rule win_odinaff_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        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 = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 7410 50 6a00 ffd6 8b3d???????? 50 }
            // n = 6, score = 200
            //   7410                 | je                  0x12
            //   50                   | push                eax
            //   6a00                 | push                0
            //   ffd6                 | call                esi
            //   8b3d????????         |                     
            //   50                   | push                eax

        $sequence_1 = { 681c010000 8d8dc8feffff 6a00 51 }
            // n = 4, score = 200
            //   681c010000           | push                0x11c
            //   8d8dc8feffff         | lea                 ecx, dword ptr [ebp - 0x138]
            //   6a00                 | push                0
            //   51                   | push                ecx

        $sequence_2 = { 50 8b45f4 51 52 50 68???????? }
            // n = 6, score = 200
            //   50                   | push                eax
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   51                   | push                ecx
            //   52                   | push                edx
            //   50                   | push                eax
            //   68????????           |                     

        $sequence_3 = { 668910 8b55f4 8d4df0 51 }
            // n = 4, score = 200
            //   668910               | mov                 word ptr [eax], dx
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   8d4df0               | lea                 ecx, dword ptr [ebp - 0x10]
            //   51                   | push                ecx

        $sequence_4 = { 833d????????00 741a 833d????????00 7411 833d????????00 7408 }
            // n = 6, score = 200
            //   833d????????00       |                     
            //   741a                 | je                  0x1c
            //   833d????????00       |                     
            //   7411                 | je                  0x13
            //   833d????????00       |                     
            //   7408                 | je                  0xa

        $sequence_5 = { 8b5510 8b45f0 6a00 8d4de0 }
            // n = 4, score = 200
            //   8b5510               | mov                 edx, dword ptr [ebp + 0x10]
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]
            //   6a00                 | push                0
            //   8d4de0               | lea                 ecx, dword ptr [ebp - 0x20]

        $sequence_6 = { 0305???????? 53 25ff000000 8a9838474000 890d???????? 889038474000 889938474000 }
            // n = 7, score = 200
            //   0305????????         |                     
            //   53                   | push                ebx
            //   25ff000000           | and                 eax, 0xff
            //   8a9838474000         | mov                 bl, byte ptr [eax + 0x404738]
            //   890d????????         |                     
            //   889038474000         | mov                 byte ptr [eax + 0x404738], dl
            //   889938474000         | mov                 byte ptr [ecx + 0x404738], bl

        $sequence_7 = { 8b559c 68???????? 52 ff15???????? }
            // n = 4, score = 200
            //   8b559c               | mov                 edx, dword ptr [ebp - 0x64]
            //   68????????           |                     
            //   52                   | push                edx
            //   ff15????????         |                     

        $sequence_8 = { 33c0 5b 8be5 5d c3 0fb706 83e831 }
            // n = 7, score = 200
            //   33c0                 | xor                 eax, eax
            //   5b                   | pop                 ebx
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   0fb706               | movzx               eax, word ptr [esi]
            //   83e831               | sub                 eax, 0x31

        $sequence_9 = { 6a08 ffd7 50 ffd6 6800080000 }
            // n = 5, score = 200
            //   6a08                 | push                8
            //   ffd7                 | call                edi
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   6800080000           | push                0x800

    condition:
        7 of them and filesize < 73728
}