rule win_ehdevel_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.ehdevel."
        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.ehdevel"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 897e14 c645fc03 399d94f7ffff 720f 8b9580f7ffff }
            // n = 5, score = 100
            //   897e14               | mov                 dword ptr [esi + 0x14], edi
            //   c645fc03             | mov                 byte ptr [ebp - 4], 3
            //   399d94f7ffff         | cmp                 dword ptr [ebp - 0x86c], ebx
            //   720f                 | jb                  0x11
            //   8b9580f7ffff         | mov                 edx, dword ptr [ebp - 0x880]

        $sequence_1 = { 3bc6 0f84effeffff 6a07 59 3bc1 0f87c8090000 ff24853ad50110 }
            // n = 7, score = 100
            //   3bc6                 | cmp                 eax, esi
            //   0f84effeffff         | je                  0xfffffef5
            //   6a07                 | push                7
            //   59                   | pop                 ecx
            //   3bc1                 | cmp                 eax, ecx
            //   0f87c8090000         | ja                  0x9ce
            //   ff24853ad50110       | jmp                 dword ptr [eax*4 + 0x1001d53a]

        $sequence_2 = { 68???????? 8d85e8fbffff 6804010000 50 e8???????? 83c40c 57 }
            // n = 7, score = 100
            //   68????????           |                     
            //   8d85e8fbffff         | lea                 eax, [ebp - 0x418]
            //   6804010000           | push                0x104
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   57                   | push                edi

        $sequence_3 = { 6800040000 8d8c2420040000 51 eb26 68???????? 6800040000 8d942420040000 }
            // n = 7, score = 100
            //   6800040000           | push                0x400
            //   8d8c2420040000       | lea                 ecx, [esp + 0x420]
            //   51                   | push                ecx
            //   eb26                 | jmp                 0x28
            //   68????????           |                     
            //   6800040000           | push                0x400
            //   8d942420040000       | lea                 edx, [esp + 0x420]

        $sequence_4 = { 85f6 0f84c5000000 6a00 6a50 8d8df8f7ffff 51 }
            // n = 6, score = 100
            //   85f6                 | test                esi, esi
            //   0f84c5000000         | je                  0xcb
            //   6a00                 | push                0
            //   6a50                 | push                0x50
            //   8d8df8f7ffff         | lea                 ecx, [ebp - 0x808]
            //   51                   | push                ecx

        $sequence_5 = { 8b06 8bd0 83e01f c1fa05 8b1495a0ae0310 c1e006 }
            // n = 6, score = 100
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   8bd0                 | mov                 edx, eax
            //   83e01f               | and                 eax, 0x1f
            //   c1fa05               | sar                 edx, 5
            //   8b1495a0ae0310       | mov                 edx, dword ptr [edx*4 + 0x1003aea0]
            //   c1e006               | shl                 eax, 6

        $sequence_6 = { 33d2 8955fc 3bca 7458 33f6 52 c7411407000000 }
            // n = 7, score = 100
            //   33d2                 | xor                 edx, edx
            //   8955fc               | mov                 dword ptr [ebp - 4], edx
            //   3bca                 | cmp                 ecx, edx
            //   7458                 | je                  0x5a
            //   33f6                 | xor                 esi, esi
            //   52                   | push                edx
            //   c7411407000000       | mov                 dword ptr [ecx + 0x14], 7

        $sequence_7 = { 57 e8???????? 83c404 68???????? e8???????? 83c404 }
            // n = 6, score = 100
            //   57                   | push                edi
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   68????????           |                     
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

        $sequence_8 = { 8d8424a8090000 50 ff15???????? 85c0 742d 43 }
            // n = 6, score = 100
            //   8d8424a8090000       | lea                 eax, [esp + 0x9a8]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   742d                 | je                  0x2f
            //   43                   | inc                 ebx

        $sequence_9 = { 8d8424c4010000 6800040000 50 e8???????? 83c424 }
            // n = 5, score = 100
            //   8d8424c4010000       | lea                 eax, [esp + 0x1c4]
            //   6800040000           | push                0x400
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c424               | add                 esp, 0x24

    condition:
        7 of them and filesize < 524288
}