CVE-2020-0601 (also known as "Chain of Fools" or "Curveball") is a Windows CryptoAPI Spoofing vulnerability found in the validation mechanism for Elliptic Curve Cryptography certificates. Exploitation of this could allow an attacker to sign a malicious executable using a spoofed code-signing certificate, leading to a man-in-the-middle (MITM) attack and decryption of sensitive information.

In order to assist customers and researchers, InQuest has released an additional layer of protection in the form of a YARA signature. This detection capability can help organizations strengthen their overall security posture, especially in situations where comprehensive patching may take some time.

YARA Signature
Latest InQuest™ Blog Posts

Hiding In Plain Sight

Posted on 2020-02-24 Samuel Kimmons

Samuel Kimmons is a Lead Cyber Threat Emulator/Red Teamer and Penetration Tester at the United States-Air Force Computer Emergency Response Team (US-AFCERT). In his guest blog, he discusses LoLBins or Living Off the Land Binaries to get PowerShell without PowerShell.

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Reverse Engineering on Windows: A Focus on Malware

Posted on 2020-02-25 by Josiah Smith

Our CTO, Pedram Amini, and colleague Ero Carrera have open-sourced all the materials from a two-day reverse engineering class they taught over the years at BlackHat, the last instance being at Blackhat 2009 Federal. Written in LaTeX + Beamer. The courseware includes malware samples and all requisite references, scripts, tools, exercises, and solutions.

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InQuest™ Labs Research Spotlight


Mitaka is a browser extension for OSINT research that can extract & refang IoCs from a selected block of text and then search for the indicator on various engines.

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ollypwn's CurveBall

PoC for CVE-2020-0601, or commonly referred to as CurveBall, is a vulnerability in which the signature of certificates using elliptic curve cryptography (ECC) is not correctly verified.

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Ransomware as a Service. This educational tool was made to demonstrate ransomware and how easy it is to make. It works on Windows, Linux and MacOS.

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Global Security Events

PLA Personnel Charged with Computer Fraud, Economic Espionage and Wire Fraud for Hacking Equifax

Indictment Alleges Four Members of China’s People’s Liberation Army Engaged in a Three-Month Long Campaign to Steal Sensitive Personal Information of Nearly 150 Million Americans.

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FBI Warns of DDoS Attack on State Voter Registration Site

The US Federal Bureau of Investigation (FBI) warned of a potential Distributed Denial of Service (DDoS) attack that targeted a state-level voter registration and information site in a Private Industry Notification. The website received anomalous DNS server requests consistent with a Pseudo Random Subdomain attack. Read more

India's Data Protection Bill Threatens Global Cybersecurity

The proposed ban on re-identification discourages researchers from investigating security weaknesses—and encourages criminals to exploit them. India intends to ban re-identification without consent and subject it to financial penalties or jail time.

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