All news with #remote access trojan tag

🛡️ A one-day spearphishing campaign named PhantomCaptcha targeted Ukrainian regional government officials and multiple war-relief organizations on October 8, using malicious PDFs that linked to a fake Zoom domain and impersonated the President’s Office. According to SentinelLABS, the operation used a fake Cloudflare CAPTCHA to trick victims into copying and pasting a token into the Windows Command Prompt, which executed a PowerShell downloader and deployed a WebSocket RAT. The lightweight RAT provided remote command execution and data exfiltration capabilities, and researchers found follow-on activity delivering spyware-laced Android APKs to users in Lviv.

🔒 A European telecommunications organization was targeted in the first week of July 2025, according to Darktrace, with a threat actor linked to the China-associated group Salt Typhoon gaining initial access via a vulnerable Citrix NetScaler Gateway. The intruders pivoted to Citrix VDA hosts in an MCS subnet and used SoftEther VPN to mask their origin. They deployed Snappybee (aka Deed RAT) via DLL side-loading alongside legitimate antivirus executables; the backdoor called home to aar.gandhibludtric[.]com. Darktrace says the activity was detected and remediated before significant escalation.

🔒 Seqrite Labs uncovered a new .NET implant named CAPI Backdoor linked to a phishing campaign targeting Russian automobile and e-commerce organizations. The attack leverages a ZIP archive containing a decoy Russian tax notice and a Windows LNK that loads a malicious adobe.dll via the legitimate rundll32.exe. The backdoor gathers system and browser data, takes screenshots, and communicates with a remote C2 for commands and exfiltration. Persistence is achieved through scheduled tasks and a Startup LNK.

🔎 Silver Fox operators have expanded the Winos 4.0 (ValleyRAT) campaign from China and Taiwan to target Japan and Malaysia, and are also deploying a secondary RAT tracked as HoldingHands. The actors use phishing emails with booby‑trapped PDFs, SEO‑poisoned pages and targeted .LNK résumé lures to deliver multiple payloads, including Winos modules and HoldingHands. Observed techniques include DLL sideloading, Task Scheduler recovery abuse, anti‑VM checks and AV termination to maintain persistence and evade detection.

🔒 An AWS-hosted compromise revealed a new GNU/Linux rootkit dubbed LinkPro, discovered by Synacktiv. Attackers leveraged an exposed Jenkins server vulnerable to CVE-2024-23897 and deployed a malicious Docker image (kvlnt/vv) to Kubernetes clusters, delivering a VPN/proxy (vnt), a Rust downloader (vGet) and vShell backdoors. LinkPro relies on two eBPF modules—Hide and Knock—to conceal processes and activate via a magic TCP packet, with a user-space fallback via /etc/ld.so.preload when kernel support is missing.

⚠ The phishing campaign impersonates LastPass and Bitwarden, sending convincing emails claiming breaches and urging users to install a 'more secure' desktop app. The distributed binary installs the legitimate Syncro MSP agent, which then deploys ScreenConnect remote-access software to give attackers persistent control. Cloudflare is blocking the malicious landing pages, and vendors confirm no breaches occurred.

🔍 Proofpoint researchers uncovered TA585, a cybercriminal group that operates its own phishing, delivery and malware infrastructure rather than outsourcing. The actor distributes MonsterV2, a subscription-based RAT/stealer/loader that avoids CIS systems and offers modules like HVNC. Early 2025 campaigns used ClickFix social engineering and compromised sites with fake CAPTCHAs to filter victims and deliver payloads, and organisations should train users to spot ClickFix and restrict PowerShell for non-admins.

🔎 Proofpoint researchers detailed a previously undocumented actor, TA585, observed delivering the off‑the‑shelf malware MonsterV2 through tailored phishing chains. The actor appears to manage its entire operation — infrastructure, delivery, and payload installation — employing web injections, CAPTCHA overlays and ClickFix social engineering to trigger PowerShell or Run commands. MonsterV2 functions as a RAT, stealer and loader with HVNC, keylogging, clipboard clippers and a C++ crypter (SonicCrypt) to evade detection. Proofpoint also links parts of the infrastructure to other stealer campaigns and highlights commercialized pricing and geographic filtering in its monetization.

🔍 Researchers at GreyNoise have identified a large-scale, multi-country botnet that began targeting Remote Desktop Protocol (RDP) services in the United States on October 8. The campaign uses over 100,000 IP addresses and employs two RDP-specific techniques: RD Web Access timing attacks to infer valid usernames and RDP Web Client login enumeration to observe differing server behaviors. Nearly all sources share a common TCP fingerprint, indicating coordinated clusters. Administrators should block attacking IPs, review RDP logs, and avoid exposing remote desktop services to the public internet—use VPNs and enable multi-factor authentication.

🔒 DarkAtlas researchers warn that APT groups are leveraging legitimate RMM platforms to gain initial access, increasingly favoring ScreenConnect as it evades basic detection. Attackers abuse features like unattended access, VPN, REST API and file transfer, deploy in-memory installers that leave little disk artefacts, and register persistent services such as ScreenConnect.WindowsClient.exe. Defenders should monitor invite links, config files, in-memory activity and specific event IDs for effective DFIR.

🛡️ GreyNoise researchers uncovered a massive RDP attack wave using more than 100,000 IP addresses across over 100 countries, which analysts link to a single large botnet targeting U.S. Remote Desktop infrastructure. The attackers used two enumeration techniques — an RD Web Access timing attack to infer valid usernames and an RDP Web Client login enumeration to guess credentials — enabling efficient compromise while reducing obvious alerts. GreyNoise published a dynamic blocklist template, microsoft-rdp-botnet-oct-25, and recommends that organizations review logs for unusual RDP access patterns and automatically block associated IPs at the network edge.

🔒 eSentire disclosed a Rust-based backdoor named ChaosBot that leverages Discord channels for command-and-control, allowing operators to perform reconnaissance and execute arbitrary commands on compromised systems. The intrusion, first observed in late September 2025 at a financial services customer, began after attackers used compromised Cisco VPN credentials and an over-privileged Active Directory service account via WMI. Distribution included phishing LNK files that launch PowerShell and display a decoy PDF, while the payload sideloads a malicious DLL through Microsoft Edge to deploy an FRP reverse proxy. ChaosBot supports commands to run shells, capture screenshots, and transfer files, and newer variants employ ETW patching and VM detection to evade analysis.

⚠️ Fortinet FortiGuard Labs has detailed an active campaign dubbed Stealit that uses Node.js Single Executable Application (SEA) packaging—and in some builds, the Electron framework—to deliver credential-stealing and remote-access payloads. Operators distribute counterfeit game and VPN installers via file-hosting sites and messaging platforms, which drop three primary executables that perform browser and messenger data theft, wallet extraction, and persistence with live screen streaming. Installers run anti-analysis checks, write a Base64 authentication key to %temp%\cache.json for C2 authentication, and configure Microsoft Defender exclusions to conceal downloaded components.

🔎 Volexity attributes a series of tailored spear‑phishing campaigns to a China‑aligned actor tracked as UTA0388, which delivers a Go-based implant named GOVERSHELL. The waves used multilingual, persona-driven lures and legitimate cloud hosting (Netlify, Sync, OneDrive) to stage ZIP/RAR archives that deploy DLL side‑loading and a persistent backdoor. As many as five GOVERSHELL variants emerged between April and September 2025, succeeding an earlier C++ family called HealthKick. Volexity also observed the actor abusing LLMs such as ChatGPT to craft phishing content and automate workflows.

🔍 Huntress Labs analyzed a multi-stage intrusion that began with a phishing ZIP and DLL sideloading and escalated to deployment of the commercial PureRAT backdoor. The operator combined bespoke Python loaders and a Python-based infostealer with compiled .NET loaders, process hollowing, AMSI/ETW tampering, and reflective DLL injection to evade detection. Final-stage configuration revealed a Vietnam-hosted C2 (157.66.26.209) and Telegram infrastructure linked to PXA Stealer, underscoring a shift from custom theft to a professional RAT.

🔒 Huntress reported that threat actors with suspected ties to China abused a vulnerable phpMyAdmin panel in August 2025 to perform log poisoning, recording a PHP web shell into a query log and naming the file with a .php extension. The actors used the web shell (accessed via ANTSWORD) to deploy the open-source Nezha agent and inventory over 100 hosts—primarily in Taiwan, Japan, South Korea and Hong Kong. The Nezha agent facilitated execution of an interactive PowerShell script that created Microsoft Defender exclusions and launched Gh0st RAT via a loader and dropper.

⚠️ Attackers linked to China turned a benign open-source network monitoring agent into a remote access beacon using log poisoning and a tiny web shell. Huntress says they installed the legitimate Nezha RMM via a poisoned phpMyAdmin log and then deployed Ghost RAT for deeper persistence. The intrusion affected more than 100 hosts across Taiwan, Japan, South Korea, and Hong Kong and was contained in August 2025.

🔍 Huntress analysts uncovered a sophisticated campaign beginning in August 2025 that used log poisoning to plant a PHP web shell and then manage compromised servers via AntSword. The operators downloaded a file named 'live.exe' — identified as the open-source Nezha agent — which connected to a command server at c.mid[.]al and enabled remote tasking. Nezha was used to execute PowerShell commands to disable Windows Defender and to deploy 'x.exe', a Ghost RAT variant that persisted as 'SQLlite'. More than 100 systems, primarily in Taiwan, Japan, South Korea and Hong Kong, were observed communicating with the attackers' dashboard.

🛡️ OpenAI said it disrupted three clusters that misused ChatGPT to assist malware development, including Russian-language actors refining a RAT and credential stealer, North Korean operators tied to Xeno RAT campaigns, and Chinese-linked accounts targeting semiconductor firms. The company also blocked accounts used for scams, influence operations, and surveillance assistance and said actors worked around direct refusals by composing building-block code. OpenAI emphasized that models often declined explicit malicious prompts and that many outputs were not inherently harmful on their own.

🔎 A Vietnam-linked group tracked as BatShadow is running a social-engineering campaign that lures job seekers and digital marketing professionals with faux job descriptions to deliver a previously undocumented Go-based malware, Vampire Bot. Attackers distribute ZIP archives containing decoy PDFs alongside malicious LNK or executable files that launch an embedded PowerShell script to fetch lure documents and remote-access tooling such as XtraViewer. The lure coerces victims into opening links in Microsoft Edge, triggering an automatic ZIP download that contains a deceptive executable padded to appear as a PDF; once executed, the Go binary profiles the host, exfiltrates data, captures screenshots, and maintains contact with a command-and-control server.