rule win_sepulcher_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.sepulcher"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { 8bb55cdaffff 8bcb e8???????? 85f6 7407 }
            // n = 5, score = 100
            //   8bb55cdaffff         | mov                 esi, dword ptr [ebp - 0x25a4]
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     
            //   85f6                 | test                esi, esi
            //   7407                 | je                  9

        $sequence_1 = { 6a00 8d55f4 898678480000 52 8d8664480000 8d8e60480000 50 }
            // n = 7, score = 100
            //   6a00                 | push                0
            //   8d55f4               | lea                 edx, [ebp - 0xc]
            //   898678480000         | mov                 dword ptr [esi + 0x4878], eax
            //   52                   | push                edx
            //   8d8664480000         | lea                 eax, [esi + 0x4864]
            //   8d8e60480000         | lea                 ecx, [esi + 0x4860]
            //   50                   | push                eax

        $sequence_2 = { 6828080000 50 e8???????? 8b8d18d2ffff }
            // n = 4, score = 100
            //   6828080000           | push                0x828
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b8d18d2ffff         | mov                 ecx, dword ptr [ebp - 0x2de8]

        $sequence_3 = { 55 8bec b8f82d0000 e8???????? a1???????? 33c5 8945f8 }
            // n = 7, score = 100
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   b8f82d0000           | mov                 eax, 0x2df8
            //   e8????????           |                     
            //   a1????????           |                     
            //   33c5                 | xor                 eax, ebp
            //   8945f8               | mov                 dword ptr [ebp - 8], eax

        $sequence_4 = { 8bec b8a4250000 e8???????? a1???????? }
            // n = 4, score = 100
            //   8bec                 | mov                 ebp, esp
            //   b8a4250000           | mov                 eax, 0x25a4
            //   e8????????           |                     
            //   a1????????           |                     

        $sequence_5 = { ff15???????? ffb5e4f7ffff ff15???????? 6a02 668985eaf7ffff 58 668985e8f7ffff }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   ffb5e4f7ffff         | push                dword ptr [ebp - 0x81c]
            //   ff15????????         |                     
            //   6a02                 | push                2
            //   668985eaf7ffff       | mov                 word ptr [ebp - 0x816], ax
            //   58                   | pop                 eax
            //   668985e8f7ffff       | mov                 word ptr [ebp - 0x818], ax

        $sequence_6 = { 85f6 0f8497000000 85c0 0f848f000000 8d0445ffff0000 50 e8???????? }
            // n = 7, score = 100
            //   85f6                 | test                esi, esi
            //   0f8497000000         | je                  0x9d
            //   85c0                 | test                eax, eax
            //   0f848f000000         | je                  0x95
            //   8d0445ffff0000       | lea                 eax, [eax*2 + 0xffff]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_7 = { 8b35???????? 8d85d8f7ffff 6a04 5f 57 33c9 }
            // n = 6, score = 100
            //   8b35????????         |                     
            //   8d85d8f7ffff         | lea                 eax, [ebp - 0x828]
            //   6a04                 | push                4
            //   5f                   | pop                 edi
            //   57                   | push                edi
            //   33c9                 | xor                 ecx, ecx

        $sequence_8 = { 50 ffb5e4f7ffff eb24 83bdd4f7ffff00 }
            // n = 4, score = 100
            //   50                   | push                eax
            //   ffb5e4f7ffff         | push                dword ptr [ebp - 0x81c]
            //   eb24                 | jmp                 0x26
            //   83bdd4f7ffff00       | cmp                 dword ptr [ebp - 0x82c], 0

        $sequence_9 = { 50 0fb6856bf7ffff 50 0fb6856af7ffff }
            // n = 4, score = 100
            //   50                   | push                eax
            //   0fb6856bf7ffff       | movzx               eax, byte ptr [ebp - 0x895]
            //   50                   | push                eax
            //   0fb6856af7ffff       | movzx               eax, byte ptr [ebp - 0x896]

    condition:
        7 of them and filesize < 279552
}