tl;dr

• Dynamically resolved hashed API
• Tls_call_back based anti-debug check
• AntiDebugFlag check implemented using ProcessInformationClass
• AES_CBC decryption of image to find flag

tl;dr

• The dump has some encrypted functions
• The encrypted bytes are being xorred with a 32 byte key
• Find the xor_key in the dump
• Use xor_key offset to find the offset of AES_key and iv
• AES_CBC decrypt to find flag