{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/shellcode/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["high"],"_cs_tags":["shellcode","windows","jit","defense-evasion"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eA newly developed shellcode loader, referred to as \u0026ldquo;Lucky Pasta\u0026rdquo;, has been published online, showcasing advanced evasion techniques targeting Windows systems. The loader, written in C and utilizing the Windows API, is designed to bypass traditional antivirus (AV) solutions through a combination of runtime shellcode decryption using a Just-In-Time (JIT) approach, obfuscation of strings indicative of malicious intent, dynamic loading of libraries commonly flagged as suspicious, execution of shellcode within fibers for stealth, and runtime patching of Advanced Encryption Standard (AES) CPU instructions to thwart static analysis. The loader is capable of retrieving shellcode payloads via standard HTTP or encrypted HTTPS channels, indicating its potential use in various attack scenarios to deliver secondary payloads.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe shellcode loader is initially executed on a Windows system, likely through social engineering or exploitation of a software vulnerability.\u003c/li\u003e\n\u003cli\u003eThe loader dynamically resolves API calls required for its operation, such as those related to memory allocation and network communication (e.g., \u003ccode\u003eVirtualAlloc\u003c/code\u003e, \u003ccode\u003eLoadLibrary\u003c/code\u003e, \u003ccode\u003eGetProcAddress\u003c/code\u003e).\u003c/li\u003e\n\u003cli\u003eThe loader retrieves the encrypted shellcode from a remote server using HTTP or HTTPS protocols, potentially from a hardcoded URL.\u003c/li\u003e\n\u003cli\u003eThe encrypted shellcode is decrypted in memory using the JIT decryption routine, converting it into executable code.\u003c/li\u003e\n\u003cli\u003eThe loader creates a new fiber and transfers control to the decrypted shellcode within the fiber.\u003c/li\u003e\n\u003cli\u003eThe shellcode performs its intended malicious actions, such as establishing a reverse shell or injecting into another process.\u003c/li\u003e\n\u003cli\u003eThe loader cleans up any traces of its presence, such as zeroing out allocated memory regions.\u003c/li\u003e\n\u003cli\u003eThe final objective is to gain unauthorized access to the compromised system, exfiltrate sensitive data, or deploy additional malware.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful execution of the \u0026ldquo;Lucky Pasta\u0026rdquo; shellcode loader can lead to complete compromise of the target Windows system. Due to its evasion techniques, it can bypass standard AV detection. The use of HTTP/HTTPS for payload delivery allows it to operate from almost anywhere. Exploitation may lead to data theft, ransomware deployment, or use of the compromised system as a bot in a larger network.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor network traffic for processes making outbound HTTP/HTTPS requests to unusual or suspicious domains, as this is how the shellcode is retrieved (IOC table, network_connection log source).\u003c/li\u003e\n\u003cli\u003eImplement a process creation monitoring rule to detect processes that load suspicious libraries dynamically (e.g., \u003ccode\u003eLoadLibrary\u003c/code\u003e calls from unknown executables) to identify potential malicious loaders. (process_creation log source, Sigma rule)\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rules provided to detect shellcode execution via fibers and obfuscated strings. (process_creation log source, Sigma rule).\u003c/li\u003e\n\u003cli\u003eInspect processes that perform memory allocation with execute permissions (\u003ccode\u003eVirtualAlloc\u003c/code\u003e with \u003ccode\u003ePAGE_EXECUTE_READWRITE\u003c/code\u003e), especially if followed by network activity.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-03-24T12:00:00Z","date_published":"2026-03-24T12:00:00Z","id":"/briefs/2026-03-lucky-pasta-shellcode-loader/","summary":"A shellcode loader dubbed 'Lucky Pasta' employs JIT decryption, string obfuscation, dynamic library loading, fiber-based execution, and AES instruction patching to evade AV detection, retrieving shellcode via HTTP/HTTPS and executing it on Windows systems.","title":"Lucky Pasta Shellcode Loader for Windows","url":"https://feed.craftedsignal.io/briefs/2026-03-lucky-pasta-shellcode-loader/"}],"language":"en","title":"CraftedSignal Threat Feed — Shellcode","version":"https://jsonfeed.org/version/1.1"}