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THE DAILY INDEX

Technology, AI, software, security, crypto and business

ATTACKS & VULNERABILITIES

TLDR InfoSec

SCATTERBRAIN: UNMASKING THE SHADOW OF POISONPLUG'S OBFUSCATOR

Since 2022, Google Threat Intelligence Group (GTIG) has been tracking a group of malware samples that use the PoisonPlug moniker and employ a complex obfuscator. The ScatterBrain obfuscator operates in three different protection modes which determine to what extent it obfuscates the control flow graph, mutates instructions, and protects the binary's import table. The post walks through how GTIG reverse engineered this obfuscator and created a deobfuscator tool.

A NETWORK THREAT HUNTER'S GUIDE TO C2 OVER QUIC

QUIC is a newer network communication protocol that abbreviates the typical TCP 3-way handshake as well as adding other features such as a Communication ID for persistent connections. This post introduces the QUIC protocol and then sets up a lab environment to analyze the Merlin QUIC-based C2 with different sets of delays. The post finds that the Merlin C2 can be detected by RITA with any delay, alternatively, Zeek logs can be examined for unusually persistent QUIC connections, and finally, the post also noted a unique QUIC handshake that is only exhibited by Merlin.

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