William MacArthur (@Anti_Expl0it) header
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Director of Threat Research & Intelligence @InQuest: All views expressed are from my own brain. “Sharing is caring”

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Joined September 2016
Photo by William MacArthur (@Anti_Expl0it)Photo by William MacArthur (@Anti_Expl0it)Photo by William MacArthur (@Anti_Expl0it)Photo by William MacArthur (@Anti_Expl0it)Photo by William MacArthur (@Anti_Expl0it)Photo by William MacArthur (@Anti_Expl0it)Photo by William MacArthur (@Anti_Expl0it)Photo by William MacArthur (@Anti_Expl0it)Photo by William MacArthur (@Anti_Expl0it)Photo by William MacArthur (@Anti_Expl0it)
William MacArthur retweeted
In an era of sophisticated ⚠️ cyber-attacks, 📝 documenting attack sequences is crucial for proactive🛡️ prevention. 🔗 Read our blog by @anti_Expl0it for a view on threat sequencing and its significance ➡️ hubs.ly/Q02bFstM0 #ThreatSequencing #ThreatIntel #Cybersecurity
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William MacArthur retweeted
InQuest and @Threatlabz have analyzed #MysticStealer, a new malware family that extracts data from various sources, including web browsers and cryptocurrency wallets, through its obfuscation techniques ➡️ bit.ly/3N7IHe1 #Malware #CyberSecurity #Cryptocurrency
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William MacArthur retweeted
New @InQuest blog post covering the recent rise of Microsoft OneNote as a malware carrier: inquest.net/blog/2023/02/27/… We cover the timeline, campaigns, and tools. You can find downloadable samples and YARA detection logic at: github.com/InQuest/malware-s… github.com/InQuest/yara-rule…
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William MacArthur retweeted
The holidays are here. Be careful what gifts you open! inquest.net/blog/2022/12/14/… #ransomware #threatintel
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William MacArthur retweeted
📌 Watch our intro video, access our open research portal: labs.inquest.net Follow our Blog: inquest.net/blog See our open-source work: github.com/InQuest Connect on LinkedIn: linkedin.com/company/inquest……… Tweets with 🤖 are InQuest Labs automation.
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William MacArthur retweeted
Some field notes on an active and successful Phishing campaign that leverages a low-detection document-based lure, to pivot through various hosting providers. Samples, IOCs, and more: inquest-labs.notion.site/202… #phishing #malware #malwareanalysis
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William MacArthur retweeted
I'm very excited to share that after countless sleepless nights we're having a break-out year at @InQuest and are looking to double in size in the near term. We're seeking senior talent in both research & development as well as sales & marketing: inquest.net/careers
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William MacArthur retweeted
We've just added a notion of "collections" to the file corpus (DFI) of labs.inquest.net. Included today are files from InQuest Macro Clustering (~10k), the Enron leak (~16k), and those from the dataset used in the "Invoice #31415 attached" research paper (~15k).
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William MacArthur retweeted
Looks like #Qbot is back in action. Green Lure seen at least, where is the blue :P labs.inquest.net/dfi/sha256/… 5.254.118.]198 91.194.11.]15 146.70.87.]163 @James_inthe_box @Cryptolaemus1 @Anti_Expl0it @Autow00t
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William MacArthur retweeted
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William MacArthur retweeted
As a follow up to the previous graphic outlining threats affecting #Ukraine, here is a high level blog on observed threats. Big thanks to the #infosec community for making this possible, #SlavaUkraini @Anti_Expl0it @Autow00t @juanandres_gs @flakpaket inquest.net/blog/2022/04/07/…
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William MacArthur retweeted
Interesting Doughnut 0 VT Score for a "Test?" Doc leading to #Metasploit labs.inquest.net/dfi/sha256/… FYI: We heard some others seeing some waves of this week. @James_inthe_box @Anti_Expl0it @executemalware @Autow00t
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William MacArthur retweeted
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William MacArthur retweeted
An update our previous graphic we shared on the cyber-front of the #ukraine conflict. This content was collected from various sources and collaborations within the #infosec community. Special thanks to all involved. @Anti_Expl0it @Autow00t @juanandres_gs @flakpaket
William MacArthur retweeted
We are sharing this visual for tracking threat actors/groups related to the current #ukraine conflict. The content was collected from various sources within the #infosec community. Special thanks to all involved. @Anti_Expl0it @Autow00t @juanandres_gs
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William MacArthur retweeted
This is an odd one here with extreme uri length + directory traversal flavor a+ .dotm file suffix. AS37963 - ALIBABA (US) TECHNOLOGY. Note labs.inquest.net/dfi/sha256/… @James_inthe_box @JRoosen @Anti_Expl0it @dms1899
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William MacArthur retweeted
Seeing a lot of low score #Dridex docs right now... lots of various lures again. labs.inquest.net/dfi/sha256/… @JRoosen @Anti_Expl0it @James_inthe_box @Autow00t
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William MacArthur retweeted
Today is the day for our #log4j panel discussion. You can still register for today's virtual event on #CVE-2021-44228 (which will take place at 3 PM ET/12 PM PST): bit.ly/3pLpEud