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Check Point Research

Check Point Research has uncovered Silver Dragon, a sophisticated Chinese-aligned APT group with operational ties to APT41, targeting government entities in Southeast Asia and Europe. The group uses three infection chains: AppDomain hijacking via MonikerLoader, Service DLL hijacking via BamboLoader, and phishing with malicious LNK files. All chains ultimately deliver Cobalt Strike beacons using DNS tunneling or HTTP for C2. A novel backdoor called GearDoor uses Google Drive as its C2 channel, communicating entirely through file extensions in a dedicated Drive folder per victim. Additional tools include SilverScreen (covert screen capture implant) and SSHCmd (.NET SSH utility). Attribution indicators include script similarities to Mandiant-documented APT41 campaigns, shared Cobalt Strike watermarks, RC4+LZNT1 shellcode decryption chains common in Chinese APT activity, and UTC+8 compilation timestamps. IoCs including C2 domains and file hashes are provided.

Silver Dragon Targets Organizations in Southeast Asia and Europe