rule win_lyposit_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.lyposit."
        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.lyposit"
        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 = { 50 e8???????? 59 8bd8 eb02 33db 8d45e4 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8bd8                 | mov                 ebx, eax
            //   eb02                 | jmp                 4
            //   33db                 | xor                 ebx, ebx
            //   8d45e4               | lea                 eax, [ebp - 0x1c]

        $sequence_1 = { ebaf 8b0e 3b4110 7d0d }
            // n = 4, score = 200
            //   ebaf                 | jmp                 0xffffffb1
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   3b4110               | cmp                 eax, dword ptr [ecx + 0x10]
            //   7d0d                 | jge                 0xf

        $sequence_2 = { c645e702 8d7e01 897dd8 c645e300 32d2 8855e2 }
            // n = 6, score = 200
            //   c645e702             | mov                 byte ptr [ebp - 0x19], 2
            //   8d7e01               | lea                 edi, [esi + 1]
            //   897dd8               | mov                 dword ptr [ebp - 0x28], edi
            //   c645e300             | mov                 byte ptr [ebp - 0x1d], 0
            //   32d2                 | xor                 dl, dl
            //   8855e2               | mov                 byte ptr [ebp - 0x1e], dl

        $sequence_3 = { e8???????? 59 8945c8 b9???????? e8???????? 50 e8???????? }
            // n = 7, score = 200
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8945c8               | mov                 dword ptr [ebp - 0x38], eax
            //   b9????????           |                     
            //   e8????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_4 = { 53 57 53 53 6a64 6a64 }
            // n = 6, score = 200
            //   53                   | push                ebx
            //   57                   | push                edi
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   6a64                 | push                0x64
            //   6a64                 | push                0x64

        $sequence_5 = { c3 33c0 c3 8b4c2408 8b442404 85c9 7403 }
            // n = 7, score = 200
            //   c3                   | ret                 
            //   33c0                 | xor                 eax, eax
            //   c3                   | ret                 
            //   8b4c2408             | mov                 ecx, dword ptr [esp + 8]
            //   8b442404             | mov                 eax, dword ptr [esp + 4]
            //   85c9                 | test                ecx, ecx
            //   7403                 | je                  5

        $sequence_6 = { 895de4 895dfc 395d0c 750b 834dfcff 33c0 }
            // n = 6, score = 200
            //   895de4               | mov                 dword ptr [ebp - 0x1c], ebx
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   395d0c               | cmp                 dword ptr [ebp + 0xc], ebx
            //   750b                 | jne                 0xd
            //   834dfcff             | or                  dword ptr [ebp - 4], 0xffffffff
            //   33c0                 | xor                 eax, eax

        $sequence_7 = { 6a14 68???????? e8???????? 33f6 8975dc 8975e4 8975fc }
            // n = 7, score = 200
            //   6a14                 | push                0x14
            //   68????????           |                     
            //   e8????????           |                     
            //   33f6                 | xor                 esi, esi
            //   8975dc               | mov                 dword ptr [ebp - 0x24], esi
            //   8975e4               | mov                 dword ptr [ebp - 0x1c], esi
            //   8975fc               | mov                 dword ptr [ebp - 4], esi

        $sequence_8 = { 395d0c 750b 834dfcff 33c0 e9???????? 391d???????? }
            // n = 6, score = 200
            //   395d0c               | cmp                 dword ptr [ebp + 0xc], ebx
            //   750b                 | jne                 0xd
            //   834dfcff             | or                  dword ptr [ebp - 4], 0xffffffff
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     
            //   391d????????         |                     

        $sequence_9 = { 8bfe e8???????? 33c0 eb0f 6a08 6a40 ffd3 }
            // n = 7, score = 200
            //   8bfe                 | mov                 edi, esi
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax
            //   eb0f                 | jmp                 0x11
            //   6a08                 | push                8
            //   6a40                 | push                0x40
            //   ffd3                 | call                ebx

    condition:
        7 of them and filesize < 466944
}