Talos Rules 2026-06-02
This release adds and modifies rules in several categories.

Talos has added and modified multiple rules in the malware-cnc, os-windows, policy-other and server-webapp rule sets to provide coverage for emerging threats from these technologies.

For information about Snort Subscriber Rulesets available for purchase, please visit the Snort product page.

Change logs

29200

2026-06-02 14:02:24 UTC

Snort Subscriber Rules Update

Date: 2026-06-02

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 2092000.

The format of the file is:

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

New Rules:


 * 1:66528 <-> DISABLED <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt (os-windows.rules)
 * 1:66529 <-> DISABLED <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt (os-windows.rules)
 * 1:66532 <-> DISABLED <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt (server-webapp.rules)
 * 1:66533 <-> ENABLED <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication (malware-cnc.rules)
 * 1:66534 <-> ENABLED <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication (malware-cnc.rules)
 * 1:66535 <-> ENABLED <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication (malware-cnc.rules)
 * 1:66536 <-> ENABLED <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication (malware-cnc.rules)
 * 1:66537 <-> ENABLED <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication (malware-cnc.rules)
 * 1:66538 <-> DISABLED <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt (server-other.rules)
 * 3:66531 <-> ENABLED <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt (policy-other.rules)
 * 3:66530 <-> ENABLED <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt (policy-other.rules)

Modified Rules:


 * 1:65992 <-> DISABLED <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt (server-other.rules)
 * 1:65991 <-> DISABLED <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt (server-other.rules)

29181

2026-06-02 14:02:24 UTC

Snort Subscriber Rules Update

Date: 2026-06-02

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 2091801.

The format of the file is:

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

New Rules:


 * 1:66536 <-> ENABLED <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication (malware-cnc.rules)
 * 1:66538 <-> DISABLED <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt (server-other.rules)
 * 1:66535 <-> ENABLED <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication (malware-cnc.rules)
 * 1:66537 <-> ENABLED <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication (malware-cnc.rules)
 * 1:66529 <-> DISABLED <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt (os-windows.rules)
 * 1:66532 <-> DISABLED <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt (server-webapp.rules)
 * 1:66533 <-> ENABLED <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication (malware-cnc.rules)
 * 1:66528 <-> DISABLED <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt (os-windows.rules)
 * 1:66534 <-> ENABLED <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication (malware-cnc.rules)
 * 3:66530 <-> ENABLED <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt (policy-other.rules)
 * 3:66531 <-> ENABLED <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt (policy-other.rules)

Modified Rules:


 * 1:65991 <-> DISABLED <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt (server-other.rules)
 * 1:65992 <-> DISABLED <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt (server-other.rules)

29171

2026-06-02 14:02:24 UTC

Snort Subscriber Rules Update

Date: 2026-06-02

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 2091701.

The format of the file is:

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

New Rules:


 * 1:66528 <-> DISABLED <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt (os-windows.rules)
 * 1:66533 <-> ENABLED <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication (malware-cnc.rules)
 * 1:66534 <-> ENABLED <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication (malware-cnc.rules)
 * 1:66529 <-> DISABLED <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt (os-windows.rules)
 * 1:66538 <-> DISABLED <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt (server-other.rules)
 * 1:66536 <-> ENABLED <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication (malware-cnc.rules)
 * 1:66535 <-> ENABLED <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication (malware-cnc.rules)
 * 1:66532 <-> DISABLED <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt (server-webapp.rules)
 * 1:66537 <-> ENABLED <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication (malware-cnc.rules)
 * 3:66530 <-> ENABLED <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt (policy-other.rules)
 * 3:66531 <-> ENABLED <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt (policy-other.rules)

Modified Rules:


 * 1:65992 <-> DISABLED <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt (server-other.rules)
 * 1:65991 <-> DISABLED <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt (server-other.rules)

3200

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.2.0.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

3351

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.3.5.1.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

3360

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.3.6.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

3370

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.3.7.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

3700

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.7.0.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

3900

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.9.0.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

31110

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.11.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

31150

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.15.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

31180

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.18.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

31200

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.12.0.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

31210

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.21.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

31350

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.35.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

31440

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.44.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

31470

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.1.47.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

31100

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.11.0.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt

31200

2026-06-02 14:06:22 UTC

Snort Subscriber Rules Update

Date: 2026-06-01-002

This is the complete list of rules modified and added in the Cisco Talos Certified rule pack for Snort version 3.12.0.0.

The format of the file is:

gid:sid <-> Message

New Rules:

* 1:301513 <-> OS-WINDOWS Microsoft Defender denial of service malicious file download attempt
* 1:66532 <-> SERVER-WEBAPP Apache ActiveMQ ExceptionResponse remote code execution attempt
* 1:66538 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 3:66530 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 3:66531 <-> POLICY-OTHER TRUFFLEHUNTER TALOS-2026-2418 attack attempt
* 7:14 <-> MALWARE-CNC Win.Infostealer.SnakeKeylogger variant communication
* 7:15 <-> MALWARE-CNC Win.Infostealer.Antarctida variant communication
* 7:16 <-> MALWARE-CNC Win.Trojan.Agent variant communication
* 7:17 <-> MALWARE-CNC Win.Infostealer.AsyncRAT variant communication
* 7:18 <-> MALWARE-CNC Win.Infostealer.KuroMi variant communication
* 7:19 <-> MALWARE-CNC Win.Trojan.Agent variant outbound communication

Modified Rules:

* 1:65991 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt
* 1:65992 <-> SERVER-OTHER Broadcom VMware vCenter DCERPC integer underflow attempt