Android Update https://source.android.com/security/bulletin/2021-05-01?hl=en Dell Privilege Escalation Vulnerability https://www.dell.com/support/kbdoc/en-us/000186019/dsa-2021-088-dell-client-platform-security-update-for-dell-driver-insufficient-access-control-vulnerability https://labs.sentinelone.com/cve-2021-21551-hundreds-of-millions-of-dell-computers-at-risk-due-to-multiple-bios-driver-privilege-escalation-flaws/ Exim Mail Server Vulnerabilities https://www.qualys.com/2021/05/04/21nails/21nails.txt Quick and Dirty Python: masscan https://isc.sans.edu/forums/diary/Quick+and+dirty+Python+masscan/27384/ ICMP Tunnel Backdoor https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/backdoor-at-the-end-of-the-icmp-tunnel/

Apple Patches 2 0-Day Flaws in WebKit affecting iOS/MacOS/WatchOS https://support.apple.com/en-us/HT201222 PoC Exploit for CVE-2021-28482 (Microsoft Exchange) https://gist.github.com/testanull/9ebbd6830f7a501e35e67f2fcaa57bda https://testbnull.medium.com/microsoft-exchange-from-deserialization-to-post-auth-rce-cve-2021-28482-e713001d915f Yet Another Processor Side-Channel: Micro-Ops Caches http://www.cs.virginia.edu/venkat/papers/isca2021a.pdf Pulse Secure Update https://blog.pulsesecure.net/pulse-connect-secure-patch-availability-sa44784/

Qiling: A true instrumentable binary emulation framework https://isc.sans.edu/forums/diary/Qiling+A+true+instrumentable+binary+emulation+framework/27372/ Python "ipaddress" improper input validation https://sick.codes/sick-2021-014/ EXIF Tool Vulnerabilities https://twitter.com/wcbowling/status/1385803927321415687 ABUS Secvest Internet Connected Alarm Systems https://eye.security/nl/blog/breaking-abus-secvest-internet-connected-alarm-systems-cve-2020-28973 FiveHands Ransomware Installed via SonicWall Flaw https://thehackernews.com/2021/04/hackers-exploit-sonicwall-zero-day-bug.html

From Python to .Net https://isc.sans.edu/forums/diary/From+Python+to+Net/27366/ PHP Composer Vulnerability https://blog.sonarsource.com/php-supply-chain-attack-on-composer Microsoft Identifies Several Integer Overflow Vulnerablities https://us-cert.cisa.gov/ics/advisories/icsa-21-119-04

Stopping Google FLoC https://github.blog/changelog/2021-04-27-github-pages-permissions-policy-interest-cohort-header-added-to-all-pages-sites/ https://amifloced.org RotaJakiro Backdoor https://blog.netlab.360.com/stealth_rotajakiro_backdoor_en/ F5 Big IP Kerberos Spoofing Vulnerablity https://support.f5.com/csp/article/K51213246

Diving into a Singapore Post Phihsing E-Mail https://isc.sans.edu/forums/diary/Diving+into+a+Singapore+Post+Phishing+Email/27356/ Two in Five Victims of Online Scam Adverts Do Not Report to Host Platforms https://www.which.co.uk/news/2021/04/two-in-five-victims-of-online-scam-adverts-dont-report-to-host-platforms/ Microsoft Defender Blocks Cryptojacking Malware https://www.microsoft.com/security/blog/2021/04/26/defending-against-cryptojacking-with-microsoft-defender-for-endpoint-and-intel-tdt/ Linux Privilege Escalation Vulnerability https://talosintelligence.com/vulnerability_reports/TALOS-2020-1211

CAD: .DGN and .MVBA Files analyzed with oledump https://isc.sans.edu/forums/diary/CAD+DGN+and+MVBA+Files/27354/ MacOS 0-Day Bug Patched https://objective-see.com/blog/blog_0x64.html https://support.apple.com/en-us/HT201222 Emotet Uninstaller Triggered https://blog.malwarebytes.com/threat-analysis/2021/01/cleaning-up-after-emotet-the-law-enforcement-file/ HashiCorp Code Signing Key Exposed By Codecov Compromise https://www.theregister.com/2021/04/26/hashicorp_reveals_exposure_of_private/

Compact VBA Macros https://isc.sans.edu/forums/diary/Malicious+PowerPoint+AddOn+Small+Is+Beautiful/27342/ Base64 Strings Used in Web Scanning https://isc.sans.edu/forums/diary/Base64+Hashes+Used+in+Web+Scanning/27346/ Clickstudios Password Manager Compromise https://www.csis.dk/newsroom-blog-overview/2021/moserpass-supply-chain/ Homebrew Code Execution Vulnerability https://brew.sh/2021/04/21/security-incident-disclosure/ Apple AirDrop Shares Personal Data https://www.informatik.tu-darmstadt.de/fb20/ueber_uns_details_231616.en.jsp

How Safe are Your Docker Images https://isc.sans.edu/forums/diary/How+Safe+Are+Your+Docker+Images/27340/ Additional SolarWinds Infrastructure https://www.riskiq.com/blog/external-threat-management/solarwinds-c2-servers-new-tactics/ Cellebrite Exploit https://signal.org/blog/cellebrite-vulnerabilities/ Duo 2FA Bypass https://sensepost.com/blog/2021/duo-two-factor-authentication-bypass/

Linux Kernel Maintainer Calls Out "hypocrite commits" by University of Minnesota https://lore.kernel.org/lkml/[email protected]/ https://github.com/QiushiWu/QiushiWu.github.io/blob/main/papers/OpenSourceInsecurity.pdf https://www-users.cs.umn.edu/~kjlu/papers/clarifications-hc.pdf QNAP QLocker uses 7-Zip https://www.bleepingcomputer.com/news/security/massive-qlocker-ransomware-attack-uses-7zip-to-encrypt-qnap-devices/ Chrome O-Day Fixed https://thehackernews.com/2021/04/update-your-chrome-browser-immediately.html

Pulse Secure VPN 0-Day Exploited https://www.fireeye.com/blog/threat-research/2021/04/suspected-apt-actors-leverage-bypass-techniques-pulse-secure-zero-day.html https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/ SonicWall Vulnerabilities https://www.sonicwall.com/support/product-notification/security-notice-sonicwall-email-security-zero-day-vulnerabilities/210416112932360/ Synology Vulnerability https://blog.talosintelligence.com/2021/04/vuln-spotlight-synology-dsm.html#more Air Fryer Vulnerability https://blog.talosintelligence.com/2021/04/vuln-spotlight-co.html

Hunting Phishing Websites with Favicon Hashes https://isc.sans.edu/forums/diary/Hunting+phishing+websites+with+favicon+hashes/27326/ Nagios XI Vulnerability Exploited by Cryptominers https://unit42.paloaltonetworks.com/nagios-xi-vulnerability-cryptomining/ XCSSET Malware Adapting to MacOS 11 and M1 https://www.trendmicro.com/en_us/research/21/d/xcsset-quickly-adapts-to-macos-11-and-m1-based-macs.html QNAP Patches https://www.qnap.com/de-de/security-advisories?ref=security_advisory_details Juniper Updates https://kb.juniper.net/InfoCenter/index?page=content&channel=SECURITY_ADVISORIES

Decoding Cobalt Strike Traffic https://isc.sans.edu/forums/diary/Decoding+Cobalt+Strike+Traffic/27322/ Codecov Breach https://about.codecov.io/security-update/ Google Project Zero Tweaks Disclosure Rules https://googleprojectzero.blogspot.com EIPStackGroup OpENer Ethernet/IP https://us-cert.cisa.gov/ics/advisories/icsa-21-105-02 DNS Problems with Windows 10 Security Update https://www.bleepingcomputer.com/news/microsoft/mandatory-windows-10-update-causing-dns-and-shared-folder-issues/

Why and How You Should be Using an Internal Certificate Authority https://isc.sans.edu/forums/diary/Why+and+How+You+Should+be+Using+an+Internal+Certificate+Authority/27314/ Vulnerabilities Used By Russian Foreign Intelligence Service https://www.nsa.gov/News-Features/Feature-Stories/Article-View/Article/2573391/russian-foreign-intelligence-service-exploiting-five-publicly-known-vulnerabili/ Insecurity URL Handling https://positive.security/blog/url-open-rce SANS Research Paper: Bryan Scarbrough; Malware Detection in Encrypted TLS Traffic Through Machine Learning https://www.sans.org/reading-room/whitepapers/artificialintelligence/malware-detection-encrypted-tls-traffic-machine-learning-40185

April 2021 Forensics Quiz Solution https://isc.sans.edu/forums/diary/April+2021+Forensic+Quiz+Answers+and+Analysis/27308/ Adobe Patch Tuesday https://helpx.adobe.com/security.html Chrome 90 Released (and 0-Day Exploits) https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_14.html https://github.com/avboy1337/1195777-chrome0day https://github.com/r4j0x00/exploits/tree/master/chrome-0day SAP Updates https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=573801649 Linux/Mac Malware included in npm Module https://blog.sonatype.com/damaging-linux-mac-malware-bundled-within-browserify-npm-brandjack-attempt Congratulations to the SANS.edu National Cyber League Teams! https://twitter.com/SANS_EDU/status/1382453652602941440

Microsoft Patch Tuesday https://isc.sans.edu/forums/diary/Microsoft+April+2021+Patch+Tuesday/27306/ NAME:WRECK DNS Vulnerabilities https://www.forescout.com/research-labs/namewreck/

Example of Cleartext Cobalt Strike Traffic https://isc.sans.edu/forums/diary/Example+of+Cleartext+Cobalt+Strike+Traffic+Thanks+Brad/27300/ ASA 5506 Series Security Appliances Field Notice https://www.cisco.com/c/en/us/support/docs/field-notices/720/fn72019.html Expired Certificate for PulseSecure VPN Devices https://kb.pulsesecure.net/articles/Pulse_Secure_Article/KB44781/?kA13Z000000fzbR Pwn2Own Summary https://thehackernews.com/2021/04/windows-ubuntu-zoom-safari-ms-exchange.html Tesla Exploited Via Google Chrome Vulnerability https://leethax0.rs/2021/04/ElectricChrome/

No Python Interpreter? This Simple RAT Installs Its Own Copy https://isc.sans.edu/forums/diary/No+Python+Interpreter+This+Simple+RAT+Installs+Its+Own+Copy/27292/ Facebook Mistakingly Suggests Adding Domains To Public Suffix List will Ease Tracking https://publicsuffix.org https://www.facebook.com/business/help/331612538028890?id=428636648170202 Facebook Ads Used to Push Clubhouse Related Malware https://www.ehackingnews.com/2021/04/cybercriminals-used-facebook-ads-to.html Identifying Cobalt Strike DNS Intrastructure https://labs.f-secure.com/blog/detecting-exposed-cobalt-strike-dns-redirectors

Simple Powershell Ransomware Creating a 7Z Archive of your Files https://isc.sans.edu/forums/diary/Simple+Powershell+Ransomware+Creating+a+7Z+Archive+of+your+Files/27286/ HTML Lego: Hidden Phishing at Free JavaScript Site https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/html-lego-hidden-phishing-at-free-javascript-site/ Royal FLush: Privilege Escalation Vulnerability in Azure Functions https://www.intezer.com/blog/cloud-security/royal-flush-privilege-escalation-vulnerability-in-azure-functions/ Cisco Small Business Router Vulnerabilities https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-rce-q3rxHnvm Google Chrome Blocking Port 10080 https://github.com/whatwg/fetch/issues/1191#issuecomment-797659444

WiFi IDS's and Private MAC Addresses https://isc.sans.edu/forums/diary/WiFi+IDS+and+Private+MAC+Addresses/27288/ Update on PHP Incident https://externals.io/message/113981 Details about Linux Kernel Bluetooth Vulnerabilities https://google.github.io/security-research/pocs/linux/bleedingtooth/writeup.html LinkedIn Leak https://www.ehackingnews.com/2021/04/data-stolen-from-500-million-linkedin.html VMWare Carbon Black Cloud Workload Applicatnce Authentication Bypass https://www.vmware.com/security/advisories/VMSA-2021-0005.html Cisco SD-WAN vManage Software Vulnerability https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanage-YuTVWqy