rule win_boaxxe_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.boaxxe."
        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.boaxxe"
        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 = { 8b4de4 8b55e8 8b45e0 e8???????? 84c0 742e 8b45f0 }
            // n = 7, score = 100
            //   8b4de4               | mov                 ecx, dword ptr [ebp - 0x1c]
            //   8b55e8               | mov                 edx, dword ptr [ebp - 0x18]
            //   8b45e0               | mov                 eax, dword ptr [ebp - 0x20]
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   742e                 | je                  0x30
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]

        $sequence_1 = { 59 e8???????? b808000000 e8???????? 83c005 69c0e8030000 e8???????? }
            // n = 7, score = 100
            //   59                   | pop                 ecx
            //   e8????????           |                     
            //   b808000000           | mov                 eax, 8
            //   e8????????           |                     
            //   83c005               | add                 eax, 5
            //   69c0e8030000         | imul                eax, eax, 0x3e8
            //   e8????????           |                     

        $sequence_2 = { 8b00 ff5020 85c0 0f8517010000 b9???????? ba???????? 8b45f0 }
            // n = 7, score = 100
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   ff5020               | call                dword ptr [eax + 0x20]
            //   85c0                 | test                eax, eax
            //   0f8517010000         | jne                 0x11d
            //   b9????????           |                     
            //   ba????????           |                     
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]

        $sequence_3 = { e8???????? 8d45dc e8???????? 8d45e8 e8???????? 8d45ec e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8d45dc               | lea                 eax, [ebp - 0x24]
            //   e8????????           |                     
            //   8d45e8               | lea                 eax, [ebp - 0x18]
            //   e8????????           |                     
            //   8d45ec               | lea                 eax, [ebp - 0x14]
            //   e8????????           |                     

        $sequence_4 = { 69c0e8030000 50 8b45fc 8b4058 50 e8???????? }
            // n = 6, score = 100
            //   69c0e8030000         | imul                eax, eax, 0x3e8
            //   50                   | push                eax
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8b4058               | mov                 eax, dword ptr [eax + 0x58]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_5 = { e8???????? 89c2 5f 5b c3 51 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   89c2                 | mov                 edx, eax
            //   5f                   | pop                 edi
            //   5b                   | pop                 ebx
            //   c3                   | ret                 
            //   51                   | push                ecx

        $sequence_6 = { 50 8d45dc e8???????? 8bcb 5a e8???????? e9???????? }
            // n = 7, score = 100
            //   50                   | push                eax
            //   8d45dc               | lea                 eax, [ebp - 0x24]
            //   e8????????           |                     
            //   8bcb                 | mov                 ecx, ebx
            //   5a                   | pop                 edx
            //   e8????????           |                     
            //   e9????????           |                     

        $sequence_7 = { e8???????? 85db 746f 895c240c 8b4c240c 890c24 8b0424 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   85db                 | test                ebx, ebx
            //   746f                 | je                  0x71
            //   895c240c             | mov                 dword ptr [esp + 0xc], ebx
            //   8b4c240c             | mov                 ecx, dword ptr [esp + 0xc]
            //   890c24               | mov                 dword ptr [esp], ecx
            //   8b0424               | mov                 eax, dword ptr [esp]

        $sequence_8 = { ff30 68???????? 8d45f8 ba07000000 e8???????? 8d459c 8b55f8 }
            // n = 7, score = 100
            //   ff30                 | push                dword ptr [eax]
            //   68????????           |                     
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   ba07000000           | mov                 edx, 7
            //   e8????????           |                     
            //   8d459c               | lea                 eax, [ebp - 0x64]
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]

        $sequence_9 = { 50 57 e8???????? 83f801 1bc0 40 }
            // n = 6, score = 100
            //   50                   | push                eax
            //   57                   | push                edi
            //   e8????????           |                     
            //   83f801               | cmp                 eax, 1
            //   1bc0                 | sbb                 eax, eax
            //   40                   | inc                 eax

    condition:
        7 of them and filesize < 1146880
}