rule win_odinaff_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        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 = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { 8b35???????? 50 ffd6 6800900100 8bd8 6a08 895df8 }
            // n = 7, score = 200
            //   8b35????????         |                     
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   6800900100           | push                0x19000
            //   8bd8                 | mov                 ebx, eax
            //   6a08                 | push                8
            //   895df8               | mov                 dword ptr [ebp - 8], ebx

        $sequence_1 = { ff15???????? 6808020000 6a08 ffd6 50 ffd3 }
            // n = 6, score = 200
            //   ff15????????         |                     
            //   6808020000           | push                0x208
            //   6a08                 | push                8
            //   ffd6                 | call                esi
            //   50                   | push                eax
            //   ffd3                 | call                ebx

        $sequence_2 = { 8b85d0feffff 51 8b8dccfeffff 52 8b55f8 50 8b45f4 }
            // n = 7, score = 200
            //   8b85d0feffff         | mov                 eax, dword ptr [ebp - 0x130]
            //   51                   | push                ecx
            //   8b8dccfeffff         | mov                 ecx, dword ptr [ebp - 0x134]
            //   52                   | push                edx
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   50                   | push                eax
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]

        $sequence_3 = { 8d45ec 50 6a1f 56 ff15???????? 8b4d10 }
            // n = 6, score = 200
            //   8d45ec               | lea                 eax, [ebp - 0x14]
            //   50                   | push                eax
            //   6a1f                 | push                0x1f
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]

        $sequence_4 = { 8b5df4 68???????? 53 c7458044000000 }
            // n = 4, score = 200
            //   8b5df4               | mov                 ebx, dword ptr [ebp - 0xc]
            //   68????????           |                     
            //   53                   | push                ebx
            //   c7458044000000       | mov                 dword ptr [ebp - 0x80], 0x44

        $sequence_5 = { ffd6 85c0 7409 8d95c8feffff }
            // n = 4, score = 200
            //   ffd6                 | call                esi
            //   85c0                 | test                eax, eax
            //   7409                 | je                  0xb
            //   8d95c8feffff         | lea                 edx, [ebp - 0x138]

        $sequence_6 = { 7409 50 ff15???????? eb0d ff15???????? 3d1f040000 7507 }
            // n = 7, score = 200
            //   7409                 | je                  0xb
            //   50                   | push                eax
            //   ff15????????         |                     
            //   eb0d                 | jmp                 0xf
            //   ff15????????         |                     
            //   3d1f040000           | cmp                 eax, 0x41f
            //   7507                 | jne                 9

        $sequence_7 = { 33c0 6a3c 50 8945f8 8945fc 8d4598 50 }
            // n = 7, score = 200
            //   33c0                 | xor                 eax, eax
            //   6a3c                 | push                0x3c
            //   50                   | push                eax
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8d4598               | lea                 eax, [ebp - 0x68]
            //   50                   | push                eax

        $sequence_8 = { e8???????? 50 53 68???????? 68???????? ff15???????? }
            // n = 6, score = 200
            //   e8????????           |                     
            //   50                   | push                eax
            //   53                   | push                ebx
            //   68????????           |                     
            //   68????????           |                     
            //   ff15????????         |                     

        $sequence_9 = { 6a00 ffd7 50 ffd6 ff15???????? }
            // n = 5, score = 200
            //   6a00                 | push                0
            //   ffd7                 | call                edi
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 73728
}