rule win_alureon_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.alureon."
        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.alureon"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 8b4dfc 8b07 8d440802 50 ff75f0 }
            // n = 5, score = 200
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   8d440802             | lea                 eax, [eax + ecx + 2]
            //   50                   | push                eax
            //   ff75f0               | push                dword ptr [ebp - 0x10]

        $sequence_1 = { 6a60 32c0 59 6a2c }
            // n = 4, score = 200
            //   6a60                 | push                0x60
            //   32c0                 | xor                 al, al
            //   59                   | pop                 ecx
            //   6a2c                 | push                0x2c

        $sequence_2 = { 8b5710 49 03d3 4c 3912 }
            // n = 5, score = 200
            //   8b5710               | mov                 edx, dword ptr [edi + 0x10]
            //   49                   | dec                 ecx
            //   03d3                 | add                 edx, ebx
            //   4c                   | dec                 esp
            //   3912                 | cmp                 dword ptr [edx], edx

        $sequence_3 = { 0fb603 0fb65301 23c6 c1e004 c1ea04 0bc2 8a4405bc }
            // n = 7, score = 200
            //   0fb603               | movzx               eax, byte ptr [ebx]
            //   0fb65301             | movzx               edx, byte ptr [ebx + 1]
            //   23c6                 | and                 eax, esi
            //   c1e004               | shl                 eax, 4
            //   c1ea04               | shr                 edx, 4
            //   0bc2                 | or                  eax, edx
            //   8a4405bc             | mov                 al, byte ptr [ebp + eax - 0x44]

        $sequence_4 = { 8b48fc 83c028 f3a4 8b78f8 0fb74b06 03fa ff45f8 }
            // n = 7, score = 200
            //   8b48fc               | mov                 ecx, dword ptr [eax - 4]
            //   83c028               | add                 eax, 0x28
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   8b78f8               | mov                 edi, dword ptr [eax - 8]
            //   0fb74b06             | movzx               ecx, word ptr [ebx + 6]
            //   03fa                 | add                 edi, edx
            //   ff45f8               | inc                 dword ptr [ebp - 8]

        $sequence_5 = { 756d 33f6 56 8d45f0 }
            // n = 4, score = 200
            //   756d                 | jne                 0x6f
            //   33f6                 | xor                 esi, esi
            //   56                   | push                esi
            //   8d45f0               | lea                 eax, [ebp - 0x10]

        $sequence_6 = { 83c228 48 03f5 41 ffc0 f3a4 }
            // n = 6, score = 200
            //   83c228               | add                 edx, 0x28
            //   48                   | dec                 eax
            //   03f5                 | add                 esi, ebp
            //   41                   | inc                 ecx
            //   ffc0                 | inc                 eax
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]

        $sequence_7 = { 03d3 48 8bce 48 }
            // n = 4, score = 200
            //   03d3                 | add                 edx, ebx
            //   48                   | dec                 eax
            //   8bce                 | mov                 ecx, esi
            //   48                   | dec                 eax

        $sequence_8 = { 83c424 68???????? 68???????? 885dff ff15???????? 50 ff15???????? }
            // n = 7, score = 100
            //   83c424               | add                 esp, 0x24
            //   68????????           |                     
            //   68????????           |                     
            //   885dff               | mov                 byte ptr [ebp - 1], bl
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_9 = { ff742408 ff30 e8???????? 85c0 59 59 }
            // n = 6, score = 100
            //   ff742408             | push                dword ptr [esp + 8]
            //   ff30                 | push                dword ptr [eax]
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx

        $sequence_10 = { ff7028 8bf0 e8???????? 59 50 ff742418 }
            // n = 6, score = 100
            //   ff7028               | push                dword ptr [eax + 0x28]
            //   8bf0                 | mov                 esi, eax
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   50                   | push                eax
            //   ff742418             | push                dword ptr [esp + 0x18]

        $sequence_11 = { 8b35???????? 51 bfff010000 03c3 }
            // n = 4, score = 100
            //   8b35????????         |                     
            //   51                   | push                ecx
            //   bfff010000           | mov                 edi, 0x1ff
            //   03c3                 | add                 eax, ebx

        $sequence_12 = { 53 8d442418 50 6a15 }
            // n = 4, score = 100
            //   53                   | push                ebx
            //   8d442418             | lea                 eax, [esp + 0x18]
            //   50                   | push                eax
            //   6a15                 | push                0x15

        $sequence_13 = { ff15???????? 385dff 0f85d3000000 8d45e8 50 683f000f00 53 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   385dff               | cmp                 byte ptr [ebp - 1], bl
            //   0f85d3000000         | jne                 0xd9
            //   8d45e8               | lea                 eax, [ebp - 0x18]
            //   50                   | push                eax
            //   683f000f00           | push                0xf003f
            //   53                   | push                ebx

        $sequence_14 = { 50 53 68???????? 8d8424ec000000 50 ff15???????? }
            // n = 6, score = 100
            //   50                   | push                eax
            //   53                   | push                ebx
            //   68????????           |                     
            //   8d8424ec000000       | lea                 eax, [esp + 0xec]
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_15 = { 68???????? 8d842400040000 56 50 ff15???????? 68b6100000 }
            // n = 6, score = 100
            //   68????????           |                     
            //   8d842400040000       | lea                 eax, [esp + 0x400]
            //   56                   | push                esi
            //   50                   | push                eax
            //   ff15????????         |                     
            //   68b6100000           | push                0x10b6

    condition:
        7 of them and filesize < 278528
}