On April 11, 2026, researchers analyzed a CHM file (api_reference.chm) tagged as Kimsuky that initiated a three-stage attack chain. The C2 server at check[.]nid-log[.]com had directory listing enabled, allowing recovery of complete source code for all payload stages: a 6,338-byte VBScript performing system reconnaissance and establishing persistence via scheduled task, a 449-byte VBScript bridge to PowerShell, and a 6,234-byte PowerShell keylogger with clipboard monitoring and timed exfiltration. The infrastructure included 79+ domains across 5 C2 IPs spanning Korean VPS providers. The server responded with "Million OK !!!!" signature, matching previously documented Kimsuky infrastructure while showing upgraded Apache/PHP stack. The operation targeted Korean Naver users through credential phishing and tax authority impersonation, with infrastructure linked to previously documented Kimsuky campaigns via shared DAOU Technology subnets.
Storm-2755 is a financially motivated threat actor conducting payroll pirate attacks targeting Canadian employees. The campaign uses malvertising and SEO poisoning to redirect victims searching for terms like "Office 365" to fraudulent sign-in pages. By employing adversary-in-the-middle techniques, the attacker captures authentication tokens and session cookies, bypassing MFA protections. The actor maintains persistence by replaying stolen tokens and performs discovery to identify payroll and HR contacts. They impersonate compromised users to socially engineer HR staff or directly manipulate payroll systems such as Workday. Malicious inbox rules are used to hide attacker communications. These attacks have resulted in direct financial losses through redirected salary payments to attacker-controlled bank accounts.
A malicious campaign is targeting French-speaking users in an attempt to steal passwords, payment details and banking details from people across France, according to researchers at the Institute for Strategic Studies (ISS).
Tracked as UNC6783, the threat actor is likely linked to Mr. Raccoon, the hacker behind the alleged theft of Adobe data from a BPO. The post Google Warns of New Campaign Targeting BPOs to Steal Corporate Data appeared first on SecurityWeek .
On March 19, a researcher on X posted a suspicious Android APK tied to a phishing page impersonating Paidy, a Japanese buy-now-pay-later service. A quick look at the infrastructure behind it revealed an unauthenticated API sitting wide open, with endpoints exposing payloads, command logs, and the C2 source code itself. The server wasn't running a simple credential harvester. Agents for Android, iOS, Windows, Linux, and macOS were present, alongside a canvas-based device fingerprinting system and code that references iOS sandboxing mechanisms by name. The actor behind it is clearly comfortable with Japanese, and large portions of the codebase show signs of LLM-assisted development.
The APT28 threat group exploited vulnerabilities in TP-Link and MikroTik routers to perform adversary-in-the-middle (AitM) attacks involving DNS hijacking. This espionage operation was disrupted by US authorities. The attack leveraged compromised routers to intercept and manipulate network traffic. No specific affected versions or patches are detailed in the available information. There is no indication of known exploits currently active in the wild. The overall severity of this threat is assessed as medium based on the described impact.
A North Korean threat operation has published malicious packages across npm, PyPI, Go Modules, crates.io, and Packagist, impersonating legitimate developer tooling. The campaign uses GitHub aliases including golangorg and aokisasakidev to distribute staged malware loaders that contact actor-controlled infrastructure, retrieve payloads from Google Drive, and deliver platform-specific second-stage malware. The loaders are hidden behind normal-looking API functions in logging and utility libraries. Windows variants include full remote access trojans with capabilities for shell execution, keylogging, browser and wallet theft, sensitive file collection, and AnyDesk deployment. The operation demonstrates coordinated cross-ecosystem supply chain attacks with shared infrastructure patterns, reused extraction directories, and consistent staging logic across multiple programming languages.
FortiGuard Labs recently detected a series of LNK files targeting users in South Korea. These attacks use a multi-stage scripting process and leverage GitHub as Command and Control (C2) infrastructure to evade detection. Although these LNK files can be traced back to 2024, earlier versions had less obfuscation and contained significant metadata, allowing us to track similar attacks spreading the XenoRAT malware.
On March 31, 2026, a North Korean state actor hijacked the npm credentials of the primary Axios maintainer and published two backdoored releases that deployed a cross-platform remote access trojan (RAT) to Windows, macOS, and Linux systems. Axios is the most widely used HTTP client in the JavaScript ecosystem, with approximately 100 million weekly downloads and a presence in roughly 80% of cloud and code environments.
Endpoint detection and response (EDR) tools are widely deployed and far more capable than traditional antivirus. As a result, attackers use EDR killers to disable or bypass them. The malicious “msimg32.dll” used in Qilin ransomware attacks, which is a multi-stage infection chain targeting EDR systems. It can terminate over 300 different EDR drivers from almost every vendor in the market.
Active since September 2025, Yurei is a double extortion ransomware campaign. The operators run their own Tor data leak site with a low number of victims listed at the time of writing. It is reportedly derived from Prince Ransomware, an open-source ransomware family written in Go. Check Point researchers noted that all samples were first submitted to VirusTotal from Morocco, and that one sample did not include a ticket ID, indicating that this could be a test build, possibly uploaded by the developer themselves. Yurei ransomware samples also contained a link to SatanLockv2, based on the presence of the PDB path string “D:\satanlockv2” present in the Yurei samples.
Google Threat Intelligence Group (GTIG) is tracking an active software supply chain attack targeting the popular Node Package Manager (NPM) package "axios." Between March 31, 2026, 00:21 and 03:20 UTC, an attacker introduced a malicious dependency named "plain-crypto-js" into axios NPM releases versions 1.14.1 and 0.30.4. Axios is the most popular JavaScript library used to simplify HTTP requests, and these packages typically have over 100 million and 83 million weekly downloads, respectively. This malicious dependency is an obfuscated dropper that deploys the WAVESHAPER.V2 backdoor across Windows, macOS, and Linux.
Elastic Security Labs identified a supply chain compromise of the axios npm package, one of the most depended-upon packages in the JavaScript ecosystem with approximately 100 million weekly downloads. The attacker compromised a maintainer account and published backdoored versions that delivered a cross-platform Remote Access Trojan to macOS, Windows, and Linux systems through a malicious postinstall hook.
Xloader is an information stealing malware family that evolved from Formbook and targets web browsers, email clients, and File Transfer Protocol (FTP) applications. Additionally, Xloader may execute arbitrary commands and download second-stage payloads on an infected system. The author of Xloader continues to update the codebase, with the most recent observed version being 8.7. Since version 8.1, the Xloader developer applied several changes to the code obfuscation. The purpose of this blog is to describe the latest obfuscation methods and provide an in-depth analysis of the network communication protocol. We highly recommend reading our previous blogs about Xloader in order to get a better understanding of the malware’s internals.
On March 31, NSFOCUS CERT detected that the npm repository of the HTTP client library Axios was poisoned by the supply chain. The attacker bypassed the normal GitHub Actions CI/CD pipeline of the project, changed the account email address of the axios maintainer to an anonymous ProtonMail address, and manually released a malicious version with a Trojan backdoor through the npm CLI. When the user installs it, a persistent remote control will be established on the host. The impact is wide-ranging, and relevant users are requested to take measures for investigation and protection as soon as possible.
This is the fifth update to the TeamPCP supply chain campaign threat intelligence report, "When the Security Scanner Became the Weapon" (v3.0, March 25, 2026). Update 004 covered developments through March 30, including the Databricks investigation, dual ransomware operations, and AstraZeneca data release. This update consolidates two days of intelligence through April 1, 2026.
A sophisticated malware campaign targeting WhatsApp users has been observed since February 2026. The attack chain begins with malicious Visual Basic Script files sent via WhatsApp messages, which, when executed, initiate a multi-stage infection process. The malware uses renamed Windows utilities, retrieves payloads from trusted cloud services, and installs malicious MSI packages. The campaign employs social engineering, stealth techniques, and cloud-based payload hosting to establish persistence and escalate privileges on victim systems. The attackers utilize legitimate tools and trusted platforms to reduce visibility and increase the likelihood of successful execution. The final stage involves the delivery of unsigned MSI installers that enable remote access to compromised systems.
A coordinated supply chain attack targeted the axios npm package, compromising two versions (1.14.1 and 0.30.4) by injecting a malicious dependency. The attack delivered a cross-platform Remote Access Trojan to macOS, Windows, and Linux systems. The compromise occurred through the lead maintainer's npm account, bypassing normal publishing workflows. The malicious payload performed system reconnaissance, established persistence on Windows, and provided remote access capabilities. The attack affected numerous organizations and potentially exposed sensitive credentials. Immediate mitigation steps include pinning to safe versions, removing malicious dependencies, rotating credentials, and blocking the command and control server.
EvilTokens is a new Phishing-as-a-Service offering a turnkey Microsoft device code phishing kit. It enables attackers to harvest access and refresh tokens, granting unauthorized access to victims' Microsoft accounts. The kit supports post-compromise operations, allowing data exfiltration from various Microsoft services. EvilTokens has been rapidly adopted by cybercriminals since March 2026, impacting organizations globally. The service provides advanced capabilities for account takeover, including token conversion to Primary Refresh Tokens and browser cookies for persistent access. Phishing campaigns using EvilTokens target employees in finance, HR, logistics, and sales, primarily for Business Email Compromise attacks.
GhostSocks is an emerging threat that turns compromised devices into residential proxy nodes, enabling attackers to evade detection. Originally marketed on Russian underground forums as Malware-as-a-Service, it has gained popularity due to its partnership with Lumma Stealer. Written in GoLang, GhostSocks uses SOCKS5 proxy protocol and TLS encryption to blend malicious traffic into normal network activity. It also incorporates backdoor functionality for running arbitrary commands and deploying additional payloads. Darktrace observed an increase in GhostSocks activity, detecting it alongside Lumma Stealer in customer networks. The malware's versatility in converting devices into proxy nodes while enabling covert network access illustrates how threat actors maximize the value of compromised infrastructure.
