rule win_http_troy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.http_troy."
        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.http_troy"
        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 = { 85c0 57 741b e8???????? 83c404 68c0d40100 }
            // n = 6, score = 200
            //   85c0                 | test                eax, eax
            //   57                   | push                edi
            //   741b                 | je                  0x1d
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   68c0d40100           | push                0x1d4c0

        $sequence_1 = { 83c404 50 57 ffd6 a3???????? 68???????? }
            // n = 6, score = 200
            //   83c404               | add                 esp, 4
            //   50                   | push                eax
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   a3????????           |                     
            //   68????????           |                     

        $sequence_2 = { 8d8c2434030000 6800040000 51 e8???????? 8d84243c030000 83c40c 8d5001 }
            // n = 7, score = 200
            //   8d8c2434030000       | lea                 ecx, [esp + 0x334]
            //   6800040000           | push                0x400
            //   51                   | push                ecx
            //   e8????????           |                     
            //   8d84243c030000       | lea                 eax, [esp + 0x33c]
            //   83c40c               | add                 esp, 0xc
            //   8d5001               | lea                 edx, [eax + 1]

        $sequence_3 = { dd5df0 dd45f0 eb20 8b4d0c dd01 dc1d???????? dd05???????? }
            // n = 7, score = 200
            //   dd5df0               | fstp                qword ptr [ebp - 0x10]
            //   dd45f0               | fld                 qword ptr [ebp - 0x10]
            //   eb20                 | jmp                 0x22
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   dd01                 | fld                 qword ptr [ecx]
            //   dc1d????????         |                     
            //   dd05????????         |                     

        $sequence_4 = { 0fa2 8945e0 895dec 8955f0 894df4 }
            // n = 5, score = 200
            //   0fa2                 | cpuid               
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   895dec               | mov                 dword ptr [ebp - 0x14], ebx
            //   8955f0               | mov                 dword ptr [ebp - 0x10], edx
            //   894df4               | mov                 dword ptr [ebp - 0xc], ecx

        $sequence_5 = { e8???????? 8b8c24ec140000 83c410 b864000000 e8???????? 5f 5e }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8b8c24ec140000       | mov                 ecx, dword ptr [esp + 0x14ec]
            //   83c410               | add                 esp, 0x10
            //   b864000000           | mov                 eax, 0x64
            //   e8????????           |                     
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi

        $sequence_6 = { 75cd eb06 46 89748c1c 41 894c240c 8b442414 }
            // n = 7, score = 200
            //   75cd                 | jne                 0xffffffcf
            //   eb06                 | jmp                 8
            //   46                   | inc                 esi
            //   89748c1c             | mov                 dword ptr [esp + ecx*4 + 0x1c], esi
            //   41                   | inc                 ecx
            //   894c240c             | mov                 dword ptr [esp + 0xc], ecx
            //   8b442414             | mov                 eax, dword ptr [esp + 0x14]

        $sequence_7 = { 6a00 6840004804 6a00 6a00 6a00 51 68???????? }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   6840004804           | push                0x4480040
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   51                   | push                ecx
            //   68????????           |                     

        $sequence_8 = { 8b4518 0f8b89000000 dd05???????? 33f6 46 e9???????? 394d14 }
            // n = 7, score = 200
            //   8b4518               | mov                 eax, dword ptr [ebp + 0x18]
            //   0f8b89000000         | jnp                 0x8f
            //   dd05????????         |                     
            //   33f6                 | xor                 esi, esi
            //   46                   | inc                 esi
            //   e9????????           |                     
            //   394d14               | cmp                 dword ptr [ebp + 0x14], ecx

        $sequence_9 = { c3 8b8c244c080000 33c0 e8???????? 5f 5e 5b }
            // n = 7, score = 200
            //   c3                   | ret                 
            //   8b8c244c080000       | mov                 ecx, dword ptr [esp + 0x84c]
            //   33c0                 | xor                 eax, eax
            //   e8????????           |                     
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx

    condition:
        7 of them and filesize < 475136
}