Query: rule covering Detects changes to the Internet Explorer "DisableFirstRunCustomize" value, which prevents Internet Explorer from running
Matching passage: Sigma rule: Detects changes to the Internet Explorer "DisableFirstRunCustomize" value, which prevents Internet Explorer from running. Logsource: windows / registry_set. Rule: title: Internet Explorer DisableFirstRunCustomize Enabled id: ab567429-1dfb-4674-b6d2-979fd2f9d125 status: test description: 'Detects changes to the Internet Explorer "DisableFirstRunCustomize" value, which prevents Internet Explorer from running the first run wizard the first time a user starts the browser after installing Internet Explorer or Windows. ' references: - https://www.ncsc.gov.uk/static-assets/documents/malware-analysis-reports/devil-bait/NCSC-MAR-Devil-Bait.pdf - https://unit42.paloaltonetworks.com/operation-ke3chang-resurfaces-with-new-tidepool-malware/ - https://admx.help/?Category=InternetExplorer&Policy=Microsoft.Policies.InternetExplorer::NoFirstRunCustomise author: Nasreddine Bencherchali (Nextron Systems) date: 2023-05-16 modified: 2025-10-07 tags: - attack.defense-impairment logsource: product: windows category: registry_set detection: selection: TargetObject|endswith: \Microsoft\Internet Explorer\Main\DisableFirstRunCustomize Details: - DWORD (0x00000001) - DWORD (0x00000002) filter_main_generic: Image: - C:\Windows\explorer.exe - C:\Windows\System32\ie4uinit.exe filter_optional_avira: Image|contains|all: - \Temp\ - \.cr\avira_ Details|contains: DWORD (0x00000001) filter_optional_foxit: Image: - C:\Program Files (x86)\Foxit Software\Foxit PDF Reader\FoxitPDFReader.exe - C:\Program Files\Foxit Software\Foxit PDF Reader\FoxitPDFReader.exe Details|contains: DWORD (0x00000001) condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - As this is controlled by group policy as well as user settings. Some false positives may occur. level: medium
Near-miss passage: Sigma rule: Detects the deletion of an AWS SAML provider, potentially indicating malicious intent to disrupt administrative or secur. Logsource: aws / cloudtrail. Rule: title: AWS SAML Provider Deletion Activity id: ccd6a6c8-bb4e-4a91-9d2a-07e632819374 status: experimental description: 'Detects the deletion of an AWS SAML provider, potentially indicating malicious intent to disrupt administrative or security team access. An attacker can remove the SAML provider for the information security team or a team of system administrators, to make it difficult for them to work and investigate at the time of the attack and after it. ' references: - https://docs.aws.amazon.com/IAM/latest/APIReference/API_DeleteSAMLProvider.html author: Ivan Saakov date: 2024-12-19 tags: - attack.stealth - attack.t1078.004 - attack.privilege-escalation - attack.initial-access - attack.persistence - attack.t1531 - attack.impact logsource: product: aws service: cloudtrail detection: selection: eventSource: iam.amazonaws.com eventName: DeleteSAMLProvider status: success condition: selection falsepositives: - Automated processes using tools like Terraform may trigger this alert. - Legitimate administrative actions by authorized system administrators could cause this alert. Verify the user identity, user agent, and hostname to ensure they are expected. - Deletions by unfamiliar users should be investigated. If the behavior is known and expected, it can be exempted from the rule. level: medium