rule win_sidewinder_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.sidewinder."
        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.sidewinder"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { ff751c 8b45d8 8b00 ff75d8 ff5020 dbe2 8945d4 }
            // n = 7, score = 200
            //   ff751c               | push                dword ptr [ebp + 0x1c]
            //   8b45d8               | mov                 eax, dword ptr [ebp - 0x28]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   ff75d8               | push                dword ptr [ebp - 0x28]
            //   ff5020               | call                dword ptr [eax + 0x20]
            //   dbe2                 | fnclex              
            //   8945d4               | mov                 dword ptr [ebp - 0x2c], eax

        $sequence_1 = { 68???????? ff75c4 ff75c0 e8???????? 89856cffffff eb07 83a56cffffff00 }
            // n = 7, score = 200
            //   68????????           |                     
            //   ff75c4               | push                dword ptr [ebp - 0x3c]
            //   ff75c0               | push                dword ptr [ebp - 0x40]
            //   e8????????           |                     
            //   89856cffffff         | mov                 dword ptr [ebp - 0x94], eax
            //   eb07                 | jmp                 9
            //   83a56cffffff00       | and                 dword ptr [ebp - 0x94], 0

        $sequence_2 = { e8???????? c745fc0b000000 8d4598 50 e8???????? e8???????? c745fc0c000000 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   c745fc0b000000       | mov                 dword ptr [ebp - 4], 0xb
            //   8d4598               | lea                 eax, [ebp - 0x68]
            //   50                   | push                eax
            //   e8????????           |                     
            //   e8????????           |                     
            //   c745fc0c000000       | mov                 dword ptr [ebp - 4], 0xc

        $sequence_3 = { ff7598 e8???????? 898574ffffff eb07 83a574ffffff00 8d4dd0 e8???????? }
            // n = 7, score = 200
            //   ff7598               | push                dword ptr [ebp - 0x68]
            //   e8????????           |                     
            //   898574ffffff         | mov                 dword ptr [ebp - 0x8c], eax
            //   eb07                 | jmp                 9
            //   83a574ffffff00       | and                 dword ptr [ebp - 0x8c], 0
            //   8d4dd0               | lea                 ecx, [ebp - 0x30]
            //   e8????????           |                     

        $sequence_4 = { c745fc03000000 6a00 6a1f 6a01 6a11 8d45bc 50 }
            // n = 7, score = 200
            //   c745fc03000000       | mov                 dword ptr [ebp - 4], 3
            //   6a00                 | push                0
            //   6a1f                 | push                0x1f
            //   6a01                 | push                1
            //   6a11                 | push                0x11
            //   8d45bc               | lea                 eax, [ebp - 0x44]
            //   50                   | push                eax

        $sequence_5 = { 03c8 0f8097010000 81e1ff000000 8b4508 894874 8b4508 8b4070 }
            // n = 7, score = 200
            //   03c8                 | add                 ecx, eax
            //   0f8097010000         | jo                  0x19d
            //   81e1ff000000         | and                 ecx, 0xff
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   894874               | mov                 dword ptr [eax + 0x74], ecx
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8b4070               | mov                 eax, dword ptr [eax + 0x70]

        $sequence_6 = { 837db800 0f8e25010000 8d45b8 50 8d45e0 50 8b45e8 }
            // n = 7, score = 200
            //   837db800             | cmp                 dword ptr [ebp - 0x48], 0
            //   0f8e25010000         | jle                 0x12b
            //   8d45b8               | lea                 eax, [ebp - 0x48]
            //   50                   | push                eax
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   50                   | push                eax
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]

        $sequence_7 = { 68???????? ff75d8 ff75d4 e8???????? 8945a8 eb04 }
            // n = 6, score = 200
            //   68????????           |                     
            //   ff75d8               | push                dword ptr [ebp - 0x28]
            //   ff75d4               | push                dword ptr [ebp - 0x2c]
            //   e8????????           |                     
            //   8945a8               | mov                 dword ptr [ebp - 0x58], eax
            //   eb04                 | jmp                 6

        $sequence_8 = { 6a44 68???????? ffb53cffffff ffb538ffffff e8???????? 898580fdffff eb07 }
            // n = 7, score = 200
            //   6a44                 | push                0x44
            //   68????????           |                     
            //   ffb53cffffff         | push                dword ptr [ebp - 0xc4]
            //   ffb538ffffff         | push                dword ptr [ebp - 0xc8]
            //   e8????????           |                     
            //   898580fdffff         | mov                 dword ptr [ebp - 0x280], eax
            //   eb07                 | jmp                 9

        $sequence_9 = { ff751c 8b8518ffffff 8b00 ffb518ffffff ff5024 dbe2 898514ffffff }
            // n = 7, score = 200
            //   ff751c               | push                dword ptr [ebp + 0x1c]
            //   8b8518ffffff         | mov                 eax, dword ptr [ebp - 0xe8]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   ffb518ffffff         | push                dword ptr [ebp - 0xe8]
            //   ff5024               | call                dword ptr [eax + 0x24]
            //   dbe2                 | fnclex              
            //   898514ffffff         | mov                 dword ptr [ebp - 0xec], eax

    condition:
        7 of them and filesize < 679936
}