LoFP LoFP / file names with legitimate cyrillic text. will likely require tuning (or not be usable) in countries where these alphabets are in use.

Techniques

Sample rules

Potential Homoglyph Attack Using Lookalike Characters in Filename

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.

Detection logic

condition: 1 of selection_*
selection_lower:
  TargetFilename|contains:
  - "\u0430"
  - "\u0435"
  - "\u043E"
  - "\u0440"
  - "\u0441"
  - "\u0445"
  - "\u0455"
  - "\u0456"
  - "\u04CF"
  - "\u0458"
  - "\u04BB"
  - "\u0501"
  - "\u051B"
  - "\u051D"
  - "\u03BF"
selection_upper:
  TargetFilename|contains:
  - "\u0410"
  - "\u0412"
  - "\u0415"
  - "\u041A"
  - "\u041C"
  - "\u041D"
  - "\u041E"
  - "\u0420"
  - "\u0421"
  - "\u0422"
  - "\u0425"
  - "\u0405"
  - "\u0406"
  - "\u0408"
  - "\u04AE"
  - "\u04C0"
  - "\u050C"
  - "\u051A"
  - "\u051C"
  - "\u0391"
  - "\u0392"
  - "\u0395"
  - "\u0396"
  - "\u0397"
  - "\u0399"
  - "\u039A"
  - "\u039C"
  - "\u039D"
  - "\u039F"
  - "\u03A1"
  - "\u03A4"
  - "\u03A5"
  - "\u03A7"