rule win_manjusaka_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { b802000000 f0490fb10e 488d4c2428 e8???????? 90 4883c448 5b }
            // n = 7, score = 100
            //   b802000000           | cmp                 ecx, 0xfe00
            //   f0490fb10e           | ja                  0x10ac
            //   488d4c2428           | inc                 ecx
            //   e8????????           |                     
            //   90                   | and                 ch, 1
            //   4883c448             | mov                 dword ptr [ebx + 0x38], eax
            //   5b                   | dec                 eax

        $sequence_1 = { 84c0 745a 488b4f70 4c8bc7 488b17 4883c108 e8???????? }
            // n = 7, score = 100
            //   84c0                 | mov                 dword ptr [esp + 0x48], ebx
            //   745a                 | btr                 edx, 0x1f
            //   488b4f70             | mov                 dword ptr [esp + 0x28], edx
            //   4c8bc7               | cmp                 ecx, 0x2e
            //   488b17               | je                  0x5c3
            //   4883c108             | cmp                 ecx, 0x30
            //   e8????????           |                     

        $sequence_2 = { e9???????? 488b8c24e8030000 488b9424d8030000 e8???????? 488b442448 4c8ba858010000 488bb060010000 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   488b8c24e8030000     | mov                 dword ptr [esp + 0x48], eax
            //   488b9424d8030000     | dec                 eax
            //   e8????????           |                     
            //   488b442448           | mov                 dword ptr [esi + 0x20], edi
            //   4c8ba858010000       | mov                 dword ptr [esi + 0x28], edi
            //   488bb060010000       | dec                 esp

        $sequence_3 = { 84c0 410f95c1 488d5c2428 4889d9 4c89ea 41b812000000 e8???????? }
            // n = 7, score = 100
            //   84c0                 | jbe                 0x46f
            //   410f95c1             | dec                 esp
            //   488d5c2428           | mov                 ecx, esi
            //   4889d9               | mov                 dword ptr [esp + 0x20], 0xb78a
            //   4c89ea               | dec                 esp
            //   41b812000000         | lea                 eax, [0xfe8c3]
            //   e8????????           |                     

        $sequence_4 = { 7204 4d8b40f8 488b0d???????? 31d2 e8???????? 488b4b58 488b4360 }
            // n = 7, score = 100
            //   7204                 | lea                 edi, [esp + 0x60]
            //   4d8b40f8             | inc                 ecx
            //   488b0d????????       |                     
            //   31d2                 | mov                 eax, 0xb8
            //   e8????????           |                     
            //   488b4b58             | push                edi
            //   488b4360             | push                ebp

        $sequence_5 = { eb0f b9741a0100 e9???????? 4a8b5cfd60 0fb74318 0fb64b0c 03c2 }
            // n = 7, score = 100
            //   eb0f                 | je                  0x645
            //   b9741a0100           | dec                 eax
            //   e9????????           |                     
            //   4a8b5cfd60           | mov                 ebx, dword ptr [ebx + 0x10]
            //   0fb74318             | dec                 eax
            //   0fb64b0c             | test                ebx, ebx
            //   03c2                 | jne                 0x637

        $sequence_6 = { e8???????? 4885d2 7415 4c39e8 7509 4c39e2 0f846a010000 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   4885d2               | mov                 dword ptr [ebp + 0x410], ebx
            //   7415                 | dec                 esp
            //   4c39e8               | cmp                 ebx, esp
            //   7509                 | dec                 eax
            //   4c39e2               | cmp                 dword ptr [ebp + 0x3c0], 0
            //   0f846a010000         | dec                 eax

        $sequence_7 = { 8bf0 8b5b54 23de 83fb11 0f8520010000 418bc7 4503fd }
            // n = 7, score = 100
            //   8bf0                 | inc                 ecx
            //   8b5b54               | pop                 edi
            //   23de                 | inc                 ecx
            //   83fb11               | pop                 esi
            //   0f8520010000         | mov                 eax, ebx
            //   418bc7               | jmp                 0x1dbe
            //   4503fd               | dec                 eax

        $sequence_8 = { 84db 7805 49ffc4 eb6e 89d9 83e11f 410fb6742401 }
            // n = 7, score = 100
            //   84db                 | dec                 eax
            //   7805                 | lea                 eax, [ebp - 0x40]
            //   49ffc4               | cmp                 edi, 1
            //   eb6e                 | inc                 esp
            //   89d9                 | lea                 eax, [eax - 0x2f]
            //   83e11f               | inc                 esp
            //   410fb6742401         | cmove               eax, eax

        $sequence_9 = { fec0 884322 e9???????? 8d4d01 48897308 894b28 488bc7 }
            // n = 7, score = 100
            //   fec0                 | mov                 ecx, ebx
            //   884322               | test                byte ptr [edi + 0x2c], 2
            //   e9????????           |                     
            //   8d4d01               | je                  0xbc7
            //   48897308             | movzx               eax, byte ptr [ebp]
            //   894b28               | dec                 esp
            //   488bc7               | lea                 eax, [0xffea6973]

    condition:
        7 of them and filesize < 4772864
}