Talos Rules 2020-03-11
Talos is aware of vulnerabilities affecting products from Microsoft Corporation.

Microsoft Vulnerability CVE-2020-0796: A coding deficiency exists in Microsoft Server Message Block 3.0 protocol that may lead to remote code execution.

Rules to detect attacks targeting these vulnerabilities are included in this release and are identified with GID 1, SIDs 53425 through 53428.

Talos has added and modified multiple rules in the os-windows rule sets to provide coverage for emerging threats from these technologies.

Change logs

2020-03-12 15:57:16 UTC

Snort Subscriber Rules Update

Date: 2020-03-11

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 2983.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:53427 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53428 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53425 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53426 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)

Modified Rules:


 * 1:13360 <-> DISABLED <-> APP-DETECT FTP 530 Login failed response (app-detect.rules)

2020-03-12 15:57:16 UTC

Snort Subscriber Rules Update

Date: 2020-03-11

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 3000.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:53428 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (snort3-os-windows.rules)
 * 1:53427 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (snort3-os-windows.rules)
 * 1:53426 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (snort3-os-windows.rules)
 * 1:53425 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (snort3-os-windows.rules)

Modified Rules:


 * 1:13360 <-> DISABLED <-> APP-DETECT FTP 530 Login failed response (snort3-app-detect.rules)

2020-03-12 15:57:16 UTC

Snort Subscriber Rules Update

Date: 2020-03-11

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 2091101.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:53427 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53428 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53426 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53425 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)

Modified Rules:


 * 1:13360 <-> DISABLED <-> APP-DETECT FTP 530 Login failed response (app-detect.rules)

2020-03-12 15:57:16 UTC

Snort Subscriber Rules Update

Date: 2020-03-11

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 2091300.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:53427 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53426 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53428 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53425 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)

Modified Rules:


 * 1:13360 <-> DISABLED <-> APP-DETECT FTP 530 Login failed response (app-detect.rules)

2020-03-12 15:57:16 UTC

Snort Subscriber Rules Update

Date: 2020-03-11

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 2091401.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:53426 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53425 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53427 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53428 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)

Modified Rules:


 * 1:13360 <-> DISABLED <-> APP-DETECT FTP 530 Login failed response (app-detect.rules)

2020-03-12 15:57:16 UTC

Snort Subscriber Rules Update

Date: 2020-03-11

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 2091500.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:53425 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53426 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53428 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53427 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)

Modified Rules:


 * 1:13360 <-> DISABLED <-> APP-DETECT FTP 530 Login failed response (app-detect.rules)

2020-03-12 15:57:16 UTC

Snort Subscriber Rules Update

Date: 2020-03-11

This is the complete list of rules modified and added in the Sourcefire VRT Certified rule pack for Snort version 2091501.

The format of the file is:

gid:sid <-> Default rule state <-> Message (rule group)

New Rules:


 * 1:53428 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53427 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53426 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)
 * 1:53425 <-> ENABLED <-> OS-WINDOWS Microsoft Windows SMB srv2.sys remote code execution attempt (os-windows.rules)

Modified Rules:


 * 1:13360 <-> DISABLED <-> APP-DETECT FTP 530 Login failed response (app-detect.rules)