rule win_seasalt_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.seasalt."
        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.seasalt"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 85c0 75a2 e9???????? ffd3 83f812 }
            // n = 5, score = 100
            //   85c0                 | test                eax, eax
            //   75a2                 | jne                 0xffffffa4
            //   e9????????           |                     
            //   ffd3                 | call                ebx
            //   83f812               | cmp                 eax, 0x12

        $sequence_1 = { 83f80c 77b8 ff2485b01c0010 8b15???????? 52 e8???????? }
            // n = 6, score = 100
            //   83f80c               | cmp                 eax, 0xc
            //   77b8                 | ja                  0xffffffba
            //   ff2485b01c0010       | jmp                 dword ptr [eax*4 + 0x10001cb0]
            //   8b15????????         |                     
            //   52                   | push                edx
            //   e8????????           |                     

        $sequence_2 = { 57 8965f0 e8???????? b909000000 be???????? 8dbd78feffff 33c0 }
            // n = 7, score = 100
            //   57                   | push                edi
            //   8965f0               | mov                 dword ptr [ebp - 0x10], esp
            //   e8????????           |                     
            //   b909000000           | mov                 ecx, 9
            //   be????????           |                     
            //   8dbd78feffff         | lea                 edi, [ebp - 0x188]
            //   33c0                 | xor                 eax, eax

        $sequence_3 = { 8bc6 c1f805 8d1c8540db0010 8bc6 83e01f 8d34c0 }
            // n = 6, score = 100
            //   8bc6                 | mov                 eax, esi
            //   c1f805               | sar                 eax, 5
            //   8d1c8540db0010       | lea                 ebx, [eax*4 + 0x1000db40]
            //   8bc6                 | mov                 eax, esi
            //   83e01f               | and                 eax, 0x1f
            //   8d34c0               | lea                 esi, [eax + eax*8]

        $sequence_4 = { 8b0cf504c90010 5e 8908 c3 81f9bc000000 }
            // n = 5, score = 100
            //   8b0cf504c90010       | mov                 ecx, dword ptr [esi*8 + 0x1000c904]
            //   5e                   | pop                 esi
            //   8908                 | mov                 dword ptr [eax], ecx
            //   c3                   | ret                 
            //   81f9bc000000         | cmp                 ecx, 0xbc

        $sequence_5 = { eba0 8b0d???????? 8d85e0feffff 50 }
            // n = 4, score = 100
            //   eba0                 | jmp                 0xffffffa2
            //   8b0d????????         |                     
            //   8d85e0feffff         | lea                 eax, [ebp - 0x120]
            //   50                   | push                eax

        $sequence_6 = { a1???????? 53 53 68???????? 8d942484000000 6800020000 }
            // n = 6, score = 100
            //   a1????????           |                     
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   68????????           |                     
            //   8d942484000000       | lea                 edx, [esp + 0x84]
            //   6800020000           | push                0x200

        $sequence_7 = { 50 53 ffd5 8d4c2412 51 e8???????? }
            // n = 6, score = 100
            //   50                   | push                eax
            //   53                   | push                ebx
            //   ffd5                 | call                ebp
            //   8d4c2412             | lea                 ecx, [esp + 0x12]
            //   51                   | push                ecx
            //   e8????????           |                     

        $sequence_8 = { 6800010000 56 50 ff15???????? b980000000 33c0 }
            // n = 6, score = 100
            //   6800010000           | push                0x100
            //   56                   | push                esi
            //   50                   | push                eax
            //   ff15????????         |                     
            //   b980000000           | mov                 ecx, 0x80
            //   33c0                 | xor                 eax, eax

        $sequence_9 = { 68???????? 51 8975e0 8975e8 8975dc 8975fc }
            // n = 6, score = 100
            //   68????????           |                     
            //   51                   | push                ecx
            //   8975e0               | mov                 dword ptr [ebp - 0x20], esi
            //   8975e8               | mov                 dword ptr [ebp - 0x18], esi
            //   8975dc               | mov                 dword ptr [ebp - 0x24], esi
            //   8975fc               | mov                 dword ptr [ebp - 4], esi

    condition:
        7 of them and filesize < 139264
}