From 6ecdbed8d36bb2bac4caa876276c64c2090c3743 Mon Sep 17 00:00:00 2001 From: "github-actions[bot]" <41898282+github-actions[bot]@users.noreply.github.com> Date: Fri, 13 Feb 2026 20:30:13 +0000 Subject: [PATCH] Sigma Rule Update (2026-02-13 20:30:04) (#252) Co-authored-by: YamatoSecurity --- config/security_rules.json | 307 ++++++++++++++++++++----------------- 1 file changed, 166 insertions(+), 141 deletions(-) diff --git a/config/security_rules.json b/config/security_rules.json index 3ef252f9..4ea11296 100644 --- a/config/security_rules.json +++ b/config/security_rules.json @@ -294,8 +294,8 @@ "car.2013-09-005", "T1543.003", "T1569.002", - "T1569", - "T1543" + "T1543", + "T1569" ], "title": "Malicious Service Installations" }, @@ -1726,9 +1726,9 @@ "TA0011", "T1071.004", "detection.emerging-threats", - "T1071", + "T1053", "T1543", - "T1053" + "T1071" ], "title": "OilRig APT Registry Persistence" }, @@ -1760,9 +1760,9 @@ "TA0011", "T1071.004", "detection.emerging-threats", + "T1053", "T1543", - "T1071", - "T1053" + "T1071" ], "title": "OilRig APT Activity" }, @@ -1828,8 +1828,8 @@ "T1071.004", "detection.emerging-threats", "T1053", - "T1543", - "T1071" + "T1071", + "T1543" ], "title": "OilRig APT Schedule Task Persistence - Security" }, @@ -2993,8 +2993,8 @@ "T1543.003", "T1569.002", "detection.emerging-threats", - "T1569", - "T1543" + "T1543", + "T1569" ], "title": "CosmicDuke Service Installation" }, @@ -3103,8 +3103,8 @@ "T1566.001", "cve.2017-8759", "detection.emerging-threats", - "T1204", - "T1566" + "T1566", + "T1204" ], "title": "Exploit for CVE-2017-8759" }, @@ -3299,8 +3299,8 @@ "attack.s0412", "attack.g0001", "detection.emerging-threats", - "T1218", - "T1059" + "T1059", + "T1218" ], "title": "ZxShell Malware" }, @@ -3329,8 +3329,8 @@ "T1053.005", "T1027", "detection.emerging-threats", - "T1053", - "T1059" + "T1059", + "T1053" ], "title": "Turla Group Commands May 2020" }, @@ -3417,6 +3417,31 @@ ], "title": "Grixba Malware Reconnaissance Activity" }, + { + "category": "process_creation", + "channel": [ + "sec" + ], + "description": "Detects suspicious child processes spawned by SolarWinds WebHelpDesk (WHD) application, which may indicate exploitation activity leveraging RCE vulnerabilities such as CVE-2025-40551, CVE-2025-40536, or CVE-2025-26399\n", + "event_ids": [ + "4688" + ], + "id": "bd4e9b65-f54b-992d-f8c1-3fcb00c1de68", + "level": "high", + "service": "", + "subcategory_guids": [ + "0CCE922B-69AE-11D9-BED3-505054503030" + ], + "tags": [ + "TA0001", + "T1190", + "cve.2025-26399", + "cve.2025-40536", + "cve.2025-40551", + "detection.emerging-threats" + ], + "title": "Suspicious Child Process of SolarWinds WebHelpDesk" + }, { "category": "process_creation", "channel": [ @@ -4178,8 +4203,8 @@ "T1003.001", "T1560.001", "detection.emerging-threats", - "T1560", - "T1003" + "T1003", + "T1560" ], "title": "APT31 Judgement Panda Activity" }, @@ -4234,9 +4259,9 @@ "T1053.005", "T1059.001", "detection.emerging-threats", - "T1053", "T1059", - "T1036" + "T1036", + "T1053" ], "title": "Operation Wocao Activity - Security" }, @@ -4267,9 +4292,9 @@ "T1053.005", "T1059.001", "detection.emerging-threats", + "T1059", "T1036", - "T1053", - "T1059" + "T1053" ], "title": "Operation Wocao Activity" }, @@ -5948,8 +5973,8 @@ "TA0005", "T1036.005", "detection.emerging-threats", - "T1036", - "T1059" + "T1059", + "T1036" ], "title": "Greenbug Espionage Group Indicators" }, @@ -6831,8 +6856,8 @@ "TA0002", "T1204.002", "T1553.005", - "T1204", - "T1553" + "T1553", + "T1204" ], "title": "Windows AppX Deployment Full Trust Package Installation" }, @@ -7418,8 +7443,8 @@ "T1218.010", "TA0002", "TA0005", - "T1218", - "T1204" + "T1204", + "T1218" ], "title": "New Lolbin Process by Office Applications" }, @@ -7998,8 +8023,8 @@ "T1564.004", "T1552.001", "T1105", - "T1552", - "T1564" + "T1564", + "T1552" ], "title": "Abusing Findstr for Defense Evasion" }, @@ -8601,8 +8626,8 @@ "T1218.010", "TA0002", "TA0005", - "T1218", - "T1204" + "T1204", + "T1218" ], "title": "Excel Proxy Executing Regsvr32 With Payload Alternate" }, @@ -8689,8 +8714,8 @@ "T1218.010", "TA0002", "TA0005", - "T1218", - "T1204" + "T1204", + "T1218" ], "title": "Excel Proxy Executing Regsvr32 With Payload" }, @@ -10642,9 +10667,9 @@ "T1021.002", "T1543.003", "T1569.002", + "T1021", "T1543", - "T1569", - "T1021" + "T1569" ], "title": "CobaltStrike Service Installations - System" }, @@ -10979,8 +11004,8 @@ "TA0002", "T1021.002", "T1569.002", - "T1569", - "T1021" + "T1021", + "T1569" ], "title": "smbexec.py Service Installation" }, @@ -11186,8 +11211,8 @@ "T1553.002", "attack.s0195", "T1070", - "T1553", - "T1027" + "T1027", + "T1553" ], "title": "Potential Secure Deletion with SDelete" }, @@ -11809,8 +11834,8 @@ "T1003.006", "T1569.002", "attack.s0005", - "T1003", - "T1569" + "T1569", + "T1003" ], "title": "Credential Dumping Tools Service Execution - Security" }, @@ -11886,8 +11911,8 @@ "T1543.003", "T1569.002", "T1021", - "T1543", - "T1569" + "T1569", + "T1543" ], "title": "CobaltStrike Service Installations - Security" }, @@ -12451,8 +12476,8 @@ "T1570", "TA0002", "T1569.002", - "T1021", - "T1569" + "T1569", + "T1021" ], "title": "Metasploit Or Impacket Service Installation Via SMB PsExec" }, @@ -14082,8 +14107,8 @@ "TA0002", "T1543.003", "T1569.002", - "T1569", - "T1543" + "T1543", + "T1569" ], "title": "Remote Access Tool Services Have Been Installed - Security" }, @@ -14948,8 +14973,8 @@ "T1059.005", "T1059.006", "T1059.007", - "T1059", - "T1204" + "T1204", + "T1059" ], "title": "AppLocker Prevented Application or Script from Running" }, @@ -15976,8 +16001,8 @@ "T1059.001", "TA0008", "T1021.006", - "T1021", - "T1059" + "T1059", + "T1021" ], "title": "Remote PowerShell Session (PS Classic)" }, @@ -15997,8 +16022,8 @@ "T1059.001", "TA0008", "T1021.003", - "T1059", - "T1021" + "T1021", + "T1059" ], "title": "Suspicious Non PowerShell WSMAN COM Provider" }, @@ -16648,8 +16673,8 @@ "T1059.001", "TA0008", "T1021.006", - "T1059", - "T1021" + "T1021", + "T1059" ], "title": "Remote PowerShell Session (PS Module)" }, @@ -19082,8 +19107,8 @@ "T1059.001", "TA0003", "T1136.001", - "T1136", - "T1059" + "T1059", + "T1136" ], "title": "PowerShell Create Local User" }, @@ -19280,8 +19305,8 @@ "T1529", "attack.g0091", "attack.s0363", - "T1071", - "T1059" + "T1059", + "T1071" ], "title": "Silence.EDA Detection" }, @@ -20654,8 +20679,8 @@ "T1070.001", "T1562.002", "car.2016-04-002", - "T1562", - "T1070" + "T1070", + "T1562" ], "title": "Suspicious Eventlog Clearing or Configuration Change Activity" }, @@ -21127,9 +21152,9 @@ "TA0005", "T1218.005", "T1027.004", - "T1059", + "T1027", "T1218", - "T1027" + "T1059" ], "title": "Csc.EXE Execution Form Potentially Suspicious Parent" }, @@ -22416,8 +22441,8 @@ "TA0008", "T1021.002", "T1218.011", - "T1218", - "T1021" + "T1021", + "T1218" ], "title": "Rundll32 UNC Path Execution" }, @@ -22443,8 +22468,8 @@ "T1071.004", "T1132.001", "T1132", - "T1048", - "T1071" + "T1071", + "T1048" ], "title": "DNS Exfiltration and Tunneling Tools Execution" }, @@ -22675,12 +22700,12 @@ "T1547.002", "T1557", "T1082", - "T1547", - "T1546", - "T1505", - "T1564", "T1556", - "T1574" + "T1547", + "T1505", + "T1546", + "T1574", + "T1564" ], "title": "Potential Suspicious Activity Using SeCEdit" }, @@ -23757,8 +23782,8 @@ "T1204.004", "TA0005", "T1027.010", - "T1204", - "T1027" + "T1027", + "T1204" ], "title": "Suspicious Explorer Process with Whitespace Padding - ClickFix/FileFix" }, @@ -27337,8 +27362,8 @@ "T1087.002", "T1069.002", "T1482", - "T1069", - "T1087" + "T1087", + "T1069" ], "title": "Active Directory Database Snapshot Via ADExplorer" }, @@ -27882,8 +27907,8 @@ "T1564.004", "T1552.001", "T1105", - "T1564", - "T1552" + "T1552", + "T1564" ], "title": "Remote File Download Via Findstr.EXE" }, @@ -28299,8 +28324,8 @@ "T1548.002", "T1546.001", "T1112", - "T1548", - "T1546" + "T1546", + "T1548" ], "title": "Registry Modification of MS-settings Protocol Handler" }, @@ -29039,8 +29064,8 @@ "TA0004", "T1055.001", "T1218.013", - "T1218", - "T1055" + "T1055", + "T1218" ], "title": "Mavinject Inject DLL Into Running Process" }, @@ -30306,8 +30331,8 @@ "T1059.003", "TA0005", "T1027.010", - "T1027", - "T1059" + "T1059", + "T1027" ], "title": "Suspicious Usage of For Loop with Recursive Directory Search in CMD" }, @@ -32037,8 +32062,8 @@ "T1482", "T1069.002", "stp.1u", - "T1087", - "T1069" + "T1069", + "T1087" ], "title": "PUA - AdFind Suspicious Execution" }, @@ -32085,8 +32110,8 @@ "T1047", "T1204.002", "T1218.010", - "T1218", - "T1204" + "T1204", + "T1218" ], "title": "Suspicious Microsoft Office Child Process" }, @@ -32110,8 +32135,8 @@ "T1587.001", "TA0002", "T1569.002", - "T1569", - "T1587" + "T1587", + "T1569" ], "title": "PUA - CsExec Execution" }, @@ -35077,8 +35102,8 @@ "TA0002", "T1059.001", "T1087", - "T1059", - "T1069" + "T1069", + "T1059" ], "title": "HackTool - Bloodhound/Sharphound Execution" }, @@ -36335,8 +36360,8 @@ "TA0005", "T1548.002", "T1218.003", - "T1218", - "T1548" + "T1548", + "T1218" ], "title": "Bypass UAC via CMSTP" }, @@ -36383,8 +36408,8 @@ "T1570", "TA0002", "T1569.002", - "T1569", - "T1021" + "T1021", + "T1569" ], "title": "Rundll32 Execution Without Parameters" }, @@ -36718,8 +36743,8 @@ "TA0005", "T1219.002", "T1036.003", - "T1219", - "T1036" + "T1036", + "T1219" ], "title": "Remote Access Tool - Renamed MeshAgent Execution - Windows" }, @@ -36872,8 +36897,8 @@ "TA0002", "T1059.001", "T1562.001", - "T1059", - "T1562" + "T1562", + "T1059" ], "title": "Obfuscated PowerShell OneLiner Execution" }, @@ -37143,8 +37168,8 @@ "TA0004", "T1543.003", "T1562.001", - "T1562", - "T1543" + "T1543", + "T1562" ], "title": "Devcon Execution Disabling VMware VMCI Device" }, @@ -37306,8 +37331,8 @@ "TA0005", "T1036.004", "T1036.005", - "T1053", - "T1036" + "T1036", + "T1053" ], "title": "Scheduled Task Creation Masquerading as System Processes" }, @@ -38085,8 +38110,8 @@ "car.2013-08-001", "T1053.005", "T1059.001", - "T1059", - "T1053" + "T1053", + "T1059" ], "title": "HackTool - Default PowerSploit/Empire Scheduled Task Creation" }, @@ -39853,8 +39878,8 @@ "T1218.014", "T1036.002", "T1036", - "T1204", - "T1218" + "T1218", + "T1204" ], "title": "MMC Executing Files with Reversed Extensions Using RTLO Abuse" }, @@ -41304,8 +41329,8 @@ "T1218.011", "TA0006", "T1003.001", - "T1218", - "T1003" + "T1003", + "T1218" ], "title": "Process Access via TrolleyExpress Exclusion" }, @@ -41417,8 +41442,8 @@ "TA0003", "T1053.005", "T1059.001", - "T1059", - "T1053" + "T1053", + "T1059" ], "title": "Scheduled Task Executing Payload from Registry" }, @@ -42265,8 +42290,8 @@ "T1558.003", "TA0008", "T1550.003", - "T1550", - "T1558" + "T1558", + "T1550" ], "title": "HackTool - Rubeus Execution" }, @@ -42399,9 +42424,9 @@ "T1218.007", "TA0002", "T1059.001", - "T1027", + "T1059", "T1218", - "T1059" + "T1027" ], "title": "Obfuscated PowerShell MSI Install via WindowsInstaller COM" }, @@ -42449,8 +42474,8 @@ "T1133", "T1136.001", "T1021.001", - "T1021", - "T1136" + "T1136", + "T1021" ], "title": "User Added to Remote Desktop Users Group" }, @@ -43464,8 +43489,8 @@ "T1564.004", "T1552.001", "T1105", - "T1552", - "T1564" + "T1564", + "T1552" ], "title": "Insensitive Subfolder Search Via Findstr.EXE" }, @@ -43715,8 +43740,8 @@ "TA0003", "T1053.005", "T1059.001", - "T1059", - "T1053" + "T1053", + "T1059" ], "title": "Scheduled Task Executing Encoded Payload from Registry" }, @@ -43825,8 +43850,8 @@ "T1059.001", "T1059.003", "T1564.003", - "T1564", - "T1059" + "T1059", + "T1564" ], "title": "Powershell Executed From Headless ConHost Process" }, @@ -47357,9 +47382,9 @@ "T1021.002", "T1543.003", "T1569.002", - "T1569", + "T1543", "T1021", - "T1543" + "T1569" ], "title": "Potential CobaltStrike Service Installations - Registry" }, @@ -48735,8 +48760,8 @@ "T1204.004", "TA0005", "T1027.010", - "T1027", - "T1204" + "T1204", + "T1027" ], "title": "Suspicious Space Characters in RunMRU Registry Path - ClickFix" }, @@ -49244,8 +49269,8 @@ "T1204.004", "TA0005", "T1027.010", - "T1027", - "T1204" + "T1204", + "T1027" ], "title": "Suspicious Space Characters in TypedPaths Registry Path - FileFix" }, @@ -50984,8 +51009,8 @@ "T1059.001", "T1027.010", "detection.threat-hunting", - "T1059", - "T1027" + "T1027", + "T1059" ], "title": "Invocation Of Crypto-Classes From The \"Cryptography\" PowerShell Namespace" }, @@ -51291,8 +51316,8 @@ "attack.s0039", "detection.threat-hunting", "T1069", - "T1021", - "T1087" + "T1087", + "T1021" ], "title": "Net.EXE Execution" }, @@ -52077,9 +52102,9 @@ "T1027.010", "T1547.001", "detection.threat-hunting", - "T1547", "T1059", - "T1027" + "T1027", + "T1547" ], "title": "Registry Set With Crypto-Classes From The \"Cryptography\" PowerShell Namespace" }, @@ -53084,8 +53109,8 @@ "TA0008", "T1563.002", "T1021.001", - "T1021", - "T1563" + "T1563", + "T1021" ], "title": "Possible RDP Hijacking" }, @@ -54780,9 +54805,9 @@ "T1021.002", "T1569.002", "T1569", + "T1543", "T1136", - "T1021", - "T1543" + "T1021" ], "title": "PSExec Lateral Movement" },