Query: detection rule: Adversaries may acquire credentials from web browsers by reading files specific to the target browser. Web browsers comm
Matching passage: Sigma rule: Adversaries may acquire credentials from web browsers by reading files specific to the target browser. Web browsers comm. Logsource: windows / process_creation. Rule: title: Potential Browser Data Stealing id: 47147b5b-9e17-4d76-b8d2-7bac24c5ce1b related: - id: fc028194-969d-4122-8abe-0470d5b8f12f type: derived status: test description: 'Adversaries may acquire credentials from web browsers by reading files specific to the target browser. Web browsers commonly save credentials such as website usernames and passwords so that they do not need to be entered manually in the future. Web browsers typically store the credentials in an encrypted format within a credential store. ' references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1555.003/T1555.003.md - https://www.cisa.gov/sites/default/files/2024-04/aa24-109a-stopransomware-akira-ransomware_2.pdf author: Nasreddine Bencherchali (Nextron Systems) date: 2022-12-23 modified: 2025-03-19 tags: - attack.credential-access - attack.t1555.003 logsource: category: process_creation product: windows detection: selection_cmd: - CommandLine|contains: - copy-item - 'copy ' - 'cpi ' - ' cp ' - 'move ' - move-item - ' mi ' - ' mv ' - Image|endswith: - \esentutl.exe - \xcopy.exe - \robocopy.exe - OriginalFileName: - esentutl.exe - XCOPY.EXE - robocopy.exe selection_path: CommandLine|contains: - \Amigo\User Data - \BraveSoftware\Brave-Browser\User Data - \CentBrowser\User Data - \Chromium\User Data - \CocCoc\Browser\User Data - \Comodo\Dragon\User Data - \Elements Browser\User Data - \Epic Privacy Browser\User Data - \Google\Chrome Beta\User Data - \Google\Chrome SxS\User Data - \Google\Chrome\User Data\ - \Kometa\User Data - \Maxthon5\Users - \Microsoft\Edge\User Data - \Mozilla\Firefox\Profiles - \Nichrome\User Data - \Opera Software\Opera GX Stable\ - \Opera Software\Opera Neon\User Data - \Opera Software\Opera Stable\ - \Orbitum\User Data - \QIP Surf\User Data - \Sputnik\User Data - \Torch\User Data - \uCozMedia\Uran\User Data - \Vivaldi\User Data condition: all of selection_* falsepositives: - Unknown level: medium
Near-miss passage: Sigma rule: Detects rundll32 loading a renamed comsvcs.dll to dump process memory. Logsource: windows / image_load. Rule: title: Suspicious Renamed Comsvcs DLL Loaded By Rundll32 id: 8cde342c-ba48-4b74-b615-172c330f2e93 status: test description: Detects rundll32 loading a renamed comsvcs.dll to dump process memory references: - https://twitter.com/sbousseaden/status/1555200155351228419 author: Nasreddine Bencherchali (Nextron Systems) date: 2022-08-14 modified: 2023-02-17 tags: - attack.credential-access - attack.t1003.001 logsource: product: windows category: image_load detection: selection: Image|endswith: \rundll32.exe Hashes|contains: - IMPHASH=eed93054cb555f3de70eaa9787f32ebb - IMPHASH=5e0dbdec1fce52daae251a110b4f309d - IMPHASH=eadbccbb324829acb5f2bbe87e5549a8 - IMPHASH=407ca0f7b523319d758a40d7c0193699 - IMPHASH=281d618f4e6271e527e6386ea6f748de filter: ImageLoaded|endswith: \comsvcs.dll condition: selection and not filter falsepositives: - Unlikely level: high