rule win_odinaff_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.odinaff."
        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.odinaff"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 0fb69238474000 321437 46 ff4dfc 8856ff 75a8 }
            // n = 6, score = 200
            //   0fb69238474000       | movzx               edx, byte ptr [edx + 0x404738]
            //   321437               | xor                 dl, byte ptr [edi + esi]
            //   46                   | inc                 esi
            //   ff4dfc               | dec                 dword ptr [ebp - 4]
            //   8856ff               | mov                 byte ptr [esi - 1], dl
            //   75a8                 | jne                 0xffffffaa

        $sequence_1 = { 56 6804010000 8bd8 ff15???????? 53 }
            // n = 5, score = 200
            //   56                   | push                esi
            //   6804010000           | push                0x104
            //   8bd8                 | mov                 ebx, eax
            //   ff15????????         |                     
            //   53                   | push                ebx

        $sequence_2 = { 6804020000 8d85f8fdffff 6a00 50 c785f4fdffff00000000 }
            // n = 5, score = 200
            //   6804020000           | push                0x204
            //   8d85f8fdffff         | lea                 eax, [ebp - 0x208]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   c785f4fdffff00000000     | mov    dword ptr [ebp - 0x20c], 0

        $sequence_3 = { 56 57 8b3d???????? 6800080000 6a08 c745f000080000 }
            // n = 6, score = 200
            //   56                   | push                esi
            //   57                   | push                edi
            //   8b3d????????         |                     
            //   6800080000           | push                0x800
            //   6a08                 | push                8
            //   c745f000080000       | mov                 dword ptr [ebp - 0x10], 0x800

        $sequence_4 = { 50 ffd6 8945f4 8b45f0 }
            // n = 4, score = 200
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]

        $sequence_5 = { 50 ff15???????? 8b4d0c 6a00 6880000000 6a02 }
            // n = 6, score = 200
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   6a00                 | push                0
            //   6880000000           | push                0x80
            //   6a02                 | push                2

        $sequence_6 = { ff15???????? 8d4e04 8bd8 51 }
            // n = 4, score = 200
            //   ff15????????         |                     
            //   8d4e04               | lea                 ecx, [esi + 4]
            //   8bd8                 | mov                 ebx, eax
            //   51                   | push                ecx

        $sequence_7 = { 6800080000 03d7 52 56 ff15???????? }
            // n = 5, score = 200
            //   6800080000           | push                0x800
            //   03d7                 | add                 edx, edi
            //   52                   | push                edx
            //   56                   | push                esi
            //   ff15????????         |                     

        $sequence_8 = { 25ff000000 8a9838474000 889038474000 889938474000 0fb69038474000 0fb6db 03d3 }
            // n = 7, score = 200
            //   25ff000000           | and                 eax, 0xff
            //   8a9838474000         | mov                 bl, byte ptr [eax + 0x404738]
            //   889038474000         | mov                 byte ptr [eax + 0x404738], dl
            //   889938474000         | mov                 byte ptr [ecx + 0x404738], bl
            //   0fb69038474000       | movzx               edx, byte ptr [eax + 0x404738]
            //   0fb6db               | movzx               ebx, bl
            //   03d3                 | add                 edx, ebx

        $sequence_9 = { e9???????? 8b4db0 8b55a8 6a00 6a00 }
            // n = 5, score = 200
            //   e9????????           |                     
            //   8b4db0               | mov                 ecx, dword ptr [ebp - 0x50]
            //   8b55a8               | mov                 edx, dword ptr [ebp - 0x58]
            //   6a00                 | push                0
            //   6a00                 | push                0

    condition:
        7 of them and filesize < 73728
}