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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.
Case Study  Catching A Human Operated Maze Ransomware Attack In Action 1
labs
Adversary

Case Study: Catching a Human-Operated Maze Ransomware Attack In Action

Jim Walter / August 13, 2020

Maze operators tailor attacks to the victim’s environment to evade detection. We show how they operate, and reveal a decoded HDA payload among other IOCs.

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Agent Tesla   Old RAT Uses New Tricks To Stay On Top 4
labs
Crimeware

Agent Tesla | Old RAT Uses New Tricks to Stay on Top

Jim Walter / August 10, 2020

Aside from Dridex, Agent Tesla is the most widely used malware currently targeting businesses. We review its core functionality and latest adaptations.

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sentinelone

The Good, the Bad and the Ugly in Cybersecurity – Week 30

The Good, the Bad and the Ugly | 4 minute read
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WastedLocker Ransomware   Abusing ADS And NTFS File Attributes 4
labs
Crimeware

WastedLocker Ransomware: Abusing ADS and NTFS File Attributes

Jim Walter / July 23, 2020

WastedLocker is a relatively new ransomware that has been attacking high-value targets across numerous industries, including several Fortune 500 companies.

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sentinelone

The Good, the Bad and the Ugly in Cybersecurity – Week 27

The Good, the Bad and the Ugly | 4 minute read
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Thanos Ransomware   A Rapidly Evolving RaaS Targets Legacy AV Backup Solutions 12
labs
Crimeware

Thanos Ransomware | RIPlace, Bootlocker and More Added to Feature Set

Jim Walter / July 1, 2020

Thanos Ransomware has developed rapidly over the last 6 months, offering a customized RaaS tool with an expanding feature set to build unique payloads.

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sentinelone

The Good, the Bad and the Ugly in Cybersecurity – Week 25

The Good, the Bad and the Ugly | 5 minute read
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sentinelone

The Good, the Bad and the Ugly in Cybersecurity – Week 23

The Good, the Bad and the Ugly | 4 minute read
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NetWalker Ransomware Update   No Respite No English Required 2
labs
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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sentinelone

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

From the Front Lines | 6 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.

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