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Frankenstein Variant of the ToneShell Backdoor Targeting Myanmar

ID: 55ae30b9-9b8a-5764-9c19-9d22fc918c4e

STIX ID: report--55ae30b9-9b8a-5764-9c19-9d22fc918c4e

Feed Name: Intezer Blog

Threat Score
85/100

Date Published: 2025-09-10

Date Updated: 2026-04-28

Author: Nicole Fishbein

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Executive summary: This report provides a technical analysis of a ToneShell backdoor variant used by Mustang Panda, detailing delivery via DLL sideloading, persistence (AppData and scheduled task), extensive anti-analysis/stalling techniques, GUID and FakeTLS-like C2 protocol behavior, and IOCs (file/archive SHA256 hashes and C2 146.70.29.229:443), noting continued targeting of Myanmar and recommending ongoing threat hunting.

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