rule win_scieron_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.scieron."
        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.scieron"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { 5f c9 c3 55 8bec 81ec68060000 }
            // n = 6, score = 100
            //   5f                   | pop                 edi
            //   c9                   | leave               
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   81ec68060000         | sub                 esp, 0x668

        $sequence_1 = { 8b35???????? ffd6 ff75f0 ffd6 33c0 eb06 ff15???????? }
            // n = 7, score = 100
            //   8b35????????         |                     
            //   ffd6                 | call                esi
            //   ff75f0               | push                dword ptr [ebp - 0x10]
            //   ffd6                 | call                esi
            //   33c0                 | xor                 eax, eax
            //   eb06                 | jmp                 8
            //   ff15????????         |                     

        $sequence_2 = { 8974242c 8944241c ff15???????? 85c0 }
            // n = 4, score = 100
            //   8974242c             | mov                 dword ptr [esp + 0x2c], esi
            //   8944241c             | mov                 dword ptr [esp + 0x1c], eax
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

        $sequence_3 = { 50 8d45f8 50 8d45f7 50 8d45fc 8bce }
            // n = 7, score = 100
            //   50                   | push                eax
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   50                   | push                eax
            //   8d45f7               | lea                 eax, [ebp - 9]
            //   50                   | push                eax
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   8bce                 | mov                 ecx, esi

        $sequence_4 = { c3 8b44240c 668b08 40 40 6685c9 75f6 }
            // n = 7, score = 100
            //   c3                   | ret                 
            //   8b44240c             | mov                 eax, dword ptr [esp + 0xc]
            //   668b08               | mov                 cx, word ptr [eax]
            //   40                   | inc                 eax
            //   40                   | inc                 eax
            //   6685c9               | test                cx, cx
            //   75f6                 | jne                 0xfffffff8

        $sequence_5 = { 6bf61c 8b88c0410010 ff742414 898e08400010 8b88dc410010 898e00400010 }
            // n = 6, score = 100
            //   6bf61c               | imul                esi, esi, 0x1c
            //   8b88c0410010         | mov                 ecx, dword ptr [eax + 0x100041c0]
            //   ff742414             | push                dword ptr [esp + 0x14]
            //   898e08400010         | mov                 dword ptr [esi + 0x10004008], ecx
            //   8b88dc410010         | mov                 ecx, dword ptr [eax + 0x100041dc]
            //   898e00400010         | mov                 dword ptr [esi + 0x10004000], ecx

        $sequence_6 = { 50 68???????? ffb618020000 68???????? 55 ffd3 50 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   68????????           |                     
            //   ffb618020000         | push                dword ptr [esi + 0x218]
            //   68????????           |                     
            //   55                   | push                ebp
            //   ffd3                 | call                ebx
            //   50                   | push                eax

        $sequence_7 = { ff15???????? 8b3d???????? 8b75e8 bb24020000 }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   8b3d????????         |                     
            //   8b75e8               | mov                 esi, dword ptr [ebp - 0x18]
            //   bb24020000           | mov                 ebx, 0x224

        $sequence_8 = { ffd7 ffd0 83a61c02000000 83be1c02000000 0f8556010000 ffb610020000 8d84249c000000 }
            // n = 7, score = 100
            //   ffd7                 | call                edi
            //   ffd0                 | call                eax
            //   83a61c02000000       | and                 dword ptr [esi + 0x21c], 0
            //   83be1c02000000       | cmp                 dword ptr [esi + 0x21c], 0
            //   0f8556010000         | jne                 0x15c
            //   ffb610020000         | push                dword ptr [esi + 0x210]
            //   8d84249c000000       | lea                 eax, [esp + 0x9c]

        $sequence_9 = { 8bec 56 8d470c 50 6a40 }
            // n = 5, score = 100
            //   8bec                 | mov                 ebp, esp
            //   56                   | push                esi
            //   8d470c               | lea                 eax, [edi + 0xc]
            //   50                   | push                eax
            //   6a40                 | push                0x40

    condition:
        7 of them and filesize < 100352
}