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DEFCON: New Red Team Tactic

Evil Fonts deceive a viewer by rendering a different letter than is actually on the disk. Evil Fonts can poison HTML, DOCX, PDFs, and anywhere else you can bring your own fonts. Works great in Windows corporate networks for bypassing security tooling, initial access through JavaScript free click fix (beats mitm web security tooling), and leaving traps around the network to harvest shells.

Imagine thinking you are copying whoami but what is actually on the disk is rm -rf \~

Demos:

(Use desktop)

https://doctoreww.github.io/EvilFontTool/

For the demos, copy and paste the HTML/DOCX to a notepad to remove the evil fonts. For the AI ones imagine your security tooling inspects the benign text on disk, but shows the obviously malicious extortion to the user.

Labs:

https://github.com/DoctorEww/EvilFontTool/blob/main/labs%2FREADME.md

Lab Walkthrough:

https://github.com/DoctorEww/EvilFontTool/blob/main/labs%2Fwalkthrough.md

Some evil font uses:

Tamper homework to make it so students poison AI queries

Poison help desk documentation

Bypass email filters

Clickfix

Beat resume AI filters

submitted by /u/Prize_Region5503
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Analyzing a Multi-Stage PowerShell Payload Chain

I recently analyzed a multi-stage PowerShell payload delivery chain involving heavily obfuscated PowerShell loaders and remotely hosted payloads.

The analysis covers PowerShell deobfuscation, hidden execution, Base64/XOR decoding, a decoy “Verification complete!” prompt, payload delivery, and IOCs.

Initial indicators:

203[.]188[.]171[.]166
dorenzaa[.]com

submitted by /u/anuraggawande
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Flock’s Plans for Rideshare Dashcams and Coaching Police, Revealed

8 August 2026 at 10:30
Plus: A judge rules cell tower dumps unconstitutional, water utility hacks spread to a dozen states, a phishing email opens a missile-parts supplier’s inbox, and a ransomware boss gets 16 years.

Write Once, Shell Everywhere - Turning Arbitrary File Writes into RCE (DEF CON Bug Bounty Village)

Write once, shell everywhere. Sun Microsystems didn't mean it like this.

Talk from today at DEF CON's Bug Bounty Village. Full technique catalog graded for distroless containers, an errno path oracle for black-box target fingerprinting, and three minimal-guessing techniques: bash fd/255, Rails schema_cache.yml deserialization, and a Node.js worker path overwrite without process restart.

submitted by /u/ZealousidealHunter80
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SCTPhantom: An 18-Year-Old SCTP ASCONF Transport Use-After-Free · Tencent Zhuque Lab

Yes, given that the legacy SCT protocol has known security vulnerabilities such as sctphantom, the industry strongly recommends deprecating it and migrating to more secure modern standards to ensure system security.

submitted by /u/thobiso
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tl;dv (Too Lazy; Didn't Validate): 181,874 Meetings Left Wide Open

The meetingscollection has no tenant isolation. Any authenticated tl;dv user can query every meeting across every account on the platform. Each meeting record hands you the creator's email address, the conference ID (which is a joinable Google Meet or Teams room), the provider, the recording status, and timestamps.

I queried the Firestore meetings collection and saw there were 181,874 meeting records belonging to 84,312 unique users across 35,003 email domains.

submitted by /u/kochurshak
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TrustFall: When the Trusted Execution Environment Cannot Be Trusted

ByteRay researchers have published a blog on a set of vulnerabilities they are calling TrustFall, and the findings land hard for any company that treats the Trusted Execution Environment as the part of a device you do not have to worry about.

OP-TEE is the walled-off Secure World that phones, TVs, cars, and industrial gear lean on to guard keys, DRM, and identity, and the whole point of paying for that hardware isolation is the promise that even a compromised operating system cannot reach inside.

TrustFall shows that promise was not as solid as buyers assumed. The researchers found several flaws that let the untrusted side reach into or knock over the Secure World, which is exactly the outcome the design exists to prevent. The bugs have since been fixed upstream, so patched builds are available, but the uncomfortable takeaway for vendors is that the vault they were told to trust had a way in, and "it runs in the TEE" is no longer an answer on its own.

submitted by /u/Emergency_Stable_923
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Can Malware Bypass Your Passkeys? This Week in Scams

7 August 2026 at 12:00

This week in scams and cybersecurity news, 

Passkeys are increasingly replacing passwords because they offer stronger protection against phishing and stolen credentials. But new research shows that malware already running on a device could potentially interfere with certain synced passkeys and hijack protected accounts. 

That does not mean passkeys are broken or that people should stop using them. Instead, the research highlights an important distinction: strong account security still depends on the security of the device holding your credentials. 

Here’s what researchers found, whether passkeys remain safe, and how to protect your accounts. 

Can Malware Bypass Your Passkeys? 

Researchers at Palo Alto Networks recently demonstrated several attack methods targeting Google-synced passkeys used through Chrome on Windows devices. 

According to SecurityWeek, these techniques could allow malware already installed on a computer to impersonate a trusted device or obtain authentication information needed to access certain passkey-protected accounts. 

Key takeaways 

The device must already be infected. An attacker cannot steal your passkey simply by sending you a phishing text or email. 

The research focused on synced passkeys. These credentials are encrypted and synchronized across compatible devices through a cloud account. 

Malware may be able to impersonate a trusted device. Researchers demonstrated methods that could request valid authentication without producing the biometric or device-unlock prompt a user would normally expect. 

More advanced techniques could potentially expose multiple synced passkeys. One method targeted sensitive information that briefly appears in browser memory during device enrollment. 

Google was notified and has reportedly introduced mitigations. The findings came from controlled security research, not evidence of a widespread criminal campaign. 

(SecurityWeek) 

Are Passkeys Still Safe? 

Yes. Passkeys remain more resistant to phishing than traditional passwords. 

Passkeys are tied to the legitimate website or app they were created for, so a fake login page generally cannot trick you into typing or handing over the credential. They also eliminate the risks created by weak and reused passwords. 

This research points to a different threat: malware already operating on your device may try to abuse the systems that store, synchronize, or approve your credentials. 

Think of it this way: a stronger lock still matters, but it cannot fully protect you if an intruder is already inside the house. 

This Week’s Safety Tips 

✓ Use passkeys when available. They still provide stronger protection against phishing and password reuse than traditional passwords. 

✓ Keep your browser, operating system, and security software updated. Updates help close vulnerabilities that malware could exploit. 

✓ Be cautious with unexpected files and downloads. Fake updates, email attachments, and malicious links are common ways malware reaches a device. 

✓ Review your trusted devices and active sessions. Remove devices you no longer recognize or use. 

How McAfee Helps Protect Your Devices and Accounts 

Device security helps detect and block viruses, malware, and other threats that could compromise the device where your passkeys and passwords are stored. 

Web protection helps stop risky websites and malicious downloads before they can install harmful software or steal information. 

Scam Detector identifies suspicious texts, emails, and links that may try to lure you into downloading malware or visiting a fraudulent website. 

Identity Monitoring alerts you if personal information connected to your accounts appears in known data breaches or on the dark web, helping you respond before it can be used for fraud. 

Other Scam and Security News This Week 

Meta AI model reportedly accessed another company’s systems during testing. Meta confirmed that its Muse Spark model exploited a vulnerability after a testing configuration mistakenly gave it access to the internet. The company and its evaluation partner said the incident occurred under unusual testing conditions, and Meta is continuing to investigate. (CNN) 

AI-powered voice phishing reportedly targets major financial firms. Hedge funds and private equity companies were reportedly targeted with “vishing” attacks that used AI-generated voices to impersonate real people and attempt to bypass security processes. At least one company said it detected the attempt before its systems were compromised. (Bloomberg/Gizmodo) 

ChainDrop malware reportedly infects more than 1,300 software packages. Researchers say the self-spreading attack compromised packages distributed through the npm software registry and attempted to steal developer, cloud, and application credentials. Organizations that installed affected versions have been advised to rotate exposed credentials and inspect their systems for unauthorized activity. (BleepingComputer) 

And we’ll be back next week with more scam alerts and cybersecurity news. 

The post Can Malware Bypass Your Passkeys? This Week in Scams appeared first on McAfee Blog.

Dangling DNS record for bastion.certb.cdp.bethesda.net

6 August 2026 at 19:40

Posted by shed riot on Aug 06

# Summary

The hostname resolved to an address within a dynamic cloud IP pool.
The address had been released and was no longer controlled by the
organisation operating the hostname.

This condition is referred to as an "afterlife" issue.

Unlike a conventional CNAME-based subdomain takeover, the DNS record
pointed directly to a reusable cloud IP address. An attacker obtaining
that address could receive traffic intended for the...

CL.0 desync in www.microsoft.com

6 August 2026 at 19:40

Posted by shed riot on Aug 06

# Summary

I reported the issue to the Microsoft Security Response Center twice:

* VULN-165381, MSRC case 102964
* VULN-165876, MSRC case 103259

In both cases, they do not appear to have even looked at the PoCs, and so
have failed to adequately investigate before reaching a decision.

# Vulnerability

CWE-444: HTTP Request/Response Smuggling

The observed behaviour was consistent with CL.0 HTTP desync within the
request-processing chain.

#...
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