Threat Intelligence - RH-ISAC Blog

Before publishing, Descope informed Microsoft, several “large vulnerable applications,” and two authentication platform providers of the issue and Microsoft has reportedly taken mitigating steps. Context On June 20, 2023, researchers at Descope reported the technical details of a security flaw in the Microsoft Azure Active Directory (AD) Open Authorization (OAuth) process they dubbed “n0Auth.” According…

On June 13, 2023, security researchers at Trellix reported the details of a new information stealing malware written in Golang that they dubbed “Skuld.” Context Since April 2023, Trellix researchers observed the malware active against unspecified targets in North America, Europe, and Southeast Asia. Technical Details According to the report, Skuld attempts to steal sensitive…

On March 24, 2023, Proofpoint released their report, “Account Compromise, Financial Theft, and Supply Chain Attacks: Analyzing the Small and Medium Business APT Phishing Landscape in 2023.” Context The report provides insight into key trends in the increasing prevalence of sophisticated advanced persistent threats (APTs) targeting small and medium-sized businesses (SMBs). Key Takeaways Key points…

On May 23, 2023, Cofense researchers reported a phishing campaign with threat actors leveraging paid time off (PTO) and vacation requests as a lure theme. Context The report is based on a Phishing Defence Center (PDC)-reported a phishing campaign where threat actors sent emails to users claiming to be from ‘HR Departments’ and providing the users with links…

Context On May 16, 2023, ZScaler threat researchers reported the technical details of a new ransomware-as-a-service (RaaS) operation they’ve observed being advertised on dark web forums. ZScaler researchers provided the following key takeaways: CryptNet is a new ransomware-as-a-service that has been advertised in underground forums since at least April 2023 The CryptNet threat group claims…

Context On May 4, 2023, VulnCheck researchers released a proof-of-concept (POC) exploit for CVE-2023-27350. According to the report, the exploit bypasses current detection options for attacks leveraging the vulnerability. Technical Details According to NIST, CVE-2023-27350 “allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to…

On April 26, 2023, BitDefender Labs researchers reported the technical details of a new custom malware named BellaCiao they attribute to the Iranian Charming Kitten advanced persistent threat (APT). Context According to the report, “This malware is tailored to suit individual targets and exhibits a higher level of complexity, evidenced by a unique communication approach…

Context On April 25, 2023, BlackBerry threat intelligence researchers released their Global Threat Report for the December 2022-February 2023 period. According to the report, BlackBerry researchers observed up to 12 attacks per minute, new malware sample increases of 50% in prevalence. Key Takeaways Key findings from the report for the retail, hospitality, and travel communities…

On April 13, 2023, Cado Labs researchers reported the technical details of a new malware they dubbed “Legion.” Context According to the report, Legion is written in Python and includes credential harvesting and SMTP hijacking capabilities. Researchers reported that the tool is currently being sold on Telegram. Technical Details According to researchers, key features of…

Context On April 11, 2023, 3CX released the initial results of Mandiant’s incident response and investigation into the supply chain attack that compromised 3CXDesktopApp. According to the report, the activity is attributable to the North Korean threat group UNC4736. Technical Details According to Mandiant: “the attacker infected targeted 3CX systems with TAXHAUL (AKA “TxRLoader”) malware….