rule win_taintedscribe_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 895664 884660 894658 894670 894654 894e68 89466c }
            // n = 7, score = 500
            //   895664               | mov                 dword ptr [esi + 0x64], edx
            //   884660               | mov                 byte ptr [esi + 0x60], al
            //   894658               | mov                 dword ptr [esi + 0x58], eax
            //   894670               | mov                 dword ptr [esi + 0x70], eax
            //   894654               | mov                 dword ptr [esi + 0x54], eax
            //   894e68               | mov                 dword ptr [esi + 0x68], ecx
            //   89466c               | mov                 dword ptr [esi + 0x6c], eax

        $sequence_1 = { 8b4ddc 50 51 e8???????? 8bca }
            // n = 5, score = 500
            //   8b4ddc               | mov                 ecx, dword ptr [ebp - 0x24]
            //   50                   | push                eax
            //   51                   | push                ecx
            //   e8????????           |                     
            //   8bca                 | mov                 ecx, edx

        $sequence_2 = { 3bfe 750e 8bcb e8???????? }
            // n = 4, score = 500
            //   3bfe                 | cmp                 edi, esi
            //   750e                 | jne                 0x10
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     

        $sequence_3 = { 33c0 8995acfbffff 0fb65338 8855ed 668985a0fbffff 898da8fbffff }
            // n = 6, score = 500
            //   33c0                 | xor                 eax, eax
            //   8995acfbffff         | mov                 dword ptr [ebp - 0x454], edx
            //   0fb65338             | movzx               edx, byte ptr [ebx + 0x38]
            //   8855ed               | mov                 byte ptr [ebp - 0x13], dl
            //   668985a0fbffff       | mov                 word ptr [ebp - 0x460], ax
            //   898da8fbffff         | mov                 dword ptr [ebp - 0x458], ecx

        $sequence_4 = { 8d4da8 51 ff15???????? 8d55b8 }
            // n = 4, score = 500
            //   8d4da8               | lea                 ecx, [ebp - 0x58]
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8d55b8               | lea                 edx, [ebp - 0x48]

        $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 = { 56 e8???????? 8894373c1b0000 8d8eb41e0000 83c40c }
            // n = 5, score = 500
            //   56                   | push                esi
            //   e8????????           |                     
            //   8894373c1b0000       | mov                 byte ptr [edi + esi + 0x1b3c], dl
            //   8d8eb41e0000         | lea                 ecx, [esi + 0x1eb4]
            //   83c40c               | add                 esp, 0xc

        $sequence_7 = { 8b5d10 83c404 837d1400 0f84a3000000 }
            // n = 4, score = 500
            //   8b5d10               | mov                 ebx, dword ptr [ebp + 0x10]
            //   83c404               | add                 esp, 4
            //   837d1400             | cmp                 dword ptr [ebp + 0x14], 0
            //   0f84a3000000         | je                  0xa9

        $sequence_8 = { 8b550c 83c40c 8b8e68af0100 8b07 }
            // n = 4, score = 500
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   83c40c               | add                 esp, 0xc
            //   8b8e68af0100         | mov                 ecx, dword ptr [esi + 0x1af68]
            //   8b07                 | mov                 eax, dword ptr [edi]

        $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
}