rule win_fickle_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.fickle."
        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.fickle"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { c7042400000000 e9???????? c7042400000000 c744240400000000 b800000000 e9???????? 89542418 }
            // n = 7, score = 100
            //   c7042400000000       | mov                 dword ptr [esp], 0
            //   e9????????           |                     
            //   c7042400000000       | mov                 dword ptr [esp], 0
            //   c744240400000000     | mov                 dword ptr [esp + 4], 0
            //   b800000000           | mov                 eax, 0
            //   e9????????           |                     
            //   89542418             | mov                 dword ptr [esp + 0x18], edx

        $sequence_1 = { d1c0 31d0 0fb7c0 01c8 c3 b87b8b0e06 29d0 }
            // n = 7, score = 100
            //   d1c0                 | rol                 eax, 1
            //   31d0                 | xor                 eax, edx
            //   0fb7c0               | movzx               eax, ax
            //   01c8                 | add                 eax, ecx
            //   c3                   | ret                 
            //   b87b8b0e06           | mov                 eax, 0x60e8b7b
            //   29d0                 | sub                 eax, edx

        $sequence_2 = { e8???????? 8b4704 8b4f08 8d9620010000 8902 894a04 895614 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8b4704               | mov                 eax, dword ptr [edi + 4]
            //   8b4f08               | mov                 ecx, dword ptr [edi + 8]
            //   8d9620010000         | lea                 edx, [esi + 0x120]
            //   8902                 | mov                 dword ptr [edx], eax
            //   894a04               | mov                 dword ptr [edx + 4], ecx
            //   895614               | mov                 dword ptr [esi + 0x14], edx

        $sequence_3 = { ff35???????? ff15???????? c683a201000000 80bba301000000 742e 8b8b74010000 8b9378010000 }
            // n = 7, score = 100
            //   ff35????????         |                     
            //   ff15????????         |                     
            //   c683a201000000       | mov                 byte ptr [ebx + 0x1a2], 0
            //   80bba301000000       | cmp                 byte ptr [ebx + 0x1a3], 0
            //   742e                 | je                  0x30
            //   8b8b74010000         | mov                 ecx, dword ptr [ebx + 0x174]
            //   8b9378010000         | mov                 edx, dword ptr [ebx + 0x178]

        $sequence_4 = { e8???????? 55 53 57 56 50 8b5c2418 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   55                   | push                ebp
            //   53                   | push                ebx
            //   57                   | push                edi
            //   56                   | push                esi
            //   50                   | push                eax
            //   8b5c2418             | mov                 ebx, dword ptr [esp + 0x18]

        $sequence_5 = { c7863801000002000000 8d8e90000000 89560c 57 e8???????? 83c404 c7863801000006000000 }
            // n = 7, score = 100
            //   c7863801000002000000     | mov    dword ptr [esi + 0x138], 2
            //   8d8e90000000         | lea                 ecx, [esi + 0x90]
            //   89560c               | mov                 dword ptr [esi + 0xc], edx
            //   57                   | push                edi
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   c7863801000006000000     | mov    dword ptr [esi + 0x138], 6

        $sequence_6 = { c744242830297f01 8974242c c744243030297f01 89542434 8d542424 8d74244c c7442438e03f7f01 }
            // n = 7, score = 100
            //   c744242830297f01     | mov                 dword ptr [esp + 0x28], 0x17f2930
            //   8974242c             | mov                 dword ptr [esp + 0x2c], esi
            //   c744243030297f01     | mov                 dword ptr [esp + 0x30], 0x17f2930
            //   89542434             | mov                 dword ptr [esp + 0x34], edx
            //   8d542424             | lea                 edx, [esp + 0x24]
            //   8d74244c             | lea                 esi, [esp + 0x4c]
            //   c7442438e03f7f01     | mov                 dword ptr [esp + 0x38], 0x17f3fe0

        $sequence_7 = { f7e1 891424 89442438 89f0 f7e1 89d1 030424 }
            // n = 7, score = 100
            //   f7e1                 | mul                 ecx
            //   891424               | mov                 dword ptr [esp], edx
            //   89442438             | mov                 dword ptr [esp + 0x38], eax
            //   89f0                 | mov                 eax, esi
            //   f7e1                 | mul                 ecx
            //   89d1                 | mov                 ecx, edx
            //   030424               | add                 eax, dword ptr [esp]

        $sequence_8 = { ff35???????? ff15???????? 837c241800 8db42400010000 7412 ff74241c 6a00 }
            // n = 7, score = 100
            //   ff35????????         |                     
            //   ff15????????         |                     
            //   837c241800           | cmp                 dword ptr [esp + 0x18], 0
            //   8db42400010000       | lea                 esi, [esp + 0x100]
            //   7412                 | je                  0x14
            //   ff74241c             | push                dword ptr [esp + 0x1c]
            //   6a00                 | push                0

        $sequence_9 = { e8???????? 85c0 7421 8b4c240c 8938 894804 89f1 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7421                 | je                  0x23
            //   8b4c240c             | mov                 ecx, dword ptr [esp + 0xc]
            //   8938                 | mov                 dword ptr [eax], edi
            //   894804               | mov                 dword ptr [eax + 4], ecx
            //   89f1                 | mov                 ecx, esi

    condition:
        7 of them and filesize < 1646592
}