rule win_cameleon_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.cameleon."
        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.cameleon"
        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 = { 8a8034c80410 8807 47 46 8bcb c6458301 e8???????? }
            // n = 7, score = 100
            //   8a8034c80410         | mov                 al, byte ptr [eax + 0x1004c834]
            //   8807                 | mov                 byte ptr [edi], al
            //   47                   | inc                 edi
            //   46                   | inc                 esi
            //   8bcb                 | mov                 ecx, ebx
            //   c6458301             | mov                 byte ptr [ebp - 0x7d], 1
            //   e8????????           |                     

        $sequence_1 = { c1e81f 03c2 3daaaaaa0a 765d e9???????? }
            // n = 5, score = 100
            //   c1e81f               | shr                 eax, 0x1f
            //   03c2                 | add                 eax, edx
            //   3daaaaaa0a           | cmp                 eax, 0xaaaaaaa
            //   765d                 | jbe                 0x5f
            //   e9????????           |                     

        $sequence_2 = { 7457 8b4df0 8b048d50d60510 f644382848 741c }
            // n = 5, score = 100
            //   7457                 | je                  0x59
            //   8b4df0               | mov                 ecx, dword ptr [ebp - 0x10]
            //   8b048d50d60510       | mov                 eax, dword ptr [ecx*4 + 0x1005d650]
            //   f644382848           | test                byte ptr [eax + edi + 0x28], 0x48
            //   741c                 | je                  0x1e

        $sequence_3 = { 0f8465010000 837dbc08 8d4510 8b4f04 8d75a8 0f4375a8 50 }
            // n = 7, score = 100
            //   0f8465010000         | je                  0x16b
            //   837dbc08             | cmp                 dword ptr [ebp - 0x44], 8
            //   8d4510               | lea                 eax, [ebp + 0x10]
            //   8b4f04               | mov                 ecx, dword ptr [edi + 4]
            //   8d75a8               | lea                 esi, [ebp - 0x58]
            //   0f4375a8             | cmovae              esi, dword ptr [ebp - 0x58]
            //   50                   | push                eax

        $sequence_4 = { 7341 57 56 8d4dd0 e8???????? }
            // n = 5, score = 100
            //   7341                 | jae                 0x43
            //   57                   | push                edi
            //   56                   | push                esi
            //   8d4dd0               | lea                 ecx, [ebp - 0x30]
            //   e8????????           |                     

        $sequence_5 = { 6bf830 8955fc 8b049550d60510 8945f8 807c382900 7507 }
            // n = 6, score = 100
            //   6bf830               | imul                edi, eax, 0x30
            //   8955fc               | mov                 dword ptr [ebp - 4], edx
            //   8b049550d60510       | mov                 eax, dword ptr [edx*4 + 0x1005d650]
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   807c382900           | cmp                 byte ptr [eax + edi + 0x29], 0
            //   7507                 | jne                 9

        $sequence_6 = { 0f84ad030000 83f826 7603 6a26 58 0fb60c85b6040510 0fb63485b7040510 }
            // n = 7, score = 100
            //   0f84ad030000         | je                  0x3b3
            //   83f826               | cmp                 eax, 0x26
            //   7603                 | jbe                 5
            //   6a26                 | push                0x26
            //   58                   | pop                 eax
            //   0fb60c85b6040510     | movzx               ecx, byte ptr [eax*4 + 0x100504b6]
            //   0fb63485b7040510     | movzx               esi, byte ptr [eax*4 + 0x100504b7]

        $sequence_7 = { 89443994 8b47a8 8b4004 c74438a8b44b0510 8b47a8 8b4804 8d41f8 }
            // n = 7, score = 100
            //   89443994             | mov                 dword ptr [ecx + edi - 0x6c], eax
            //   8b47a8               | mov                 eax, dword ptr [edi - 0x58]
            //   8b4004               | mov                 eax, dword ptr [eax + 4]
            //   c74438a8b44b0510     | mov                 dword ptr [eax + edi - 0x58], 0x10054bb4
            //   8b47a8               | mov                 eax, dword ptr [edi - 0x58]
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]
            //   8d41f8               | lea                 eax, [ecx - 8]

        $sequence_8 = { 50 6af6 ff15???????? 8b04bd50d60510 834c0318ff }
            // n = 5, score = 100
            //   50                   | push                eax
            //   6af6                 | push                -0xa
            //   ff15????????         |                     
            //   8b04bd50d60510       | mov                 eax, dword ptr [edi*4 + 0x1005d650]
            //   834c0318ff           | or                  dword ptr [ebx + eax + 0x18], 0xffffffff

        $sequence_9 = { 8bd4 8965ec c7421000000000 c7421400000000 c7421407000000 c7421000000000 837a1408 }
            // n = 7, score = 100
            //   8bd4                 | mov                 edx, esp
            //   8965ec               | mov                 dword ptr [ebp - 0x14], esp
            //   c7421000000000       | mov                 dword ptr [edx + 0x10], 0
            //   c7421400000000       | mov                 dword ptr [edx + 0x14], 0
            //   c7421407000000       | mov                 dword ptr [edx + 0x14], 7
            //   c7421000000000       | mov                 dword ptr [edx + 0x10], 0
            //   837a1408             | cmp                 dword ptr [edx + 0x14], 8

    condition:
        7 of them and filesize < 824320
}