rule win_shadowhammer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { ff5604 8bf8 8d45fc 50 57 53 53 }
            // n = 7, score = 100
            //   ff5604               | call                dword ptr [esi + 4]
            //   8bf8                 | mov                 edi, eax
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   57                   | push                edi
            //   53                   | push                ebx
            //   53                   | push                ebx

        $sequence_1 = { 8b5020 56 8b701c 57 8b7824 8b4018 }
            // n = 6, score = 100
            //   8b5020               | mov                 edx, dword ptr [eax + 0x20]
            //   56                   | push                esi
            //   8b701c               | mov                 esi, dword ptr [eax + 0x1c]
            //   57                   | push                edi
            //   8b7824               | mov                 edi, dword ptr [eax + 0x24]
            //   8b4018               | mov                 eax, dword ptr [eax + 0x18]

        $sequence_2 = { 5f 5e 741b 68b4a84000 e8???????? }
            // n = 5, score = 100
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   741b                 | je                  0x1d
            //   68b4a84000           | push                0x40a8b4
            //   e8????????           |                     

        $sequence_3 = { 8d458c 8945a8 8d8574ffffff 33ff }
            // n = 4, score = 100
            //   8d458c               | lea                 eax, [ebp - 0x74]
            //   8945a8               | mov                 dword ptr [ebp - 0x58], eax
            //   8d8574ffffff         | lea                 eax, [ebp - 0x8c]
            //   33ff                 | xor                 edi, edi

        $sequence_4 = { 3d01010000 7d0d 8a4c181c 888838954000 40 ebe9 }
            // n = 6, score = 100
            //   3d01010000           | cmp                 eax, 0x101
            //   7d0d                 | jge                 0xf
            //   8a4c181c             | mov                 cl, byte ptr [eax + ebx + 0x1c]
            //   888838954000         | mov                 byte ptr [eax + 0x409538], cl
            //   40                   | inc                 eax
            //   ebe9                 | jmp                 0xffffffeb

        $sequence_5 = { c785acfdffff4aa5fff2 8895b0fdffff c785b1fdffff0d244779 66c785b5fdffff0d7d c685b7fdffff32 8dbdb8fdffff }
            // n = 6, score = 100
            //   c785acfdffff4aa5fff2     | mov    dword ptr [ebp - 0x254], 0xf2ffa54a
            //   8895b0fdffff         | mov                 byte ptr [ebp - 0x250], dl
            //   c785b1fdffff0d244779     | mov    dword ptr [ebp - 0x24f], 0x7947240d
            //   66c785b5fdffff0d7d     | mov    word ptr [ebp - 0x24b], 0x7d0d
            //   c685b7fdffff32       | mov                 byte ptr [ebp - 0x249], 0x32
            //   8dbdb8fdffff         | lea                 edi, [ebp - 0x248]

        $sequence_6 = { ff45fc 8b45fc 3b45f4 7cb7 ebae 8b45f0 ebab }
            // n = 7, score = 100
            //   ff45fc               | inc                 dword ptr [ebp - 4]
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   3b45f4               | cmp                 eax, dword ptr [ebp - 0xc]
            //   7cb7                 | jl                  0xffffffb9
            //   ebae                 | jmp                 0xffffffb0
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]
            //   ebab                 | jmp                 0xffffffad

        $sequence_7 = { 740e 6800400000 6800005000 57 ff5618 5f 5b }
            // n = 7, score = 100
            //   740e                 | je                  0x10
            //   6800400000           | push                0x4000
            //   6800005000           | push                0x500000
            //   57                   | push                edi
            //   ff5618               | call                dword ptr [esi + 0x18]
            //   5f                   | pop                 edi
            //   5b                   | pop                 ebx

        $sequence_8 = { 7520 81fb18934000 7407 53 e8???????? 59 }
            // n = 6, score = 100
            //   7520                 | jne                 0x22
            //   81fb18934000         | cmp                 ebx, 0x409318
            //   7407                 | je                  9
            //   53                   | push                ebx
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_9 = { 8b401c 8b08 3bc8 7439 }
            // n = 4, score = 100
            //   8b401c               | mov                 eax, dword ptr [eax + 0x1c]
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   3bc8                 | cmp                 ecx, eax
            //   7439                 | je                  0x3b

    condition:
        7 of them and filesize < 49152
}