A targeted malware campaign against U.S.government entities has been observed, utilizing a politically themed ZIP archive containing a loader executable and a malicious DLL. The DLL functions as a backdoor named LOTUSLITE, communicating with a hard-coded command-and-control server. The campaign demonstrates minimal technical sophistication but shows deliberate victim selection and use of geopolitical lures. Attribution analysis suggests moderate-confidence overlap with Mustang Panda tradecraft, including delivery style, loader-DLL separation, and infrastructure usage. The backdoor supports basic remote tasking and data exfiltration, indicating an espionage-focused capability. This activity reflects a trend of targeted spear phishing using geopolitical themes and reliable execution techniques like DLL sideloading.
CastleLoader, a versatile malware loader, has infected 469 devices since May 2025 using Cloudflare-themed ClickFix phishing and fake GitHub repositories. It delivers information stealers and RATs, with a 28.7% infection rate. The malware employs sophisticated techniques, including PowerShell and AutoIT scripts, to load shellcode into memory and connect to C2 servers. CastleLoader's modular design allows deployment of multiple payloads, including StealC, RedLine, NetSupport RAT, DeerStealer, HijackLoader, and SectopRAT. Its campaigns target U.S.government entities and use legitimate file-sharing services and compromised websites for payload retrieval, enhancing resilience against takedowns.
