Search: “tls”

13 stories in the last 3d

Research shows Model Context Protocol agent traffic structurally resembles C2 beaconing and evades Suricata signatures and RITA behavioral scoring in testbeds.

An arXiv study demonstrates that Model Context Protocol (MCP) JSON-RPC traffic over Streamable HTTP mimics the polling patterns of C2 frameworks like Cobalt Strike and is not flagged as anomalous by standard enterprise defenses. In a Docker testbed with eleven traffic profiles across three TLS conditions, Suricata with the Emerging Threats Open ruleset produced near-zero alerts and RITA assigned a consistent 0.0 beacon score, regardless of jitter or TLS inspection. The authors propose an agent-native network indication standard using Agent-Native ALPN and out-of-band headers.

arXiv cs.CRSep 16, 17:27 UTC · 19h agoResearch1

MacOS 27 - First Boot, (Tue, Sep 15th)

SANS ISC documents the expected network traffic macOS 27 'Golden Gate' generates on first boot to help defenders baseline their networks.

Johannes Ullrich of SANS Internet Storm Center captured roughly 300 packets from a macOS 27 'Golden Gate' system before user login, covering DHCP, IPv6 duplicate address discovery, DNS, and TCP behavior. macOS 27 resolves hostnames like albert.apple.com (device activation, certificate-pinned), push messaging hosts, and ipv4only.arpa for NAT64 networks. The OS still uses a TCP window scale of 6, ECN, and random timestamps, with only four TCP connections observed during boot. The analysis provides a reference baseline for security teams monitoring Apple endpoints.

SANS Internet Storm CenterSep 15, 15:23 UTC · 1d agoResearch

CVE-2026-59969: Apache ZooKeeper: Improper validation of certificate with host mismatch in FIPS mode

CVE-2026-59969: Apache ZooKeeper quorum TLS skips peer hostname verification in FIPS-mode deployments, enabling potential server-to-server impersonation.

Apache ZooKeeper versions 3.8.0-3.8.6 and 3.9.0-3.9.5 fail to enforce peer hostname verification for quorum TLS when FIPS mode is enabled with sslQuorum, zookeeper.fips-mode, and hostname verification settings turned on. The flaw is rated important and could allow an attacker to impersonate a quorum peer via certificate host mismatch. Users should upgrade to fixed versions.

oss-securitySep 15, 18:23 UTC · 1d agoVulnerability CVE-2026-59969

Siemens Reyrolle 7SR5

CISA advisory covers 14 vulnerabilities, CVSS 9.8, in Siemens Reyrolle 7SR5 energy-sector protection relays before V2.70.

CISA advisory ICSA-26-258-05 covers 14 vulnerabilities in Siemens Reyrolle 7SR5 protection relays before V2.70, used in the energy sector worldwide, with aggregate CVSS v3 of 9.8. Flaws include Cesanta Mongoose web server issues (CVE-2024-42384 through CVE-2024-42392) and new bugs such as web-interface session-ID exposure enabling authentication bypass (CVE-2026-62645, CVSS 9.8), predictable session tokens (CVE-2026-62646, CVE-2026-62647), and pre-auth out-of-bounds writes (CVE-2026-62648). Siemens has released V2.70 and recommends updating to the latest version.

CISA AdvisoriesSep 15, 12:00 UTC · 2d agoAdvisory CVE-2024-42384 CVE-2024-42385 CVE-2024-42386+11 CVEs

HBO Max Reddit Account Hijacked to Spread PasteSwitch ClickFix Malware

Hijacked HBO Max verified Reddit account ran 108 ClickFix malvertising ads delivering AMOS and Amatera stealers plus crypto clippers to macOS and Windows users.

Threat actors hijacked HBO Max's verified Reddit account (u/hbomax) to run 108 malicious ClickFix ads over 48 hours in a campaign tracked as PasteSwitch, researched by Hudson Rock and ADAMnetworks. macOS victims were served curl | zsh chains deploying MacSync and Atomic macOS Stealer (AMOS), which harvest browser credentials, Telegram data, Apple Notes, and macOS passwords, while fake Ledger, Trezor, and Exodus apps targeted BIP39 seed phrases. Windows users received an InstallFix chain using an MP3/HTA polyglot with mshta and PowerShell, scheduled-task persistence, AMSI disabling, and in-memory Amatera Stealer that hid C2 traffic (77.91.65.13:443) behind a facebook.com TLS SNI. AnimateClipper and ZigClipper components swapped copied crypto wallet addresses and used Binance Smart Chain contracts as mutable C2 dead drops; Reddit paused the ads and the initial access path remains undisclosed.

GBHackersupdated Sep 15, 11:51 UTC · 2d agofirst Sep 15, 05:22 UTC · 2d agoMalware 7 sources

FamousSparrow Exploits Public-Facing Exchange Servers to Deploy SparroWocky Backdoor

ESET attributes a new SparroWocky backdoor to espionage group FamousSparrow, deployed via exploited internet-facing Exchange servers across Latin American governments.

ESET's Welivesecurity team reports FamousSparrow gained initial access by exploiting publicly reachable Microsoft Exchange servers, with roughly 90 percent of targets since mid-2025 in Latin America, including governments in Argentina, Ecuador, Guatemala, Honduras, Panama, Peru, Puerto Rico, and Venezuela. The group's new modular C-language backdoor SparroWocky replaces SparrowDoor and uses a three-part loader: a legitimate executable, a malicious DLL side-loaded in memory, and an encrypted payload. It persists via Windows services or Registry Run keys, supports screenshots, file operations, TCP proxying, Beacon Object Files, TLS/RC4-encrypted C2, and anti-forensics such as call-stack spoofing. IOCs including loader SHA-1 hashes and C2 IP addresses were published.

Cyber Security News11:20 UTC · 1h agoThreat actor in the wild 3 sources

Cyclops Blink Evolves Into x86-64 Linux Implant With Packet Sniffing and Internal Network Scanning

Sophos uncovers a new x86-64 Cyclops Blink Linux implant with packet sniffing and internal network scanning on compromised Cisco FMC appliances.

Sophos identified a 64-bit Linux Cyclops Blink implant in August on compromised Cisco Firewall Management Center devices, persisting via SysV init scripts and masquerading as the process 'kworker01'. The modular malware runs five child processes for reconnaissance, file transfer, scanning, packet capture, and persistence, and beacons hourly over outbound TLS to hardcoded C2 89.34.96.56 on ports 43856 and 49172. The family was previously tied to Russian-linked Sandworm activity on WatchGuard appliances, though Sophos treats 2026 attribution cautiously. The packet-capture module applies configurable filters to retain credentials, cookies, and authentication tokens from raw Ethernet traffic.

Cyber Security NewsSep 14, 13:33 UTC · 2d agoMalware in the wild

The Odyssey and trojans again: MovieReaper attacks users in multiple countries via compromised torrentsnew

Kaspersky uncovers MovieReaper, a multi-stage malware framework spread via compromised itorrents.org torrent files, hitting hundreds of users.

In mid-August 2026 Kaspersky identified a campaign distributing an unknown loader disguised as movies such as 'the odyssey (2026) [1080p] [webrip] [5.1].exe' (MD5 A0B13781EDD7CFDAB13D79AFFF3C83C1) through torrent trackers. The attackers compromised the itorrents[.]org torrent-file repository rather than the trackers themselves, so multiple platforms delivered malicious torrents; the repository remained compromised at publication. Several hundred victims, including individuals and organizations in Russia, Türkiye, Japan, Kenya, Uganda, Colombia and several European countries, were infected with the modular MovieReaper framework, detected as HEUR:Trojan.Win64.Agent.gen. The loader fetches shellcode from deadhub[.]org (fallback IP 193.23.118[.]155), maps it into RWX memory, and uses PEB traversal, encrypted strings and direct syscalls to evade sandboxes.

Kaspersky Securelist13:00 UTC · 11m agoMalware in the wild

One Compromised Kubernetes Node Can Expose Every Workload Identity Running on It

Unit42 researchers show a root attacker on a Kubernetes node can manipulate cgroups to make the local SPIRE agent issue other workloads' identities.

Palo Alto Networks Unit42 demonstrated that an attacker with root access on a Kubernetes node can alter Linux cgroup data so the local SPIRE agent matches a target pod's selectors and issues its SVID to an attacker-controlled process. The technique affects SPIFFE/SPIRE deployments, which assume node trustworthiness, and means every workload identity on a compromised node should be considered exposed. Researchers have not observed the method in the wild and released Spooffe, a testing tool to measure node identity exposure.

Cyber Security News11:02 UTC · 2h agoResearch 2 sources

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software for Secure Firewall 3100 and 4200 Series DTLS Denial of Service Vulnerability

Cisco patched a DTLS flaw in ASA and FTD software for Secure Firewall 3100/4200 series letting unauthenticated attackers trigger device reloads.

Improper resource management when processing DTLS messages in Cisco ASA and Secure Firewall Threat Defense software for Secure Firewall 3100 and 4200 series devices allows an unauthenticated remote attacker to cause a denial of service. Exploitation via a crafted stream of DTLS traffic causes the device to reload. Cisco has released software updates.

Cisco Security AdvisoriesSep 16, 16:00 UTC · 21h agoAdvisory 9 sources

Smishing Hackers Can Watch Every Keystroke as Victims Enter Card Details and OTPs

Group-IB details the JWR smishing kit, used by the Outsider cluster, that streams keystrokes and OTPs to fraudsters in real time via WebSocket.

Group-IB linked the JWR phishing kit to an operator cluster it tracks as Outsider within the broader Smishing Triad ecosystem. Fake toll, parcel, and delivery messages lead to live phishing pages that capture card numbers, passwords, and one-time passcodes before victims submit forms. The kit supports up to 32 guided pages, AES-256-CTR wrapped traffic with keys embedded per message, rotating short links and domains, and WordPress or Shopify integration markers, enabling account takeover and unauthorized payments.

Cyber Security NewsSep 16, 13:39 UTC · 23h agoPhishing & fraud in the wild 2 sources

USN-8771-1: Valkey vulnerabilities

Ubuntu issued USN-8771-1 fixing Valkey flaws (CVE-2026-56684, CVE-2026-63639) that allow denial of service or possible code execution.

Ubuntu Security Notice USN-8771-1 patches multiple vulnerabilities in Valkey, the Redis-compatible in-memory data store. CVE-2026-56684, discovered by Madelyn Olson, involves incorrect TLS connection handling that a remote attacker could trigger to crash Valkey or possibly execute arbitrary code. CVE-2026-63639 involves incorrect handling of stream RDB payloads via the RESTORE command, exploitable by an authenticated remote attacker for denial of service or possible code execution. A third flaw in cluster slot migration operations also allows remote attackers to crash the service.

Ubuntu Security Noticesupdated Sep 16, 20:12 UTC · 16h agofirst Sep 16, 04:27 UTC · 1d agoAdvisory 7 sources CVE-2026-56684 CVE-2026-63639

CISA and NIST Release Technical Checklist for Safeguarding Identity Tokens From Theft and Misuse

CISA and NIST published NIST IR 8587, final guidance for protecting identity tokens from forgery, theft, replay, and signing-key compromise.

NIST Interagency Report 8587 (September 15, 2026) expands the IA-13 'Identity Providers and Authorization Servers' control from NIST SP 800-53 R5.1.1, guiding federal agencies and cloud providers on SSO, identity federation, and machine-to-machine authentication. It requires hardware-backed signing-key storage for moderate-impact systems, 90-day key rotation for high-impact systems, token lifetimes under one hour, and sender-constrained mechanisms such as mutual TLS and DPoP. The report cites incidents including forged SAML assertions that exposed over 60,000 emails from a federal agency. It also extends guidance to agentic AI systems using signed tokens and urges post-quantum cryptography migration planning.

Cyber Security NewsSep 15, 17:04 UTC · 1d agoAdvisory1