Query: detect Detects windows utilities loading an unsigned or untrusted DLL. Adversaries often abuse those programs to proxy executio in logs
Matching passage: Sigma rule: Detects windows utilities loading an unsigned or untrusted DLL. Adversaries often abuse those programs to proxy executio. Logsource: windows / image_load. Rule: title: Unsigned DLL Loaded by Windows Utility id: b5de0c9a-6f19-43e0-af4e-55ad01f550af status: test description: 'Detects windows utilities loading an unsigned or untrusted DLL. Adversaries often abuse those programs to proxy execution of malicious code. ' references: - https://www.elastic.co/security-labs/Hunting-for-Suspicious-Windows-Libraries-for-Execution-and-Evasion - https://akhere.hashnode.dev/hunting-unsigned-dlls-using-kql - https://unit42.paloaltonetworks.com/unsigned-dlls/?web_view=true author: Swachchhanda Shrawan Poudel date: 2024-02-28 modified: 2025-10-07 tags: - attack.stealth - attack.t1218.011 - attack.t1218.010 logsource: product: windows category: image_load detection: selection: Image|endswith: - \InstallUtil.exe - \RegAsm.exe - \RegSvcs.exe - \regsvr32.exe - \rundll32.exe filter_main_signed: Signed: 'true' filter_main_sig_status: SignatureStatus: - errorChaining - errorCode_endpoint - errorExpired - trusted - Valid filter_main_signed_null: Signed: null filter_main_signed_empty: Signed: - '' - '-' filter_main_sig_status_null: SignatureStatus: null filter_main_sig_status_empty: SignatureStatus: - '' - '-' filter_main_windows_installer: Image: - C:\Windows\SysWOW64\rundll32.exe - C:\Windows\System32\rundll32.exe ImageLoaded|startswith: C:\Windows\Installer\ ImageLoaded|endswith: - .tmp-\Microsoft.Deployment.WindowsInstaller.dll - .tmp-\Avira.OE.Setup.CustomActions.dll filter_main_assembly: Image|startswith: - C:\Windows\SysWOW64\ - C:\Windows\System32\ - C:\Windows\Microsoft.NET\Framework64 Image|endswith: \RegAsm.exe ImageLoaded|endswith: .dll ImageLoaded|startswith: C:\Windows\assembly\NativeImages filter_optional_klite_codec: Image: - C:\Windows\SysWOW64\regsvr32.exe - C:\Windows\System32\regsvr32.exe ImageLoaded|startswith: - C:\Program Files (x86)\K-Lite Codec Pack\ - C:\Program Files\K-Lite Codec Pack\ condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Unknown level: medium
Near-miss passage: Sigma rule: Detects the execution of UACMe, a tool used for UAC bypasses, via default PE metadata. Logsource: windows / process_creation. Rule: title: HackTool - UACMe Akagi Execution id: d38d2fa4-98e6-4a24-aff1-410b0c9ad177 status: test description: Detects the execution of UACMe, a tool used for UAC bypasses, via default PE metadata references: - https://github.com/hfiref0x/UACME author: Christian Burkard (Nextron Systems), Florian Roth (Nextron Systems) date: 2021-08-30 modified: 2024-11-23 tags: - attack.privilege-escalation - attack.t1548.002 logsource: category: process_creation product: windows detection: selection_pe: - Product: UACMe - Company: - REvol Corp - APT 92 - UG North - Hazardous Environments - CD Project Rekt - Description: - UACMe main module - Pentesting utility - OriginalFileName: - Akagi.exe - Akagi64.exe selection_img: Image|endswith: - \Akagi64.exe - \Akagi.exe selection_hashes_sysmon: Hashes|contains: - IMPHASH=767637C23BB42CD5D7397CF58B0BE688 - IMPHASH=14C4E4C72BA075E9069EE67F39188AD8 - IMPHASH=3C782813D4AFCE07BBFC5A9772ACDBDC - IMPHASH=7D010C6BB6A3726F327F7E239166D127 - IMPHASH=89159BA4DD04E4CE5559F132A9964EB3 - IMPHASH=6F33F4A5FC42B8CEC7314947BD13F30F - IMPHASH=5834ED4291BDEB928270428EBBAF7604 - IMPHASH=5A8A8A43F25485E7EE1B201EDCBC7A38 - IMPHASH=DC7D30B90B2D8ABF664FBED2B1B59894 - IMPHASH=41923EA1F824FE63EA5BEB84DB7A3E74 - IMPHASH=3DE09703C8E79ED2CA3F01074719906B condition: 1 of selection_* falsepositives: - Unknown level: high