Windows Defender ATP machine learning and AMSI: Unearthing script-based attacks that ‘live off the land’

Scripts are becoming the weapon of choice of sophisticated activity groups responsible for targeted attacks as well as malware authors who indiscriminately deploy commodity threats. Scripting engines such as JavaScript, VBScript, and PowerShell offer tremendous benefits to attackers. They run...

Clarifying the behavior of mandatory ASLR

Last week, the CERT/CC published an advisory describing some unexpected behavior they observed when enabling system-wide mandatory Address Space Layout Randomization ASLR using Windows Defender Exploit Guard WDEG and EMET on Windows 8 and above. In this blog post, we will explain the configuratio...

Clarifying the behavior of mandatory ASLR

Last week, the CERT/CC published an advisory describing some unexpected behavior they observed when enabling system-wide mandatory Address Space Layout Randomization ASLR using Windows Defender Exploit Guard WDEG and EMET on Windows 8 and above. In this blog post, we will explain the configuratio...

Windows Defender System Guard でシステムのセキュリティを強化し整合性を維持する

本記事は、Windows Security のブログ “Hardening the system and maintaining integrity with Windows Defender System Guard” 2017 年 10 月 23 日 米国...

Windows 8 and later fail to properly randomize every application if system-wide mandatory ASLR is enabled via EMET or Windows Defender Exploit Guard

Overview Microsoft Windows 8 introduced a change in how system-wide mandatory ASLR is implemented. This change requires system-wide bottom-up ASLR to be enabled for mandatory ASLR to receive entropy. Tools that enable system-wide ASLR without also setting bottom-up ASLR will fail to properly...

#AVGater vulnerability does not affect Windows Defender Antivirus, MSE, or SCEP

On November 10, 2017, a vulnerability called AVGater was discovered affecting some antivirus products. The vulnerability requires a non-administrator-level account to perform a restore of a quarantined file. Windows Defender Antivirus and other Microsoft antimalware products, including System...

#AVGater vulnerability does not affect Windows Defender Antivirus, MSE, or SCEP

On November 10, 2017, a vulnerability called AVGater was discovered affecting some antivirus products. The vulnerability requires a non-administrator-level account to perform a restore of a quarantined file. Windows Defender Antivirus and other Microsoft antimalware products, including System...

Detecting reflective DLL loading with Windows Defender ATP

Today's attacks put emphasis on leaving little, if any, forensic evidence to maintain stealth and achieve persistence. Attackers use methods that allow exploits to stay resident within an exploited process or migrate to a long-lived process without ever creating or relying on a file on disk. In...

Detecting reflective DLL loading with Windows Defender ATP

Today's attacks put emphasis on leaving little, if any, forensic evidence to maintain stealth and achieve persistence. Attackers use methods that allow exploits to stay resident within an exploited process or migrate to a long-lived process without ever creating or relying on a file on disk. In...

Windows Defender Exploit Guard: 攻撃表面を縮小して次世代型マルウェアに対抗する

本記事は、Windows Security のブログ “Windows Defender Exploit Guard: Reduce the attack surface against next-generation malware” 2017 年 10 月 23 日 米国...

Windows Defender Exploit Guard: Reduce the attack surface against next-generation malware

Windows Defender Exploit Guard is a new set of intrusion prevention capabilities that ships with the Windows 10 Fall Creators Update. The four components of Windows Defender Exploit Guard are designed to lock down the device against a wide variety of attack vectors and block behaviors commonly us...

Making Microsoft Edge the most secure browser with Windows Defender Application Guard

Innovation in the attack space is constant as adversaries increase in both determination and sophistication. In response to increased investments in defense, attackers are adapting and improving tactics at breakneck speed. The good news is that defenders are also innovating and disrupting long...

Hardening the system and maintaining integrity with Windows Defender System Guard

One of the things we spend a great deal of time thinking about here at Microsoft is how attackers will attempt to persist and evade detection once they’ve successfully compromised a device. With Windows 10 we’ve made it more difficult to find ways to exploit potential entry points, and it’s clear...

Windows Defender Antimalware/Antivirus Signature Definition Check

Windows Defender has an AntiMalware/AntiVirus signature that gets updated continuously. The signature definition has not been updated in more than 1 day. C Tenable Network Security, Inc. include"compat.inc"; if description scriptid103569; scriptversion"1.13";...

Windows Defender Bypass Tricks OS into Running Malicious Code

Researchers have developed a method for bypassing Windows Defender that will allow any malware to execute on a Windows machine. Microsoft, meanwhile, has told the experts that it does not see this as a security issue and will not address the problem in its native antimalware protection. A request...

Announcing the Windows Defender Advanced Threat Protection ISO 27001 audit assessment report

The security and privacy of customer data are our top priority. Our goals are simple: to operate our services with the security and privacy you expect from Microsoft, and to give you accurate assurances about our security and privacy practices. In line with our commitment to provide customers the...

EMET II のさらに先へ - Windows Defender Exploit Guard

本記事は、Security Research & Defense のブログ "Moving Beyond EMET II – Windows Defender Exploit Guard" 2017 年 8 月 9 日 米国時間公開 を翻訳したもので...

Exploit for CVE-2017-8759 detected and neutralized

The September 12, 2017 security updates from Microsoft include the patch for a previously unknown vulnerability exploited through Microsoft Word as an entry vector. Customers using Microsoft advanced threat solutions were already protected against this threat. The vulnerability, classified as...

Cryptocurrency Mining Malware Hosted in Amazon S3 Bucket

As Bitcoin’s price continues to soar beyond $4,000 USD per, cybercriminals are responding in kind by using techniques long reserved for adware, click-fraud and spying to now drop cryptocurrency miners onto compromised computers. The latest incident comes from a rash of drive-by downloads that are...

How to detect and guard based on the CVE-2017-0005 vulnerability of elevation of privileges attack-vulnerability warning-the black bar safety net

One, Foreword 2017 3 on 14 September, Microsoft published a security Bulletin MS17-013, fixes CVE-2017-0005 vulnerability. CVE-2017-0005 vulnerabilities in Windows Win32k Assembly, an attacker using this vulnerability could achieve elevation of Privilege. Partners according to credible reports, w...