APT

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This article exposes the malicious activities of Group 123 during 2017. We assess with high confidence that Group 123 was responsible for six campaigns targeting both Korean and Non-Korean institutions.

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Virus Bulletin conference is a well regarded intimate technical conference focused on malware research. It provides a good balance between listening to technical talks and spending time exchanging experiences with colleagues from different companies; all working on the same task of making our computing environments more secure. This past October, Talos participated at the Virus […]

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This post was authored by Warren Mercer, Paul Rascagneres and with contributions from Jungsoo An. Earlier this year, Talos published 2 articles concerning South Korean threats. The first one was about the use of a malicious HWP document which dropped downloaders used to retrieve malicious payloads on several compromised websites. One of the website was a compromised government website. We […]

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This post was authored by Warren Mercer, Paul Rascagneres and Vitor Ventura INTRODUCTION Cisco Talos discovered a new malicious campaign from the well known actor Group 74 (aka Tsar Team, Sofacy, APT28, Fancy Bear…). Ironically the decoy document is a flyer concerning the Cyber Conflict U.S. conference organized by the NATO Cooperative Cyber Defence Centre of Excellence on 7-8 November 2017 […]

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This blog was authored by Paul Rascagneres Executive Summary We recently wrote about the KONNI Remote Access Trojan (RAT) which has been distributed by a small number of campaigns over the past 3 years. We have identified a new distribution campaign which took place on 4th July. The malware used in this campaign has similar […]

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Summary The Nyetya attack was a destructive ransomware variant that affected many organizations inside of Ukraine and multinational corporations with operations in Ukraine. In cooperation with Cisco Advanced Services Incident Response, Talos identified several key aspects of the attack. The investigation found a supply chain-focused attack at M.E.Doc software that delivered a destructive payload disguised […]

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Talos has discovered an unknown Remote Administration Tool that we believe has been in use for over 3 years. During this time it has managed to avoid scrutiny by the security community. The current version of the malware allows the operator to steal files, keystrokes, perform screenshots, and execute arbitrary code on the infected host. […]

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If you had asked me a few years ago, I might have predicted that the rise of large scale hacking and network-based Advanced Persistent Threats (APTs) would spell the end...

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Advanced malware is dynamic, elusive, and evasive. Once it slithers into the organization’s extended network, it can very quickly proliferate, cause problems, and remain undetected by traditional point-in-time security tools. These tools poll or scan endpoints for malware or indicators of compromise at a moment in time, and then do not evaluate again until the […]