from Sepia@mander.xyz to cybersecurity@infosec.pub on 27 Jun 15:55
https://mander.xyz/post/54278744
cross-posted from: mander.xyz/post/54278068
A Chinese-speaking advanced persistent threat (APT) actor has been linked to a new custom backdoor called TinyRCT as part of cyber attacks aimed at government entities and critical infrastructure in Southeast Asia.
The activity, particularly aimed at state-owned enterprises in the energy and government sectors, has been attributed to a threat actor called CL-STA-1062, which Palo Alto Networks Unit 42 said shares overlaps with UAT-7237, a hacking group that was first flagged by Cisco Talos in August 2025 in relation to a campaign directed against web infrastructure entities in Taiwan.
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In one campaign detected in September 2025, the threat actor is said to have infiltrated a Southeast Asian government entity and deployed a web shell to exfiltrate data from an MS SQL server. During the same attack, the threat actors have been found to conduct network reconnaissance on a separate government entity in the same country.
“This suggests an effort to identify lateral movement opportunities and broaden their access. In one case, we observed the attacker staging and exfiltrating an entire directory of web server source code from the government entity,” Unit 42 said, adding it detected the breach of at least 10 different organizations in Southeast Asia between October and December 2025.
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