Query: rule covering Detects the presence of unicode characters which are homoglyphs, or identical in appearance, to ASCII letter characters.
Matching passage: Sigma rule: Detects the presence of unicode characters which are homoglyphs, or identical in appearance, to ASCII letter characters.. Logsource: windows / process_creation. Rule: title: Potential Homoglyph Attack Using Lookalike Characters id: 32e280f1-8ad4-46ef-9e80-910657611fbc status: test description: 'Detects the presence of unicode characters which are homoglyphs, or identical in appearance, to ASCII letter characters. This is used as an obfuscation and masquerading techniques. Only "perfect" homoglyphs are included; these are characters that are indistinguishable from ASCII characters and thus may make excellent candidates for homoglyph attack characters. ' references: - https://redcanary.com/threat-detection-report/threats/socgholish/#threat-socgholish - http://www.irongeek.com/homoglyph-attack-generator.php author: Micah Babinski, @micahbabinski date: 2023-05-07 tags: - attack.stealth - attack.t1036 - attack.t1036.003 logsource: category: process_creation product: windows detection: selection_upper: CommandLine|contains: - А - В - Е - К - М - Н - О - Р - С - Т - Х - Ѕ - І - Ј - Ү - Ӏ - Ԍ - Ԛ - Ԝ - Α - Β - Ε - Ζ - Η - Ι - Κ - Μ - Ν - Ο - Ρ - Τ - Υ - Χ selection_lower: CommandLine|contains: - а - е - о - р - с - х - ѕ - і - ӏ - ј - һ - ԁ - ԛ - ԝ - ο condition: 1 of selection_* falsepositives: - Commandlines with legitimate Cyrillic text; will likely require tuning (or not be usable) in countries where these alphabets are in use. level: medium
Near-miss passage: Sigma rule: Detects loading of known malicious drivers via the file name of the drivers.. Logsource: windows / driver_load. Rule: title: Malicious Driver Load By Name id: 39b64854-5497-4b57-a448-40977b8c9679 status: test description: Detects loading of known malicious drivers via the file name of the drivers. references: - https://loldrivers.io/ author: Nasreddine Bencherchali (Nextron Systems) date: 2022-10-03 modified: 2023-12-02 tags: - attack.persistence - attack.privilege-escalation - attack.t1543.003 - attack.t1068 logsource: product: windows category: driver_load detection: selection: ImageLoaded|endswith: - \wfshbr64.sys - \ktmutil7odm.sys - \ktes.sys - \a26363e7b02b13f2b8d697abb90cd5c3.sys - \kt2.sys - \4748696211bd56c2d93c21cab91e82a5.sys - \malicious.sys - \a236e7d654cd932b7d11cb604629a2d0.sys - \spwizimgvt.sys - \c94f405c5929cfcccc8ad00b42c95083.sys - \fur.sys - \wantd.sys - \windbg.sys - \4118b86e490aed091b1a219dba45f332.sys - \gmer64.sys - \1fc7aeeff3ab19004d2e53eae8160ab1.sys - \poortry2.sys - \wintapix.sys - \daxin_blank6.sys - \6771b13a53b9c7449d4891e427735ea2.sys - \blacklotus_driver.sys - \air_system10.sys - \dkrtk.sys - \7.sys - \sense5ext.sys - \ktgn.sys - \ndislan.sys - \nlslexicons0024uvn.sys - \be6318413160e589080df02bb3ca6e6a.sys - \4.sys - \wantd_2.sys - \e29f6311ae87542b3d693c1f38e4e3ad.sys - \daxin_blank3.sys - \gftkyj64.sys - \daxin_blank2.sys - \wantd_4.sys - \reddriver.sys - \834761775.sys - \mlgbbiicaihflrnh.sys - \mjj0ge.sys - \daxin_blank.sys - \daxin_blank5.sys - \poortry1.sys - \msqpq.sys - \mimidrv.sys - \e939448b28a4edc81f1f974cebf6e7d2.sys - \prokiller64.sys - \nodedriver.sys - \wantd_3.sys - \lctka.sys - \kapchelper_x64.sys - \daxin_blank4.sys - \a9df5964635ef8bd567ae487c3d214c4.sys - \wantd_6.sys - \ntbios.sys - \wantd_5.sys - \pciecubed.sys - \mimikatz.sys - \nqrmq.sys - \2.sys - \poortry.sys - \ntbios_2.sys - \fgme.sys - \telephonuafy.sys - \typelibde.sys - \daxin_blank1.sys - \ef0e1725aaf0c6c972593f860531a2ea.sys - \5a4fe297c7d42539303137b6d75b150d.sys condition: selection falsepositives: - False positives may occur if one of the vulnerable driver names mentioned above didn't change its name between versions. So always make sure that the driver being loaded is the legitimate one and the non vulnerable version. - If you experience a lot of FP you could comment the driver name or its exact known legitimate location (when possible) level: medium