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ZLoader Anti-Sandbox Formula
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rule msxls_zloader_anti_sandbox_biff_formula | |
{ | |
meta: | |
description = "Finding XLS2003 documents with a specific anti-sandbox expression" | |
Author = "Michael Weber (@BouncyHat)" | |
strings: | |
$ole_marker = {D0 CF 11 E0 A1 B1 1A E1} | |
$anti_sandbox_formula = { 06 00 [20-30] 42 00 AD 80 1E 13 00 41 BA 00 1E 0D 00 41 BA 00 1E 02 03 0D 1E 0E 00 41 BA 00 1E 86 01 0D 1E 1F 00 41 BA 00 1D 00 0B 1E 2A 00 41 BA 00 42 06 24 00 } | |
condition: | |
$ole_marker at 0 and $anti_sandbox_formula | |
} |
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New ZLoader Sample slightly changes this - modifying the signature to cover both