Query: detect Detects specific commands commonly used to remove or empty the syslog. Which is a technique often used by attacker as a in logs
Matching passage: Sigma rule: Detects specific commands commonly used to remove or empty the syslog. Which is a technique often used by attacker as a. Logsource: linux / process_creation. Rule: title: Syslog Clearing or Removal Via System Utilities id: 3fcc9b35-39e4-44c0-a2ad-9e82b6902b31 status: test description: 'Detects specific commands commonly used to remove or empty the syslog. Which is a technique often used by attacker as a method to hide their tracks ' references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1070.002/T1070.002.md - https://www.virustotal.com/gui/file/54d60fd58d7fa3475fa123985bfc1594df26da25c1f5fbc7dfdba15876dd8ac5/behavior author: Max Altgelt (Nextron Systems), Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research), MSTIC date: 2021-10-15 modified: 2025-10-15 tags: - attack.defense-impairment - attack.t1685.006 logsource: product: linux category: process_creation detection: selection_file: CommandLine|contains: /var/log/syslog selection_command_rm: Image|endswith: /rm CommandLine|contains: - ' -r ' - ' -f ' - ' -rf ' - /var/log/syslog selection_command_unlink: Image|endswith: /unlink selection_command_mv: Image|endswith: /mv selection_command_truncate: Image|endswith: /truncate CommandLine|contains|all: - '0 ' - /var/log/syslog CommandLine|contains: - '-s ' - '-c ' - --size selection_command_ln: Image|endswith: /ln CommandLine|contains|all: - '/dev/null ' - /var/log/syslog CommandLine|contains: - '-sf ' - '-sfn ' - '-sfT ' selection_command_cp: Image|endswith: /cp CommandLine|contains: /dev/null selection_command_shred: Image|endswith: /shred CommandLine|contains: '-u ' selection_unique_other: CommandLine|contains: - ' > /var/log/syslog' - ' >/var/log/syslog' - ' >| /var/log/syslog' - ': > /var/log/syslog' - :> /var/log/syslog - :>/var/log/syslog - '>|/var/log/syslog' selection_unique_journalctl: CommandLine|contains: - journalctl --vacuum - journalctl --rotate condition: (selection_file and 1 of selection_command_*) or 1 of selection_unique_* falsepositives: - Log rotation. - Maintenance. level: high
Near-miss passage: Sigma rule: Adversaries may disable or modify system firewalls in order to bypass controls limiting network usage. Logsource: windows / registry_set. Rule: title: Disable Microsoft Defender Firewall via Registry id: 974515da-6cc5-4c95-ae65-f97f9150ec7f status: test description: Adversaries may disable or modify system firewalls in order to bypass controls limiting network usage references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1562.004/T1562.004.md#atomic-test-2---disable-microsoft-defender-firewall-via-registry author: frack113 date: 2022-01-09 modified: 2024-03-25 tags: - attack.defense-impairment - attack.t1686.003 logsource: category: registry_set product: windows detection: selection: TargetObject|contains: \Services\SharedAccess\Parameters\FirewallPolicy\ TargetObject|endswith: \EnableFirewall Details: DWORD (0x00000000) condition: selection falsepositives: - Unknown level: medium regression_tests_path: regression_data/rules/windows/registry/registry_set/registry_set_disable_defender_firewall/info.yml simulation: - type: atomic-red-team name: Disable Microsoft Defender Firewall via Registry technique: T1562.004 atomic_guid: afedc8c4-038c-4d82-b3e5-623a95f8a612