rule win_taintedscribe_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.taintedscribe."
        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.taintedscribe"
        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 = { c785a0fbffff01000000 53 eb61 e8???????? 33c9 668908 83c002 }
            // n = 7, score = 500
            //   c785a0fbffff01000000     | mov    dword ptr [ebp - 0x460], 1
            //   53                   | push                ebx
            //   eb61                 | jmp                 0x63
            //   e8????????           |                     
            //   33c9                 | xor                 ecx, ecx
            //   668908               | mov                 word ptr [eax], cx
            //   83c002               | add                 eax, 2

        $sequence_1 = { 5e 8be5 5d c20800 c7460c00000001 }
            // n = 5, score = 500
            //   5e                   | pop                 esi
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c20800               | ret                 8
            //   c7460c00000001       | mov                 dword ptr [esi + 0xc], 0x1000000

        $sequence_2 = { 33c0 56 8bf1 8b4d0c 89465c 895664 }
            // n = 6, score = 500
            //   33c0                 | xor                 eax, eax
            //   56                   | push                esi
            //   8bf1                 | mov                 esi, ecx
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   89465c               | mov                 dword ptr [esi + 0x5c], eax
            //   895664               | mov                 dword ptr [esi + 0x64], edx

        $sequence_3 = { 83c40c 85c0 0f8565feffff 668b95a4fbffff }
            // n = 4, score = 500
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   0f8565feffff         | jne                 0xfffffe6b
            //   668b95a4fbffff       | mov                 dx, word ptr [ebp - 0x45c]

        $sequence_4 = { e8???????? 84c0 742c 53 8d9578fbffff 68???????? 52 }
            // n = 7, score = 500
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   742c                 | je                  0x2e
            //   53                   | push                ebx
            //   8d9578fbffff         | lea                 edx, [ebp - 0x488]
            //   68????????           |                     
            //   52                   | push                edx

        $sequence_5 = { 50 56 ffd7 6a00 8d5594 }
            // n = 5, score = 500
            //   50                   | push                eax
            //   56                   | push                esi
            //   ffd7                 | call                edi
            //   6a00                 | push                0
            //   8d5594               | lea                 edx, [ebp - 0x6c]

        $sequence_6 = { 5b 5d c20c00 83f803 7574 }
            // n = 5, score = 500
            //   5b                   | pop                 ebx
            //   5d                   | pop                 ebp
            //   c20c00               | ret                 0xc
            //   83f803               | cmp                 eax, 3
            //   7574                 | jne                 0x76

        $sequence_7 = { 898da8fbffff 8d45e8 8985b4fcffff 8b433c 8bd0 8d4ddc }
            // n = 6, score = 500
            //   898da8fbffff         | mov                 dword ptr [ebp - 0x458], ecx
            //   8d45e8               | lea                 eax, [ebp - 0x18]
            //   8985b4fcffff         | mov                 dword ptr [ebp - 0x34c], eax
            //   8b433c               | mov                 eax, dword ptr [ebx + 0x3c]
            //   8bd0                 | mov                 edx, eax
            //   8d4ddc               | lea                 ecx, [ebp - 0x24]

        $sequence_8 = { 6a00 6a00 ff15???????? 85c0 7516 }
            // n = 5, score = 500
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7516                 | jne                 0x18

        $sequence_9 = { 7407 3d50450000 7507 814da400004000 8b7da4 8b5d9c 8b4580 }
            // n = 7, score = 500
            //   7407                 | je                  9
            //   3d50450000           | cmp                 eax, 0x4550
            //   7507                 | jne                 9
            //   814da400004000       | or                  dword ptr [ebp - 0x5c], 0x400000
            //   8b7da4               | mov                 edi, dword ptr [ebp - 0x5c]
            //   8b5d9c               | mov                 ebx, dword ptr [ebp - 0x64]
            //   8b4580               | mov                 eax, dword ptr [ebp - 0x80]

    condition:
        7 of them and filesize < 524288
}