Talos Rules 2020-03-23
This release adds and modifies rules in several categories.

Two remote code execution vulnerabilities exist in Microsoft Windows when the Windows Adobe Type Manager Library improperly handles a specially-crafted multi-master font - Adobe Type 1 PostScript format.

Rules to detect attacks targeting these vulnerabilities are included in this release and are identified with GID 1, SIDs 53489 through 53492.

Talos also has added and modified multiple rules in the file-office, file-other, file-pdf, malware-cnc and protocol-scada rule sets to provide coverage for emerging threats from these technologies.

Change logs

2020-03-23 23:40:51 UTC

Snort Subscriber Rules Update

Date: 2020-03-23

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:


 * 1:53492 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (file-other.rules)
 * 1:53491 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (file-other.rules)
 * 1:53490 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (file-other.rules)
 * 1:53489 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (file-other.rules)
 * 3:53484 <-> ENABLED <-> PROTOCOL-SCADA TRUFFLEHUNTER TALOS-2020-1025 attack attempt (protocol-scada.rules)
 * 3:53486 <-> ENABLED <-> FILE-PDF TRUFFLEHUNTER TALOS-2020-1028 attack attempt (file-pdf.rules)
 * 3:53485 <-> ENABLED <-> FILE-PDF TRUFFLEHUNTER TALOS-2020-1028 attack attempt (file-pdf.rules)
 * 3:53488 <-> ENABLED <-> FILE-OFFICE TRUFFLEHUNTER TALOS-2020-1027 attack attempt (file-office.rules)
 * 3:53487 <-> ENABLED <-> FILE-OFFICE TRUFFLEHUNTER TALOS-2020-1027 attack attempt (file-office.rules)

Modified Rules:


 * 1:37732 <-> ENABLED <-> POLICY-OTHER eicar test string download attempt (policy-other.rules)
 * 1:45909 <-> ENABLED <-> MALWARE-CNC CobaltStrike trial version inbound beacon response (malware-cnc.rules)
 * 3:53445 <-> ENABLED <-> PROTOCOL-SCADA TRUFFLEHUNTER TALOS-2020-1024 attack attempt (protocol-scada.rules)

2020-03-23 23:40:51 UTC

Snort Subscriber Rules Update

Date: 2020-03-23

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:


 * 1:53490 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (file-other.rules)
 * 1:53489 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (file-other.rules)
 * 1:53491 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (file-other.rules)
 * 1:53492 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (file-other.rules)
 * 3:53486 <-> ENABLED <-> FILE-PDF TRUFFLEHUNTER TALOS-2020-1028 attack attempt (file-pdf.rules)
 * 3:53484 <-> ENABLED <-> PROTOCOL-SCADA TRUFFLEHUNTER TALOS-2020-1025 attack attempt (protocol-scada.rules)
 * 3:53488 <-> ENABLED <-> FILE-OFFICE TRUFFLEHUNTER TALOS-2020-1027 attack attempt (file-office.rules)
 * 3:53487 <-> ENABLED <-> FILE-OFFICE TRUFFLEHUNTER TALOS-2020-1027 attack attempt (file-office.rules)
 * 3:53485 <-> ENABLED <-> FILE-PDF TRUFFLEHUNTER TALOS-2020-1028 attack attempt (file-pdf.rules)

Modified Rules:


 * 1:37732 <-> ENABLED <-> POLICY-OTHER eicar test string download attempt (policy-other.rules)
 * 1:45909 <-> ENABLED <-> MALWARE-CNC CobaltStrike trial version inbound beacon response (malware-cnc.rules)
 * 3:53445 <-> ENABLED <-> PROTOCOL-SCADA TRUFFLEHUNTER TALOS-2020-1024 attack attempt (protocol-scada.rules)

2020-03-23 23:40:51 UTC

Snort Subscriber Rules Update

Date: 2020-03-23

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:


 * 1:53492 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (file-other.rules)
 * 1:53491 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (file-other.rules)
 * 1:53490 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (file-other.rules)
 * 1:53489 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (file-other.rules)
 * 3:53484 <-> ENABLED <-> PROTOCOL-SCADA TRUFFLEHUNTER TALOS-2020-1025 attack attempt (protocol-scada.rules)
 * 3:53486 <-> ENABLED <-> FILE-PDF TRUFFLEHUNTER TALOS-2020-1028 attack attempt (file-pdf.rules)
 * 3:53488 <-> ENABLED <-> FILE-OFFICE TRUFFLEHUNTER TALOS-2020-1027 attack attempt (file-office.rules)
 * 3:53485 <-> ENABLED <-> FILE-PDF TRUFFLEHUNTER TALOS-2020-1028 attack attempt (file-pdf.rules)
 * 3:53487 <-> ENABLED <-> FILE-OFFICE TRUFFLEHUNTER TALOS-2020-1027 attack attempt (file-office.rules)

Modified Rules:


 * 1:37732 <-> ENABLED <-> POLICY-OTHER eicar test string download attempt (policy-other.rules)
 * 1:45909 <-> ENABLED <-> MALWARE-CNC CobaltStrike trial version inbound beacon response (malware-cnc.rules)
 * 3:53445 <-> ENABLED <-> PROTOCOL-SCADA TRUFFLEHUNTER TALOS-2020-1024 attack attempt (protocol-scada.rules)

2020-03-23 23:40:51 UTC

Snort Subscriber Rules Update

Date: 2020-03-23

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:


 * 1:53491 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (file-other.rules)
 * 1:53492 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (file-other.rules)
 * 1:53489 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (file-other.rules)
 * 1:53490 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (file-other.rules)
 * 3:53486 <-> ENABLED <-> FILE-PDF TRUFFLEHUNTER TALOS-2020-1028 attack attempt (file-pdf.rules)
 * 3:53484 <-> ENABLED <-> PROTOCOL-SCADA TRUFFLEHUNTER TALOS-2020-1025 attack attempt (protocol-scada.rules)
 * 3:53487 <-> ENABLED <-> FILE-OFFICE TRUFFLEHUNTER TALOS-2020-1027 attack attempt (file-office.rules)
 * 3:53488 <-> ENABLED <-> FILE-OFFICE TRUFFLEHUNTER TALOS-2020-1027 attack attempt (file-office.rules)
 * 3:53485 <-> ENABLED <-> FILE-PDF TRUFFLEHUNTER TALOS-2020-1028 attack attempt (file-pdf.rules)

Modified Rules:


 * 1:37732 <-> ENABLED <-> POLICY-OTHER eicar test string download attempt (policy-other.rules)
 * 1:45909 <-> ENABLED <-> MALWARE-CNC CobaltStrike trial version inbound beacon response (malware-cnc.rules)
 * 3:53445 <-> ENABLED <-> PROTOCOL-SCADA TRUFFLEHUNTER TALOS-2020-1024 attack attempt (protocol-scada.rules)

2020-03-23 23:40:51 UTC

Snort Subscriber Rules Update

Date: 2020-03-23

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:


 * 1:53490 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (file-other.rules)
 * 1:53489 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (file-other.rules)
 * 1:53491 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (file-other.rules)
 * 1:53492 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (file-other.rules)
 * 3:53485 <-> ENABLED <-> FILE-PDF TRUFFLEHUNTER TALOS-2020-1028 attack attempt (file-pdf.rules)
 * 3:53486 <-> ENABLED <-> FILE-PDF TRUFFLEHUNTER TALOS-2020-1028 attack attempt (file-pdf.rules)
 * 3:53488 <-> ENABLED <-> FILE-OFFICE TRUFFLEHUNTER TALOS-2020-1027 attack attempt (file-office.rules)
 * 3:53487 <-> ENABLED <-> FILE-OFFICE TRUFFLEHUNTER TALOS-2020-1027 attack attempt (file-office.rules)
 * 3:53484 <-> ENABLED <-> PROTOCOL-SCADA TRUFFLEHUNTER TALOS-2020-1025 attack attempt (protocol-scada.rules)

Modified Rules:


 * 1:45909 <-> ENABLED <-> MALWARE-CNC CobaltStrike trial version inbound beacon response (malware-cnc.rules)
 * 1:37732 <-> ENABLED <-> POLICY-OTHER eicar test string download attempt (policy-other.rules)
 * 3:53445 <-> ENABLED <-> PROTOCOL-SCADA TRUFFLEHUNTER TALOS-2020-1024 attack attempt (protocol-scada.rules)

2020-03-23 23:40:51 UTC

Snort Subscriber Rules Update

Date: 2020-03-23

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:


 * 1:53490 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (snort3-file-other.rules)
 * 1:53492 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (snort3-file-other.rules)
 * 1:53489 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (snort3-file-other.rules)
 * 1:53491 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (snort3-file-other.rules)

Modified Rules:


 * 1:37732 <-> ENABLED <-> POLICY-OTHER eicar test string download attempt (snort3-policy-other.rules)
 * 1:45909 <-> ENABLED <-> MALWARE-CNC CobaltStrike trial version inbound beacon response (snort3-malware-cnc.rules)

2020-03-23 23:40:51 UTC

Snort Subscriber Rules Update

Date: 2020-03-23

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:


 * 1:53492 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (file-other.rules)
 * 1:53490 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (file-other.rules)
 * 1:53491 <-> ENABLED <-> FILE-OTHER Microsoft Windows Type 1 font stack overflow attempt (file-other.rules)
 * 1:53489 <-> ENABLED <-> FILE-OTHER Microsoft Windows fontdrvhost SetBlendDesignPositions out of bounds write attempt (file-other.rules)
 * 3:53485 <-> ENABLED <-> FILE-PDF TRUFFLEHUNTER TALOS-2020-1028 attack attempt (file-pdf.rules)
 * 3:53488 <-> ENABLED <-> FILE-OFFICE TRUFFLEHUNTER TALOS-2020-1027 attack attempt (file-office.rules)
 * 3:53487 <-> ENABLED <-> FILE-OFFICE TRUFFLEHUNTER TALOS-2020-1027 attack attempt (file-office.rules)
 * 3:53484 <-> ENABLED <-> PROTOCOL-SCADA TRUFFLEHUNTER TALOS-2020-1025 attack attempt (protocol-scada.rules)
 * 3:53486 <-> ENABLED <-> FILE-PDF TRUFFLEHUNTER TALOS-2020-1028 attack attempt (file-pdf.rules)

Modified Rules:


 * 1:37732 <-> ENABLED <-> POLICY-OTHER eicar test string download attempt (policy-other.rules)
 * 1:45909 <-> ENABLED <-> MALWARE-CNC CobaltStrike trial version inbound beacon response (malware-cnc.rules)
 * 3:53445 <-> ENABLED <-> PROTOCOL-SCADA TRUFFLEHUNTER TALOS-2020-1024 attack attempt (protocol-scada.rules)