Query: alert when Detects windows utilities loading an unsigned or untrusted DLL. Adversaries often abuse those programs to proxy executio
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 process access requests from hacktool processes based on their default image name. Logsource: windows / process_access. Rule: title: HackTool - Generic Process Access id: d0d2f720-d14f-448d-8242-51ff396a334e status: test description: Detects process access requests from hacktool processes based on their default image name references: - https://jsecurity101.medium.com/bypassing-access-mask-auditing-strategies-480fb641c158 - https://www.splunk.com/en_us/blog/security/you-bet-your-lsass-hunting-lsass-access.html author: Nasreddine Bencherchali (Nextron Systems), Swachchhanda Shrawan Poudel date: 2023-11-27 tags: - attack.credential-access - attack.t1003.001 - attack.s0002 logsource: category: process_access product: windows detection: selection: - SourceImage|endswith: - \Akagi.exe - \Akagi64.exe - \atexec_windows.exe - \Certify.exe - \Certipy.exe - \CoercedPotato.exe - \crackmapexec.exe - \CreateMiniDump.exe - \dcomexec_windows.exe - \dpapi_windows.exe - \findDelegation_windows.exe - \GetADUsers_windows.exe - \GetNPUsers_windows.exe - \getPac_windows.exe - \getST_windows.exe - \getTGT_windows.exe - \GetUserSPNs_windows.exe - \gmer.exe - \hashcat.exe - \htran.exe - \ifmap_windows.exe - \impersonate.exe - \Inveigh.exe - \LocalPotato.exe - \mimikatz_windows.exe - \mimikatz.exe - \netview_windows.exe - \nmapAnswerMachine_windows.exe - \opdump_windows.exe - \PasswordDump.exe - \Potato.exe - \PowerTool.exe - \PowerTool64.exe - \psexec_windows.exe - \PurpleSharp.exe - \pypykatz.exe - \QuarksPwDump.exe - \rdp_check_windows.exe - \Rubeus.exe - \SafetyKatz.exe - \sambaPipe_windows.exe - \SelectMyParent.exe - \SharpChisel.exe - \SharPersist.exe - \SharpEvtMute.exe - \SharpImpersonation.exe - \SharpLDAPmonitor.exe - \SharpLdapWhoami.exe - \SharpUp.exe - \SharpView.exe - \smbclient_windows.exe - \smbserver_windows.exe - \sniff_windows.exe - \sniffer_windows.exe - \split_windows.exe - \SpoolSample.exe - \Stracciatella.exe - \SysmonEOP.exe - \temp\rot.exe - \ticketer_windows.exe - \TruffleSnout.exe - \winPEASany_ofs.exe - \winPEASany.exe - \winPEASx64_ofs.exe - \winPEASx64.exe - \winPEASx86_ofs.exe - \winPEASx86.exe - \xordump.exe - SourceImage|contains: - \goldenPac - \just_dce_ - \karmaSMB - \kintercept - \LocalPotato - \ntlmrelayx - \rpcdump - \samrdump - \secretsdump - \smbexec - \smbrelayx - \wmiexec - \wmipersist - HotPotato - Juicy Potato - JuicyPotato - PetitPotam - RottenPotato condition: selection falsepositives: - Unlikely level: high