rule win_suncrypt_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.suncrypt."
        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.suncrypt"
        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 = { 0f118538ffffff 0f104598 0f118548ffffff 0f1045a8 0f118558ffffff e8???????? 8d8568ffffff }
            // n = 7, score = 200
            //   0f118538ffffff       | movups              xmmword ptr [ebp - 0xc8], xmm0
            //   0f104598             | movups              xmm0, xmmword ptr [ebp - 0x68]
            //   0f118548ffffff       | movups              xmmword ptr [ebp - 0xb8], xmm0
            //   0f1045a8             | movups              xmm0, xmmword ptr [ebp - 0x58]
            //   0f118558ffffff       | movups              xmmword ptr [ebp - 0xa8], xmm0
            //   e8????????           |                     
            //   8d8568ffffff         | lea                 eax, [ebp - 0x98]

        $sequence_1 = { 8d8508ffffff c68511ffffff00 50 ff15???????? 8bd0 85d2 0f84a3000000 }
            // n = 7, score = 200
            //   8d8508ffffff         | lea                 eax, [ebp - 0xf8]
            //   c68511ffffff00       | mov                 byte ptr [ebp - 0xef], 0
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bd0                 | mov                 edx, eax
            //   85d2                 | test                edx, edx
            //   0f84a3000000         | je                  0xa9

        $sequence_2 = { 0f2985f0fdffff 660fefc1 0f28c8 660f72f007 660f72d119 660febc8 }
            // n = 6, score = 200
            //   0f2985f0fdffff       | movaps              xmmword ptr [ebp - 0x210], xmm0
            //   660fefc1             | pxor                xmm0, xmm1
            //   0f28c8               | movaps              xmm1, xmm0
            //   660f72f007           | pslld               xmm0, 7
            //   660f72d119           | psrld               xmm1, 0x19
            //   660febc8             | por                 xmm1, xmm0

        $sequence_3 = { 8b8d64ffffff 02ca 0fbec0 33c8 888c1568ffffff 42 83fa09 }
            // n = 7, score = 200
            //   8b8d64ffffff         | mov                 ecx, dword ptr [ebp - 0x9c]
            //   02ca                 | add                 cl, dl
            //   0fbec0               | movsx               eax, al
            //   33c8                 | xor                 ecx, eax
            //   888c1568ffffff       | mov                 byte ptr [ebp + edx - 0x98], cl
            //   42                   | inc                 edx
            //   83fa09               | cmp                 edx, 9

        $sequence_4 = { c745fc???????? e8???????? 8bf8 83c404 85ff 743f }
            // n = 6, score = 200
            //   c745fc????????       |                     
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   83c404               | add                 esp, 4
            //   85ff                 | test                edi, edi
            //   743f                 | je                  0x41

        $sequence_5 = { ff15???????? 6a00 6a00 ff75f8 8bf0 8b4508 56 }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   8bf0                 | mov                 esi, eax
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   56                   | push                esi

        $sequence_6 = { 8b45fc ebdb 57 6a00 ff15???????? 50 }
            // n = 6, score = 200
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   ebdb                 | jmp                 0xffffffdd
            //   57                   | push                edi
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   50                   | push                eax

        $sequence_7 = { 8945f8 8d85dcfcffff 8945e4 8b4514 0f1000 0f11853cffffff 0f104010 }
            // n = 7, score = 200
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8d85dcfcffff         | lea                 eax, [ebp - 0x324]
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   8b4514               | mov                 eax, dword ptr [ebp + 0x14]
            //   0f1000               | movups              xmm0, xmmword ptr [eax]
            //   0f11853cffffff       | movups              xmmword ptr [ebp - 0xc4], xmm0
            //   0f104010             | movups              xmm0, xmmword ptr [eax + 0x10]

        $sequence_8 = { 8955f8 894dc8 8b4df4 660f1f440000 83f840 7321 }
            // n = 6, score = 200
            //   8955f8               | mov                 dword ptr [ebp - 8], edx
            //   894dc8               | mov                 dword ptr [ebp - 0x38], ecx
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   660f1f440000         | nop                 word ptr [eax + eax]
            //   83f840               | cmp                 eax, 0x40
            //   7321                 | jae                 0x23

        $sequence_9 = { 8845e8 8b45c0 0425 83f072 8845e9 8b45c0 0426 }
            // n = 7, score = 200
            //   8845e8               | mov                 byte ptr [ebp - 0x18], al
            //   8b45c0               | mov                 eax, dword ptr [ebp - 0x40]
            //   0425                 | add                 al, 0x25
            //   83f072               | xor                 eax, 0x72
            //   8845e9               | mov                 byte ptr [ebp - 0x17], al
            //   8b45c0               | mov                 eax, dword ptr [ebp - 0x40]
            //   0426                 | add                 al, 0x26

    condition:
        7 of them and filesize < 172032
}