rule win_glassrat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.glassrat."
        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.glassrat"
        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 = { ff15???????? 85c0 7f0e 5f }
            // n = 4, score = 200
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7f0e                 | jg                  0x10
            //   5f                   | pop                 edi

        $sequence_1 = { 7408 6a00 ff15???????? 8b842424010000 8b8c2420010000 8b942418010000 }
            // n = 6, score = 200
            //   7408                 | je                  0xa
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   8b842424010000       | mov                 eax, dword ptr [esp + 0x124]
            //   8b8c2420010000       | mov                 ecx, dword ptr [esp + 0x120]
            //   8b942418010000       | mov                 edx, dword ptr [esp + 0x118]

        $sequence_2 = { 895de0 50 56 ff15???????? }
            // n = 4, score = 200
            //   895de0               | mov                 dword ptr [ebp - 0x20], ebx
            //   50                   | push                eax
            //   56                   | push                esi
            //   ff15????????         |                     

        $sequence_3 = { 68007f0000 53 89442438 ff15???????? 53 89442438 }
            // n = 6, score = 200
            //   68007f0000           | push                0x7f00
            //   53                   | push                ebx
            //   89442438             | mov                 dword ptr [esp + 0x38], eax
            //   ff15????????         |                     
            //   53                   | push                ebx
            //   89442438             | mov                 dword ptr [esp + 0x38], eax

        $sequence_4 = { 8b3d???????? 8d542404 56 52 33f6 ffd7 85c0 }
            // n = 7, score = 200
            //   8b3d????????         |                     
            //   8d542404             | lea                 edx, [esp + 4]
            //   56                   | push                esi
            //   52                   | push                edx
            //   33f6                 | xor                 esi, esi
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax

        $sequence_5 = { 8b45cc 50 51 ff15???????? 8b95c4feffff }
            // n = 5, score = 200
            //   8b45cc               | mov                 eax, dword ptr [ebp - 0x34]
            //   50                   | push                eax
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8b95c4feffff         | mov                 edx, dword ptr [ebp - 0x13c]

        $sequence_6 = { 53 ffd5 8b5e24 8d542410 52 }
            // n = 5, score = 200
            //   53                   | push                ebx
            //   ffd5                 | call                ebp
            //   8b5e24               | mov                 ebx, dword ptr [esi + 0x24]
            //   8d542410             | lea                 edx, [esp + 0x10]
            //   52                   | push                edx

        $sequence_7 = { 8bc8 8b4504 83e103 83f8ff f3a4 741a 6a02 }
            // n = 7, score = 200
            //   8bc8                 | mov                 ecx, eax
            //   8b4504               | mov                 eax, dword ptr [ebp + 4]
            //   83e103               | and                 ecx, 3
            //   83f8ff               | cmp                 eax, -1
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   741a                 | je                  0x1c
            //   6a02                 | push                2

        $sequence_8 = { 8b5e28 8d442410 50 53 ffd7 85c0 7403 }
            // n = 7, score = 200
            //   8b5e28               | mov                 ebx, dword ptr [esi + 0x28]
            //   8d442410             | lea                 eax, [esp + 0x10]
            //   50                   | push                eax
            //   53                   | push                ebx
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax
            //   7403                 | je                  5

        $sequence_9 = { 2bc2 3bc8 b802000000 0f85b4000000 }
            // n = 4, score = 200
            //   2bc2                 | sub                 eax, edx
            //   3bc8                 | cmp                 ecx, eax
            //   b802000000           | mov                 eax, 2
            //   0f85b4000000         | jne                 0xba

    condition:
        7 of them and filesize < 81920
}