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Added tests for more versions of Petite packer #735

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Apr 9, 2020
Merged

Added tests for more versions of Petite packer #735

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34 changes: 19 additions & 15 deletions support/yara_patterns/tools/pe/x86/packers.yara
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Original file line number Diff line number Diff line change
Expand Up @@ -10414,7 +10414,7 @@ rule re_pack_100_02 {
strings:
$1 = { C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 0D 0A 20 2D 3D FE 20 50 45 2D 50 41 43 4B 20 76 31 2E 30 20 2D FE 2D 20 28 43 29 20 43 6F 70 79 72 69 67 68 74 20 31 39 39 38 20 62 79 20 41 4E 41 4B 69 4E 20 FE 3D 2D 20 0D 0A C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 C4 }
condition:
$1 at pe.entry_point
$1
}

rule pe_protect_09_01 {
Expand Down Expand Up @@ -11710,9 +11710,9 @@ rule petite_12 {
tool = "P"
name = "Petite"
version = "1.2"
pattern = "9C60E8CA??????03??04??05??06??07??08"
pattern = "(66)9C60E8CA??????03??04??05??06??07??08"
strings:
$1 = { 9C 60 E8 CA ?? ?? ?? 03 ?? 04 ?? 05 ?? 06 ?? 07 ?? 08 }
$1 = { (66) 9C 60 E8 CA ?? ?? ?? 03 ?? 04 ?? 05 ?? 06 ?? 07 ?? 08 }
condition:
$1 at pe.entry_point
}
Expand Down Expand Up @@ -11866,33 +11866,37 @@ rule petite_22_03 {
tool = "P"
name = "Petite"
version = "2.2"
pattern = "B8??????????68????????64FF350000000064892500000000669C6050680000????8B3C248B306681C780078D74060889388B5E1050566A026880080000576A??6A06566A04688008000057FFD383EE0859F3A5596683C76881C6????0000F3A5FFD3588D90B80100008B0A0FBAF11F73168B0424FD8BF08BF8037204037A08F3A583C20CFCEBE283C2108B5AF485DB74D88B04248B7AF803F8528D3401EB175858585A74C4E91C"
pattern = "B800??????6A0068????????64FF350000000064892500000000669C60508BD8030068??????006A00FF501C8bcc8d"
strings:
$1 = { B8 ?? ?? ?? ?? ?? 68 ?? ?? ?? ?? 64 FF 35 00 00 00 00 64 89 25 00 00 00 00 66 9C 60 50 68 00 00 ?? ?? 8B 3C 24 8B 30 66 81 C7 80 07 8D 74 06 08 89 38 8B 5E 10 50 56 6A 02 68 80 08 00 00 57 6A ?? 6A 06 56 6A 04 68 80 08 00 00 57 FF D3 83 EE 08 59 F3 A5 59 66 83 C7 68 81 C6 ?? ?? 00 00 F3 A5 FF D3 58 8D 90 B8 01 00 00 8B 0A 0F BA F1 1F 73 16 8B 04 24 FD 8B F0 8B F8 03 72 04 03 7A 08 F3 A5 83 C2 0C FC EB E2 83 C2 10 8B 5A F4 85 DB 74 D8 8B 04 24 8B 7A F8 03 F8 52 8D 34 01 EB 17 58 58 58 5A 74 C4 E9 1C }
$1 = { B8 00 ?? ?? ?? 6A 00 68 ?? ?? ?? ?? 64 FF 35 00 00 00 00 64 89 25 00 00 00 00 66 9C 60 50 8B D8 03 00 68 ?? ?? ?? 00 6A 00 FF 50 1C 8b cc 8d }
$2 = { B8 00 ?? ?? ?? 68 ?? ?? ?? ?? 64 FF 35 00 00 00 00 64 89 25 00 00 00 00 66 9C 60 50 68 00 00 ?? ?? 8b 3c 24 8b 30 66 81 c7 80 07 8d 74 }
condition:
$1 at pe.entry_point
$1 at pe.entry_point or
$2 at pe.entry_point
}

rule petite_22_or_higher {
rule petite_23 {
meta:
tool = "P"
name = "Petite"
version = "2.2 or higher"
pattern = "B8????????6A??68????????64FF350000000064892500000000669C60508BD8030068????????6A00FF50"
version = "2.3"
pattern = "B800??????(6A00)68????????64FF350000000064892500000000669C60508BD8030068????0?006A00FF501C894308"
strings:
$1 = { B8 ?? ?? ?? ?? 6A ?? 68 ?? ?? ?? ?? 64 FF 35 00 00 00 00 64 89 25 00 00 00 00 66 9C 60 50 8B D8 03 00 68 ?? ?? ?? ?? 6A 00 FF 50 }
$1 = { B8 00 ?? ?? ?? 6A 00 68 ?? ?? ?? ?? 64 FF 35 00 00 00 00 64 89 25 00 00 00 00 66 9C 60 50 8B D8 03 00 68 ?? ?? ?? 00 6A 00 FF 50 1C 89 43 08 }
$2 = { B8 00 ?? ?? ?? 68 ?? ?? ?? ?? 64 FF 35 00 00 00 00 64 89 25 00 00 00 00 66 9C 60 50 8B D8 03 00 68 ?? ?? ?? 00 6A 00 FF 50 1C 89 43 08 }
condition:
$1 at pe.entry_point
$1 at pe.entry_point or
$2 at pe.entry_point
}

rule petite_23 {
rule petite_24 {
meta:
tool = "P"
name = "Petite"
version = "2.3"
pattern = "B800?0??0068????4?0064FF350000000064892500000000669C60508BD8030068????0?006A00FF501C89430868000040008B3C248B336681C780078D741E08893B538B5E10B880080000566A0250576A??6A0A566A045057FFD383EE0859F3A5596683"
version = "2.4"
pattern = "B8????????608DA8??????F?68????????6A40680030000068??????006A00ff90????00008944241Cbb????00008db5??????008bf850E80?0000007407"
strings:
$1 = { B8 00 ?0 ?? 00 68 ?? ?? 4? 00 64 FF 35 00 00 00 00 64 89 25 00 00 00 00 66 9C 60 50 8B D8 03 00 68 ?? ?? 0? 00 6A 00 FF 50 1C 89 43 08 68 00 00 40 00 8B 3C 24 8B 33 66 81 C7 80 07 8D 74 1E 08 89 3B 53 8B 5E 10 B8 80 08 00 00 56 6A 02 50 57 6A ?? 6A 0A 56 6A 04 50 57 FF D3 83 EE 08 59 F3 A5 59 66 83 }
$1 = { B8 ?? ?? ?? ?? 60 8D A8 ?? ?? ?? F? 68 ?? ?? ?? ?? 6A 40 68 00 30 00 00 68 ?? ?? ?? 00 6A 00 ff 90 ?? ?? 00 00 89 44 24 1C bb ?? ?? 00 00 8d b5 ?? ?? ?? 00 8b f8 50 E8 0? 00 00 00 74 07 }
condition:
$1 at pe.entry_point
}
Expand Down