All news with #data exfiltration tag

🔒 Google researchers report suspected China-linked operators used a Go-based backdoor named Brickstorm to persistently exfiltrate data from U.S. technology, legal, SaaS and BPO organizations, with an average dwell time of 393 days. Brickstorm operated as a web server, file dropper, SOCKS relay and remote command executor while masquerading traffic as legitimate cloud services and targeting edge appliances that often lack EDR. GTIG attributes the activity to UNC5221, a cluster linked to Ivanti zero-day exploitation and custom tools like Spawnant and Zipline. Mandiant published a scanner with YARA rules but cautioned it may not detect all variants or persistence mechanisms.

🛡️ CISA released an alert about a widespread software supply chain compromise affecting the npm registry: a self-replicating worm called 'Shai-Hulud' has compromised over 500 packages. The actor harvested GitHub Personal Access Tokens and cloud API keys for AWS, Google Cloud, and Azure, exfiltrating them to a public repository and using them to publish malicious package updates. CISA recommends immediate dependency reviews, credential rotation, enforcing phishing-resistant MFA, pinning package versions to releases before Sept. 16, 2025, hardening GitHub settings, and monitoring for anomalous outbound connections.

🔓 Radware disclosed ShadowLeak, a zero-click vulnerability in OpenAI's ChatGPT Deep Research agent that can exfiltrate sensitive Gmail inbox data when a single crafted email is present. The technique hides indirect prompt injections in email HTML using tiny fonts, white-on-white text and CSS/layout tricks so a human user is unlikely to notice the commands while the agent reads and follows them. In Radware's proof-of-concept the agent, once granted Gmail integration, parses the hidden instructions and uses browser tools to send extracted data to an external server. OpenAI addressed the issue in early August after a responsible disclosure on June 18, and Radware warned the approach could extend to many other connectors, expanding the attack surface.

🪱 Researchers have identified a self-propagating npm worm dubbed Shai-Hulud that injects a 3MB+ JavaScript bundle into packages published from compromised developer accounts. A postinstall action executes the bundle to harvest npm, GitHub, AWS and GCP tokens and to run TruffleHog for broader secret discovery. The worm creates public GitHub repositories to dump secrets, pushes malicious Actions to exfiltrate tokens, and has exposed at least 700 repositories; vendors urge rotation of affected tokens.

🛡️ This report analyzes the Sept 14–16 campaign that compromised over 180 NPM packages and propagated the self‑replicating Shai‑Hulud worm, which pushed malicious changes and exfiltrated secrets by publishing data.json files to public GitHub repositories. By parsing the GitHub events archive, researchers identified 207 affected repositories tied to 37 users and attributed those users to 17 employers. Several infected users were NPM maintainers who acted as “super spreaders.” Although exposed files were removed, archived events enable retrospective reconstruction and demand urgent auditing and remediation.

🔓 Security firm Aikido uncovered a coordinated supply chain attack that injected obfuscated, browser-based malware into 18 popular npm packages — including chalk, debug, and ansi-styles — collectively receiving two billion weekly downloads. The malicious updates, pushed beginning September 8, intercept and manipulate web3 and crypto interactions in the browser to silently rewrite payment destinations and approvals. The campaign originated from a phishing operation that abused a typosquatted domain (npmjs.help) to compromise maintainer accounts, and although the attacker demonstrated web3 knowledge, tracked losses were modest (~$970). Researchers warn enterprise defenses are largely blind to this API-level interceptor and call for stronger attestation and signed publication workflows.

⚠️ Unit 42 observed a campaign that abused the Salesloft Drift integration using compromised OAuth credentials to access and exfiltrate data from customer Salesforce instances. The actor performed large-scale extraction of objects including Account, Contact, Case and Opportunity records and scanned harvested data for credentials. Salesloft revoked tokens and notified affected customers; organizations should immediately review logs, rotate exposed credentials and hunt for the provided IoCs.

🛡️ Malicious updates to the Nx npm package were published on 26 August, briefly delivering AI-assisted data‑stealing malware to developer systems. The infected releases injected crafted prompts into local AI CLIs (Anthropic’s Claude, Google Gemini, Amazon Q) to locate GitHub/npm tokens, SSH keys, .env secrets and cryptocurrency wallets, then encoded and uploaded the harvest by creating public repositories under victims' accounts. StepSecurity says eight compromised versions were live for five hours and 20 minutes and that attackers subsequently weaponized stolen GitHub CLI OAuth tokens to expose and fork private organization repositories. Recommended mitigation includes revoking tokens and SSH/GPG keys, making exposed repos private, disconnecting affected users and following a full remediation plan.

🔐 TransUnion has disclosed unauthorized access to a third-party application serving its US consumer support operations, affecting nearly 4.5 million Americans. The company says the incident exposed specific personal data elements but did not include credit reports or core credit information. Detected July 30 after an intrusion on July 28, TransUnion is offering free credit monitoring and proactive fraud assistance while it enhances security controls.

🔐 The Nx package ecosystem was trojanized via a malicious post-install script, telemetry.js, which exfiltrated developer secrets from macOS and *nix environments. Stolen items included npm and GitHub tokens, SSH keys, crypto wallets, API keys and .env contents, uploaded to public GitHub repositories. Immediate actions include auditing Nx package versions, removing affected node_modules, rotating all potentially exposed secrets and monitoring repositories and Actions for misuse.

🔒 The maintainers of nx warned of a supply-chain compromise that allowed attackers to publish malicious versions of the npm package and several supporting plugins that gathered credentials. Rogue postinstall scripts scanned file systems, harvested GitHub, cloud and AI credentials, and exfiltrated them as Base64 to public GitHub repositories named 's1ngularity-repository' under victim accounts. Security firms reported 2,349 distinct secrets leaked; maintainers rotated tokens, removed the malicious versions, and urged immediate credential rotation and system cleanup.

🔐 Microsoft Threat Intelligence reports that the financially motivated actor Storm-0501 has refined cloud-native techniques to rapidly exfiltrate and delete data in hybrid Azure environments. The group leveraged on-premises footholds—using tools such as Evil-WinRM and a DCSync attack—to compromise an Entra Connect server and identify a non-human synced Global Admin account without MFA. With that account the attackers registered a threat actor-owned federated tenant as a backdoor, escalated Azure privileges, and proceeded to mass-extract data and remove resources and backups before extorting victims through compromised Microsoft Teams accounts. Microsoft has updated Entra ID behavior, released Entra Connect 2.5.3.0 to support Modern Authentication, and recommended enabling TPM, enforcing MFA, and other hardening controls.

🔍 Group-IB links a broad cyber-espionage campaign, active since 2023 and ongoing into mid‑2025, to the ShadowSilk cluster targeting Central Asian and Asia‑Pacific government organizations. The operation, which has compromised at least 35 government victims, primarily seeks data theft and distributes stolen material on dark web forums. ShadowSilk uses phishing with password‑protected archives, commodity web panels such as JRAT and Morf Project, and post‑compromise tools like Cobalt Strike and Metasploit. Researchers found indicators of both Russian‑ and Chinese‑language operators and advise stronger email defenses, strict application control, regular patching and proactive threat hunting.

🔎 Group-IB attributes a new cluster dubbed ShadowSilk to recent intrusions against 35 government and related organizations across Central Asia and APAC. The operators employ spear-phishing with password-protected archives to deploy a custom loader that conceals command-and-control traffic using Telegram bots and achieves persistence via Windows Registry modifications. Observed tooling includes web shells (ANTSWORD, Behinder, Godzilla, FinalShell), tunneling utilities, Cobalt Strike, and bespoke credential-stealing components used to exfiltrate data.

🔒Unit 42 describes how financially motivated actors blend reconnaissance and social engineering to target high-end retailers and other sectors, stealing customer data for extortion. Attackers commonly use voice-based phishing and impersonation to harvest credentials or trick users into running a modified Data Loader for Salesforce, then search SharePoint, Microsoft 365 and Salesforce for PII. Because intrusions often avoid malware, forensic artifacts are minimal, complicating detection and response.

⚠️ EchoLink is a newly identified zero-click vulnerability in Microsoft 365 Copilot that enables silent exfiltration of enterprise data without any user interaction. This class of attack bypasses traditional click- or download-based defenses and moves laterally at machine speed, making detection and containment difficult. Organizations relying solely on native tools or fragmented point solutions should urgently reassess their exposure and incident response readiness.

🧩 Muddled Libra is not a single organized group but a fluid collaboration of personas that form distinct strike teams with varying objectives and tradecraft. Unit 42 has identified patterns across at least seven teams, from crypto theft and extortion to IP theft and mass data harvesting. Defenders should prioritize protecting high-value data, tighten access controls, and assume evolving tactics rather than a fixed adversary profile.