rule win_pseudo_manuscrypt_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.pseudo_manuscrypt."
        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.pseudo_manuscrypt"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 5d c20400 8b5508 53 8b9f80010000 8b4204 8b4818 }
            // n = 7, score = 200
            //   5d                   | pop                 ebp
            //   c20400               | ret                 4
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   53                   | push                ebx
            //   8b9f80010000         | mov                 ebx, dword ptr [edi + 0x180]
            //   8b4204               | mov                 eax, dword ptr [edx + 4]
            //   8b4818               | mov                 ecx, dword ptr [eax + 0x18]

        $sequence_1 = { 57 53 50 e8???????? 8b4e30 83c40c 894e04 }
            // n = 7, score = 200
            //   57                   | push                edi
            //   53                   | push                ebx
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b4e30               | mov                 ecx, dword ptr [esi + 0x30]
            //   83c40c               | add                 esp, 0xc
            //   894e04               | mov                 dword ptr [esi + 4], ecx

        $sequence_2 = { 56 ff15???????? 85ff 0f848d000000 8d44240c 8bcb 50 }
            // n = 7, score = 200
            //   56                   | push                esi
            //   ff15????????         |                     
            //   85ff                 | test                edi, edi
            //   0f848d000000         | je                  0x93
            //   8d44240c             | lea                 eax, [esp + 0xc]
            //   8bcb                 | mov                 ecx, ebx
            //   50                   | push                eax

        $sequence_3 = { 8bc1 33d2 668910 6aff 52 ff7510 e8???????? }
            // n = 7, score = 200
            //   8bc1                 | mov                 eax, ecx
            //   33d2                 | xor                 edx, edx
            //   668910               | mov                 word ptr [eax], dx
            //   6aff                 | push                -1
            //   52                   | push                edx
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   e8????????           |                     

        $sequence_4 = { 8bd8 53 e8???????? 83c404 8bf0 8d85f0fdffff 89b5ecfdffff }
            // n = 7, score = 200
            //   8bd8                 | mov                 ebx, eax
            //   53                   | push                ebx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8bf0                 | mov                 esi, eax
            //   8d85f0fdffff         | lea                 eax, [ebp - 0x210]
            //   89b5ecfdffff         | mov                 dword ptr [ebp - 0x214], esi

        $sequence_5 = { 46 83fe64 72c8 8b4dfc 8b8550feffff 33cd 5f }
            // n = 7, score = 200
            //   46                   | inc                 esi
            //   83fe64               | cmp                 esi, 0x64
            //   72c8                 | jb                  0xffffffca
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   8b8550feffff         | mov                 eax, dword ptr [ebp - 0x1b0]
            //   33cd                 | xor                 ecx, ebp
            //   5f                   | pop                 edi

        $sequence_6 = { e8???????? 83c408 8b44242c 85c0 7407 50 ff15???????? }
            // n = 7, score = 200
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8b44242c             | mov                 eax, dword ptr [esp + 0x2c]
            //   85c0                 | test                eax, eax
            //   7407                 | je                  9
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_7 = { 837e0400 7509 33c0 5e 8be5 5d c20800 }
            // n = 7, score = 200
            //   837e0400             | cmp                 dword ptr [esi + 4], 0
            //   7509                 | jne                 0xb
            //   33c0                 | xor                 eax, eax
            //   5e                   | pop                 esi
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c20800               | ret                 8

        $sequence_8 = { e8???????? 897dfc 8b4508 8b4d0c 894704 8bc7 c7474800000000 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   897dfc               | mov                 dword ptr [ebp - 4], edi
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   894704               | mov                 dword ptr [edi + 4], eax
            //   8bc7                 | mov                 eax, edi
            //   c7474800000000       | mov                 dword ptr [edi + 0x48], 0

        $sequence_9 = { 6a00 83ec08 6a00 68???????? e8???????? 83c414 8bf0 }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   83ec08               | sub                 esp, 8
            //   6a00                 | push                0
            //   68????????           |                     
            //   e8????????           |                     
            //   83c414               | add                 esp, 0x14
            //   8bf0                 | mov                 esi, eax

    condition:
        7 of them and filesize < 753664
}