From 8a587bce1b900482764fa790b25e6b5d841cd9c8 Mon Sep 17 00:00:00 2001 From: "Andrea Bichsel (Aquent LLC)" Date: Wed, 17 Oct 2018 19:35:10 +0000 Subject: [PATCH 1/4] Corrected ASR rule. --- .../attack-surface-reduction-exploit-guard.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/windows/security/threat-protection/windows-defender-exploit-guard/attack-surface-reduction-exploit-guard.md b/windows/security/threat-protection/windows-defender-exploit-guard/attack-surface-reduction-exploit-guard.md index 18134f19d0..b4994b67e5 100644 --- a/windows/security/threat-protection/windows-defender-exploit-guard/attack-surface-reduction-exploit-guard.md +++ b/windows/security/threat-protection/windows-defender-exploit-guard/attack-surface-reduction-exploit-guard.md @@ -11,7 +11,7 @@ ms.pagetype: security ms.localizationpriority: medium author: andreabichsel ms.author: v-anbic -ms.date: 10/02/2018 +ms.date: 10/17/2018 --- # Reduce attack surfaces with attack surface reduction rules @@ -168,7 +168,7 @@ With this rule, admins can prevent unsigned or untrusted executable files from r - Executable files (such as .exe, .dll, or .scr) - Script files (such as a PowerShell .ps, VisualBasic .vbs, or JavaScript .js file) -### Rule: Block only Office communication applications from creating child processes +### Rule: Block Office communication applications from creating child processes Office communication apps will not be allowed to create child processes. This includes Outlook. From 46c6d7ae13696637bd47a9c0260bff60d31a7913 Mon Sep 17 00:00:00 2001 From: "Andrea Bichsel (Aquent LLC)" Date: Wed, 17 Oct 2018 19:36:01 +0000 Subject: [PATCH 2/4] Corrected ASR rule. --- .../enable-attack-surface-reduction.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/windows/security/threat-protection/windows-defender-exploit-guard/enable-attack-surface-reduction.md b/windows/security/threat-protection/windows-defender-exploit-guard/enable-attack-surface-reduction.md index dd2ed4fda3..2ba64377c3 100644 --- a/windows/security/threat-protection/windows-defender-exploit-guard/enable-attack-surface-reduction.md +++ b/windows/security/threat-protection/windows-defender-exploit-guard/enable-attack-surface-reduction.md @@ -11,7 +11,7 @@ ms.pagetype: security ms.localizationpriority: medium author: andreabichsel ms.author: v-anbic -ms.date: 10/02/2018 +ms.date: 10/17/2018 --- # Enable attack surface reduction rules @@ -46,7 +46,7 @@ Use advanced protection against ransomware | c1db55ab-c21a-4637-bb3f-a12568109d3 Block credential stealing from the Windows local security authority subsystem (lsass.exe) | 9e6c4e1f-7d60-472f-ba1a-a39ef669e4b2 Block process creations originating from PSExec and WMI commands | d1e49aac-8f56-4280-b9ba-993a6d77406c Block untrusted and unsigned processes that run from USB | b2b3f03d-6a65-4f7b-a9c7-1c7ef74a9ba4 -Block only Office communication applications from creating child processes | 26190899-1602-49e8-8b27-eb1d0a1ce869 +Block Office communication applications from creating child processes | 26190899-1602-49e8-8b27-eb1d0a1ce869 Block Adobe Reader from creating child processes | 7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c See the [Attack surface reduction](attack-surface-reduction-exploit-guard.md) topic for details on each rule. From ade3a129d71e8c42417b0174e3f3c0b5a819747f Mon Sep 17 00:00:00 2001 From: "Andrea Bichsel (Aquent LLC)" Date: Wed, 17 Oct 2018 19:38:24 +0000 Subject: [PATCH 3/4] Corrected ASR rules. --- .../attack-surface-reduction-exploit-guard.md | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/windows/security/threat-protection/windows-defender-exploit-guard/attack-surface-reduction-exploit-guard.md b/windows/security/threat-protection/windows-defender-exploit-guard/attack-surface-reduction-exploit-guard.md index b4994b67e5..c66852c277 100644 --- a/windows/security/threat-protection/windows-defender-exploit-guard/attack-surface-reduction-exploit-guard.md +++ b/windows/security/threat-protection/windows-defender-exploit-guard/attack-surface-reduction-exploit-guard.md @@ -56,7 +56,7 @@ Use advanced protection against ransomware | c1db55ab-c21a-4637-bb3f-a12568109d3 Block credential stealing from the Windows local security authority subsystem (lsass.exe) | 9e6c4e1f-7d60-472f-ba1a-a39ef669e4b2 Block process creations originating from PSExec and WMI commands | d1e49aac-8f56-4280-b9ba-993a6d77406c Block untrusted and unsigned processes that run from USB | b2b3f03d-6a65-4f7b-a9c7-1c7ef74a9ba4 -Block only Office communication applications from creating child processes | 26190899-1602-49e8-8b27-eb1d0a1ce869 +Block Office communication applications from creating child processes | 26190899-1602-49e8-8b27-eb1d0a1ce869 Block Adobe Reader from creating child processes | 7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c The rules apply to the following Office apps: @@ -120,8 +120,6 @@ Malware and other threats can attempt to obfuscate or hide their malicious code This rule prevents scripts that appear to be obfuscated from running. -It uses the [AntiMalwareScanInterface (AMSI)](https://msdn.microsoft.com/en-us/library/windows/desktop/dn889587(v=vs.85).aspx) to determine if a script is potentially obfuscated, and then blocks such a script, or blocks scripts when an attempt is made to access them. - ### Rule: Block Win32 API calls from Office macro Malware can use macro code in Office files to import and load Win32 DLLs, which can then be used to make API calls to allow further infection throughout the system. From 03f1e9f35005066ada6cda6bcab550ad254d5f8f Mon Sep 17 00:00:00 2001 From: "Andrea Bichsel (Aquent LLC)" Date: Wed, 17 Oct 2018 20:10:41 +0000 Subject: [PATCH 4/4] Corrected ASR rule. --- .../customize-attack-surface-reduction.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/windows/security/threat-protection/windows-defender-exploit-guard/customize-attack-surface-reduction.md b/windows/security/threat-protection/windows-defender-exploit-guard/customize-attack-surface-reduction.md index 2ed1ca2fa0..75725299ff 100644 --- a/windows/security/threat-protection/windows-defender-exploit-guard/customize-attack-surface-reduction.md +++ b/windows/security/threat-protection/windows-defender-exploit-guard/customize-attack-surface-reduction.md @@ -11,7 +11,7 @@ ms.pagetype: security ms.localizationpriority: medium author: andreabichsel ms.author: v-anbic -ms.date: 10/02/2018 +ms.date: 10/17/2018 --- # Customize attack surface reduction rules @@ -61,7 +61,7 @@ Use advanced protection against ransomware | [!include[Check mark yes](images/sv Block credential stealing from the Windows local security authority subsystem (lsass.exe) | [!include[Check mark no](images/svg/check-no.svg)] | 9e6c4e1f-7d60-472f-ba1a-a39ef669e4b2 Block process creations originating from PSExec and WMI commands | [!include[Check mark yes](images/svg/check-yes.svg)] | d1e49aac-8f56-4280-b9ba-993a6d77406c Block untrusted and unsigned processes that run from USB | [!include[Check mark yes](images/svg/check-yes.svg)] | b2b3f03d-6a65-4f7b-a9c7-1c7ef74a9ba4 -Block only Office communication applications from creating child processes | [!include[Check mark yes](images/svg/check-yes.svg)] | 26190899-1602-49e8-8b27-eb1d0a1ce869 +Block Office communication applications from creating child processes | [!include[Check mark yes](images/svg/check-yes.svg)] | 26190899-1602-49e8-8b27-eb1d0a1ce869 Block Adobe Reader from creating child processes | [!include[Check mark yes](images/svg/check-yes.svg)] | 7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c See the [attack surface reduction](attack-surface-reduction-exploit-guard.md) topic for details on each rule.