Arnold Osipov
@osipov_ar
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Security Researcher @Morphisec | Former - Check Point Research | RE, Malware & Threat hunting | Software Engineer.
Israel
Joined October 2014
One day, my automation failed to unpack one of the #CHAES malware samples. I delved deeper to understand the reasons behind the glitch, revealing personal messages and code adjustments along the way. Enjoy the read 😁.
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Wohoo my name is there 🥹.
The MSRC team and I are excited up to connect and learn from security researchers and the community at Black Hat & DEF CON this week! If you spot me, I might have a shirt with your name on it. #blackhat2025 #blackhat #defcon @msftsecresponse
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Proud to share that @smgoreli and my talk, “Signature of Destruction: Outlook RCE Strikes Again”, got accepted to BlackHat Canada (SecTor)!.New Outlook RCE, new vector — details soon. #sectorca @BlackHatEvents
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Yesterday, Microsoft patched two Remote Code Execution vulnerabilities in Outlook that we discovered. 🙃 . 1. CVE-2025-47171 --> 2. CVE-2025-47176 --> ⚠️ More findings on the way — stay tuned.
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RT @LNadav: Joining the MCP trend with windbg-ext-mcp 🐛Now you can vibe debugging your Windows kernel:. Example of….
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RT @msftsecresponse: Day 2 of #ZeroDayQuest brought together brilliant minds from around the world for more hands-on hacking and meaningful….
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RT @msftsecresponse: Day 2 of #ZeroDayQuest brought even more hacking, problem-solving, and unforgettable moments. We then went to Carmine….
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RT @msftsecresponse: Day 1 of the Zero Day Quest Onsite Hacking Event is in the books and we’ve kicked off Day 2. We welcomed top security….
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RT @smgoreli: Having time off from a long exciting day hacking Microsoft products. With @osipov_ar and @shmuel_uzan at #ZeroDayQuest @msfts….
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🚀 Thrilled to share that I’ve been invited to Microsoft’s Zero Day Quest event in Redmond, Washington in 2025! 🔥. Over the past year, I’ve reported 4 RCE vulnerabilities and several other security issues to MSRC. Big thanks to @msftsecresponse for organizing this unique event!
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RT @morphisec: 📩 @osipov_ar & @smgoreli have uncovered and aided Microsoft in patching another Outlook vulnerability, CVE-2025-21357. 🔎 Se….
morphisec.com
Morphisec researchers have discovered an important Microsoft Outlook vulnerability. Read on for CVE-2025-21357 details and technical impact.
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Super excited to get into the Q2 top 10 Office researchers! 🎉 @msftsecresponse - Thank you for the opportunity 🙏 #CyberSecurity #Research #Microsoft
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Check out this #phishing #PDF posing as a #CrowdStrike updater for Windows hosts. It originates from the #Handala_Machine and ultimately delivers a #wiper using a variant of #CypherIT. PDF: cdfa4966d7a859b09a411f0d90efbf822b2d6671.ZIP: 66fbe2b33e545062a1399a4962b9af4fbbd4b356
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#Defcon we are coming!.Second RCE in outlook just released - #CVE-2024-38021. Stay tuned for more 🔥.
🚨 CVE-2024-38021 RCE in Outlook!🚨 .🌟 August is going to be HOT in Vegas, so don't miss our @defcon presentation "Outlook Unleashing RCE Chaos: CVE-2024-30103 & CVE-2024-38021." . Does not require authentication!.@osipov_ar , @shmuel_uzan Great work!.
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RT @smgoreli: Join me, @osipov_ar and @shmuel_uzan at #DEFCON32 this year for our presentation, "Outlook Unleashing RCE Chaos: CVE-2024-301….
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