rule win_shadowhammer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-08-17"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.shadowhammer"
        malpedia_rule_date = "20200817"
        malpedia_hash = "8c895fd01eccb47a6225bcb1a3ba53cbb98644c5"
        malpedia_version = "20200817"
        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 / approach 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 = { 754f 895df4 3bfb 7448 8b4508 }
            // n = 5, score = 100
            //   754f                 | jne                 0x51
            //   895df4               | mov                 dword ptr [ebp - 0xc], ebx
            //   3bfb                 | cmp                 edi, ebx
            //   7448                 | je                  0x4a
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

        $sequence_1 = { 5d c3 8b04c5dc794000 5d c3 8bff 55 }
            // n = 7, score = 100
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   8b04c5dc794000       | mov                 eax, dword ptr [eax*8 + 0x4079dc]
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   8bff                 | mov                 edi, edi
            //   55                   | push                ebp

        $sequence_2 = { be04a44000 a1???????? c745e401000000 50 ff15???????? }
            // n = 5, score = 100
            //   be04a44000           | mov                 esi, 0x40a404
            //   a1????????           |                     
            //   c745e401000000       | mov                 dword ptr [ebp - 0x1c], 1
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_3 = { 68287c4000 57 ffd6 681c7c4000 57 }
            // n = 5, score = 100
            //   68287c4000           | push                0x407c28
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   681c7c4000           | push                0x407c1c
            //   57                   | push                edi

        $sequence_4 = { 5b 66895dc0 33db 66895dc2 8bd8 }
            // n = 5, score = 100
            //   5b                   | pop                 ebx
            //   66895dc0             | mov                 word ptr [ebp - 0x40], bx
            //   33db                 | xor                 ebx, ebx
            //   66895dc2             | mov                 word ptr [ebp - 0x3e], bx
            //   8bd8                 | mov                 ebx, eax

        $sequence_5 = { 3d40984000 741b 3998b4000000 7513 50 e8???????? }
            // n = 6, score = 100
            //   3d40984000           | cmp                 eax, 0x409840
            //   741b                 | je                  0x1d
            //   3998b4000000         | cmp                 dword ptr [eax + 0xb4], ebx
            //   7513                 | jne                 0x15
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_6 = { ff5624 83c40c 57 8d8530fbffff 50 53 }
            // n = 6, score = 100
            //   ff5624               | call                dword ptr [esi + 0x24]
            //   83c40c               | add                 esp, 0xc
            //   57                   | push                edi
            //   8d8530fbffff         | lea                 eax, [ebp - 0x4d0]
            //   50                   | push                eax
            //   53                   | push                ebx

        $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 = { c3 33c0 648b0d00000000 817904f0604000 7510 8b510c 8b520c }
            // n = 7, score = 100
            //   c3                   | ret                 
            //   33c0                 | xor                 eax, eax
            //   648b0d00000000       | mov                 ecx, dword ptr fs:[0]
            //   817904f0604000       | cmp                 dword ptr [ecx + 4], 0x4060f0
            //   7510                 | jne                 0x12
            //   8b510c               | mov                 edx, dword ptr [ecx + 0xc]
            //   8b520c               | mov                 edx, dword ptr [edx + 0xc]

        $sequence_9 = { b801000000 c3 53 51 bb109b4000 }
            // n = 5, score = 100
            //   b801000000           | mov                 eax, 1
            //   c3                   | ret                 
            //   53                   | push                ebx
            //   51                   | push                ecx
            //   bb109b4000           | mov                 ebx, 0x409b10

    condition:
        7 of them and filesize < 49152
}