Threat actors have been observed leveraging malicious dropper apps masquerading as legitimate applications to deliver an Android SMS stealer dubbed Wonderland in mobile attacks targeting users in Uzbekistan. "Previously, users received 'pure' Trojan APKs that acted as malware immediately upon installation," Group-IB said in an analysis published last week. "Now, adversaries increasingly deploy droppers disguised as legitimate applications. The dropper looks harmless on the surface but contains a built-in malicious payload, which is deployed locally after installation – even without an active internet connection." Wonderland (formerly WretchedCat), according to the Singapore-headquartered cybersecurity company, facilitates bidirectional command-and-control (C2) communication to execute…