Query: detection rule: Detects potential DLL sideloading of vcruntime140.dll, a common C++ runtime library. Threat actors have been observed us
Matching passage: Sigma rule: Detects potential DLL sideloading of vcruntime140.dll, a common C++ runtime library. Threat actors have been observed us. Logsource: windows / image_load. Rule: title: Potential Vcruntime140 DLL Sideloading id: d7a63acb-1284-49bc-bfea-7771146c8b1c status: experimental description: 'Detects potential DLL sideloading of vcruntime140.dll, a common C++ runtime library. Threat actors have been observed using DLL sideloading techniques to load malicious payloads under the guise of legitimate applications such as SqlWriter, SqlDumper etc. Notably, APT29 has been documented leveraging WinELOADER to sideload vcruntime140.dll for executing malicious code. ' references: - https://www.mandiant.com/resources/blog/apt29-wineloader-german-political-parties - https://www.zscaler.com/blogs/security-research/european-diplomats-targeted-spikedwine-wineloader - https://www.nextron-systems.com/2023/09/15/detecting-janelarat-with-yara-and-thor/ author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2026-01-12 modified: 2026-05-18 tags: - attack.persistence - attack.privilege-escalation - attack.execution - attack.stealth - attack.t1574.001 logsource: category: image_load product: windows detection: selection: ImageLoaded|endswith: \vcruntime140.dll filter_main_legitimate_path: ImageLoaded|startswith: - C:\Windows\System32\ - C:\Windows\SysWOW64\ - C:\Program Files\ - C:\Program Files (x86)\ filter_main_legitimate_signer: Signed: true SignatureStatus: Valid Description|endswith: C Runtime Library filter_optional_onedrive: Image|startswith: C:\Users\ Image|contains: \AppData\Local\Microsoft\OneDrive\ condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Unknown level: high regression_tests_path: regression_data/rules/windows/image_load/image_load_side_load_vcruntime140/info.yml
Near-miss passage: Sigma rule: Detects the import or deletion of key material in AWS KMS, which can be used as part of ransomware attacks. This activit. Logsource: aws / cloudtrail. Rule: title: AWS KMS Imported Key Material Usage id: 1279262f-1464-422f-ac0d-5b545320c526 status: experimental description: 'Detects the import or deletion of key material in AWS KMS, which can be used as part of ransomware attacks. This activity is uncommon and provides a high certainty signal. ' references: - https://www.chrisfarris.com/post/effective-aws-ransomware/ - https://docs.aws.amazon.com/kms/latest/developerguide/ct-importkeymaterial.html - https://docs.aws.amazon.com/kms/latest/developerguide/ct-deleteimportedkeymaterial.html author: toopricey date: 2025-10-18 tags: - attack.impact - attack.t1486 - attack.resource-development - attack.t1608.003 logsource: product: aws service: cloudtrail detection: selection: eventSource: kms.amazonaws.com eventName: - ImportKeyMaterial - DeleteImportedKeyMaterial condition: selection falsepositives: - Legitimate use cases for imported key material are rare, but may include, Organizations with hybrid cloud architectures that import external key material for compliance requirements. - Development or testing environments that simulate external key management scenarios. Even in these cases, such activity is typically infrequent and should not add significant noise. level: high