BITTER Expands Its Arsenal with PapRAT
FortiGuard Labs examines a BITTER cyberespionage campaign targeting South Asian organizations through three attack chains and the PapRAT remote access trojan
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Shutting the Door on the XCPE Botnet
Introduction Last week, Google and industry partners dismantled the XCPE backdoor which enrolled more than 1.3 million set-top boxes into a botnet. We assess with high confidence that the backdoor and botnet were intentionally developed, deployed, and operated for financial gain by Videostrong Technology Co., an Android Original Equipment Manufacturer (OEM) and Original Device Manufacturer (ODM). Videostrong monetized the backdoor by selling access to criminal affiliates and loading those…
CyberStrikeAI in the wild: the use of AI in real-world attacks on organizations
Introduction As part of proactive threat monitoring, Kaspersky’s Cyber Threat Intelligence team identified a malicious campaign involving C2 agents controlled by artificial intelligence. Confirmed victims of the campaign included organizations in the education sector in several countries across Africa and Latin America. CyberStrikeAI played a key role in the post-exploitation phase. This is an open-source framework in which an LLM orchestrator on the command-and-control server plans actions,…
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Appraisal by AI: Model-driven victim prioritization in the VOLTA infostealer
VOLTA is a mature stealer implant with an optional AI-integration layer. After stealing credentials, sessions, and cryptocurrency wallets, VOLTA sends a structured evidence bundle to an LLM to rank the victim’s assets by monetization value. If a model refuses to perform the target assessment, VOLTA fails over to a three-model chain, implying a direct engineering effort and expectation of hitting model guardrails. This stealer is self-deleting, and there is no attacker-owned infrastructure. The…
Inside a malicious Claude Code-branded extension and its persistent SSH backdoor
In this article Attack chain overview Attack chain Host reconnaissance collection SSH authorization and tunnel identities Protocol Tunneling (T1572): reverse SSH forwarding Platform-specific startup persistence Mitigation and protection guidance Immediate actions Remediation actions Follow-up Investigation and recovery Microsoft Defender XDR detections Threat intelligence reports Microsoft Defender XDR Threat analytics Advanced hunting queries MITRE ATT&CK techniques Indicators of compromise …
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Fake PDF and search tools hijacked searches for 13.4 million Chrome users
Ads promoted browser extensions as tools to find manuals, convert PDFs, or make searches safer. But many of these extensions sent users’ search queries through servers controlled by their operators. Socket researcher John Tuckner identified 319 extensions with an estimated 13.4 million installs over a decade. The extensions hijacked users’ default search settings and routed their searches through servers controlled by the operators before sending them to Yahoo or Bing. This gave the operators…
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ARTEX and Friends: Enter Agentic Offensive Frameworks
Written by: Aurora Blum, David Mainor, Rohit Nambiar, Omar ElAhdan, Matthew McWhirt, Will Silverstone, Bhavesh Dhake, Chris Busse Introduction Recent intrusions in which threat actors have been observed weaponizing agentic frameworks to execute highly-automated intrusions has put a spotlight on evolving adversarial use of LLMs. In our September 2026 report, Google Threat Intelligence Group (GTIG) noted that forward leaning adversaries were beginning to transition from basic prompting to agentic…
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Malicious Claude Code extension distributed through Cursor marketplace
Categories: Threat Research Tags: advisory, Cursor
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SPOJENO PŘES CVE Hackers exploit Cisco SD-WAN flaw to deploy custom KeyDrift malware
A newly identified advanced persistent threat (APT) group tracked as UAT-11473 was observed exploiting CVE-2026-20127, an authentication-bypass flaw in Cisco Catalyst SD-WAN Controllers, to deploy a custom malware framework called KeyDrift. [...]
KEV ✓ EPSS 0.89 CVE-2026-20127 Cisco obrana US EU FR
A quiet week in infosec <.<
Welcome to this week’s edition of the Threat Source newsletter. “The darkest period of my life, so far, arrived the summer I was pregnant with my eldest son. The future was growing in me with all of its terrifying unpredictability, and I found myself anxious, unable to work and woefully at sea.” — Lauren Groff I doubt Lauren had this maniacal infosec news cycle in mind when she wrote about the terrifyingly unpredictable future, but honestly, she’s got our current careers down cold. Let he who…
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SPOJENO PŘES CVE Aktivně zneužívané zranitelnosti v Citrix NetScaler
Upozorňujeme na aktivně zneužívané zranitelnosti CVE-2026-88771 a CVE-2026-88772 v produktu Citrix Netscaler, které umožňují vzdálené spuštění kódu. Doporučujeme bezodkladně aktualizovat na verzi 14.1-73.37, 13.1-64.23, 14.1-73.37 FIPS nebo 13.1-37.279 a novější podle používané produktové řady. Dále doporučujeme prověřit indikátory kompromitace, jelikož aktualizace nemusí kompromitaci odstranit. Zranitelnosti Zranitelnost CVE-2026-88771 spočívá v nesprávném ověřování vstupů a umožňuje…
KEV ✓ EPSS 0.82 CVSS 9.5 CVE-2026-88771 CVE-2026-88772 Citrix NetScaler veřejná správa finance školství CZ US HU GB FR IT SE
Malicious Firefox extensions impersonate popular crypto wallets
Socket’s threat researchers found three malicious Firefox extensions that impersonated the Phantom, Jupiter, and Bitget crypto wallets. Once installed, the malicious extensions stole recovery phrases and private keys, which would provide the attacker with full control of a wallet. A crypto wallet is an app, browser extension, or physical device that lets you manage cryptocurrency such as Bitcoin. Despite its name, it doesn’t actually hold your coins. Those are recorded on a blockchain, a shared…
NIK C2: The new AI-enabled command-and-control framework
Cisco Talos observed a new AI-integrated command-and-control (C2) framework in the wild called “NIK C2.” NIK C2 contains a Windows implant, using which, an actor can dump credentials, stream the victim's keystrokes to collect the targeted victim’s sensitive data, and instruct an integrated AI model to analyze the harvested data, all within the compromised session. In this framework, the actor has abused the OpenAI Chat Completions application programming interface (API), which is a HTTP…
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Unknown APT uses NetamLoader to attack a Win10 OS customized for governments in Asia
Introduction A couple of months ago, our research revealed a highly sophisticated infection chain and a complex .NET assembly-loading framework built on XAML markup, which strongly indicates a supply-chain attack targeting a custom Windows build used exclusively by government entities in Asia. The malicious framework has been labeled NetamLoader; at present, no attribution to any known APT group has been established. The sample came to light in the first half of 2026, when Kaspersky Security…
Amatera: How the prolific infostealer works and spreads
The malware that topped ESET’s infostealer detections in Latin America in the first half of 2026 is an example of how cybercrime has professionalized
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AI used in Aur0ra ransomware testing and execution
The GOLD OGRE threat group has used AI extensively to develop tools and to orchestrate and execute ransomware operations Categories: Threat Research Tags: AI, Ransomware, Aur0ra
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Yet Another ClickFix Campaign, (Wed, Oct 28th)
Introduction On Wednesday, 2026-10-28, I ran across a ClickFix campaign I haven't seen before. Like several other ClickFix campaigns, this one uses a fake Cloudflare verification page. It targets both macOS and Windows. I don't yet have a name for this specific activity, but this diary shares some screenshots and indicators. Unfortunately, I was unable to get the macOS or Windows malware distributed through this particular ClickFix campaign. Screenshots of the Activity Shown above: Fake…
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Managed for Malice: How Attackers Turn MDM into Remote Access
Attackers abuse legitimate MDM platforms to deploy rogue RMM tools, turning device management into a pathway for remote access and persistence.
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False Protection, Emptied Accounts: The Seven Android Trojan Families Targeting Indian Banking Apps
This technical analysis details a sophisticated Android malware campaign targeting the Indian banking sector. The report examines seven distinct trojan families that facilitate banking fraud through coordinated phishing, credential theft, and unauthorized cryptojacking. Group-IB provides an in-depth breakdown of the attack chain, malware capabilities, and the infrastructure used to compromise mobile devices.
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SPOJENO PŘES CVE CVE-2026-35273: SSRF to RCE in Oracle PeopleSoft
On September 25, 2026, Mandiant released a report regarding continued mass exploitation of CVE-2026-35273 by the ShinyHunters group. TrendAI’s Zero Day Initiative first reported this CVE to Oracle on June 10, 2026, following an investigation I conducted with Minh Giang and Lucas Miller of TrendAI Research. Although Oracle issued a patch under a single CVE, we reported three distinct vulnerabilities across multiple PeopleSoft components. We are coordinating with Oracle to assign separate CVEs…
KEV ✓ · ransomware EPSS 0.97 CVSS 9.8 CVE-2026-35273 Oracle Google Microsoft školství zdravotnictví doprava veřejná správa US
Tricks from the Past deployed via signed ChatGPT and Claude binaries
Key Points Check Point Research discovered a campaign we track as Yoba where attackers abuse the popularity of AI tools such as ChatGPT and Claude, creating fake GitHub projects that pretend to be desktop applications like GPT-5.6 Sol, GPT-6 Astra, and Claude Opus. The malware is placed next to legitimate, signed executables from OpenAI and Anthropic so it can be loaded indirectly, a technique commonly known as DLL sideloading, which is often used to bypass security protections. This campaign…
Camera Management Software Compromise Leads to Malware Deployment
Attackers compromised camera management software to deploy malware, establish persistence, and beacon to C2. Huntress breaks down the attack chain and IOCs.
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AI coding agents hijacked using AGENTS.md file in Downloads folder
Researchers found a malicious AGENTS markdown instruction file in a customer's Downloads folder that tricked an AI coding agent into installing a rogue npm package. [...]
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SPOJENO PŘES CVE BlackX UEFI bootkit exploits Baton Drop flaw to bypass Secure Boot
A new UEFI bootkit named BlackX, deployed in an espionage campaign in early 2026, exploited the old Baton Drop vulnerability to bypass Secure Boot and load a malicious driver designed to interfere with security solutions from Kaspersky and Avast. [...]
EPSS 0.09 CVE-2022-21894 Kaspersky Avast Microsoft veřejná správa US RU
Inside the LiteLLM 1.107.0 supply chain compromise: Credential theft through Python startup hooks
In this article Attack overview Technical details Mitigation and protection guidance Indicators of compromise References Learn More On October 21, 2026, a compromised LiteLLM 1.107.0 release was published to the Python Package Index (PyPI) and distributed through official container images. The malicious package added files that Python could execute during normal interpreter initialization. An application did not need to import LiteLLM for the payload to run: starting Python in an affected…
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Infostealer riding the AI Train
Key Points Aokigahara, a newly observed infostealer, has been spotted in the wild. An earlier version may have been known as Kamidere or Stygian. The malware includes traditional data theft capabilities targeting browsers, VPN clients, cryptocurrency wallets, FTP/SFTP clients, password managers, and email applications, among other targets. AI applications and development tools are notable targets. The stealer collects authentication files, session data, and configuration files associated with…
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SPOJENO PŘES CVE How CVE-2026-73570 turns a Zimbra log file into remote code execution
When we are building detections for various threats, we regularly run the exploits on representative systems to help us build high-quality rules. The Common Vulnerabilities and Exposures (CVE) entry CVE-2026-73570 for Zimbra is no exception. Zimbra is a widely used enterprise email and collaboration software platform, known for its SMTP platform, among other services. SMTP plays a critical role in the infrastructure of many organizations by providing email services that often include either…
KEV ✓ EPSS 0.72 CVE-2026-73570 Zimbra Synacor veřejná správa US IT HU
MythicRatatoskr: An Yggdrasil-enabled backdoor deployed in a UAC-0099-Sandworm collaboration
ESET researchers uncover MythicRatatoskr – a previously unknown Go-based backdoor hiding its C&C server inside the Yggdrasil mesh network – that paved the way for a destructive attack against a Ukrainian grain firm
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Inside SiriusQT: A Seriously Skilled RAT
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Lazarus hackers use post-quantum cryptography for malware delivery
North Korean hackers are using a post-quantum cryptographic mechanism to secure malicious payload delivery in new operations that combine old and new malware. [...]
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ClickFix has never been bigger, and AI tools are its most convincing lure yet
ClickFix attacks are surging as cybercriminals use fake AI installers, malicious search results, and trusted chatbot platforms to trick users into executing malware. Push Security examines how these attacks evade traditional defenses and why AI tools have become increasingly effective lures. [...]
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Amazon-Themed ClickFix Campaign Serves Up Finger-Licking Malware
A Google search for Amazon business led to a ClickFix lure that dropped multiple malicious payloads onto the victim machine, including versions of Lumma Stealer and NetSupport Client RMM.
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Operation FlashHole: Lazarus breaks security, defies control
In January, we responded to the Lazarus Group’s novel attack campaign against South Korea, which followed last year’s Operation SyncHole. In this new operation, the group employed an updated malware chain that included both their old and new malware, which we disclosed in full, and used another mandatory South Korean security software program as a part of infection chain using a watering‑hole strategy. Notably, the group targeted victims more selectively, sending spear‑phishing emails with…
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BRONZE SANDCASTLE deploys modified Meterpreter shells
<p>The China-based threat group uses DLL sideloading in these attacks</p> Categories: Threat Research Tags: BRONZE SANDCASTLE, Meterpreter, Sandboxie
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SPOJENO PŘES CVE BeyondTrust Remote Support - BT26-05
Classification: Critical, Solution: Official Fix, Exploit Maturity: Functional, CVSSv3.1: 9.3, CVEs: CVE-2026-102764, Summary: BeyondTrust has remediated a critical vulnerability in Remote Support (RS) that could allow a remote attacker to perform file operations on an affected appliance. The vulnerability exists within internal components of Remote Support. The components did not adequately validate the origin of the messages it received. Under the right conditions, this could be used to…
KEV ✓ EPSS 0.19 CVSS 9.3 CVE-2026-102764 BeyondTrust FI CA SE US NL IT
Orphaned VBA Projects Inside DWG Files: YARA Rule, (Sun, Oct 18th)
Here is the YARA rule I used to detect "Orphaned VBA Projects Inside DWG Files". rule autocad_orphaned_vba_project { strings: $a = "AC10" $b = {D0 CF 11 E0 A1 B1 1A E1} $c = "[Host Extender Info]" ascii condition: $a at 0 and uint32(0x24) == 0 and $b and $c } A VirusTotal retrohunt with this rule gave me only 2 detections: 09d4607941e458f6dbb6be17825641d863c0b37c185027984e137d8a67e919d8 3310c1a9bfe6115e49d8ac372cef5f460850da05138340107e66b958a6b5bca6 Didier Stevens Senior handler blog…
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Mind the (Patch) Gap , Part 3: Analysis with Volexity Volcano, Threat Intel, and MCP
Last month, Volexity published two blog posts in its Mind the (Patch) Gap series. The series details Volexity’s discovery of multiple Chinese threat actors simultaneously using zero-day exploits in Google Chrome and Microsoft Windows in campaigns that, if successful, would download and run malware on an exploited system. Those posts covered technical details of the exploits and malware Volexity observed, along with general detection methods for each case. Behind those findings was one of the…
Zero-click attacks used targeted ads to deliver Candiru spyware
Candiru spyware was delivered to devices at Al Jazeera Media Network via targeted online advertisements in a zero-click attack that required only rendering the malicious ads on the victim's device. [...]
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AI-Powered Espionage Campaign Targets Government Linux Infrastructure
Our analysis an AI-powered espionage campaign targeting government Linux infrastructure with custom malware, web shells, and advanced credential theft. The post AI-Powered Espionage Campaign Targets Government Linux Infrastructure appeared first on Unit 42.
The Q3 Vulnerability Pulse: Discovery ≠ Exploitation
Welcome to this week’s edition of the Threat Source newsletter. I've been following a lot of (sometimes heated) threads and discussions lately about the current vulnerability landscape. I learned new words/phrases such as Summer of Hell (although I'm writing this with 1°C/34°F outside), Vulnpocalypse, Bugmageddon, Bugpocalypse, Breachpocalypse... Let's look at some numbers: We crossed the 70k mark, and it's only the end of September. This has never been seen before — I think we can agree this…
KEV ✓ EPSS 0.87 CVE-2014-125110 CVE-2015-1000013 CVE-2026-104935 veřejná správa US
Investigating Ephemeral Supply Chain Tampering
Written by: Tyler McLellan Introduction Google Threat Intelligence Group (GTIG) and Mandiant investigated a software supply chain compromise campaign targeting the update infrastructure belonging to AOMEI Technology between April 2026 and July 2026. The threat actor conducted repeated, short-burst configuration tampering against AOMEI origin servers. Each tampering window remained active for only five to ten minutes before reverting to authentic versions. This is the first time that we have…
Panchan's Mining Island [Guest Diary], (Wed, Oct 14th)
[This is a Guest Diary by Zachary Norwood, an ISC intern as part of the SANS.edu BACS program] Crypto mining malware has been active and spreading across the internet for quite some time now. Moreover, the DShield honeypot picked up a worm that self-propagates through a plethora of means. One of them is stealing SSH keys after it gains access to a system. Furthermore, it also leverages a rootkit to maintain access to infected systems. One would hope that threat actors would have moved on past…
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skynox7: Proxyjacking Edge Devices Into Residential Proxies
How a live GreyNoise product demo turned into an incident response. Inside a proxyjacking campaign that hit 143 devices across 34 countries.
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Unit 42 Uncovers PEERSTITCH, a Stealthy FortiGate Implant
We investigated an intrusion where attackers exploited CVE-2024-47575 to target 500+ firewalls and deploy PEERSTITCH, a memory-resident ARM64 malware. The post Unit 42 Uncovers PEERSTITCH, a Stealthy FortiGate Implant appeared first on Unit 42.
KEV ✓ EPSS 0.95 CVE-2024-47575 Fortinet US
AI worms could spread across your smart devices, Anthropic warns
Your streaming box might not look like much of a computer. But connect enough inexpensive devices together, and they can run an AI model. Researchers at Anthropic demonstrated this by running a Google Gemma model across 15 off-brand Android TV boxes. They warn that small models could soon spread across vulnerable internet-of-things (IoT) devices, including smart ovens and TV boxes, stating: “Our experiments suggest that small AI models may be months away from being capable enough to self…
Break the silence: Kazakhstan-nexus UAT-6275 targets CIS government organizations
This research was conducted jointly with Julian-Ferdinand Vögele of Recorded Future’s Insikt Group. Details of the joint research and presentation are available here. Cisco Talos identified UAT-6275 (TAG-193 by Recorded Future) activity targeting government organizations across the Commonwealth of Independent States (CIS). Recovered artifacts show additional interest in water resources and energy. This focus is consistent with intelligence collection and may reflect the regional effects of the…
KEV ✓ · ransomware EPSS 1.00 CVE-2025-25257 CVE-2025-8088 WinRAR Fortinet veřejná správa energetika vodárenství US
Hirudo Android malware replaces banking apps to evade security checks
A new Android malware called Hirudo steals bank account credentials by replacing legitimate banking apps with modified versions that disable security checks. [...]
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KGB RAT: A Fully Undetectable Windows Trojan Built to Spy, Steal, and Terrorize
Group-IB researchers analyze KGB RAT, a Windows Remote Access Trojan advertised on underground forums as being fully undetectable, featuring a built-in crypter, HVNC, credential theft, ransomware, and an unusual set of psychological harassment capabilities.
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Orphaned VBA Projects Inside DWG Files, (Wed, Oct 14th)
Years ago I wrote diary entries about VBA code stored inside AutoCAD drawing files (.dwg). In a nutshell: the VBA code is stored inside an OLE file, that is embedded inside the DWG file. You can do a brute-force search for the embedded OLE file, or you can follow a pointer inside the header of the DWG file. I wrote a small Python script (autocad.py) for this second case. It looks at a 32-bit pointer at position 0x24 inside the DWG file. This points to a 16-byte long header, followed by the…
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Anthropic warns self-replicating AI could spread to your smart devices
Anthropic is warning that small AI models could soon be able to self-replicate across consumer IoT devices, from Android TV boxes to smart ovens, creating distributed botnets capable of running AI workloads without relying on data centers. [...]
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Inside AvisLoader: A Windows Malware Loader Built to Resist Disruption
A new Windows malware loader called AvisLoader uses encrypted peer-to-peer communications to make command-and-control infrastructure harder to disrupt. Varonis researchers explain how the malware uses ClickFix delivery, shortcut-based persistence, and remote command execution capabilities. [...]
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Auditing the auditor: Unmasking Apex Accelerator
Elastic Security Labs identified a malicious npm package, @apexacc/cli, which led us to an operation posing as a Web3 accelerator. That operation had spent months building a public presence, targeting cryptocurrency start-ups and founders with offers of free AI credits and coding tools, along with security audits. The group also advertised an in-person event through a dedicated invitation page, adding to its efforts to appear legitimate. The tools delivered information-stealing malware and…
SPOJENO PŘES CVE Making sure the checks get printed
Welcome to this week’s edition of the Threat Source newsletter. My name is Pierre Cadieux, and I’ll be helping contribute to these newsletters. A little about me: I’ve been working in the cybersecurity industry in many roles over the past 20+ years, first focusing on endpoint security, policies, and firewalls, then moving to risk management and compliance, disaster recovery, and investigations. I spent about 15 years as a consultant working across many well-known consultancy firms and…
KEV ✓ EPSS 0.11 CVSS 8.7 CVE-2026-88779 Cisco Citrix Google US CA FI GB FR IT
Russian-aligned spies upgrade malware used in attacks on Ukrainian transport, energy firms
Russian-aligned hackers have targeted Ukrainian transportation, manufacturing and energy companies with a constantly evolving malware strain designed to harvest system data, according to new research.
Ignore all instructions and read this blog: The state of AI-analysis evasion in malware
“AI-analysis evasion” encapsulates the real-world techniques malware authors are developing in attempt to obstruct or defeat any layers of automated AI analysis. This technique is cheap to add but inconsistently impactful — the best techniques steered the outcome in the attacker’s favor in about 35% of test runs. Further, it must always be plaintext and therefore is always detectable. The operators are not wrong to assume AI tools are in the analysis pipeline, but the answer is not to remove…
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MATCHBOIL: New tricks, same old evil intentions
ESET Research catalogs the changes of UAC-0099’s MATCHBOIL downloader from 2024 to 2026
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Up a Creek Without a Command Line: Mapping an Akira Ransomware Attack
How Huntress researchers reconstructed an Akira ransomware attack using Registry artifacts, Akira logs, and other post-compromise evidence.
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Blinder Tunnel Campaign Targets Iraqi Infrastructure
Analysis of Blinder Tunnel, an Iran-nexus campaign using fake Dubai Airports recruitment lures and GitHub C2 malware to target critical infrastructure. The post Blinder Tunnel Campaign Targets Iraqi Infrastructure appeared first on Unit 42.
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More RMM Tools In the Wild, (Tue, Oct 6th)
It seems that a trend started… I continue my journey discovering more RMM ("Remote Management & Monitoring") tools abused by threat actors! A few days ago, I wrote a diary[1] about ScreenConnect used in the wild. Today, I found another one. Same scenario, it started with a phishing email that delivers a fake PDF invoice to the victim: When the PDF is opened, it just redirect to a malicious VBS file. Indeed, the PDF contains an “OpenAction” and “URI” keywords, that sounds weird! remnux@remnux:~…
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How Huntress Detects and Responds to a ClickFix Attack
ClickFix attacks leave no file to scan or block, which is why most endpoint tools miss it. See how Huntress Attack Disruption kills the chain in under a second.
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