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improved YARA rules for Wise installer #865

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Oct 6, 2020
Merged

improved YARA rules for Wise installer #865

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43 changes: 40 additions & 3 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 @@ -679,11 +679,48 @@ rule wise_installer_uv_04 {
meta:
tool = "I"
name = "Wise Installer"
pattern = "558BEC81EC780500005356BE04010000578D8594FDFFFF5633DB5053FF15342040008D8594FDFFFF56508D8594FDFFFF50FF15302040008B3D2C20400053536A03536A018D8594FDFFFF680000008050FFD783F8FF8945FC0F847B0100008D8590FCFFFF5056FF15282040008D8598FEFFFF50538D8590FCFFFF681030400050FF15242040005368800000006A0253538D8598FEFFFF680000004050FFD783F8FF8945F40F842F"
strings:
$1 = { 55 8B EC 81 EC 78 05 00 00 53 56 BE 04 01 00 00 57 8D 85 94 FD FF FF 56 33 DB 50 53 FF 15 34 20 40 00 8D 85 94 FD FF FF 56 50 8D 85 94 FD FF FF 50 FF 15 30 20 40 00 8B 3D 2C 20 40 00 53 53 6A 03 53 6A 01 8D 85 94 FD FF FF 68 00 00 00 80 50 FF D7 83 F8 FF 89 45 FC 0F 84 7B 01 00 00 8D 85 90 FC FF FF 50 56 FF 15 28 20 40 00 8D 85 98 FE FF FF 50 53 8D 85 90 FC FF FF 68 10 30 40 00 50 FF 15 24 20 40 00 53 68 80 00 00 00 6A 02 53 53 8D 85 98 FE FF FF 68 00 00 00 40 50 FF D7 83 F8 FF 89 45 F4 0F 84 2F }
$1 = { 55 8B EC 81 EC 78 05 00 00 53 56 BE 04 01 00 00 57 8D 85 94 FD FF FF 56 33 DB 50 53 FF 15 3? 20 40 00 8D 85 94 FD FF FF 56 50 8D 85 94 FD FF FF 50 FF 15 3? 20 40 00 8B 3D ?? 20 40 00 53 53 6A }
$2 = { 55 8b ec 81 ec 74 05 00 00 53 8d 85 98 fd ff ff 56 33 db 57 be 04 01 00 00 56 50 53 ff 15 b4 40 40 00 56 8d 85 98 fd ff ff 50 50 ff 15 8c 40 40 00 53 8d 8d 98 fd ff ff 53 6a 03 53 6a 01 68 00 }
$3 = { 55 8b ec 81 ec 7c 05 00 00 53 56 57 be 04 01 00 00 56 8d 85 90 fd ff ff 33 db 50 53 89 5d f4 ff 15 38 20 40 00 56 8d 85 90 fd ff ff 50 50 ff 15 34 20 40 00 8b 3d 30 20 40 00 53 53 6a 03 53 6a }
condition:
$1 at pe.entry_point
$1 at pe.entry_point or
$2 at pe.entry_point or
$3 at pe.entry_point
}

rule wise_installer_uv_05 {
meta:
tool = "I"
name = "Wise Installer"
strings:
$s01 = "WISE_SETUP_EXE_PATH=\"%s\""
$s02 = "Wise Installation"
$s03 = "WiseInitLangAlwaysPrompt"
$s04 = "Initializing Wise Installation Wizard..."
condition:
pe.number_of_sections == 5 and
pe.sections[3].name == ".WISE" and
all of them
}

rule wise_installer_uv_06 {
meta:
tool = "I"
name = "Wise Installer"
strings:
$h01 = { 64 a1 00 00 00 00 55 8b ec 6a ff 68 ?? ?? ?? ?? 68 ?? ?? ?? ?? 50 64 89 25 00 00 00 00 83 ec }
$h02 = { 55 8b ec 6a ff 68 ?? ?? ?? ?? 68 ?? ?? ?? ?? 64 a1 00 00 00 00 50 64 89 25 00 00 00 00 83 ec }
$s01 = "GLBSInstall"
$s02 = "System DLLs corrupt or missing."
$s03 = "Could not locate installer DLL."
$s04 = "WiseMain"
$s05 = "Corrupt installation detected."
$s06 = "The installation file may be corrupt."
condition:
pe.number_of_sections >= 4 and
($h01 at pe.entry_point or $h02 at pe.entry_point) and
4 of ($s*)
}

rule wise_installer_110 {
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