Threats Tagged 't1537'

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.

MediumCampaignUnited StatesUnited KingdomCanada+8#device code phishing#token harvesting#microsoft 365

This article explores the misuse of QR codes in phishing attacks, focusing on three key areas: QR codes with URL shorteners concealing malicious destinations, in-app deep links used to steal credentials and control victims' apps, and QR codes bypassing app store security via direct malicious app downloads. The research reveals an average of 11,000 daily detections of malicious QR codes, with financial services being the most targeted industry. Attackers are leveraging QR code shorteners, in-app deep links, and direct downloads to evade security controls and exploit users' trust in QR codes. The article highlights specific attack scenarios, including account takeovers through messaging apps and distribution of suspicious gambling apps.

MediumMalwareUkraine#phishing#mobile security#url shorteners

Threat actors associated with ShinyHunters-branded extortion operations are expanding their tactics, targeting cloud-based SaaS applications for data theft and extortion. The attackers use sophisticated voice phishing and credential harvesting to gain initial access, then exfiltrate sensitive data from various platforms. They employ aggressive extortion tactics, including harassment and DDoS attacks. The activity involves multiple threat clusters (UNC6661, UNC6671, UNC6240) and targets a growing number of cloud platforms. The attackers leverage social engineering to bypass MFA and use tools like ToogleBox Recall to cover their tracks. This activity highlights the effectiveness of social engineering and the importance of phishing-resistant MFA methods.

MediumCampaignGermanyFranceUnited Kingdom+4#saas#vishing#ddos

A campaign targeting Russian corporate entities, particularly HR, payroll, and administrative departments, has been uncovered. The attack uses realistic decoy documents themed around employee bonuses and financial policies. The malware ecosystem involves a malicious LNK file leading to an implant dubbed DUPERUNNER, which then loads the AdaptixC2 Beacon to connect to the threat actor's infrastructure. The infection chain begins with a spear-phishing ZIP archive containing PDF-themed LNK files. The DUPERUNNER implant, programmed in C++, performs various functions including downloading and opening decoy PDFs, process enumeration, and shellcode injection. The final stage involves the AdaptixC2 Beacon, which communicates with the command-and-control server. The campaign, tracked as UNG0902, uses multiple malicious infrastructures and is believed to be targeting employees of various organizations.

MediumMalwareRussiaGermanyUnited Kingdom+5#spear-phishing#c2 communication#process injection

The ransomware group Qilin has been highly active in 2025, publishing over 40 victim cases per month on its leak site. Manufacturing, professional services, and wholesale trade are the most affected sectors. Attackers likely originate from Eastern Europe or Russian-speaking regions. They use tools like Cyberduck for data exfiltration and leverage notepad.exe and mspaint.exe to view sensitive information. The attack flow includes initial VPN access, reconnaissance, credential theft, lateral movement, and ransomware deployment. Two encryptors are often used: one spread via PsExec and another targeting network shares. The ransomware encrypts files, deletes backups, and leaves ransom notes. Persistence is achieved through scheduled tasks and registry modifications.

MediumMalwareFranceGermanyItaly+6#manufacturing#ransomware#systembc

The article discusses the evolution of cryptojacking, from its rise with Coinhive in 2017 to its apparent decline and subsequent resurgence in a more sophisticated form. A new campaign was discovered involving over 3,500 infected websites, using stealthy techniques to mine cryptocurrency without detection. The modern approach involves dropper scripts, environment checks, worker spawning, and C2 communication, prioritizing stealth over resource consumption. This new wave of cryptojacking attacks demonstrates the ongoing cat-and-mouse game between attackers and security measures, highlighting the need for continued vigilance in cybersecurity.

MediumCampaignGermanyFranceUnited Kingdom+4#cryptojacking#webassembly#monero

UNG0901, a threat group targeting Russian aerospace and defense sectors, has been discovered conducting a spear-phishing campaign against the Voronezh Aircraft Production Association. The operation, dubbed 'CargoTalon', utilizes a custom DLL implant called EAGLET, which is disguised as a ZIP file containing transport documents. The infection chain involves a malicious LNK file that executes the EAGLET implant, which then establishes communication with a command-and-control server for remote access and data exfiltration. The campaign employs sophisticated tactics, including decoy documents related to Russian logistics operations, and shows similarities with another threat group known as Head Mare. The attackers' motivation appears to be espionage against Russian governmental and non-governmental entities.

MediumMalwareRussiaGermanyFrance+4#spear-phishing#dll implant#aerospace