rule win_shadowpad_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.shadowpad."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.shadowpad"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 885d0c e8???????? 8b45f4 0fb6fb }
            // n = 4, score = 200
            //   885d0c               | mov                 byte ptr [ebp + 0xc], bl
            //   e8????????           |                     
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   0fb6fb               | movzx               edi, bl

        $sequence_1 = { 8d8590efffff 50 ffd7 8d45bc 50 8d4590 50 }
            // n = 7, score = 200
            //   8d8590efffff         | lea                 eax, [ebp - 0x1070]
            //   50                   | push                eax
            //   ffd7                 | call                edi
            //   8d45bc               | lea                 eax, [ebp - 0x44]
            //   50                   | push                eax
            //   8d4590               | lea                 eax, [ebp - 0x70]
            //   50                   | push                eax

        $sequence_2 = { 33d2 85ff 7e25 8a0c56 8a445601 80e961 2c6a }
            // n = 7, score = 200
            //   33d2                 | xor                 edx, edx
            //   85ff                 | test                edi, edi
            //   7e25                 | jle                 0x27
            //   8a0c56               | mov                 cl, byte ptr [esi + edx*2]
            //   8a445601             | mov                 al, byte ptr [esi + edx*2 + 1]
            //   80e961               | sub                 cl, 0x61
            //   2c6a                 | sub                 al, 0x6a

        $sequence_3 = { e8???????? 8b06 0fb60c18 8d440101 }
            // n = 4, score = 200
            //   e8????????           |                     
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   0fb60c18             | movzx               ecx, byte ptr [eax + ebx]
            //   8d440101             | lea                 eax, [ecx + eax + 1]

        $sequence_4 = { 7418 4a 7552 8b55fc 69d28f201c01 bb8155bfb1 2bda }
            // n = 7, score = 200
            //   7418                 | je                  0x1a
            //   4a                   | dec                 edx
            //   7552                 | jne                 0x54
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   69d28f201c01         | imul                edx, edx, 0x11c208f
            //   bb8155bfb1           | mov                 ebx, 0xb1bf5581
            //   2bda                 | sub                 ebx, edx

        $sequence_5 = { 85c0 75cf 33c0 8d4de8 e8???????? }
            // n = 5, score = 200
            //   85c0                 | test                eax, eax
            //   75cf                 | jne                 0xffffffd1
            //   33c0                 | xor                 eax, eax
            //   8d4de8               | lea                 ecx, [ebp - 0x18]
            //   e8????????           |                     

        $sequence_6 = { 3916 7f58 83f801 7e53 }
            // n = 4, score = 200
            //   3916                 | cmp                 dword ptr [esi], edx
            //   7f58                 | jg                  0x5a
            //   83f801               | cmp                 eax, 1
            //   7e53                 | jle                 0x55

        $sequence_7 = { e8???????? 8b1d???????? 50 ffd3 6800010000 668945f0 }
            // n = 6, score = 200
            //   e8????????           |                     
            //   8b1d????????         |                     
            //   50                   | push                eax
            //   ffd3                 | call                ebx
            //   6800010000           | push                0x100
            //   668945f0             | mov                 word ptr [ebp - 0x10], ax

        $sequence_8 = { 50 47 e8???????? 85c0 75c3 }
            // n = 5, score = 200
            //   50                   | push                eax
            //   47                   | inc                 edi
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   75c3                 | jne                 0xffffffc5

        $sequence_9 = { 8d843500ffffff 50 e8???????? 8b450c 03fb }
            // n = 5, score = 200
            //   8d843500ffffff       | lea                 eax, [ebp + esi - 0x100]
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   03fb                 | add                 edi, ebx

    condition:
        7 of them and filesize < 188416
}