rule win_svcready_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.svcready."
        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.svcready"
        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 = { 8365fc00 8b7508 3b750c 7411 0fb606 50 8bcf }
            // n = 7, score = 500
            //   8365fc00             | and                 dword ptr [ebp - 4], 0
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   3b750c               | cmp                 esi, dword ptr [ebp + 0xc]
            //   7411                 | je                  0x13
            //   0fb606               | movzx               eax, byte ptr [esi]
            //   50                   | push                eax
            //   8bcf                 | mov                 ecx, edi

        $sequence_1 = { 51 e8???????? 83c408 8b7508 8d4514 }
            // n = 5, score = 500
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   8d4514               | lea                 eax, [ebp + 0x14]

        $sequence_2 = { 8bce e8???????? 014610 115e14 8b4710 }
            // n = 5, score = 500
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   014610               | add                 dword ptr [esi + 0x10], eax
            //   115e14               | adc                 dword ptr [esi + 0x14], ebx
            //   8b4710               | mov                 eax, dword ptr [edi + 0x10]

        $sequence_3 = { 8b0438 03c7 ffd0 0faf45dc 50 e8???????? }
            // n = 6, score = 500
            //   8b0438               | mov                 eax, dword ptr [eax + edi]
            //   03c7                 | add                 eax, edi
            //   ffd0                 | call                eax
            //   0faf45dc             | imul                eax, dword ptr [ebp - 0x24]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_4 = { 894c2410 8be9 c1ce03 33d7 89742414 8bc6 }
            // n = 6, score = 500
            //   894c2410             | mov                 dword ptr [esp + 0x10], ecx
            //   8be9                 | mov                 ebp, ecx
            //   c1ce03               | ror                 esi, 3
            //   33d7                 | xor                 edx, edi
            //   89742414             | mov                 dword ptr [esp + 0x14], esi
            //   8bc6                 | mov                 eax, esi

        $sequence_5 = { 8b4dd8 85c9 741a 8b45e0 2bc1 83e0fc 50 }
            // n = 7, score = 500
            //   8b4dd8               | mov                 ecx, dword ptr [ebp - 0x28]
            //   85c9                 | test                ecx, ecx
            //   741a                 | je                  0x1c
            //   8b45e0               | mov                 eax, dword ptr [ebp - 0x20]
            //   2bc1                 | sub                 eax, ecx
            //   83e0fc               | and                 eax, 0xfffffffc
            //   50                   | push                eax

        $sequence_6 = { c645fc01 8d45d8 ff7508 53 6a10 83ec18 8bcc }
            // n = 7, score = 500
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1
            //   8d45d8               | lea                 eax, [ebp - 0x28]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   53                   | push                ebx
            //   6a10                 | push                0x10
            //   83ec18               | sub                 esp, 0x18
            //   8bcc                 | mov                 ecx, esp

        $sequence_7 = { 7449 57 e8???????? 6a05 5f 3bc7 7239 }
            // n = 7, score = 500
            //   7449                 | je                  0x4b
            //   57                   | push                edi
            //   e8????????           |                     
            //   6a05                 | push                5
            //   5f                   | pop                 edi
            //   3bc7                 | cmp                 eax, edi
            //   7239                 | jb                  0x3b

        $sequence_8 = { 5f 5e 5b c9 c21400 51 ff750c }
            // n = 7, score = 500
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   c9                   | leave               
            //   c21400               | ret                 0x14
            //   51                   | push                ecx
            //   ff750c               | push                dword ptr [ebp + 0xc]

        $sequence_9 = { 8b5c2414 8b742410 6a0b 59 0fb6440c1c 0fa4f308 99 }
            // n = 7, score = 500
            //   8b5c2414             | mov                 ebx, dword ptr [esp + 0x14]
            //   8b742410             | mov                 esi, dword ptr [esp + 0x10]
            //   6a0b                 | push                0xb
            //   59                   | pop                 ecx
            //   0fb6440c1c           | movzx               eax, byte ptr [esp + ecx + 0x1c]
            //   0fa4f308             | shld                ebx, esi, 8
            //   99                   | cdq                 

    condition:
        7 of them and filesize < 1187840
}

rule win_svcready_w0 { 
   meta: 
        author = "@AndreGironda"
        description = "packed SVCReady / win.svcready"
        hash = "76d69ec491c0711f6cc60fbafcabf095"
        date = "June 8, 2022"
        tlp = "White"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.svcready"
        malpedia_rule_date = "20220608"
        malpedia_hash = ""
        malpedia_version = "20220609"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

   strings:
        $hex_1003b3e0 = { 52 75 6e 50 45 44 6c 6c 4e 61 74 69 76 65 3a 3a 46 69 6c 65 20 68 61 73 20 6e 6f 20 72 65 6c 6f 63 61 74 69 6f 6e }
        $hex_1003b424 = { 50 61 79 6c 6f 61 64 20 64 65 70 6c 6f 79 6d 65 6e 74 20 66 61 69 6c 65 64 2c 20 73 74 6f 70 70 69 6e 67 }
        $hex_1003c234 = { 4e 6f 74 20 73 75 70 70 6f 72 74 65 64 20 72 65 6c 6f 63 61 74 69 6f 6e 73 20 66 6f 72 6d 61 74 20 61 74 20 25 64 3a 20 25 64 0a 00 5b 2d 5d 20 }
        $hex_1003c2cc = { 49 6e 76 61 6c 69 64 20 61 64 64 72 65 73 73 20 6f 66 20 72 65 6c 6f 63 61 74 69 6f 6e 73 20 62 6c 6f 63 6b }

   condition:
        all of them
}