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Lz py installer detection #1198

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merged 2 commits into from
Apr 23, 2024
Merged

Lz py installer detection #1198

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a172760
Improved detection of newer PyInstallers
Apr 17, 2024
92e2b8d
Improved detections, added empty and corrupt
Apr 17, 2024
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Improved detection of newer PyInstallers
  • Loading branch information
Ladislav Zezula committed Apr 17, 2024
commit a172760cd8f0c0e50134837811b8ce9eb7988d8f
46 changes: 38 additions & 8 deletions support/yara_patterns/tools/pe/x86/installers.yara
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Original file line number Diff line number Diff line change
Expand Up @@ -461,22 +461,52 @@ rule pyinstaller_30_38
all of them
}

rule pyinstaller_39_plus
rule pyinstaller_39
{
meta:
tool = "I"
name = "PyInstaller"
version = "3.9+"
version = "3.9"
strength = "high"
strings:
$s00 = "Failed to get address for PySys_SetObject"
$s01 = "Failed to copy %s"
$s02 = "Error loading Python DLL '%s'"
$s03 = "_PYI_ONEDIR_MODE"
$s00 = "Cannot open PyInstaller archive from executable (%s) or external archive (%s)"
$s01 = "Cannot open self %s or archive %s"
$s10 = "PyInstaller: FormatMessageW failed."
$s11 = "PyInstaller: pyi_win32_utils_to_utf8 failed."
$s12 = "bpython39.dll"
$s13 = /PYZ-\d\d.pyz/
$s14 = { 4D 45 49 0C 0B 0A 0B 0E } // PyInstaller magic number
condition:
pe.number_of_resources > 0 and
@s00 < pe.sections[2].raw_data_offset and
all of them
@s12 > pe.overlay.offset and
@s13 > pe.overlay.offset and
@s14 > pe.overlay.offset and
1 of ($s0*) and
all of ($s1*)
}

rule pyinstaller_310_plus
{
meta:
tool = "I"
name = "PyInstaller"
version = "3.10+"
strength = "high"
strings:
$s00 = "Cannot open PyInstaller archive from executable (%s) or external archive (%s)"
$s01 = "Cannot open self %s or archive %s"
$s10 = /PyInstalle(r|m): FormatMessageW failed./
$s11 = /PyInstalle(r|m): pyi_win32_utils_to_utf8 failed./
$s12 = /bpython31\d.dll/
$s13 = /PYZ-\d\d.pyz/
$s14 = { 4D 45 49 0C 0B 0A 0B 0E } // PyInstaller magic number
condition:
pe.number_of_resources > 0 and
@s12 > pe.overlay.offset and
@s13 > pe.overlay.offset and
@s14 > pe.overlay.offset and
1 of ($s0*) and
all of ($s1*)
}

rule installanywhere_61 {
Expand Down