Query: Sigma rule for 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 changes to the PSFactory COM InProcServer32 registry. This technique was used by RomCom to create persistence st. Logsource: windows / registry_set. Rule: title: Potential PSFactoryBuffer COM Hijacking id: 243380fa-11eb-4141-af92-e14925e77c1b status: test description: Detects changes to the PSFactory COM InProcServer32 registry. This technique was used by RomCom to create persistence storing a malicious DLL. references: - https://blogs.blackberry.com/en/2023/06/romcom-resurfaces-targeting-ukraine - https://strontic.github.io/xcyclopedia/library/clsid_C90250F3-4D7D-4991-9B69-A5C5BC1C2AE6.html - https://www.virustotal.com/gui/file/6d3ab9e729bb03ae8ae3fcd824474c5052a165de6cb4c27334969a542c7b261d/detection - https://www.trendmicro.com/en_us/research/23/e/void-rabisu-s-use-of-romcom-backdoor-shows-a-growing-shift-in-th.html author: BlackBerry Threat Research and Intelligence Team - @Joseliyo_Jstnk date: 2023-06-07 modified: 2023-08-17 tags: - attack.privilege-escalation - attack.persistence - attack.t1546.015 logsource: category: registry_set product: windows detection: selection: TargetObject|endswith: \CLSID\{c90250f3-4d7d-4991-9b69-a5c5bc1c2ae6}\InProcServer32\(Default) filter_main: Details: - '%windir%\System32\ActXPrxy.dll' - C:\Windows\System32\ActXPrxy.dll condition: selection and not filter_main falsepositives: - Unknown level: high