rule win_green_dispenser_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.green_dispenser."
        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.green_dispenser"
        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 = { 83c1fe 57 03f1 b8???????? bf05000000 0fb648fe 880e }
            // n = 7, score = 100
            //   83c1fe               | add                 ecx, -2
            //   57                   | push                edi
            //   03f1                 | add                 esi, ecx
            //   b8????????           |                     
            //   bf05000000           | mov                 edi, 5
            //   0fb648fe             | movzx               ecx, byte ptr [eax - 2]
            //   880e                 | mov                 byte ptr [esi], cl

        $sequence_1 = { 8b4df0 8b45fc 0375f8 037df4 41 83c404 83c310 }
            // n = 7, score = 100
            //   8b4df0               | mov                 ecx, dword ptr [ebp - 0x10]
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   0375f8               | add                 esi, dword ptr [ebp - 8]
            //   037df4               | add                 edi, dword ptr [ebp - 0xc]
            //   41                   | inc                 ecx
            //   83c404               | add                 esp, 4
            //   83c310               | add                 ebx, 0x10

        $sequence_2 = { 7e07 83ff1a 0f9fc0 40 8b3485f8e34200 8b4304 99 }
            // n = 7, score = 100
            //   7e07                 | jle                 9
            //   83ff1a               | cmp                 edi, 0x1a
            //   0f9fc0               | setg                al
            //   40                   | inc                 eax
            //   8b3485f8e34200       | mov                 esi, dword ptr [eax*4 + 0x42e3f8]
            //   8b4304               | mov                 eax, dword ptr [ebx + 4]
            //   99                   | cdq                 

        $sequence_3 = { f6d2 80e201 32d3 8816 8b55fc 8b5d08 41 }
            // n = 7, score = 100
            //   f6d2                 | not                 dl
            //   80e201               | and                 dl, 1
            //   32d3                 | xor                 dl, bl
            //   8816                 | mov                 byte ptr [esi], dl
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   8b5d08               | mov                 ebx, dword ptr [ebp + 8]
            //   41                   | inc                 ecx

        $sequence_4 = { 6a08 8bf9 e8???????? 8bf0 83c404 85f6 740d }
            // n = 7, score = 100
            //   6a08                 | push                8
            //   8bf9                 | mov                 edi, ecx
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c404               | add                 esp, 4
            //   85f6                 | test                esi, esi
            //   740d                 | je                  0xf

        $sequence_5 = { 8845f9 8d45ec 50 8d45f0 50 6a00 6a00 }
            // n = 7, score = 100
            //   8845f9               | mov                 byte ptr [ebp - 7], al
            //   8d45ec               | lea                 eax, [ebp - 0x14]
            //   50                   | push                eax
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_6 = { 747f 83fb03 7d34 e8???????? c70016000000 8b770c }
            // n = 6, score = 100
            //   747f                 | je                  0x81
            //   83fb03               | cmp                 ebx, 3
            //   7d34                 | jge                 0x36
            //   e8????????           |                     
            //   c70016000000         | mov                 dword ptr [eax], 0x16
            //   8b770c               | mov                 esi, dword ptr [edi + 0xc]

        $sequence_7 = { 740a 48 740a 48 48 7568 40 }
            // n = 7, score = 100
            //   740a                 | je                  0xc
            //   48                   | dec                 eax
            //   740a                 | je                  0xc
            //   48                   | dec                 eax
            //   48                   | dec                 eax
            //   7568                 | jne                 0x6a
            //   40                   | inc                 eax

        $sequence_8 = { 8b048550aa4500 f644180401 7418 ff7514 ff7510 ff750c 57 }
            // n = 7, score = 100
            //   8b048550aa4500       | mov                 eax, dword ptr [eax*4 + 0x45aa50]
            //   f644180401           | test                byte ptr [eax + ebx + 4], 1
            //   7418                 | je                  0x1a
            //   ff7514               | push                dword ptr [ebp + 0x14]
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   57                   | push                edi

        $sequence_9 = { 57 8bf9 6a08 8bda 897dfc e8???????? }
            // n = 6, score = 100
            //   57                   | push                edi
            //   8bf9                 | mov                 edi, ecx
            //   6a08                 | push                8
            //   8bda                 | mov                 ebx, edx
            //   897dfc               | mov                 dword ptr [ebp - 4], edi
            //   e8????????           |                     

    condition:
        7 of them and filesize < 838656
}