Query: detect Detects suspicious call to the "ShellExec_RunDLL" exported function of SHELL32.DLL through the ordinal number to launch in logs
Matching passage: Sigma rule: Detects suspicious call to the "ShellExec_RunDLL" exported function of SHELL32.DLL through the ordinal number to launch. Logsource: windows / process_creation. Rule: title: Suspicious ShellExec_RunDLL Call Via Ordinal id: 8823e85d-31d8-473e-b7f4-92da070f0fc6 related: - id: d87bd452-6da1-456e-8155-7dc988157b7d type: derived status: test description: 'Detects suspicious call to the "ShellExec_RunDLL" exported function of SHELL32.DLL through the ordinal number to launch other commands. Adversary might only use the ordinal number in order to bypass existing detection that alert on usage of ShellExec_RunDLL on CommandLine. ' references: - https://redcanary.com/blog/raspberry-robin/ - https://www.microsoft.com/en-us/security/blog/2022/10/27/raspberry-robin-worm-part-of-larger-ecosystem-facilitating-pre-ransomware-activity/ - https://github.com/SigmaHQ/sigma/issues/1009 - https://strontic.github.io/xcyclopedia/library/shell32.dll-65DA072F25DE83D9F83653E3FEA3644D.html author: Swachchhanda Shrawan Poudel date: 2024-12-01 tags: - attack.stealth - attack.t1218.011 logsource: category: process_creation product: windows detection: selection_parent_img: ParentCommandLine|contains: SHELL32.DLL selection_parent_ordinal: ParentCommandLine|contains: - '#568' - '#570' - '#572' - '#576' selection_susp_cli_parent: - ParentCommandLine|contains: - comspec - iex - Invoke- - msiexec - odbcconf - regsvr32 - ParentCommandLine|contains: - \Desktop\ - \ProgramData\ - \Temp\ - \Users\Public\ selection_susp_child_img: Image|endswith: - \bash.exe - \bitsadmin.exe - \cmd.exe - \cscript.exe - \curl.exe - \mshta.exe - \msiexec.exe - \msxsl.exe - \odbcconf.exe - \powershell.exe - \pwsh.exe - \regsvr32.exe - \schtasks.exe - \wmic.exe - \wscript.exe condition: all of selection_parent_* and 1 of selection_susp_* falsepositives: - Unknown level: high
Near-miss 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