Threats Tagged 't1185'

CVE-2026-81578 is a high-severity authentication bypass vulnerability in PaperCut MF/NG that enables attackers to impersonate legitimate users and obtain authentication tokens. The vulnerability was exploited in a sophisticated phishing campaign named GhostCode, which used device code phishing via web contact forms and abused Microsoft's OAuth 2.0 device authorization grant flow. Attackers used obfuscated, password-protected HTML files and residential proxy rotation to evade detection and harvest credentials. The campaign involved registering attacker-controlled devices and harvesting emails shortly after victim authentication.

Brazilian banking malware operation REF9334 has been deploying KREMLIN toolkit since May 2025, targeting Brazilian financial institutions through malicious browser extensions. The operation uses multi-stage JavaScript loaders, custom C++ installers, and exploits Chromium integrity mechanisms by manipulating Secure Preferences and regenerating required HMACs. Infrastructure leverages Ethereum smart contracts as dead-drop resolvers for dynamic C2 configuration. Seven distinct campaigns over 15 months show evolution from PULSAR RAT to REMCOS RAT delivery. Attackers impersonate twelve Brazilian banks through Portuguese-language lures, with transaction patterns clustering during São Paulo working hours. The malicious extensions intercept credentials, session tokens, and sensitive banking data through keylogging and request interception capabilities. Over 1,500 infections have been temporarily disrupted through network canary registration, with 98.75% of victims located in Brazil.

MediumMalwareBrazil#kremlin#browser extension#ethereum dead-drop

Cybercriminals have created numerous fake websites mimicking Bitrefill, a legitimate cryptocurrency-based gift card and eSIM retailer. These fraudulent sites appear in search engine results and use lookalike domains incorporating the Bitrefill brand name with added words or character substitutions, including internationalized domain names using Punycode. Victims are guided through convincing checkout processes that replicate Bitrefill's legitimate payment flow, complete with cryptocurrency options, QR codes, and countdown timers. However, payments are sent directly to attacker-controlled cryptocurrency addresses rather than Bitrefill, with virtually no chance of recovery. The operation demonstrates sophisticated measurement using commercial analytics software to optimize conversion rates, indicating organized criminal activity rather than opportunistic fraud.

A cybercriminal group dubbed GrelosGTM has been exploiting Google Tag Manager's legitimate functionality to compromise e-commerce websites. First detected in early April 2020, the group evolved their tactics by February 2021 to inject malicious Google Tag Manager scripts into targeted sites. The campaign affected at least seven websites running Magento CMS across Belgium, Italy, the United Kingdom, and the United States. Attackers inject custom Google Tag Manager scripts that load multi-stage JavaScript payloads through WebSocket connections. The final payload deploys a heavily obfuscated JavaScript sniffer designed to steal customers' payment card information during checkout using fake payment forms, with stolen data exfiltrated to attacker-controlled servers.

MediumMalwareUnited StatesBelgiumItaly+1#e-commerce attacks#javascript sniffer#web skimming

A malicious browser extension called 'Twitch Enhanced Viewer | JeetBot' distributed on Chrome Web Store and Firefox Add-ons captures and forwards users' live Twitch OAuth session tokens to Russian-controlled proxy servers. The extension, with approximately 30,000 Chrome users and 552 Firefox users, markets itself as a quality-of-life tool for blocking ads and unlocking streams. While delivering these features, it secretly extracts users' account-scoped OAuth tokens and forwards them as query parameters to operator-controlled infrastructure. Current versions append tokens inline during video playlist redirects, while earlier builds explicitly POSTed tokens to dedicated collection endpoints. The operator is identified as a commercial Russian bot service called JeetBot, with infrastructure hosted across German and cloud providers.

In August 2026, a Casbaneiro campaign targeted Latin American users through phishing emails and PDFs themed as fake invoices and legal notices. The multi-stage infection chain includes HTA downloaders and AutoIt loaders, employing geofencing to filter victims by IP address location. The malware exhibits sophisticated evasion techniques, including distributed data-receiving servers, deliberate HTTP 403 responses, and activation only when victims access targeted banking websites. Casbaneiro steals email data, performs clipboard injection, and creates fake windows for fraudulent activities. The campaign specifically targets Argentina, Peru, Colombia, and Mexico while avoiding German, French, and English language systems. The malware splits stolen data across multiple servers and uses malformed HTTP packets to complicate detection and analysis efforts.

MediumMalwareArgentinaColombiaMexico+1#casbaneiro#autoit loader#banking trojan

A massive cybercrime campaign tracked as CL-CRI-1171 has operated undetected for at least two years, utilizing a pay-per-install marketplace to distribute multiple malware families. The operation targeted primarily young gamers through YouTube channels with hundreds of thousands of followers, while simultaneously using SEO poisoning to compromise corporate endpoints including critical infrastructure and government entities. The campaign employed OfferLoader, a custom loader capable of delivering unique payload combinations through sophisticated gating mechanisms. Three distinct malware families were identified: Insomnia RAT, a cross-platform backdoor targeting Windows and macOS; ARKTunnel, a WebSocket tunneling tool hidden via steganography; and Docro Hijacker, a Chrome browser hijacker. Over 10,000 distinct loader samples were discovered, indicating a much larger deployment campaign affecting numerous organizations globally.

An emerging infostealer tracked as REVSTEALER under REF2859 has gained significant momentum with approximately 4,700 samples identified over the past year. The malware features comprehensive credential harvesting capabilities targeting browsers, VPN applications, password managers, cryptocurrency wallets, and gaming platforms. It incorporates sophisticated anti-analysis mechanisms including a weighted sandbox scoring system and uses Polygon blockchain-based dead drops for resilient infrastructure management. Distribution occurs primarily through social engineering campaigns targeting gamers via compromised YouTube channels advertising fake game cheats, though samples also impersonate legitimate software like Slack and qBittorrent. The malware delivers four additional modules extending capabilities to include wallet theft, clipboard manipulation, reverse proxy functionality, and cryptocurrency mining deployment. Most samples employ VMProtect packing and feature an App-Bound Encryption bypass using debugger-...

A previously undocumented Linux toolkit has been targeting South Korean automotive and media organizations with minimal detection since early 2025. The campaign employs a HAProxy instance called ted backdoor, compiled within the victim's existing HAProxy version 2.8.12, alongside trojanized versions of crond, agetty, atd, sshd, and polkitd. This sophisticated framework enables remote command execution, malicious script injection into web traffic, credential harvesting, and long-term surveillance. The ted backdoor uses HAProxy's native filter API and internal structures to intercept SSL-decrypted HTTP traffic while maintaining legitimate load balancing operations. Operating alongside are an SSH keylogger, a curl-based RAT with HAProxy health monitoring capabilities, and a deployment stager. The toolkit is attributed with medium confidence to DPRK APTs based on targeting patterns, simple XOR-based encryption schemes, custom substitution ciphers, and C2 infrastructure associated with APT37.

MediumMalwareSouth Korea#haproxy#curlrat#trojanized binaries

Type confusion in V8 in Google Chrome prior to 152.0.7977.82 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)

HighVulnerabilityUnited States#cve#cve-2026-85046#gemstone