Hackers Exploiting PDF24 App to Deploy Stealthy PDFSIDER Backdoor

Resecurity has identified PDFSIDER malware that exploits the legitimate PDF24 App to covertly steal data and allow remote access. Learn how this APT-level campaign targets corporate networks through spear-phishing and encrypted communications...

GhostContainer backdoor: malware compromising Exchange servers of high-value organizations in Asia

In a recent incident response IR case, we discovered highly customized malware targeting Exchange infrastructure within government environments. Analysis of detection logs and clues within the sample suggests that the Exchange server was likely compromised via a known N-day vulnerability. Our...

OneClik: A ClickOnce-Based APT Campaign Targeting Energy, Oil and Gas Infrastructure

OneClik: A ClickOnce-Based Red Team Campaign Simulating APT Tactics in Energy Infrastructure By Nico Paulo Yturriaga and Pham Duy Phuc · Updated : June 30, 2025 The Trellix Advanced Research Center previously uncovered what appeared to be a sophisticated APT malware campaign, which we dubbed...

Earth Krahang APT Campaign Targeting Global Governments

Summary: Earth Krahang, an APT campaign since 2022, targets global government entities, employing spear phishing and server exploitation tactics. Operating independently but with potential links to Chinese threat actors, it utilizes malware like Cobalt Strike and XDealer for espionage, urging...

Earth Krahang Exploits Intergovernmental Trust to Launch Cross-Government Attacks

Since early 2022, we have been monitoring an APT campaign that targets several government entities worldwide, with a strong focus in Southeast Asia, but also seen targeting Europe, America, and Africa...

Tenacity 2.0 – Emulating Threat groups

Introduction The previous article: Tenacity – An Adversary Emulation Tool for Persistence, walked us through the working of Tenacity, techniques it supports, and how it can help organizations and individuals to validate the risk posture. As with the second installment of the series, this post wil...

SAS 2021: Operation Software Concepts

During the Operation Software Concepts: A Beautiful Envelope for Wrapping Weapon talk on SAS-at-Home 2021, Rintaro Koike, Shogo Hayashi and Ryuichi Tanabe from NTT Security Japan will cover a new APT campaign named Operation Software Concepts. They will share details about this multi-stage attack...

TrickBot Returns with a Vengeance, Sporting Rare Bootkit Functions

The TrickBot malware has morphed once again, this time implementing functionality designed to inspect the UEFI/BIOS firmware of targeted systems. It marks a serious resurgence following an October takedown of the malware’s infrastructure by Microsoft and others. The Windows Unified Extensible...

Industrial Cyberattacks Get Rarer but More Complex

Cyberattacks against the oil and gas industry inched up only slightly compared to the second half of 2019. Security experts say they are encouraged by the anemic growth, but at the same time are expressing concern that attacks are now becoming more potent, targeted and complex. According to new...

Platinum is back

In June 2018, we came across an unusual set of samples spreading throughout South and Southeast Asian countries targeting diplomatic, government and military entities. The campaign, which may have started as far back as 2012, featured a multi-stage approach and was dubbed EasternRoppels. The acto...

Charming Kitten Iranian Espionage Campaign Thwarts 2FA

A range of political and civil society targets are under fire in an APT attack dubbed the Return of Charming Kitten. The campaign has been tailored to get around two-factor authentication in order to compromise email accounts and start monitoring communications. According to researchers at Certfa...

Gazer: A New Backdoor Targets Ministries and Embassies Worldwide

Security researchers at ESET have discovered a new malware campaign targeting consulates, ministries and embassies worldwide to spy on governments and diplomats. Active since 2016, the malware campaign is leveraging a new backdoor, dubbed Gazer, and is believed to be carried out by Turla advanced...

Epic Operation Kicks Off Multistage Turla APT Campaign

The Turla APT campaign has baffled researchers for months as to how its victims are compromised. Peaking during the first two months of the year, Turla has targeted municipal governments, embassies, militaries and other high-value targets worldwide, with particular concentrations in the Middle Ea...

Crouching Yeti APT Campaign Stretches Back Four Years

A new analysis of a long-term APT campaign targeting manufacturers, industrial, pharmaceutical, construction and IT companies in several countries has uncovered fresh details of the attack, including identification of nearly 3,000 victims and the unmasking of the command-and-control infrastructur...

Miniduke APT Campaigh Returns with New Targets, Hacking Tools

The Miniduke advanced persistent threat APT campaign uncovered by researchers at Kaspersky Lab and CrySys Lab in February 2013 is back after a year-long hiatus in which attacks abated almost entirely. While the initial Miniduke operations primarily targeted government organizations in Europe, thi...

New APT Campaign Dubbed The Mask Called Most Sophisticated Seen to Date

PUNTA CANA–A group of high-level, nation-state attackers has been targeting government agencies, embassies, diplomatic offices and energy companies with a cyber-espionage campaign for more than five years that researchers say is the most sophisticated APT operation they’ve seen to date. The attac...

Researchers See Spike in Attacks Against Uyghur Users

Researchers have noticed a spike in cyberattacks over the past few weeks targeting the Uyghur people, a Turkic ethnic group based primarily in China and Kazakhstan. The attacks have been exploiting a Microsoft Word vulnerability patched in June 2009, according to a Securelist post by Kaspersky La...