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opensourcemalware.comwriteup🛡️ Security

Earliest Known PolinRider Malware Found in 2025 npm Packages

OpenSourceMalware traces nine itsa-* npm package versions published on 4 May 2025 from a hijacked maintainer account to the PolinRider campaign, eight months before documented victims. It decodes the EtherHiding chain (BNB Smart Chain and Ethereum calldata, JADESNOW, INVISIBLEFERRET bootstrapper, Socket.IO RAT, Python stealer) and links the 2025 sample to 2026 force-push infections. It lists IOCs, hashes, a timeline and hunting guidance.

npmNode.jsPython+3

PolinRiderEtherHidingJADESNOW+9

Supply Chain, Malware & RE, Threat Intel· Published and added 30 Oct 2026

rekt.newswriteup🛡️ Security

Rekt - SingularityNET - Rekt

SingularityNET exploit (19 September 2026): attackers with signing authority exposed through a cloud infrastructure breach drained 8.72M FET from the Ethereum bridge converter, then minted about 2.3 billion AGIX, NTX, WMTX and CGV. Rekt's transaction-level reconstruction puts gross liquid proceeds near $2.29M, not the $16.77M headline, and traces laundering via Chainflip, Baltex and THORChain. It notes conversionIn() skipped checkLimits() and trusted a single EOA signature.

EthereumCardanoUniswap+2

SingularityNETASI AllianceFetch.ai+19

Blockchain, Cloud & Infra· Added 29 Oct 2026

rekt.newswriteup🛡️ Security

Rekt - Duelbits - Rekt

Duelbits is a crypto casino that lost an estimated $6.07 million traced across Ethereum, BNB Chain, Tron, Solana and Bitcoin on 24 September 2026, which co-founder Joe put at about $7 million. The Ethereum hot wallet drained was the replacement named after a roughly $4.6 million theft in February 2024. Rekt lists addresses and transactions, deBridge and SunSwap conversions, and Tornado Cash deposits. Duelbits has not published a root cause.

EthereumBitcoinSolana+3

Duelbitsprivate key compromiseScam Sniffer+8

Blockchain, Threat Intel· Added 29 Oct 2026

huggingface.cowriteup🧠 AI

Profiling TorchNeuron (Part 1): System-level profiling on AWS Trainium.

Part 1 of a series on profiling TorchNeuron, the open source PyTorch backend for AWS Trainium. It shows how to configure torch.profiler with NeuronConfig, read the key_averages() table, and trace one op through Neuron Explorer. Three RMSNorm variants are compared: naive eager (2.355 ms device time), torch.rms_norm (403 μs) and torch.compile (375 μs).

PyTorchTorchNeuronAWS Trainium+8

AmazonHugging Face

inference, ai-infra· Published and added 21 Oct 2026

wiz.iowriteup🛡️ Security

PHP2Shell: AI uncovers critical RCE vulnerabilities affecting 70% of the Internet

PHP2Shell is Wiz Research's disclosure of memory-safety bugs in core PHP, grouped under two CVEs (up to CVSS 9.2) and fixed in patched releases on 21 October 2026. The post details four bugs, all triggered by out-of-memory fatal errors that leave stale state: an upload-progress unserializer use-after-free, a session-ID memory disclosure, a fatal-error backtrace use-after-free and an OPcache type confusion. It describes unauthenticated RCE on WordPress, Drupal and Joomla, plus detection signals and a disclosure timeline.

PHPWordPressDrupal+3

PHP2ShellWiz ResearchCalif+6

AppSec, Offensive Security, AI Security· Published and added 21 Oct 2026

anthropic.comwriteup🛡️ Security

Claude reveals ECDSA curve origins

Anthropic's Frontier Red Team reports that Claude recovered how the NIST P-192/224/256/384/521 and ANSI X9.62 curve seeds were generated. They are outputs of the C library's lrand48 LCG seeded with 1997–98 Unix timestamps, not hashes of a passphrase. The method scanned for weak-PRNG signatures, then used LLL lattice reduction to recover the truncated LCG state and stepped it back to srand48 initialization. Claude also traced some base points to the FreeLIP/NTL random generator. Reproducible Python is included. The authors say this is not an attack and makes deliberate backdoors less plausible. The B-163 seed and the base points of P-224/256/384/521 and the binary curves remain unexplained.

ClaudeNTLFreeLIP+1

NISTECDSANIST P-256+16

other· Added 17 Oct 2026, published 16 Oct 2026

anthropic.comwriteup🧠 AI

Claude reveals ECDSA curve origins

Anthropic's Frontier Red Team reports that Claude, given no hint, worked out how the NIST P-192/224/256/384/521 and ANSI X9.62 curve seeds were generated. They came from the C library's lrand48 LCG seeded with Unix timestamps from 1997–98, not from a hash of a phrase. Claude found this by scanning for weak-PRNG signatures and recovering the PRNG state with LLL lattice reduction. It also traced several prime-curve base points to the FreeLIP random generator. The post includes Python code that reproduces the seeds and base points. It says this is not an attack and makes backdoor claims less plausible. B-163 and the other base points remain unexplained.

ECDSAlrand48LLL+4

AnthropicClaudeNIST+10

research· Added 17 Oct 2026, published 16 Oct 2026

unit42.paloaltonetworks.comwriteup🛡️ Security

Unit 42 Uncovers PEERSTITCH, a Stealthy FortiGate Implant

PEERSTITCH is a memory-resident ARM64 implant that Unit 42 found in a September 2024 telecom intrusion (cluster CL-STA-0954, aka UNC5820). Attackers used CVE-2024-47575 on FortiManager to steal configs for more than 500 FortiGates, then CVE-2025-61624 auto-script path traversal to reach root. The report covers ptrace injection into miglogd and iked, an Apache mod_md ACME reverse shell, FGFM impersonation, anti-forensics, hunting guidance, IOCs and YARA.

FortiManagerFortiGateFortiOS+3

CVE-2024-47575CVE-2025-61624CVE-2024-26009+10

Threat Intel, Malware & RE, Blue Team & Detection· Added 30 Oct 2026, published 14 Oct 2026

dfir.chwriteup🛡️ Security

Field Notes: EtherRAT Distributed Through a Legitimate Intune Workflow

DFIR case where a malicious MSI impersonating Advanced IP Scanner, sourced from a fake GitHub repo found via Bing, was imported by a customer into Microsoft Intune and deployed to four endpoints, running a Node.js-based EtherRAT chain. It traces the infections by correlating the MSI ProductCode, MDMAppInstaller/omadmclient process ancestry and Intune app inventory (Graph PowerShell query). It also covers renamed node.exe hash-hunting pitfalls, Ethereum RPC dead-drop C2 traffic, a screen-capture script and a second impersonating repo.

Microsoft IntuneNode.jsEthereum+3

EtherRATEtherHidingAtos Threat Research Center+4

Blue Team & Detection, Threat Intel, Malware & RE· Added 14 Oct 2026, published 13 Oct 2026

simonwillison.netwriteup🧠 AI

Qwen3.8 27B addition in words

Simon Willison reproduces an experiment originally run by Colin Frasier on GPT-4o — asking a model to add two large numbers and return the result spelled out in words — this time against a locally quantised Qwen3.8-27B-Q4_K_M.gguf model on an NVIDIA DGX Spark. He compares heatmaps of accuracy across number-size combinations with reasoning disabled (30 samples per pair) versus reasoning enabled (one-shot, 167/169 correct), and shares chain-of-thought traces showing the model doing manual digit-by-digit column addition. It's a small but concrete illustration of how enabling reasoning changes arithmetic reliability in a quantised local LLM.

GGUFQwen3.8-27BCodex

Simon WillisonColin FrasierGPT-4o+2

evals, inference· Added 5 Oct 2026, published 4 Oct 2026

alignmentforum.orgwriteup🧠 AI

Latent reasoning architectures would likely undermine CoT, our strongest oversight tool

An AI Alignment Forum essay arguing that chain-of-thought (CoT) monitoring — reading a model's natural-language reasoning trace to catch misaligned behavior before it is acted on — is currently one of the strongest practical oversight tools for frontier AI, and that a shift toward latent reasoning architectures (models that reason in continuous/hidden vector space rather than discrete, human-readable tokens) would largely destroy this transparency. The authors, including Ryan Greenblatt and collaborators, lay out why such architectures are plausible as a capability/efficiency direction and what the loss of CoT legibility would mean for safety oversight of advanced models.

Chain-of-Thought

Lukas FinnvedenAlexa PanAlek Westover+4

ai-safety· Added 3 Oct 2026

rekt.newswriteup🛡️ Security

Liquid Network — $320M L-BTC Mint via Range-Proof Cache-Key Collision

On September 6, 2026, an ambiguous four-part cache-key construction in Elements' CachingRangeProofChecker::VerifyRangeProof (introduced by commit c26d719) let two distinct confidential-transaction verification inputs collide into the same 4,301-byte cached entry, causing nodes to treat an unbacked output as a validated range proof. The attacker used this to mint roughly 4,000 unbacked L-BTC on the Liquid Network and cashed it out through SideSwap's PAK peg-out route for ~$320M in BTC, draining the federation reserve from 4,205 BTC to 197 BTC before ~3,400 BTC was voluntarily returned with an on-chain "whitehat" message. CertiK's forensic trace ties the exploit to a specific setup transaction, a still-unidentified cache-priming transaction, and the inflation transaction, while Blockstream shipped emergency patch Elements v23.3.4 and disputes remain over whether the fix fully closes the ambiguity and whether the actors are genuine whitehats.

BitcoinElementsLiquid Network+1

SideSwapCertiKBlockstream+12

Blockchain· Added 2 Oct 2026

chainalysis.comwriteup🛡️ Security

How AI Helped Chainalysis Investigators Trace the $387 Million North Korea Stole from Bitget

Chainalysis describes its investigation into the September 24, 2026 DPRK-attributed theft of $387 million from exchange Bitget, which within three hours moved across Ethereum (49.7%), XRP (40.8%), Zcash (7.6%), and Tron (1.8%). The team built custom in-house AI automation to reconcile cross-chain bridge activity (compressing 20+ hours of manual work to under 10 minutes) and traced stolen XRP through a cross-chain liquidity protocol into Bitcoin, pushing 2026 North Korea-attributed crypto theft past $1 billion.

EthereumBitcoinTron+2

BitgetDPRK

Blockchain, Threat Intel, AI Security· Added 7 Oct 2026, published 1 Oct 2026

ethresear.chwriteup🛡️ Security

Trust minimized transaction simulation using state proofs

An ethresear.ch post proposing "verified prestate simulation": wallets fetch the prestate a transaction will touch via debug_traceCall's prestateTracer, confirm unanimous state-root agreement across multiple independent RPC nodes, verify each account/storage value with eth_getProof Merkle Patricia Trie proofs, and only then execute the transaction locally with revm to produce trustworthy simulation results. It targets a concrete wallet attack where a compromised simulation API/RPC provider shows a benign fake trace (e.g. "donate to charity") while the real calldata drains a user's funds, and discusses its limitations (prestate-completeness not yet verified, conditional-logic and MEV evasion still possible) as a pragmatic alternative to full light clients.

EthereumrevmRust

Blockchain· Published and added 1 Oct 2026

huggingface.cowriteup🧠 AI

Getting the Source Right, Not Just the Fact: Source-Aware Verification for MCP Agents

A research writeup from Multiverse Computing introducing ProvenanceGuard, a post-generation verification layer for MCP-based LLM agents that checks not just whether a claim is factually supported somewhere in retrieved evidence, but whether it is attributed to the correct source tool or document, a failure mode they call cross-source conflation. Using local models (MiniLM for source routing, a DeBERTa NLI verifier, and a local LLM for claim decomposition) plus a RARR-style repair loop, it was evaluated on 281 real MCP traces from a medical agent, catching 138 of 139 unsupported claims flagged by human experts and correctly identifying the exact source about 86% of the time on held-out data, outperforming four source-blind baseline checkers. The method has already been adopted in NVIDIA's NVFlow finance-agent grounding stage.

Model Context ProtocolHugging Face

ProvenanceGuardMultiverse ComputingNVIDIA NVFlow+5

evals, research, mcp· Published and added 29 Sep 2026

pgj11.comwriteup🛡️ Security

Microsoft Windows NCSI Cross-Context Proxy Authentication Coercion - ZDI-26-708 - Part 1

A researcher reverse-engineers Windows NCSI (ncsi.dll, running under the Network List Service/netprofm as NETWORK SERVICE) to explain how a manual proxy or WPAD/PAC URL set by an unprivileged user gets applied to NCSI's active-probe HTTP request, causing the service account to NTLM-authenticate to an attacker-controlled proxy. On domain-joined hosts this cross-context proxy authentication can be captured/relayed (e.g. via ntlmrelayx) toward ADCS, Shadow Credentials, or RBCD; the finding was submitted to ZDI as ZDI-26-708 and Microsoft declined to assign a CVE, classifying it Moderate-Spoofing. Part 1 covers reproduction and the active-probe path through NcsiHttpGet/WinHTTP; Part 2 (linked) traces the root cause back to WinINet's Event ID 5600.

WindowsActive DirectoryImpacket+1

ZDI-26-708NCSInetprofm+12

Offensive Security· Published and added 28 Sep 2026

opensourcemalware.comwriteup🛡️ Security

PolinRider is A/B Testing its Way Past Your Detections

Opensourcemalware.com traces PolinRider, a DPRK-linked supply-chain malware delivered via a poisoned .vscode/tasks.json that autoruns an obfuscated payload disguised as a Font Awesome .woff2 file, through an 8-month infection of three real GitHub repos (Binary-Mindz org). Using GitHub's server-side activity log they reconstruct 853 force-pushes showing the operators A/B-testing multiple concurrent payload variants (400/500/900), rewriting commits to impersonate legitimate cleanup commits, hiding payloads inside eslint.config.mjs and prisma.config.ts, and using an Ethereum-wallet-based C2 dead-drop (NullReceiver). The post lists why common detection heuristics (filename search, whitespace padding, marker strings) fail against the new variants and gives working detections (file-type checks, folderOpen task grepping, activity-log force-push monitoring) plus full IOCs.

VS CodeGitHubNode.js+2

PolinRiderDPRKContagious Interview+2

Threat Intel, Supply Chain, Blue Team & Detection, Malware & RE· Published and added 26 Sep 2026

microsoft.comwriteup🛡️ Security

Storm-3168: Agentic-driven cloud attacks using compromised service principals

Microsoft Security Research documents an Azure-focused campaign by Storm-3168 (aka JADEPUFFER, discovered by Sysdig as the first documented agentic ransomware operation), using two compromised service principals to enumerate an Azure tenant and then execute a seven-minute destructive sequence deleting 100+ Storage Accounts, a Key Vault, a Function App, and attempting (unsuccessfully, due to API version mismatch) to delete Azure SQL databases. Initial access traces to a client ID/secret/tenant ID leaked in a GitHub issue's public edit history even after the secret was redacted; the attacker also harvested storage account keys and targeted Site Recovery/Backup protection locks to impair recovery, consistent with ransomware/extortion tradecraft. The post includes a MITRE ATT&CK mapping (T1190, T1078.004, T1526, T1485, T1490) and mitigation guidance around workload identity hygiene, least privilege, and backup protection.

AzureMicrosoft Defender XDRMicrosoft Defender+3

Storm-3168JADEPUFFERSysdig+7

Threat Intel, Cloud & Infra, AI Security· Added 7 Oct 2026, published 25 Sep 2026

rapid7.comwriteup🛡️ Security

When Business Email Compromise Starts Rewriting Reality

Rapid7 previews collaborative research with Zimbra that uncovered over 50 vulnerabilities in the Zimbra Collaboration Suite, several of which let attackers impersonate senders without credentials, control inbox visibility, and alter shared documents and calendars, turning classic Business Email Compromise into active manufactured-reality attacks rather than passive mailbox monitoring. It traces the pattern through real exploited Zimbra CVEs in CISA's KEV catalog (CVE-2024-45519 postjournal command injection, CVE-2025-27915 stored XSS via calendar invite used against Brazilian military targets, CVE-2026-73570 SNMP command injection) and earlier 2022 to 2023 zero-days (CVE-2022-27925, CVE-2022-37042 path traversal plus auth bypass, CVE-2023-37580) exploited by multiple threat groups per Google's Threat Analysis Group.

Zimbra

CVE-2024-45519CVE-2025-27915CVE-2026-73570+7

AppSec, Threat Intel· Added 7 Oct 2026, published 24 Sep 2026

latent.spacewriteup🧠 AI

Underwriting Superintelligence: Backing Agents you can Sue — Rune Kvist, AIUC

Latent Space interview with Rune Kvist, cofounder of AIUC (AI Underwriting Company), on its $40M Series A and AIUC-1 — a quarterly-updated standard for agent security, safety and reliability that pairs technical controls with third-party testing (jailbreak resistance, hallucination rates, data leakage) and real Lloyd's of London-backed insurance. The piece traces AIUC's origin from Kvist's early Anthropic experience, explains why enterprises like Cursor, Harvey, Lovable and ElevenLabs pursue certification to unlock bank/hospital deployments, and previews AIUC's move toward model-level audits to bridge the trust gap between frontier labs and governments. It covers concrete mechanics of the certification process (control activities, evidence, auditors like KPMG/Schellman, 3–10 week timelines) alongside liability scenarios and the "who watches the watchdogs" problem for AI standards.

Model Context ProtocolOpenClaw

Rune KvistAIUCAIUC-1+23

ai-policy, evals· Added 29 Sep 2026, published 16 Sep 2026

binarly.iowriteup🛡️ Security

Malicious Model Detection with MLTracer Syscalls

Binarly presents MLTracer, a pipeline that loads PyTorch/pickle model files in a Docker sandbox with strace and FakeNet-NG, flags suspicious syscalls, and labels behavior (reverse shell, downloader, exfiltration) with a SetFit classifier. Run over ~2.12M Hugging Face files, it found 218 confirmed malicious models. Hugging Face-hosted scanners (Protect AI, JFrog, ClamAV, VirusTotal) and ModelScan/SaferPickle missed 9–84% of them. The post also tabulates 21 static-scanner evasion techniques, two of them novel (CodeType/FunctionType indirect variant, EXT2 + copyreg.add_extension), and shows detection of a CVE-2025-32434 exploit that the HF scanners missed.

Hugging FacePyTorchPython+3

CVE-2025-32434MLTracerAlternative Execution Primitives+4

AI Security, Supply Chain, Malware & RE· Published and added 1 Sep 2026

socket.devwriteup🛡️ Security

Socket: FUNNULL iOS Spyware Campaign via 13 Malicious Packagist Themes

Socket's Threat Research Team traced 13 malicious Composer/Packagist theme packages (across vsmov, vsphim, haiau009, chilltvcms, ophimcms vendors) used by Vietnamese movie/comic streaming sites, which inject JavaScript running an ad-fraud/gambling redirect on all mobile visitors and, on unpatched iPhones, chain WebKit exploits (CVE-2025-31277, CVE-2025-43529) through a GPU-process pivot into a kernel escape via the AppleM2ScalerCSCDriver IOKit client (related to CVE-2026-43655) to install spyware. The payload exfiltrates keychain data, SMS, photos, contacts, and — after an August 2026 redeployment — directly steals crypto wallet seeds/mnemonics from Bitget, Phantom, Trust Wallet, and others. The report attributes delivery infrastructure to FUNNULL (Triad Nexus, OFAC-sanctioned operator Liu Lizhi), ties the exploit kit to the "DarkSword" iOS exploit family, and provides full IOCs, hashes, and MITRE ATT&CK mapping.

PackagistComposerPHP+4

CVE-2025-31277CVE-2025-43529CVE-2026-43655+8

Supply Chain, Mobile Security, Threat Intel· Published and added 1 Sep 2026

huntress.comwriteup🛡️ Security

Daisy-Chaining Trust: Investigating Faronics Deploy Abuse | Huntress

Huntress details a phishing campaign that tricks victims into installing a legitimately signed Faronics Deploy agent disguised as Adobe/Zoom documents, enrolling endpoints into an attacker-controlled deployment console. The threat actors then abuse Faronics' remote script execution to pull PowerShell payloads (via curl, mshta, msiexec) from GitHub-hosted staging and install ScreenConnect for persistent remote access. The post identifies key forensic artifacts (C:\ProgramData\Faronics\Logs\ScriptRunner.log and the deployment's unique "ck" identifier) that defenders can use to trace attacker infrastructure and cluster malicious enrollments, and notes Faronics' response to disrupt abuse after Huntress's disclosure.

Faronics DeployScreenConnectPowerShell+2

ScriptRunner.logck identifierfileportals.gytgtecg[.]xyz

Threat Intel, Blue Team & Detection· Added 5 Sep 2026, published 31 Aug 2026

endorlabs.comwriteup🛡️ Security

Mini Shai-Hulud worm hits openapi-react-query-codegen, spreads across npm, RubyGems, and PyPI | Blog | Endor Labs

Endor Labs researchers document a 'Mini Shai-Hulud' worm variant that compromised the openapi-react-query-codegen npm package and self-replicated across npm, expanding into RubyGems and PyPI ecosystems. The writeup traces how the worm trojanized a legitimate package to propagate malicious code cross-registry, illustrating an evolving multi-ecosystem software supply-chain attack pattern.

npmPyPIRubyGems+1

Shai-Hulud

Supply Chain· Added 3 Sep 2026, published 31 Aug 2026

arcticwolf.comwriteup🛡️ Security

Dark Caracal Reloaded: GoCaracal — New Go Malware With Ethereum-Based C2 Fallback

Arctic Wolf Labs documents GoCaracal, a previously undocumented modular Go-based malware framework attributed with medium confidence to Dark Caracal (linked to Lebanon's GDGS), deployed alongside an updated Bandook variant in a June 2026 intrusion against a Venezuelan communications organization. The extended GoCaracal build features a novel Ethereum smart-contract (BulletproofC2) fallback that lets operators update C2 addresses via on-chain transactions without redeploying malware, and analysis of 249 samples traces the framework's four-phase development from January to July 2026. The report includes delivery-chain details (SVG phishing, URL shorteners, Delphi loader), infrastructure analysis (AEZA Group, AlexHost hosting), a YARA rule, and IOCs for detection.

GoEthereumSolidity+1

Dark CaracalGoCaracalBandook+6

Threat Intel, Malware & RE, Blockchain· Added 26 Sep 2026, published 26 Aug 2026

embracethered.comwriteup🛡️ Security

Recovering Encrypted LLM Reasoning Traces

Embrace The Red reproduces the "Stealing Reasoning Traces from Proprietary LLM APIs" attack against OpenAI GPT-5.6 Sol. An encrypted reasoning blob from Codex session files is replayed to GPT-5.6 Luna, across sessions and accounts, with a transcription jailbreak, and a password in the original trace is recovered. The paper decoded 315,320 public reasoning blocks and found 367 PII items and 182 credentials, so shared session files leak more than expected.

OpenAICodexLLM+1

GPT-5.6 SolMatthew GreenStealing Reasoning Traces from Proprietary LLM APIs+1

AI Security· Added 29 Oct 2026, published 17 Aug 2026

xbow.comwriteup🛡️ Security

XBOW: A Shell Is Worth a Thousand Images

XBOW's autonomous AI agent chained a blind SSRF in Bing's reverse-image-search into three Critical Microsoft RCEs (CVE-2026-32194, CVE-2026-32191, CVE-2026-21536), each CVSS 9.8, by fingerprinting an ImageMagick-compatible backend through differential error responses and crafting an SVG payload that reached a shell-backed image delegate. The proof was confirmed via out-of-band callbacks showing NT AUTHORITY\SYSTEM and root execution across multiple production Bing image-processing workers on both Windows and Linux hosts. The piece walks through the full investigative trace — from ruling out XXE to fingerprinting ImageMagick coders/pseudo-protocols to constructing the pipe-based SVG exploit — and argues that ImageTragick-class bugs in "boring" image helpers remain a live, underrated attack surface.

XBOWImageMagickBing+1

CVE-2026-32194CVE-2026-32191CVE-2026-21536+3

AppSec, AI Security, Offensive Security· Published and added 8 Aug 2026

huntress.comwriteup🛡️ Security

Mac Malware Drains Crypto Wallets Via Fake CAPTCHA Scam

Huntress details a macOS incident where a victim ran a ClickFix fake-CAPTCHA Terminal command that chained a Bash profiler/loader into a Go-based Mach-O stealer. The malware harvests Keychain, browser password stores, and cached credentials, establishes persistence via a fake SoftwareUpdate LaunchAgent and BTM, uses osascript to phish the user's password, and includes a DRAIN function that checks crypto wallet balances (BTC, LTC, DOGE, ETH, XRP, Monero) and siphons a configurable percentage or the full balance to attacker wallets. All infrastructure (loader hosting, payload hosting, C2 on port 8133) traces back to Aeza Group, a sanctioned Russian bulletproof hosting provider.

macOSGoVirusTotal+1

Aeza Grouposascriptlaunchctl+2

Malware & RE, Threat Intel· Added 3 Sep 2026, published 6 Aug 2026

huntress.comwriteup🛡️ Security

Reverse Engineering the Six Stages of MacSync Stealer and RAT

Huntress reverse-engineers MacSync, a macOS stealer-and-RAT chain delivered via a weaponised claude.ai share link promoted through Google Ads malvertising, where a victim searching for how to install Claude on a Mac pastes a curl piped to zsh one-liner. The writeup traces all six stages: a polymorphic zsh loader, a server-side AppleScript that social-engineers Full Disk Access and validates the account password via dscl authonly, keychain and browser Safe Storage theft, a statically-linked C++ Mach-O RAT with WebSocket and AES-CBC C2 plus LaunchAgent persistence disguised as legitimate updaters, a signed Screen Recording-badged helper that phishes the TCC screen-capture permission, and trojanised Electron wallet apps (Ledger Live and Ledger Wallet) that inject a fake recovery-phrase phishing flow. It ties the kit to the AMOS and Atomic Stealer lineage via Russian-language code comments and shared infrastructure, and documents concrete IOCs including domains, C2 IP, mutex naming, and plist patterns for defenders.

macOSClaudeGhidra+3

MacSyncAMOS stealerSectopRAT

Malware & RE, Threat Intel· Added 3 Sep 2026, published 29 Jul 2026

socket.devwriteup🛡️ Security

Socket: GitHub Actions Abuse Powers Distributed cPanel/WHM Exploitation Campaign

Socket researchers traced malicious dev versions of ten Packagist packages owned by developer dinushchathurya back to compromised GitHub repositories containing 55-62 malicious GitHub Actions workflow files each. The workflows execute on GitHub-hosted Ubuntu runners on every push, download an architecture-matched Linux payload from C2 server 43.228.157.68, and run an internet scanner (`ipscan --exploit CVE-2026-41940`) that exploits an authentication bypass in cPanel/WHM and harvests cloud, database, SSH, and source-control credentials, exfiltrating results via heartbeat/results HTTP endpoints and DNSHook callbacks. GitHub code search for the campaign's unique markers returned 6,100-16,000 matching workflow files across unrelated repositories, indicating the abuse extends far beyond the one compromised maintainer and effectively weaponizes GitHub Actions as free, disposable attack infrastructure.

GitHub ActionsPackagistPHP+2

CVE-2026-41940dinushchathuryaDNSHook+4

Supply Chain, DevSecOps, Threat Intel· Published and added 23 Jul 2026

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