rule win_sepulcher_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.sepulcher."
        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.sepulcher"
        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 = { c7042498250000 8bf0 51 56 e8???????? 8b8f50460000 83c40c }
            // n = 7, score = 100
            //   c7042498250000       | mov                 dword ptr [esp], 0x2598
            //   8bf0                 | mov                 esi, eax
            //   51                   | push                ecx
            //   56                   | push                esi
            //   e8????????           |                     
            //   8b8f50460000         | mov                 ecx, dword ptr [edi + 0x4650]
            //   83c40c               | add                 esp, 0xc

        $sequence_1 = { eb26 0fb7c3 c1e002 0fb7d3 66393408 8b75fc 7417 }
            // n = 7, score = 100
            //   eb26                 | jmp                 0x28
            //   0fb7c3               | movzx               eax, bx
            //   c1e002               | shl                 eax, 2
            //   0fb7d3               | movzx               edx, bx
            //   66393408             | cmp                 word ptr [eax + ecx], si
            //   8b75fc               | mov                 esi, dword ptr [ebp - 4]
            //   7417                 | je                  0x19

        $sequence_2 = { 83c40c c7459840000000 8d4598 50 ff15???????? 8b45a0 }
            // n = 6, score = 100
            //   83c40c               | add                 esp, 0xc
            //   c7459840000000       | mov                 dword ptr [ebp - 0x68], 0x40
            //   8d4598               | lea                 eax, [ebp - 0x68]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b45a0               | mov                 eax, dword ptr [ebp - 0x60]

        $sequence_3 = { 50 8d8554daffff 8bf1 50 e8???????? 83c40c }
            // n = 6, score = 100
            //   50                   | push                eax
            //   8d8554daffff         | lea                 eax, [ebp - 0x25ac]
            //   8bf1                 | mov                 esi, ecx
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

        $sequence_4 = { 83c410 84c0 741c 85db 7507 c746346c5c0110 }
            // n = 6, score = 100
            //   83c410               | add                 esp, 0x10
            //   84c0                 | test                al, al
            //   741c                 | je                  0x1e
            //   85db                 | test                ebx, ebx
            //   7507                 | jne                 9
            //   c746346c5c0110       | mov                 dword ptr [esi + 0x34], 0x10015c6c

        $sequence_5 = { ff15???????? 85c0 7423 83a564f1ffff00 }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7423                 | je                  0x25
            //   83a564f1ffff00       | and                 dword ptr [ebp - 0xe9c], 0

        $sequence_6 = { 8bce e8???????? 85c0 75da 8bce 5e }
            // n = 6, score = 100
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   75da                 | jne                 0xffffffdc
            //   8bce                 | mov                 ecx, esi
            //   5e                   | pop                 esi

        $sequence_7 = { 0f84ff000000 8b550c 85d2 0f84f4000000 8d4101 89561c 894618 }
            // n = 7, score = 100
            //   0f84ff000000         | je                  0x105
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   85d2                 | test                edx, edx
            //   0f84f4000000         | je                  0xfa
            //   8d4101               | lea                 eax, [ecx + 1]
            //   89561c               | mov                 dword ptr [esi + 0x1c], edx
            //   894618               | mov                 dword ptr [esi + 0x18], eax

        $sequence_8 = { 51 51 56 51 894de0 ff15???????? 85c0 }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   51                   | push                ecx
            //   56                   | push                esi
            //   51                   | push                ecx
            //   894de0               | mov                 dword ptr [ebp - 0x20], ecx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

        $sequence_9 = { 8b35???????? 85f6 7420 6bc618 57 8db848dc0110 }
            // n = 6, score = 100
            //   8b35????????         |                     
            //   85f6                 | test                esi, esi
            //   7420                 | je                  0x22
            //   6bc618               | imul                eax, esi, 0x18
            //   57                   | push                edi
            //   8db848dc0110         | lea                 edi, [eax + 0x1001dc48]

    condition:
        7 of them and filesize < 279552
}