Unit 42 analyzed an Atomic macOS (AMOS) stealer infection generated in a lab on Aug. 5, 2026, starting from a fake "macOS toolkit" instruction page hosted at getmacouscloud.com. The page tells victims to paste a command into Terminal, a ClickFix-style copy/paste technique, which downloads a Zsh script and then installs a Mach-O AMOS paylo…
Palo Alto Networks Unit 42 reports that a suspected advanced actor tracked as CL-STA-0954 (aka UNC5820) deployed a previously unreported memory-resident ARM64 implant, PEERSTITCH, on Fortinet FortiGate firewalls. The group exploited the FortiOS path traversal flaw CVE-2025-61624 for the final stage. The intrusion hit a telecommunications …
Microsoft Threat Intelligence reports active exploitation of CVE-2026-73570, a command injection flaw in Zimbra Collaboration Suite that allows unauthenticated, zero-click compromise of internet-facing email servers. Attackers deployed webshells, escalated privileges, harvested authentication secrets and staged mailbox data across organiz…
SafeDep reports that the PolinRider loader family now resolves its C2 servers from Ethereum mainnet. The loader reads small transactions from operator wallets and decodes the recipient address as an IP:port. SafeDep confirmed 35 GitHub repositories carrying the loader at HEAD on 2026-09-30 (7,578 stars and 2,884 forks combined). The inves…
GreyNoise reports that a single malicious cyber actor, tracked since 7 May 2026, is a suspected Chinese speaker working in UTC+8 and is the same as or related to Red Heron (reported by Acronis), based on the shared C2 domain, malware family, Gitea exploitation and other TTPs. The actor exploited the wp2shell WordPress chain (CVE-2026-6303…
The FBI, CISA, DC3, NSA, USSS and the Republic of Korea's KNPA issued joint advisory AA26-222A on Gunra ransomware. Gunra appeared in April 2025 as a double-extortion variant derived from the leaked Conti source code. It launched a structured RaaS affiliate program in January 2026, also operating under the alias Golden Community, and recr…