivists to High Street Extortionists

From the Front Lines | 9 minute read
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Dragon RaaS | Pro-Russian Hacktivist Group Aims to Build on “The Five Families” Cybercrime Reputation

From the Front Lines | 13 minute read
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HellCat and Morpheus | Two Brands, One Payload as Ransomware Affiliates Drop Identical Code

From the Front Lines | 8 minute read
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Cybervolk V2 Ftr
labs
Crimeware

CyberVolk | A Deep Dive into the Hacktivists, Tools and Ransomware Fueling Pro-Russian Cyber Attacks

Jim Walter / November 25, 2024

A loose collective of mostly low-skilled actors, CyberVolk absorbs and adapts a wide array of destructive malware for use against political targets.

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Kryptina Desert Ftr
labs
Crimeware

Kryptina RaaS | From Unsellable Cast-Off to Enterprise Ransomware

Jim Walter / September 23, 2024

Kryptina's adoption by Mallox affiliates complicates malware tracking as ransomware operators blend different codebases into new variants.

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sentinelone

DeathGrip RaaS | Small-Time Threat Actors Aim High With LockBit & Yashma Builders

From the Front Lines | 9 minute read
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NullBulge Ransomware Threat Actor Masquerades As Hacktivist Group Rebelling Against AI2
labs
Crimeware

NullBulge | Threat Actor Masquerades as Hacktivist Group Rebelling Against AI

Jim Walter / July 16, 2024

Actors are masquerading as hacktivists targeting AI-centric communities with commodity malware and customized LockBit payloads.

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sentinelone

Ikaruz Red Team | Hacktivist Group Leverages Ransomware for Attention Not Profit

From the Front Lines | 9 minute read
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Ransomware Evolution | How Cheated Affiliates Are Recycling Victim Data for Profit

From the Front Lines | 8 minute read
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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

  • FreeDrain Unmasked | Uncovering an Industrial-Scale Crypto Theft Network
    FreeDrain Unmasked | Uncovering an Industrial-Scale Crypto Theft Network
    May 8, 2025
  • Top Tier Target | What It Takes to Defend a Cybersecurity Company from Today’s Adversaries
    Top Tier Target | What It Takes to Defend a Cybersecurity Company from Today’s Adversaries
    April 28, 2025
  • AkiraBot | AI-Powered Bot Bypasses CAPTCHAs, Spams Websites At Scale
    AkiraBot | AI-Powered Bot Bypasses CAPTCHAs, Spams Websites At Scale
    April 9, 2025

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