SANS Stormcast Thursday, April 24th: Honeypot Iptables Maintenance; XRPL.js Compromise; Erlang/OTP SSH Vuln Affecting Cisco (#) SANS Internet Storm Center's Daily Network Security News podcast

7:16

SANS Stormcast Thursday, May 1st: More Steganography; Malicious Python Packages GMail C2; BEC to Steal Rent Payments Steganography Analysis With pngdump.py: Bitstreams More details from Didiear as to how to extract binary content hidden inside images https://isc.sans.edu/diary/Steganography%20Analysis%20With%20pngdump.py%3A%20Bitstreams/31904 Using Trusted Protocols Against You: Gmail as a C2 Mechanism Attackers are using typosquatting to trick developers into installing malicious python packages. These python packages will use GMail as a command and control channel by sending email to hard coded GMail accounts https://socket.dev/blog/using-trusted-protocols-against-you-gmail-as-a-c2-mechanism Security Brief: French BEC Threat Actor Targets Property Payments A French business email compromise threat actor is targeting property management firms to send emails to tenents tricking them into sending rent payments to fake bank accounts https://www.proofpoint.com/us/blog/threat-insight/security-brief-french-bec-threat-actor-targets-property-payments SANS.edu Research Journal https://isc.sans.edu/j/research keywords: Steganograpy; Research Journal; bec; tenants; rent; gmail; python…

SANS Internet Storm Center's Daily Network Security News Podcast

1
SANS Stormcast Thursday, May 1st: Sonicwall Attacks; Cached Windows RDP Credentials (#) 6:29

1 day ago6:29

6:29

SANS Stormcast Thursday, May 1st: Sonicwall Attacks; Cached Windows RDP Credentials Web Scanning for Sonicwall Vulnerabilities CVE-2021-20016 For the last week, scans for Sonicwall API “login” and “domain” endpoints have skyrocketed. These attacks may be exploiting an older vulnerability or just attempting to brute force credentials. https://isc.sans.edu/diary/Web%20Scanning%20Sonicwall%20for%20CVE-2021-20016/31906 The Wizards APT Group SLAAC Spoofing Adversary in the Middle Attacks ESET published an article with details regarding an IPv6-linked attack they have observed. Attackers use router advertisements to inject fake recursive DNS servers that are used to inject IP addresses for hostnames used to update software. This leads to the victim downloading malware instead of legitimate updates. https://www.welivesecurity.com/en/eset-research/thewizards-apt-group-slaac-spoofing-adversary-in-the-middle-attacks/ Windows RDP Access is Possible with Old Credentials Credential caching may lead to Windows allowing RDP logins with old credentials. https://arstechnica.com/security/2025/04/windows-rdp-lets-you-log-in-using-revoked-passwords-microsoft-is-ok-with-that/?comments-page=1#comments keywords: Sonicwall; Windows; RDP; SLAAC; IPv6;…

SANS Internet Storm Center's Daily Network Security News Podcast

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SANS Stormcast Wednesday, April 30th: SMS Attacks; Apple Airplay Vulnerabilities (#) 8:52

3 days ago8:52

8:52

SANS Stormcast Wednesday, April 30th: SMS Attacks; Apple Airplay Vulnerabilities More Scans for SMS Gateways and APIs Attackers are not just looking for SMS Gateways like the scans we reported on last week, but they are also actively scanning for other ways to use APIs and add on tools to send messages using other people’s credentials. https://isc.sans.edu/diary/More%20Scans%20for%20SMS%20Gateways%20and%20APIs/31902 AirBorne: AirPlay Vulnerabilities Researchers at Oligo revealed over 20 weaknesses they found in Apple’s implementation of the AirPlay protocol. These vulnerabilities can be abused to execute code or launch denial-of-service attacks against affected devices. Apple patched the vulnerabilities in recent updates. https://www.oligo.security/blog/airborne keywords: SMS; Airplay…

SANS Internet Storm Center's Daily Network Security News Podcast

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SANS Stormcast Tuesday, April 29th: SRUM-DUMP 3; Policy Puppetry; Choice Jacking; @sansinstitute at #RSAC (#) 7:37

4 days ago7:37

7:37

SANS Stormcast Tuesday, April 29th: SRUM-DUMP 3; Policy Puppetry; Choice Jacking; @sansinstitute at #RSAC SRUM-DUMP Version 3: Uncovering Malware Activity in Forensics Mark Baggett released SRUM-DUMP Version 3. The tool simplifies data extraction from Widnows’ System Resource Usage Monitor (SRUM). This database logs how much resources software used for 30 days, and is invaluable to find out what software was executed when and if it sent or received network data. https://isc.sans.edu/diary/SRUM-DUMP%20Version%203%3A%20Uncovering%20Malware%20Activity%20in%20Forensics/31896 Novel Universal Bypass For All Major LLMS Hidden Layer discovered a new prompt injection technique that bypasses security constraints in large language models. The technique uses an XML formatted prequel for a prompt, which appears to the LLM as a policy file. This “Policy Puppetry” can be used to rewrite some of the security policies configured for LLMs. Unlike other techniques, this technique works across multiple LLMs without changing the policy. https://hiddenlayer.com/innovation-hub/novel-universal-bypass-for-all-major-llms/ CHOICEJACKING: Compromising Mobile Devices through Malicious Chargers like a Decade ago The old “Juice Jacking” is back, at least if you do not run the latest version of Android or iOS. This issue may allow a malicious USB device, particularly a USB charger, to take control of a device connected to it. https://pure.tugraz.at/ws/portalfiles/portal/89650227/Final_Paper_Usenix.pdf SANS @RSA: https://www.sans.org/mlp/rsac/ keywords: SRUM; windows; forensics; llms; policy; puppetry; choice jacking; usb; chargers…

SANS Internet Storm Center's Daily Network Security News Podcast

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SANS Stormcast Monday, April 27th: Image Steganography; SAP Netweaver Exploited (#) 7:56

5 days ago7:56

7:56

SANS Stormcast Monday, April 27th: Image Steganography; SAP Netweaver Exploited Example of a Payload Delivered Through Steganography Xavier and Didier published two diaries this weekend, building on each other. First, Xavier showed an example of an image being used to smuggle an executable past network defenses, and second, Didier showed how to use his tools to extract the binary. https://isc.sans.edu/diary/Example%20of%20a%20Payload%20Delivered%20Through%20Steganography/31892 SAP Netweaver Exploited CVE-2025-31324 An arbitrary file upload vulnerability in SAP’s Netweaver product is actively exploited to upload webshells. Reliaquest discovered the issue. Reliaquest reports that they saw it being abused to upload the Brute Ratel C2 framework. Users of Netweaver must turn off the developmentserver alias and disable visual composer, and the application was deprecated for about 10 years. SAP has released an emergency update for the issue. https://reliaquest.com/blog/threat-spotlight-reliaquest-uncovers-vulnerability-behind-sap-netweaver-compromise/ https://onapsis.com/blog/active-exploitation-of-sap-vulnerability-cve-2025-31324/ Any.Run Reports False Positive Uploads Due to false positives caused by MS Defender XDR flagging Adobe Acrobat Cloud links as malicious, many users of Any.Run’s free tier uploaded confidential documents to Any.Run. Anyrun blocked these uploads for now but reminded users to be cautious about what documents are being uploaded. https://x.com/anyrun_app/status/1915429758516560190 keywords: any.run; adobe; xdr; microsoft; sap; netweaver; steganography…

SANS Internet Storm Center's Daily Network Security News Podcast

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SANS Stormcast Friday, April 25th: SMS Gateway Scans; Comvault Exploit; Patch Window Shrinkage; More inetpub issues; (#) 6:38

8 days ago6:38

6:38

SANS Stormcast Friday, April 25th: SMS Gateway Scans; Comvault Exploit; Patch Window Shrinkage; More inetpub issues; Attacks against Teltonika Networks SMS Gateways Attackers are actively scanning for SMS Gateways. These attacks take advantage of default passwords and other commonly used passwords. https://isc.sans.edu/diary/Attacks%20against%20Teltonika%20Networks%20SMS%20Gateways/31888 Commvault Vulnerability CVE-2205-34028 Commvault, about a week ago, published an advisory and a fix for a vulnerability in its backup software. watchTowr now released a detailed writeup and exploit for the vulnerability https://labs.watchtowr.com/fire-in-the-hole-were-breaching-the-vault-commvault-remote-code-execution-cve-2025-34028/ Exploitation Trends Q1 2025 Vulncheck published a summary of exploitation trends, pointing out that about a quarter of vulnerabilities are exploited a day after a patch is made available. https://vulncheck.com/blog/exploitation-trends-q1-2025 inetpub directory issues The inetpub directory introduced by Microsoft in its April patch may lead to a denial of service against applying patches on Windows if an attacker can create a junction for that location pointing to an existing system binary like Notepad. https://doublepulsar.com/microsofts-patch-for-cve-2025-21204-symlink-vulnerability-introduces-another-symlink-vulnerability-9ea085537741 keywords: inetpub; vulncheck; patches; watchTowr; teltonika; sms…

SANS Internet Storm Center's Daily Network Security News Podcast

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SANS Stormcast Thursday, April 24th: Honeypot iptables Maintenance; XRPL.js Compromise; Erlang/OTP SSH Vuln affecting Cisco (#) 5:45

9 days ago5:45

5:45

SANS Internet Storm Center's Daily Network Security News Podcast

1
SANS Stormcast Wednesday, April 23rd: More xorsearch Updates; DKIM Replay Attack; SSL.com Vulnerability Fixed (#) 6:18

10 days ago6:18

6:18

SANS Stormcast Wednesday, April 23rd: More xorsearch Updates; DKIM Replay Attack; SSL.com Vulnerability Fixed xorsearch.py: Ad Hoc YARA Rules Adhoc YARA rules allow for easy searches using command line arguments without having to write complete YARA rules for simple use cases like string and regex searches https://isc.sans.edu/diary/xorsearch.py%3A%20%22Ad%20Hoc%20YARA%20Rules%22/31856 Google Spoofed via DKIM Replay Attack DKIM replay attacks are a known issue where the attacker re-uses a prior DKIM signature. This will work as long as the headers signed by the signature are unchanged. Recently, this attack has been successful against Google. https://easydmarc.com/blog/google-spoofed-via-dkim-replay-attack-a-technical-breakdown/ SSL.com E-Mail Validation Bug SSL.com did not properly verify which domain a particular email address is authorized to receive certificates for. This could have been exploited against webmail providers. https://bugzilla.mozilla.org/show_bug.cgi?id=1961406 keywords: dmarc, dkim; google; replay; ad-hoc; yara; xorsearch…

SANS Internet Storm Center's Daily Network Security News Podcast

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SANS Stormcast Tuesday, April 22nd: Phishing via Google; ChatGPT Fingerprint; Asus AI Cloud Vuln; PyTorch RCE (#) 5:35

11 days ago5:35

5:35

SANS Stormcast Tuesday, April 22nd: Phishing via Google; ChatGPT Fingerprint; Asus AI Cloud Vuln; PyTorch RCE It's 2025, so why are malicious advertising URLs still going strong? Phishing attacks continue to take advantage of Google’s advertising services. Sadly, this is still the case for obviously malicious links, even after various anti-phishing services flag the URL. https://isc.sans.edu/diary/It%27s%202025...%20so%20why%20are%20obviously%20malicious%20advertising%20URLs%20still%20going%20strong%3F/31880 ChatGPT Fingerprinting Documents via Unicode ChatGPT apparently started leaving fingerprints in texts, which it creates by adding invisible Unicode characters like non-breaking spaces. https://www.rumidocs.com/newsroom/new-chatgpt-models-seem-to-leave-watermarks-on-text Asus AI Cloud Security Advisory Asus warns of a remote code execution vulnerability in its routers. The vulnerability is related to the AI Cloud feature. If your router is EoL, disabling the feature will mitigate the vulnerability https://www.asus.com/content/asus-product-security-advisory/ PyTorch Vulnerability PyTorch fixed a remote code execution vulnerability exploitable if a malicious model was loaded. This issue was exploitable even with the “weight_only=True" setting selected https://github.com/pytorch/pytorch/security/advisories/GHSA-53q9-r3pm-6pq6 keywords: pytorch; ai cloud; asus; phishing; google…

SANS Internet Storm Center's Daily Network Security News Podcast

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ANS Stormcast Monday, April 21st: MSFT Entra Lockouts; Erlang/OTP SSH Exploit; Sonicwall Exploit; bubble.io bug (#) 7:31

12 days ago7:31

7:31

ANS Stormcast Monday, April 21st: MSFT Entra Lockouts; Erlang/OTP SSH Exploit; Sonicwall Exploit; bubble.io bug Microsoft Entra User Lockout Multiple organizations reported widespread alerts and account lockouts this weekend from Microsoft Entra. The issue is caused by a new feature Microsoft enabled. This feature will lock accounts if Microsoft believes that the password for the account was compromised. https://www.bleepingcomputer.com/news/microsoft/widespread-microsoft-entra-lockouts-tied-to-new-security-feature-rollout/ https://learn.microsoft.com/en-us/entra/identity/authentication/feature-availability Erlang/OTP SSH Exploit An exploit was published for the Erlang/OTP SSH vulnerability. The vulnerability is easy to exploit, and the exploit and a Metasploit module allow for easy remote code execution. https://github.com/exa-offsec/ssh_erlangotp_rce/blob/main/ssh_erlangotp_rce.rb Sonicwall Exploited An older command injection vulnerability is now exploited on Sonicwall devices after initially gaining access by brute-forcing credentials. https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0022 Unpatched Vulnerability in Bubble.io An unpatched vulnerability in the no-code platform bubble.io can be used to access any project hosted on the site. https://github.com/demon-i386/pop_n_bubble keywords: bubble; no-code; bubble.io; sonicwall; ssh; erlang; microsoft; entra…

SANS Internet Storm Center's Daily Network Security News Podcast

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SANS Stormcast Friday, April 18th: Remnux Cloud Environment; Erlang/OTP SSH Vuln; Brickstorm Backdoor Analysis; GPT 4.1 Safety Controversy (#) 6:19

15 days ago6:19

6:19

SANS Stormcast Friday, April 18th: Remnux Cloud Environment; Erlang/OTP SSH Vuln; Brickstorm Backdoor Analysis; GPT 4.1 Safety Controversy RedTail: Remnux and Malware Management A description showing how to set up a malware analysis in the cloud with Remnux and Kasm. RedTail is a sample to illustrate how the environment can be used. https://isc.sans.edu/diary/RedTail%2C%20Remnux%20and%20Malware%20Management%20%5BGuest%20Diary%5D/31868 Critical Erlang/OTP SSH Vulnerability Researchers identified a critical vulnerability in the Erlang/OTP SSH library. Due to this vulnerability, SSH servers written in Erlang/OTP allow arbitrary remote code execution without prior authentication https://www.openwall.com/lists/oss-security/2025/04/16/2 Brickstorm Analysis An analysis of a recent instance of the Brickstorm backdoor. This backdoor used to be more known for infecting Linux systems, but now it also infects Windows. https://www.nviso.eu/blog/nviso-analyzes-brickstorm-espionage-backdoor https://blog.nviso.eu/wp-content/uploads/2025/04/NVISO-BRICKSTORM-Report.pdf OpenAI GPT 4.1 Controversy OpenAI released its latest model, GPT 4.1, without a safety report and guardrails to prevent malware creation. https://opentools.ai/news/openai-stirs-controversy-with-gpt-41-release-lacking-safety-report keywords: openai; safety; malware; brickstorm; erlang; ssh; redtail; kasm; docker; container; aws; remnux…

SANS Internet Storm Center's Daily Network Security News Podcast

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SANS Stormcast Thursday April 17th: Apple Updates; Oracle Updates; Google Chrome Updates; CVE News; (#) 6:05

16 days ago6:05

6:05

SANS Stormcast Thursday April 17th: Apple Updates; Oracle Updates; Google Chrome Updates; CVE News; Apple Updates Apple released updates for iOS, iPadOS, macOS, and VisionOS. The updates fix two vulnerabilities which had already been exploited against iOS. https://isc.sans.edu/diary/Apple%20Patches%20Exploited%20Vulnerability/31866 Oracle Updates Oracle released it quarterly critical patch update. The update addresses 378 security vulnerabilities. Many of the critical updates are already known vulnerabilities in open-source software like Apache and Nginx ingress. https://www.oracle.com/security-alerts/cpuapr2025.html Oracle Breach Guidance CISA released guidance for users affected by the recent Oracle cloud breach. The guidance focuses on the likely loss of passwords. https://www.cisa.gov/news-events/alerts/2025/04/16/cisa-releases-guidance-credential-risks-associated-potential-legacy-oracle-cloud-compromise Google Chrome Update A Google Chrome update released today fixes two security vulnerabilities. One of the vulnerabilities is rated as critical. https://chromereleases.googleblog.com/2025/04/stable-channel-update-for-desktop_15.html CVE Updates CISA extended MITRE’s funding to operate the CVE numbering scheme. However, a number of other organizations announced that they may start alternative vulnerability registers. https://euvd.enisa.europa.eu/ https://gcve.eu/ https://www.thecvefoundation.org/ keywords: cve; cisa; mitre; chrome; google; oracle; apple…

SANS Internet Storm Center's Daily Network Security News Podcast

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SANS Stormcast Wednesday Apr 16th: File Upload Service Abuse; OpenSSH 10.0 Released; Apache Roller Vuln; Possible CVE Changes (#) 5:54

17 days ago5:54

5:54

SANS Stormcast Wednesday Apr 16th: File Upload Service Abuse; OpenSSH 10.0 Released; Apache Roller Vuln; Possible CVE Changes Online Services Again Abused to Exfiltrate Data Attackers like to abuse free online services that can be used to exfiltrate data. From the “originals”, like pastebin, to past favorites like anonfiles.com. The latest example is gofile.io. As a defender, it is important to track these services to detect exfiltration early https://isc.sans.edu/diary/Online%20Services%20Again%20Abused%20to%20Exfiltrate%20Data/31862 OpenSSH 10.0 Released OpenSSH 10.0 was released. This release adds quantum-safe ciphers and the separation of authentication services into a separate binary to reduce the authentication attack surface. https://www.openssh.com/releasenotes.html#10.0p1 Apache Roller Vulnerability Apache Roller addressed a vulnerability. Its CVSS score of 10.0 appears inflated, but it is still a vulnerability you probably want to address. https://lists.apache.org/thread/4j906k16v21kdx8hk87gl7663sw7lg7f CVE Funding Changes Mitre’s government contract to operate the CVE system may run out tomorrow. This could lead to a temporary disruption of services, but the system is backed by a diverse board of directors representing many large companies. It is possible that non-government funding sources may keep the system afloat for now. https://www.cve.org/ keywords: cve; mitre; apache; roller; openssh; gofile…

SANS Internet Storm Center's Daily Network Security News Podcast

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SANS Stormcast Tuesday April 15th: xorsearch Update; Short Lived Certificates; New USB Malware (#) 5:35

18 days ago5:35

5:35

SANS Stormcast Tuesday April 15th: xorsearch Update; Short Lived Certificates; New USB Malware xorsearch Update Diedier updated his "xorsearch" tool. It is now a python script, not a compiled binary, and supports Yara signatures. With Yara support also comes support for regular expressions. https://isc.sans.edu/diary/xorsearch.py%3A%20Searching%20With%20Regexes/31854 Shorter Lived Certificates The CA/Brower Forum passed an update to reduce the maximum livetime of certificates. The reduction will be implemented over the next four years. EFF also released an update to certbot introducing profiles that can be used to request shorter lived certificates. https://www.eff.org/deeplinks/2025/04/certbot-40-long-live-short-lived-certs https://groups.google.com/a/groups.cabforum.org/g/servercert-wg/c/bvWh5RN6tYI New Malware Harvesting Data from USB drives and infecting them. Kaspersky is reporting that they identified new malware that not only harvests data from USB drives, but also spread via USB drives by replacing existing documents with malicious files. https://securelist.com/goffee-apt-new-attacks/116139/ keywords: goffee; usb; malware; russia; kaspersky; certificates; certbot; eff; xorsearch; yara…

SANS Internet Storm Center's Daily Network Security News Podcast

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SANS Stormcast Monday April 14th: Langlow AI Attacks; Fortinet Attack Cleanup; MSFT Inetpub; (#) 7:08

19 days ago7:08