rule win_shadowhammer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.shadowhammer."
        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.shadowhammer"
        malpedia_rule_date = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { 50 6afe 68f0604000 64ff3500000000 a1???????? 33c4 }
            // n = 6, score = 100
            //   50                   | push                eax
            //   6afe                 | push                -2
            //   68f0604000           | push                0x4060f0
            //   64ff3500000000       | push                dword ptr fs:[0]
            //   a1????????           |                     
            //   33c4                 | xor                 eax, esp

        $sequence_1 = { 8b7510 6a10 8d45e0 56 50 }
            // n = 5, score = 100
            //   8b7510               | mov                 esi, dword ptr [ebp + 0x10]
            //   6a10                 | push                0x10
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   56                   | push                esi
            //   50                   | push                eax

        $sequence_2 = { 8dbd7dfdffff ab ab ab ab }
            // n = 5, score = 100
            //   8dbd7dfdffff         | lea                 edi, [ebp - 0x283]
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax

        $sequence_3 = { 57 83d202 52 50 e8???????? 8945f4 }
            // n = 6, score = 100
            //   57                   | push                edi
            //   83d202               | adc                 edx, 2
            //   52                   | push                edx
            //   50                   | push                eax
            //   e8????????           |                     
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax

        $sequence_4 = { c7855cffffff72006e00 c78560ffffff65006c00 c78564ffffff33003200 c78568ffffff2e006400 c7856cffffff6c006c00 89bd70ffffff }
            // n = 6, score = 100
            //   c7855cffffff72006e00     | mov    dword ptr [ebp - 0xa4], 0x6e0072
            //   c78560ffffff65006c00     | mov    dword ptr [ebp - 0xa0], 0x6c0065
            //   c78564ffffff33003200     | mov    dword ptr [ebp - 0x9c], 0x320033
            //   c78568ffffff2e006400     | mov    dword ptr [ebp - 0x98], 0x64002e
            //   c7856cffffff6c006c00     | mov    dword ptr [ebp - 0x94], 0x6c006c
            //   89bd70ffffff         | mov                 dword ptr [ebp - 0x90], edi

        $sequence_5 = { 83c604 ff45fc 8b45fc 3b441ddc }
            // n = 4, score = 100
            //   83c604               | add                 esi, 4
            //   ff45fc               | inc                 dword ptr [ebp - 4]
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   3b441ddc             | cmp                 eax, dword ptr [ebp + ebx - 0x24]

        $sequence_6 = { 8b45f4 ff3430 ff75f0 e8???????? 59 }
            // n = 5, score = 100
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   ff3430               | push                dword ptr [eax + esi]
            //   ff75f0               | push                dword ptr [ebp - 0x10]
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_7 = { 66c785b0fefffff758 8895b2feffff c785b3feffff4e734077 c785b7feffffc70532e9 8895bbfeffff }
            // n = 5, score = 100
            //   66c785b0fefffff758     | mov    word ptr [ebp - 0x150], 0x58f7
            //   8895b2feffff         | mov                 byte ptr [ebp - 0x14e], dl
            //   c785b3feffff4e734077     | mov    dword ptr [ebp - 0x14d], 0x7740734e
            //   c785b7feffffc70532e9     | mov    dword ptr [ebp - 0x149], 0xe93205c7
            //   8895bbfeffff         | mov                 byte ptr [ebp - 0x145], dl

        $sequence_8 = { 3b04cd70914000 7413 41 83f92d 72f1 8d48ed 83f911 }
            // n = 7, score = 100
            //   3b04cd70914000       | cmp                 eax, dword ptr [ecx*8 + 0x409170]
            //   7413                 | je                  0x15
            //   41                   | inc                 ecx
            //   83f92d               | cmp                 ecx, 0x2d
            //   72f1                 | jb                  0xfffffff3
            //   8d48ed               | lea                 ecx, [eax - 0x13]
            //   83f911               | cmp                 ecx, 0x11

        $sequence_9 = { 8d45dc 6a03 50 57 ff561c 83c418 }
            // n = 6, score = 100
            //   8d45dc               | lea                 eax, [ebp - 0x24]
            //   6a03                 | push                3
            //   50                   | push                eax
            //   57                   | push                edi
            //   ff561c               | call                dword ptr [esi + 0x1c]
            //   83c418               | add                 esp, 0x18

    condition:
        7 of them and filesize < 49152
}