Query: detection rule: Detects an office application (Word, Excel, PowerPoint) that initiate a network connection to a non-private IP addresse
Matching passage: Sigma rule: Detects an office application (Word, Excel, PowerPoint) that initiate a network connection to a non-private IP addresse. Logsource: windows / network_connection. Rule: title: Office Application Initiated Network Connection To Non-Local IP id: 75e33ce3-ae32-4dcc-9aa8-a2a3029d6f84 status: test description: 'Detects an office application (Word, Excel, PowerPoint) that initiate a network connection to a non-private IP addresses. This rule aims to detect traffic similar to one seen exploited in CVE-2021-42292. This rule will require an initial baseline and tuning that is specific to your organization. ' references: - https://corelight.com/blog/detecting-cve-2021-42292 - https://learn.microsoft.com/de-de/microsoft-365/enterprise/urls-and-ip-address-ranges?view=o365-worldwide author: Christopher Peacock '@securepeacock', SCYTHE '@scythe_io', Florian Roth (Nextron Systems), Tim Shelton, Nasreddine Bencherchali (Nextron Systems) date: 2021-11-10 modified: 2025-10-17 tags: - attack.execution - attack.t1203 logsource: category: network_connection product: windows detection: selection: Image|endswith: - \excel.exe - \outlook.exe - \powerpnt.exe - \winword.exe - \wordview.exe Initiated: 'true' filter_main_local_ranges: DestinationIp|cidr: - 127.0.0.0/8 - 10.0.0.0/8 - 172.16.0.0/12 - 192.168.0.0/16 - 169.254.0.0/16 - ::1/128 - fe80::/10 - fc00::/7 filter_main_msrange_generic: DestinationIp|cidr: - 2.16.56.0/23 - 2.17.248.0/21 - 13.107.240.0/21 - 20.184.0.0/13 - 23.61.224.0/20 - 20.192.0.0/10 - 23.72.0.0/13 - 23.3.88.0/22 - 23.216.132.0/22 - 40.76.0.0/14 - 51.10.0.0/15 - 51.103.0.0/16 - 51.104.0.0/15 - 51.142.136.0/22 - 52.160.0.0/11 - 95.101.96.0/21 - 204.79.197.0/24 filter_main_msrange_exchange_1: DestinationIp|cidr: - 13.107.4.0/22 - 13.107.6.152/31 - 13.107.18.10/31 - 13.107.42.0/23 - 13.107.128.0/22 - 23.35.224.0/20 - 23.53.40.0/22 - 23.103.160.0/20 - 23.216.76.0/22 - 40.96.0.0/13 - 40.104.0.0/15 - 52.96.0.0/14 - 131.253.33.215/32 - 132.245.0.0/16 - 150.171.32.0/22 - 204.79.197.215/32 - 2603:1006::/40 - 2603:1016::/36 - 2603:1026::/36 - 2603:1036::/36 - 2603:1046::/36 - 2603:1056::/36 - 2620:1ec:4::152/128 - 2620:1ec:4::153/128 - 2620:1ec:c::10/128 - 2620:1ec:c::11/128 - 2620:1ec:d::10/128 - 2620:1ec:d::11/128 - 2620:1ec:8f0::/46 - 2620:1ec:900::/46 - 2620:1ec:a92::152/128 - 2620:1ec:a92::153/128 DestinationPort: - 80 - 443 filter_main_msrange_exchange_2: DestinationIp|cidr: - 13.107.6.152/31 - 13.107.18.10/31 - 13.107.128.0/22 - 23.103.160.0/20 - 40.96.0.0/13 - 40.104.0.0/15 - 52.96.0.0/14 - 131.253.33.215/32 - 132.245.0.0/16 - 150.171.32.0/22 - 204.79.197.215/32 - 2603:1006::/40 - 2603:1016::/36 - 2603:1026::/36 - 2603:1036::/36
Near-miss passage: Sigma rule: Detects password policy discovery commands. Logsource: linux / auditd. Rule: title: Password Policy Discovery - Linux id: ca94a6db-8106-4737-9ed2-3e3bb826af0a status: stable description: Detects password policy discovery commands references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1201/T1201.md - https://linux.die.net/man/1/chage - https://man7.org/linux/man-pages/man1/passwd.1.html - https://superuser.com/questions/150675/how-to-display-password-policy-information-for-a-user-ubuntu author: Ömer Günal, oscd.community, Pawel Mazur date: 2020-10-08 modified: 2024-12-01 tags: - attack.discovery - attack.t1201 logsource: product: linux service: auditd detection: selection_files: type: PATH name: - /etc/login.defs - /etc/pam.d/auth - /etc/pam.d/common-account - /etc/pam.d/common-auth - /etc/pam.d/common-password - /etc/pam.d/system-auth - /etc/security/pwquality.conf selection_chage: type: EXECVE a0: chage a1: - --list - -l selection_passwd: type: EXECVE a0: passwd a1: - -S - --status condition: 1 of selection_* falsepositives: - Legitimate administration activities level: low