Autumn Dragon China-Nexus APT Group Targets South East Asia Using Multi-Stage DLL Sideloading

    Date: 11/24/2025

    Severity: High

    Summary

    Since early 2025, China’s presence in the Indo-Pacific has become increasingly assertive. Activities have ranged from heightened maritime tensions to acting as a peacebroker for Myanmar’s junta. More recently, espionage efforts have targeted joint Philippine naval exercises with the US, Australia, Canada, and New Zealand. The attacker—likely a China-nexus threat actor—relies heavily on DLL sideloading to compromise chosen targets. Governments and media remain prime targets due to their influence on policy, public perception, and global alignment.

    Indicators of Compromise (IOC) List

    Domains\URLs :

    https://public.megadatacloud.com

    https://104.234.37.45

    Hash : 

    5b64786ed92545eeac013be9456e1ff03d95073910742e45ff6b88a86e91901b

    e409736eb77a6799d88c8208eb5e58ea0dcb2c016479153f9e2c4c3c372e3ff6

    50855f0e3c7b28cbeac8ae54d9a8866ed5cb21b5335078a040920d5f9e386ddb

    a3805b24b66646c0cf7ca9abad502fe15b33b53e56a04489cfb64a238616a7bf

    5d0d00f5d21f360b88d1622c5cafd42948eedf1119b4ce8026113ee394ad8848

    843fca1cf30c74edd96e7320576db5a39ebf8d0a708bde8ccfb7c12e45a7938c

    2044a0831ce940fc247efb8ada3e60d61382429167fb3a220f277037a0dde438

    c691f9de944900566b5930f219a55afcfc61eaf4ff40a4f476dd98a5be24b23c

    Gurucul Threat Detection and Incident Response (TDIR) Queries for Detection

    Detection Query 1 :

    domainname like "https://104.234.37.45" or url like "https://104.234.37.45" or siteurl like "https://104.234.37.45" or domainname like "https://public.megadatacloud.com" or url like "https://public.megadatacloud.com" or siteurl like "https://public.megadatacloud.com"

    Detection Query 2 :

    sha256hash IN ("5b64786ed92545eeac013be9456e1ff03d95073910742e45ff6b88a86e91901b","e409736eb77a6799d88c8208eb5e58ea0dcb2c016479153f9e2c4c3c372e3ff6","50855f0e3c7b28cbeac8ae54d9a8866ed5cb21b5335078a040920d5f9e386ddb","a3805b24b66646c0cf7ca9abad502fe15b33b53e56a04489cfb64a238616a7bf","5d0d00f5d21f360b88d1622c5cafd42948eedf1119b4ce8026113ee394ad8848","843fca1cf30c74edd96e7320576db5a39ebf8d0a708bde8ccfb7c12e45a7938c","2044a0831ce940fc247efb8ada3e60d61382429167fb3a220f277037a0dde438","c691f9de944900566b5930f219a55afcfc61eaf4ff40a4f476dd98a5be24b23c")

    Reference:    

    https://cdn.prod.website-files.com/68cd99b1bd96b42702f97a39/691bf999a544b31f93edb11d_b6dc80485a86c3eeaed906c7ecf0cd7b_Autumn%20Dragon_%20China-nexus%20APT%20Group%20Target%20South%20East%20Asia.pdf


    Tags

    Threat ActorAutumn DragonChina-NexusAPTAsiaChinaPhilippinesUnited StatesAustraliaCanadaNew ZealandDLL

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