Chinese Cyber Espionage Group APT10 Delivers UPPERCUT Backdoor Via Malicious Word Documents

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The new version of UPPERCUT backdoor contains a number of improvements in turns of sending and receiving HTTP response and with the hashing algorithm. APT10 consistently targets the same geolocation and industry and the malware evolves continuously, the most significant change is in the way backdoor initializes the Blowfish encryption key, which makes it harder for analysts to detect and decrypt the backdoor’s network communications.

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