Jason Reaves, Author at SentinelOne

Anchor Project for Trickbot Adds ICMP

The team behind Trickbot has been aggressively updating and deploying various modules including Anchor and Bazar Loader targeting high-value targets, including healthcare entities

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Enter the Maze: Demystifying an Affiliate Involved in Maze (SNOW)

SentinelLabs profiles an affiliate involved with Maze ransomware and details the actor’s involvement with other crimeware families, including TrickBot.

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Breaking EvilQuest | Reversing A Custom macOS Ransomware File Encryption Routine

A new macOS ransomware threat uses a custom file encryption routine not based on public key encryption. Jason Reaves shows how we broke it.

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Valak Malware and the Connection to Gozi Loader ConfCrew

Valak uses a multi-stage, script-based malware that hijacks email replies and embeds malicious URLs or attachments to infect devices with fileless scripts.

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Sarwent Malware Continues to Evolve With Updated Command Functions

Sarwent has received little attention from researchers, but this backdoor malware is still being actively developed, with new commands and a focus on RDP.

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Deep Dive Into TrickBot Executor Module “mexec”: Reversing the Dropper Variant

Continuing our earlier analysis of the TrickBot Executor Module “mexec”, we take a look at the dropper variant and reveal how it carries its payload onboard.

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Deep Dive Into TrickBot Executor Module “mexec”: Hidden “Anchor” Bot Nexus Operations

New “mexec” module delivers tertiary malware and allows TrickBot to pivot within a network, deploy a variety of payloads and evade common detection methods.

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Breaking TA505’s Crypter with an SMT Solver

TA505 threat group use a crypter common to Clop/CryptoMix ransomware and others. We tear it down with a new unpacker utilizing SMT.

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Revealing the Trick | A Deep Dive into TrickLoader Obfuscation

TrickBot’s loader has received much less attention than other components of the malware. Jason Reaves shows how to reverse engineer the TrickLoader function.

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