Query: Sigma rule for Detects suspicious activities as declared by Florian Roth in its 'Best Practice Auditd Configuration'. This includes the
Matching passage: Sigma rule: Detects suspicious activities as declared by Florian Roth in its 'Best Practice Auditd Configuration'. This includes the. Logsource: linux / auditd. Rule: title: Suspicious C2 Activities id: f7158a64-6204-4d6d-868a-6e6378b467e0 status: test description: 'Detects suspicious activities as declared by Florian Roth in its ''Best Practice Auditd Configuration''. This includes the detection of the following commands; wget, curl, base64, nc, netcat, ncat, ssh, socat, wireshark, rawshark, rdesktop, nmap. These commands match a few techniques from the tactics "Command and Control", including not exhaustively the following; Application Layer Protocol (T1071), Non-Application Layer Protocol (T1095), Data Encoding (T1132) ' references: - https://github.com/Neo23x0/auditd author: Marie Euler date: 2020-05-18 modified: 2021-11-27 tags: - attack.command-and-control logsource: product: linux service: auditd definition: 'Required auditd configuration: -w /usr/bin/wget -p x -k susp_activity -w /usr/bin/curl -p x -k susp_activity -w /usr/bin/base64 -p x -k susp_activity -w /bin/nc -p x -k susp_activity -w /bin/netcat -p x -k susp_activity -w /usr/bin/ncat -p x -k susp_activity -w /usr/bin/ss -p x -k susp_activity -w /usr/bin/netstat -p x -k susp_activity -w /usr/bin/ssh -p x -k susp_activity -w /usr/bin/scp -p x -k susp_activity -w /usr/bin/sftp -p x -k susp_activity -w /usr/bin/ftp -p x -k susp_activity -w /usr/bin/socat -p x -k susp_activity -w /usr/bin/wireshark -p x -k susp_activity -w /usr/bin/tshark -p x -k susp_activity -w /usr/bin/rawshark -p x -k susp_activity -w /usr/bin/rdesktop -p x -k susp_activity -w /usr/local/bin/rdesktop -p x -k susp_activity -w /usr/bin/wlfreerdp -p x -k susp_activity -w /usr/bin/xfreerdp -p x -k susp_activity -w /usr/local/bin/xfreerdp -p x -k susp_activity -w /usr/bin/nmap -p x -k susp_activity (via https://github.com/Neo23x0/auditd/blob/ddf2603dbc985f97538d102f13b4e4446b402bae/audit.rules#L336) ' detection: selection: key: susp_activity condition: selection falsepositives: - Admin or User activity level: medium
Near-miss passage: Sigma rule: Detects modification of LSA PPL protection settings via CommandLine. It may indicate an attempt to disable protection an. Logsource: windows / process_creation. Rule: title: LSA PPL Protection Setting Modification via CommandLine id: 8c0eca51-0f88-4db2-9183-fdfb10c703f9 status: test description: 'Detects modification of LSA PPL protection settings via CommandLine. It may indicate an attempt to disable protection and enable credential dumping tools to access LSASS process memory. ' references: - https://thedfirreport.com/2022/03/21/apt35-automates-initial-access-using-proxyshell/ - https://github.com/shoober420/windows11-scripts/blob/38d83331738cd713ccb42f2c4557d17a27aefd98/Windows11Tweaks.bat#L1825 author: Florian Roth (Nextron Systems), Swachchhanda Shrawan Poudel (Nextron Systems) date: 2022-03-22 modified: 2026-03-13 tags: - attack.defense-impairment - attack.t1689 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: - \reg.exe - \powershell.exe - \pwsh.exe - OriginalFileName: - reg.exe - powershell.exe - pwsh.dll selection_cli_action: CommandLine|contains|all: - ControlSet - \Control\Lsa CommandLine|contains: - Set-ItemProperty - New-ItemProperty - ' add ' selection_key: CommandLine|contains: - IsPplAutoEnabled - RunAsPPL - RunAsPPLBoot condition: all of selection_* falsepositives: - Unlikely level: medium