AdaptixC2
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Researchers: Russian-linked group used Hyper-V to hide Alpine VM and bypass endpoint security
Bitdefender and Georgia CERT say Curly COMrades abused Hyper-V to run a hidden Alpine VM hosting custom implants CurlyShell and CurlCat, bypassing endpoint security and using host networking to mask malicious traffic; researchers published IoCs on GitHub.
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Microsoft finds SesameOp backdoor that uses OpenAI Assistants API for C2
Microsoft’s DART reported discovery of a custom .NET backdoor called SesameOp that uses the OpenAI Assistants API as a covert command-and-control channel; Microsoft shared its findings with OpenAI, which disabled a suspected API key, and the victim remains unnamed.
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North Korea‑linked Kimsuky uses HttpTroy backdoor in spear‑phishing attack on South Korea
Security vendor Gen Digital said DPRK‑linked Kimsuky used a ZIP‑based spear‑phishing lure to deliver a three‑stage malware chain culminating in a new HttpTroy backdoor that provides extensive remote control and uses layered obfuscation.
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Open-source C2 Framework AdaptixC2 Draws Use by Groups Linked to Russian Ransomware
AdaptixC2, an open-source command-and-control framework published on GitHub, has been adopted by multiple threat actors, including groups linked to Russian ransomware, prompting analysis from Palo Alto Networks Unit 42 and an investigation by Silent Push into the project’s author and Telegram activity.
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Trend Micro: SORVEPOTEL self‑propagating malware spreads via WhatsApp, hits Brazil hard
Trend Micro researchers said a self‑propagating malware campaign called SORVEPOTEL is spreading via WhatsApp and email to Windows desktops, concentrating in Brazil; it propagates through malicious ZIP attachments and PowerShell, aims for rapid spread rather than data theft, and has led to mass spam and account suspensions.
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Malicious Rust crates impersonating fast_log steal Solana and Ethereum wallet keys, researchers say
Cybersecurity researchers say two malicious Rust crates impersonating the fast_log logging library were used to harvest Solana and Ethereum wallet keys from source code, with Crates.io removing the packages and preserving logs for analysis after responsible disclosure.
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SEO-poisoning BadIIS malware tied to Operation Rewrite targets East and Southeast Asia, researchers say
Security researchers say a Chinese-speaking actor is using the BadIIS malware in an Operation Rewrite SEO-poisoning campaign to hijack search results via a compromised IIS proxy, targeting East and Southeast Asia with Vietnam as a focus.
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ESET: Gamaredon and Turla Coordinating Campaign Targets Ukrainian Institutions, Deploying Kazuar Backdoor
Security researchers have identified a coordinated campaign between Gamaredon and Turla targeting Ukrainian entities, with Kazuar backdoor deployments signaling active collaboration and evolving tactics across multiple campaigns in early 2025.
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CountLoader: New Russian-linked malware loader broadens post-exploitation toolkit, researchers warn
Cybersecurity researchers have identified CountLoader, a new malware loader used by Russian ransomware groups to deliver post-exploitation tools such as Cobalt Strike, AdaptixC2, and the PureHVNC RAT. The loader, observed in variants across .NET, PowerShell, and JavaScript, targets Ukrainian users with PDF phishing lures and features a BrowserVenom proxy capability, multiple download/execution methods, and a…
