rule win_spyeye_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.spyeye."
        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.spyeye"
        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 = { ffd0 8b65fc c9 c21c00 55 }
            // n = 5, score = 700
            //   ffd0                 | call                eax
            //   8b65fc               | mov                 esp, dword ptr [ebp - 4]
            //   c9                   | leave               
            //   c21c00               | ret                 0x1c
            //   55                   | push                ebp

        $sequence_1 = { 8b5d14 33f6 3bde 7f12 81fbffffff7f }
            // n = 5, score = 700
            //   8b5d14               | mov                 ebx, dword ptr [ebp + 0x14]
            //   33f6                 | xor                 esi, esi
            //   3bde                 | cmp                 ebx, esi
            //   7f12                 | jg                  0x14
            //   81fbffffff7f         | cmp                 ebx, 0x7fffffff

        $sequence_2 = { 56 6880000000 6a04 56 6a07 6800000040 }
            // n = 6, score = 700
            //   56                   | push                esi
            //   6880000000           | push                0x80
            //   6a04                 | push                4
            //   56                   | push                esi
            //   6a07                 | push                7
            //   6800000040           | push                0x40000000

        $sequence_3 = { 3bdf 740b 83fbff 7406 53 e8???????? }
            // n = 6, score = 700
            //   3bdf                 | cmp                 ebx, edi
            //   740b                 | je                  0xd
            //   83fbff               | cmp                 ebx, -1
            //   7406                 | je                  8
            //   53                   | push                ebx
            //   e8????????           |                     

        $sequence_4 = { c20800 55 8bec 51 683ae048ef }
            // n = 5, score = 700
            //   c20800               | ret                 8
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   51                   | push                ecx
            //   683ae048ef           | push                0xef48e03a

        $sequence_5 = { 57 e8???????? 83f8ff 740a 83e0fe 50 }
            // n = 6, score = 700
            //   57                   | push                edi
            //   e8????????           |                     
            //   83f8ff               | cmp                 eax, -1
            //   740a                 | je                  0xc
            //   83e0fe               | and                 eax, 0xfffffffe
            //   50                   | push                eax

        $sequence_6 = { 83f8ff 740a 83e0fe 50 57 }
            // n = 5, score = 700
            //   83f8ff               | cmp                 eax, -1
            //   740a                 | je                  0xc
            //   83e0fe               | and                 eax, 0xfffffffe
            //   50                   | push                eax
            //   57                   | push                edi

        $sequence_7 = { 3bdf 740b 83fbff 7406 53 e8???????? 8b45f8 }
            // n = 7, score = 700
            //   3bdf                 | cmp                 ebx, edi
            //   740b                 | je                  0xd
            //   83fbff               | cmp                 ebx, -1
            //   7406                 | je                  8
            //   53                   | push                ebx
            //   e8????????           |                     
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]

        $sequence_8 = { 57 6a01 be00000040 56 ff750c e8???????? }
            // n = 6, score = 700
            //   57                   | push                edi
            //   6a01                 | push                1
            //   be00000040           | mov                 esi, 0x40000000
            //   56                   | push                esi
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   e8????????           |                     

        $sequence_9 = { 751b 57 6800000002 6a03 57 6a01 }
            // n = 6, score = 700
            //   751b                 | jne                 0x1d
            //   57                   | push                edi
            //   6800000002           | push                0x2000000
            //   6a03                 | push                3
            //   57                   | push                edi
            //   6a01                 | push                1

    condition:
        7 of them and filesize < 741376
}