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EvilAI Hydra7 / Hydraseven TamperedChef SolarMarker
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Beware of Fake 7zip Installer: upStage Proxy

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Deep dive into the UpStage Proxy malware campaign abusing a fake 7-Zip installer to deploy a GO-based residential proxy backdoor on Windows systems. Over the past couple weeks analysts have been looking at a suspicious 7zip installer which turns the host into a residential proxy (proxyware). I'm playfully calling this upStage Proxy (with a heroquest boardgame theme). More on the name will become clear in this article. The installer comes from 7zip[.]com, which, while looking professional, and having been around for quite some time, is in fact not the official site for the 7zip tool. The official site is 7-zip.org . *Update February 10, 2026: At this time the download link is now pointing to the official 7-zip.org download. The installer is signed by (now revoked) certificate:  "JOZEAL NETWORK TECHNOLOGY CO., LIMITED". The installer drops a version of 7zfm.exe that is also signed with this signer.  This version of 7zfm.exe differs from the official build in an importan...
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TamperedChef: Suspicious Recipe App is really Malware

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TamperedChef analysis: deep dive into a recipe-themed Windows/Electron app that hides obfuscated JS, covert C2 behavior, IOCs, and hunting tips. Hello World!  Let me introduce you to a new malware I'm calling TamperedChef .  Yesterday I came across the article Malvertising Alert: Recipe App Hijacks Credentials and Appears to Establish C&C Connection . This got me curious, so I decided to dig a bit deeper. I manually went to recipelister ( VirusTotal )  and downloaded recipelister.exe.  After reading the aforementioned blog, which observed the 7z-out folder, I figured why not use 7zip to extract recipelister.exe. Within the compressed file was app-64.7z, which I again extracted I extracted using 7zip.  At this point we have the main contents of what would appear in "AppData\Local\Temp\2w1rXpxZnwDUwuTeNvdD6FUkeI0".  Extracting app.asar: In order to extract app.asar to be easier to look at, I used this 7z asar plugin .  This is where things get int...
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EvilAI: Fake Online Speedtest Application

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