Query: detect Detects process creation with suspicious whitespace padding followed by a '#' character, which may indicate ClickFix or in logs
Matching passage: Sigma rule: Detects process creation with suspicious whitespace padding followed by a '#' character, which may indicate ClickFix or. Logsource: windows / process_creation. Rule: title: Suspicious Explorer Process with Whitespace Padding - ClickFix/FileFix id: 3ae9974a-eb09-4044-8e70-8980a50c12c8 related: - id: 8f2a5c3d-9e4b-4a7c-8d1f-2e5a6b9c3d7e type: similar - id: 7a1b4c5e-8f3d-4b9a-7c2e-1f4a5b8c6d9e type: similar status: experimental description: 'Detects process creation with suspicious whitespace padding followed by a ''#'' character, which may indicate ClickFix or FileFix techniques used to conceal malicious commands from visual inspection. ClickFix and FileFix are social engineering attack techniques where adversaries distribute phishing documents or malicious links that deceive users into opening the Windows Run dialog box or File Explorer search bar. The victims are then instructed to paste commands from their clipboard, which contain extensive whitespace padding using various Unicode space characters to push the actual malicious command far to the right, effectively hiding it from immediate view. ' references: - https://expel.com/blog/cache-smuggling-when-a-picture-isnt-a-thousand-words/ - https://mrd0x.com/filefix-clickfix-alternative/ author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2025-11-04 modified: 2025-11-26 tags: - attack.execution - attack.stealth - attack.t1204.004 - attack.t1027.010 logsource: category: process_creation product: windows detection: selection_explorer: ParentImage|endswith: \explorer.exe CommandLine|contains: '#' selection_space_variation: CommandLine|contains: - - - - - - - - - - - - - ' ' condition: all of selection_* falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects the execution of "BitLockerToGo.EXE". BitLocker To Go is BitLocker Drive Encryption on removable data drives. Th. Logsource: windows / process_creation. Rule: title: BitLockerTogo.EXE Execution id: 7f2376f9-42ee-4dfc-9360-fecff9a88fc8 status: test description: 'Detects the execution of "BitLockerToGo.EXE". BitLocker To Go is BitLocker Drive Encryption on removable data drives. This feature includes the encryption of, USB flash drives, SD cards, External hard disk drives, Other drives that are formatted by using the NTFS, FAT16, FAT32, or exFAT file system. This is a rarely used application and usage of it at all is worth investigating. Malware such as Lumma stealer has been seen using this process as a target for process hollowing. ' references: - https://tria.ge/240521-ynezpagf56/behavioral1 - https://any.run/report/6eea2773c1b4b5c6fb7c142933e220c96f9a4ec89055bf0cf54accdcde7df535/a407f006-ee45-420d-b576-f259094df091 - https://bazaar.abuse.ch/sample/8c75f8e94486f5bbf461505823f5779f328c5b37f1387c18791e0c21f3fdd576/ - https://bazaar.abuse.ch/sample/64e6605496919cd76554915cbed88e56fdec10dec6523918a631754664b8c8d3/ author: Josh Nickels, mttaggart date: 2024-07-11 tags: - attack.stealth - attack.t1218 logsource: category: process_creation product: windows detection: selection: Image|endswith: \BitLockerToGo.exe condition: selection falsepositives: - Legitimate usage of BitLockerToGo.exe to encrypt portable devices. level: low