rule win_spica_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.spica."
        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.spica"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { eb0b 4c8b8568020000 4d8b40f8 488b0d???????? 31d2 ff15???????? 80bdfc02000000 }
            // n = 7, score = 100
            //   eb0b                 | je                  0x6f
            //   4c8b8568020000       | jmp                 0x41
            //   4d8b40f8             | mov                 eax, edx
            //   488b0d????????       |                     
            //   31d2                 | xor                 edx, edx
            //   ff15????????         |                     
            //   80bdfc02000000       | inc                 ecx

        $sequence_1 = { ff8394010000 e9???????? 40387363 0f8570fdffff e9???????? 488bbbb8010000 4885ff }
            // n = 7, score = 100
            //   ff8394010000         | inc                 dword ptr [ecx + 0x198]
            //   e9????????           |                     
            //   40387363             | dec                 eax
            //   0f8570fdffff         | mov                 edx, eax
            //   e9????????           |                     
            //   488bbbb8010000       | dec                 esp
            //   4885ff               | mov                 edi, eax

        $sequence_2 = { e8???????? 4883bd8805000000 7416 4c8b8580050000 488b0d???????? 31d2 ff15???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   4883bd8805000000     | movaps              xmmword ptr [esp + 0x280], xmm6
            //   7416                 | dec                 eax
            //   4c8b8580050000       | mov                 dword ptr [esp + 0x2a0], 0
            //   488b0d????????       |                     
            //   31d2                 | dec                 eax
            //   ff15????????         |                     

        $sequence_3 = { ffd0 e9???????? 488d4b10 e8???????? 488b5df8 488b4350 4885c0 }
            // n = 7, score = 100
            //   ffd0                 | inc                 esp
            //   e9????????           |                     
            //   488d4b10             | mov                 eax, dword ptr [eax + ecx*4]
            //   e8????????           |                     
            //   488b5df8             | dec                 esp
            //   488b4350             | lea                 esi, [eax + ecx*4]
            //   4885c0               | dec                 ecx

        $sequence_4 = { e8???????? 488d4d50 488d95e0010000 41b8d6000000 e8???????? 0f288580050000 660f6f8d90050000 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   488d4d50             | dec                 esp
            //   488d95e0010000       | mov                 dword ptr [esp + 0x50], ebp
            //   41b8d6000000         | xor                 edx, edx
            //   e8????????           |                     
            //   0f288580050000       | dec                 eax
            //   660f6f8d90050000     | mov                 ebx, eax

        $sequence_5 = { ffc1 c74402fc01000000 3b4b14 7ce9 488d6b54 e9???????? 397b54 }
            // n = 7, score = 100
            //   ffc1                 | inc                 eax
            //   c74402fc01000000     | dec                 eax
            //   3b4b14               | mov                 ecx, dword ptr [ebp - 0x78]
            //   7ce9                 | dec                 esp
            //   488d6b54             | mov                 dword ptr [ebp + 0x68], ebp
            //   e9????????           |                     
            //   397b54               | dec                 eax

        $sequence_6 = { ff5018 84c0 0f8596010000 488b4e20 488b4628 488d15cbbd4e00 41b801000000 }
            // n = 7, score = 100
            //   ff5018               | mov                 esi, dword ptr [ebx + 0x2c]
            //   84c0                 | dec                 eax
            //   0f8596010000         | mov                 esi, dword ptr [ebx + 0x10]
            //   488b4e20             | dec                 eax
            //   488b4628             | mov                 edi, dword ptr [ebx + 0x20]
            //   488d15cbbd4e00       | call                dword ptr [eax + 0x18]
            //   41b801000000         | dec                 eax

        $sequence_7 = { eb04 488b5b10 4885db 0f84d4000000 488b0e 48897c2438 4c897c2440 }
            // n = 7, score = 100
            //   eb04                 | je                  0xa41
            //   488b5b10             | dec                 eax
            //   4885db               | cmp                 dword ptr [ecx], edi
            //   0f84d4000000         | je                  0xa3a
            //   488b0e               | jmp                 0xa34
            //   48897c2438           | dec                 eax
            //   4c897c2440           | mov                 dword ptr [eax], edi

        $sequence_8 = { e8???????? c0e007 3084249f000000 0f28842490000000 410f114710 0f28842480000000 410f1107 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   c0e007               | movzx               eax, word ptr [ecx + 8]
            //   3084249f000000       | test                al, 2
            //   0f28842490000000     | mov                 edi, eax
            //   410f114710           | inc                 ecx
            //   0f28842480000000     | mov                 esi, 1
            //   410f1107             | test                eax, eax

        $sequence_9 = { ff15???????? 4885c0 0f84a0380000 488905???????? 41b818000000 4889c1 31d2 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   4885c0               | mov                 ecx, eax
            //   0f84a0380000         | dec                 eax
            //   488905????????       |                     
            //   41b818000000         | test                eax, eax
            //   4889c1               | je                  0x22a
            //   31d2                 | mov                 word ptr [eax], 0xa

    condition:
        7 of them and filesize < 14034944
}