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FortiGuard Labs reports an ongoing Ousaban campaign targeting the Iberian Peninsula. The actor keeps refining its delivery chain and uses geofencing and environmental checks to restrict access to the malware to the intended victims. Ousaban resolves its C2 IP through daily-changing domains and runs a traditional C2 setup as a decoy. Its l…
CISA added one vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog on 2026-10-01, citing evidence of active exploitation: CVE-2026-104286, a path traversal flaw in Fortinet FortiMail. CISA describes this vulnerability type as a frequent attack vector for malicious cyber actors and a significant risk to the federal enterpris…
FortiGuard Labs describes an intrusion in which a compromised Jenkins EC2 build host, tied to Shai Hulud persistence, was used to steal instance role credentials via IMDS and pivot into the victim's AWS environment. The actor used the credentials from external IPs, created an admin IAM user named cloudops-monitor, opened network paths to …
FortiGuard Labs analyzed a Casbaneiro banking trojan campaign targeting users in Latin America. The campaign applies access restrictions at several stages to keep the malware away from analysis tools: the download page, the HTA downloader and Casbaneiro itself. Casbaneiro sends different types of stolen data to separate servers and uses a…
FortiGuard Labs analyzed a SectopRAT variant that is embedded in legitimate software to evade detection. The malware uses a multi-stage loader to extract its payload from files, then applies API hashing, indirect function calls and in-memory loading to run the final .NET payload. Once running, it sets up encrypted communication with its C…
FortiGuard Labs describes a large-scale, global campaign that uses heavily obfuscated JScript droppers to launch an AutoIt/Lua-based loader with low detection rates. The loader delivers several popular RATs and infostealers, including a version of Snake Keylogger. The infection chain relies on business email compromise tactics, impersonat…
FortiGuard Labs describes an LLMjacking incident in which an AWS account was compromised through a leaked, long-lived IAM access key with AdministratorAccess permissions. The operator subscribed to one or more foundation models through AWS Marketplace and invoked them through Amazon Bedrock, generating inference charges against the victim…
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 …
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…
FortiGuard Incident Response reports a supply chain attack on the QuickFox Windows application, whose trojanized components deployed the FDMTP implant to users. QuickFox's user base is mainly Chinese international students and expats. Affected Windows versions are those later than v3.0.35 and earlier than v3.55.6. QuickFox has removed the…
In April 2026, Kaspersky GERT responded to an incident at a Middle East manufacturing organization where the actor gained domain admin-equivalent control of Active Directory. The actor created and linked a malicious GPO named PAYLOAD at the domain root. It pushed ransom notes, a wallpaper and lock screen, a logon banner and a local admini…
Russian firm Solar (a Rostelecom subsidiary) reported a nearly two-year intrusion at an unnamed Russian healthcare organization, attributed to the Belarus-aligned hacktivist cluster Partisan Zmiy (Cyber Partisans). Solar found the compromise in December 2025, but the earliest signs date to early 2024. Unlike the group's usual destructive …
Recorded Future's Insikt Group reports on TAG-193, a cluster that ran a sustained intelligence-collection campaign against government bodies from early 2025 through May 2026. Targets include diplomacy, economic development, agriculture and environmental agencies in Russia, Tajikistan, Belarus, Armenia and Uzbekistan. Lure documents and im…
F5 Labs, using attack telemetry from Efflux's global sensor network, analyzed the most exploited vulnerabilities in July 2025 and found that nearly all top-scanned CVEs are HTTP-based RCE or command injection flaws in web interfaces. CVE-2017-9841 (PHPUnit) was the most exploited, followed by CVE-2023-1389 (TP-Link Archer AX21), CVE-2022-…
Unit 42 detailed a multi-stage intrusion in September 2024 against a telecommunications managed service provider, tracked as CL-STA-0954 (aka UNC5820). The attackers gained initial access by exploiting CVE-2024-47575 (FortiJump) on a central FortiManager and exfiltrated an archive with running configurations, credentials and private keys …
Silent Lynx, tracked as UAT-6275 by Cisco Talos and TAG-193 by Recorded Future Insikt Group, has been linked to a new set of attacks on government organizations across the Commonwealth of Independent States. The activity ran from June 2025 through August 2026 and used four infection chains to deploy custom reverse shells (FoalShell, Chvos…
Huntress researchers detailed an SEO-poisoning campaign on 13 October that harvests SSL VPN credentials through a lookalike WatchGuard download page, watchguard-vpn.net, and then delivers the legitimate, validly signed Mobile VPN with SSL installer. Earlier waves used trojanised installers, but this iteration contains no malware, so endpo…
F5 Labs, using Efflux sensor telemetry, reports on the most exploited CVEs of April 2025 and on internet-wide scanning for SparkRAT command-and-control servers. A single actor, using three IPs in DigitalOcean ASN 14061, sent identical HTTP POST requests to the SparkRAT in-place update endpoint, each IP scanning for about 13 hours and reac…
FortiGuard Labs describes Evooo1Bot, a Linux botnet that embeds the Mirai DDoS engine in a more modular and capable framework. It uses encrypted C2 communications, layered string obfuscation (AES-256-CTR, ChaCha20, XOR-based key derivation) and a 28-command remote administration interface. It also ships an integrated exploit arsenal again…
FortiGuard Labs describes ClingSTUN, a Linux back-connect proxy backdoor that keeps persistent access and turns compromised devices into remotely controlled proxy nodes. It combines persistence, process termination, watchdog manipulation and remote command execution. It also uses legitimate public STUN servers for NAT traversal, to discov…
