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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.
NetWalker Ransomware Update   No Respite No English Required 2
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Crimeware

NetWalker Ransomware: No Respite, No English Required

Jim Walter / June 4, 2020

NetWalker is following a now-familiar pattern: increased ransom demands, threats to leak victim data and relentless attacks during the COVID-19 pandemic.

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Why On Device Detection Matters  New Ramsay Trojan Targets Air Gapped Networks 3
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Why On-Device Detection Matters: New Ramsay Trojan Targets Air-Gapped Networks

Jim Walter / May 20, 2020

A new malware framework infects air-gapped devices and eschews traditional C2 callbacks. How does it work, and will your security tools detect it?

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Blog Weekly Weekly
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The Good, the Bad and the Ugly in Cybersecurity – Week 20

Jim Walter / May 15, 2020

CISA name top 10 most commonly exploited vulns, Iran accused of attacking Israeli infrastructure, and Dallas school conference is hit by porno "Zoom bomb".

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Technical Overview Of NEMTY Successor Nefilim Nephilim Ransomware 4
labs
Crimeware

Meet NEMTY Successor, Nefilim/Nephilim Ransomware

Jim Walter / May 4, 2020

Ransomware families NEMTY, Nefilim and Nephilim continue to evolve and merge, taking on aspects of other successful variants that aim to encrypt and extort.

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Blog Weekly Weekly
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The Good, the Bad and the Ugly in Cybersecurity – Week 17

Jim Walter / April 24, 2020

83 phishing sites taken down in a single day with public cooperation, researcher reports critical bug in iOS Mail app and Maze gang go after Cognizant MSP.

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Maze Ransomware Update  Extorting And Exposing Victims 2
labs
Crimeware

Maze Ransomware Update: Extorting and Exposing Victims

Jim Walter / April 17, 2020

Maze ransomware doesn’t just demand payment for a decryptor but exfiltrates victim data and threatens to leak it publicly if the target doesn’t pay up.

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Blog Weekly Weekly
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The Good, the Bad and the Ugly in Cybersecurity – Week 14

Jim Walter / April 3, 2020

Microsoft targets hospitals with free help to identify VPN bugs, Marriott Hotels suffers a major data breach and a hacker dumps 25 win32k bugs on April 1st.

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Impact On Low To Mid Tier Criminals And Vendors 1
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Looking on the Bright Side of Coronavirus: Impact on Low-to-Mid-Tier Criminals and Vendors

Jim Walter / March 25, 2020

Criminals are also taking a hit from the Coronavirus pandemic as worldwide lockdowns disrupt the sale and distribution of illicit online goods and services.

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Blog Weekly Weekly
labs

The Good, the Bad and the Ugly in Cybersecurity – Week 11

Jim Walter / March 13, 2020

Necurs botnet finally taken down in joint action, Windows SMB suffers from a crucial wormable RCE flaw, and a new COVID-19 phish kit plays on public fears.

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DPRK HiddenCobra Update  North Korean Malicious Cyber Activity 1
labs
Advanced Persistent Threat

DPRK Hidden Cobra Update: North Korean Malicious Cyber Activity

Jim Walter / February 25, 2020

New threat intelligence on the ever-expanding toolset of North Korean APT Hidden Cobra (Lazarus) including IoCs for RATs, beacons, persistence and more.

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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.

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