rule win_manjusaka_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.manjusaka."
        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.manjusaka"
        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 = { f348a5 488b5068 488b4070 4889442458 488dbc24b0000000 b90d000000 4c89c6 }
            // n = 7, score = 100
            //   f348a5               | cmp                 edx, ebx
            //   488b5068             | je                  0x539
            //   488b4070             | dec                 eax
            //   4889442458           | mov                 esi, ebx
            //   488dbc24b0000000     | xor                 ebx, ebx
            //   b90d000000           | mov                 edi, 8
            //   4c89c6               | mov                 esi, 8

        $sequence_1 = { b8b4000000 8902 418bc1 e9???????? c70235000000 498bc0 8079013d }
            // n = 7, score = 100
            //   b8b4000000           | inc                 ecx
            //   8902                 | add                 edx, ebx
            //   418bc1               | mov                 dword ptr [esp + 0x20], edx
            //   e9????????           |                     
            //   c70235000000         | mov                 dword ptr [ebp + 0x24], edx
            //   498bc0               | dec                 eax
            //   8079013d             | cmp                 esi, 0x10

        $sequence_2 = { 8b942434010000 894e19 89561c b902000000 4c8dac2488030000 49894d00 410f117508 }
            // n = 7, score = 100
            //   8b942434010000       | dec                 ebp
            //   894e19               | mov                 ecx, dword ptr [ebp + 8]
            //   89561c               | jmp                 0xe74
            //   b902000000           | dec                 esp
            //   4c8dac2488030000     | mov                 ebp, dword ptr [esp + 0x50]
            //   49894d00             | test                byte ptr [ebx + 4], 0x20
            //   410f117508           | je                  0xede

        $sequence_3 = { e8???????? 8b06 83f804 0f85a1000000 41807f6800 742a 4d8b4f50 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8b06                 | ret                 
            //   83f804               | mov                 ecx, ecx
            //   0f85a1000000         | dec                 eax
            //   41807f6800           | mov                 eax, 0x79746573
            //   742a                 | bound               esp, qword ptr [ebp + 0x70]
            //   4d8b4f50             | dec                 eax

        $sequence_4 = { ba3a000000 41ffd7 84c0 0f85f5000000 4c896dd0 488d05c6050000 488945d8 }
            // n = 7, score = 100
            //   ba3a000000           | mov                 eax, dword ptr [ebp - 0x40]
            //   41ffd7               | inc                 ebp
            //   84c0                 | add                 ebp, edx
            //   0f85f5000000         | inc                 ebp
            //   4c896dd0             | xor                 ebx, ebx
            //   488d05c6050000       | dec                 eax
            //   488945d8             | mov                 dword ptr [ebp + ebx*8 + 0x90], edi

        $sequence_5 = { e8???????? c646f80e 0f10442460 0f104c2470 0f298424b0000000 0f298c24c0000000 410f114f10 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   c646f80e             | cmp                 esi, dword ptr [ebx + 0x1f4]
            //   0f10442460           | jl                  0x820
            //   0f104c2470           | dec                 eax
            //   0f298424b0000000     | mov                 edx, edi
            //   0f298c24c0000000     | dec                 eax
            //   410f114f10           | mov                 ecx, ebx

        $sequence_6 = { 4d85ff 751f 4c8bef 83cbff 488b4dd8 44394908 0f8587000000 }
            // n = 7, score = 100
            //   4d85ff               | dec                 eax
            //   751f                 | lea                 eax, [0x19bd09]
            //   4c8bef               | dec                 eax
            //   83cbff               | mov                 dword ptr [ebp], eax
            //   488b4dd8             | dec                 eax
            //   44394908             | lea                 eax, [0xffff93b6]
            //   0f8587000000         | dec                 eax

        $sequence_7 = { e8???????? 0f1005???????? 0f1100 8b0d???????? 89480f 49c7042410000000 4989442408 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   0f1005????????       |                     
            //   0f1100               | mov                 dword ptr [esp + 0x60], edx
            //   8b0d????????         |                     
            //   89480f               | dec                 eax
            //   49c7042410000000     | mov                 dword ptr [esp + 0x68], 0
            //   4989442408           | mov                 dl, 0x30

        $sequence_8 = { eb2b 4c8d05dc2f1900 ba20010000 4889c1 eb1a 4c8d05e32f1900 ba11000000 }
            // n = 7, score = 100
            //   eb2b                 | jne                 0x4cc
            //   4c8d05dc2f1900       | xor                 ebx, ebx
            //   ba20010000           | jmp                 0x4e8
            //   4889c1               | test                eax, eax
            //   eb1a                 | jne                 0x942
            //   4c8d05e32f1900       | inc                 ebp
            //   ba11000000           | xor                 eax, eax

        $sequence_9 = { e8???????? 488bce 488be8 e8???????? 4c8be8 4885db 0f845b010000 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   488bce               | lea                 ecx, [0x1435b1]
            //   488be8               | dec                 eax
            //   e8????????           |                     
            //   4c8be8               | mov                 dword ptr [eax + 0x10], ecx
            //   4885db               | mov                 byte ptr [eax], 0xa
            //   0f845b010000         | ret                 

    condition:
        7 of them and filesize < 4772864
}