rule win_ripper_atm_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.ripper_atm."
        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.ripper_atm"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { 2b14c518c54200 7413 85d2 7905 8d70ff eb03 8d4801 }
            // n = 7, score = 100
            //   2b14c518c54200       | sub                 edx, dword ptr [eax*8 + 0x42c518]
            //   7413                 | je                  0x15
            //   85d2                 | test                edx, edx
            //   7905                 | jns                 7
            //   8d70ff               | lea                 esi, [eax - 1]
            //   eb03                 | jmp                 5
            //   8d4801               | lea                 ecx, [eax + 1]

        $sequence_1 = { 89580c 8d4118 894c240c 3910 7410 8b30 }
            // n = 6, score = 100
            //   89580c               | mov                 dword ptr [eax + 0xc], ebx
            //   8d4118               | lea                 eax, [ecx + 0x18]
            //   894c240c             | mov                 dword ptr [esp + 0xc], ecx
            //   3910                 | cmp                 dword ptr [eax], edx
            //   7410                 | je                  0x12
            //   8b30                 | mov                 esi, dword ptr [eax]

        $sequence_2 = { 8b06 6a00 8b4804 6a04 03ce e8???????? 8d4c240c }
            // n = 7, score = 100
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   6a00                 | push                0
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]
            //   6a04                 | push                4
            //   03ce                 | add                 ecx, esi
            //   e8????????           |                     
            //   8d4c240c             | lea                 ecx, [esp + 0xc]

        $sequence_3 = { 8b3485f0974400 83e11f c1e106 8985ecefffff 8a440e24 02c0 d0f8 }
            // n = 7, score = 100
            //   8b3485f0974400       | mov                 esi, dword ptr [eax*4 + 0x4497f0]
            //   83e11f               | and                 ecx, 0x1f
            //   c1e106               | shl                 ecx, 6
            //   8985ecefffff         | mov                 dword ptr [ebp - 0x1014], eax
            //   8a440e24             | mov                 al, byte ptr [esi + ecx + 0x24]
            //   02c0                 | add                 al, al
            //   d0f8                 | sar                 al, 1

        $sequence_4 = { 8b0495f0974400 6a00 ff74082c ff740828 53 e8???????? 8bf8 }
            // n = 7, score = 100
            //   8b0495f0974400       | mov                 eax, dword ptr [edx*4 + 0x4497f0]
            //   6a00                 | push                0
            //   ff74082c             | push                dword ptr [eax + ecx + 0x2c]
            //   ff740828             | push                dword ptr [eax + ecx + 0x28]
            //   53                   | push                ebx
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax

        $sequence_5 = { 8b8248080000 8b8a4c080000 8945ee 8d45e0 50 ff35???????? 33f6 }
            // n = 7, score = 100
            //   8b8248080000         | mov                 eax, dword ptr [edx + 0x848]
            //   8b8a4c080000         | mov                 ecx, dword ptr [edx + 0x84c]
            //   8945ee               | mov                 dword ptr [ebp - 0x12], eax
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   50                   | push                eax
            //   ff35????????         |                     
            //   33f6                 | xor                 esi, esi

        $sequence_6 = { 7407 8d5518 3bf7 7403 8d55f8 8b12 8913 }
            // n = 7, score = 100
            //   7407                 | je                  9
            //   8d5518               | lea                 edx, [ebp + 0x18]
            //   3bf7                 | cmp                 esi, edi
            //   7403                 | je                  5
            //   8d55f8               | lea                 edx, [ebp - 8]
            //   8b12                 | mov                 edx, dword ptr [edx]
            //   8913                 | mov                 dword ptr [ebx], edx

        $sequence_7 = { 8bc2 c1f805 83e21f 8b0c85f0974400 c1e206 8a441124 3245fe }
            // n = 7, score = 100
            //   8bc2                 | mov                 eax, edx
            //   c1f805               | sar                 eax, 5
            //   83e21f               | and                 edx, 0x1f
            //   8b0c85f0974400       | mov                 ecx, dword ptr [eax*4 + 0x4497f0]
            //   c1e206               | shl                 edx, 6
            //   8a441124             | mov                 al, byte ptr [ecx + edx + 0x24]
            //   3245fe               | xor                 al, byte ptr [ebp - 2]

        $sequence_8 = { 7418 52 ff7514 8a551c ff7510 8d4d18 57 }
            // n = 7, score = 100
            //   7418                 | je                  0x1a
            //   52                   | push                edx
            //   ff7514               | push                dword ptr [ebp + 0x14]
            //   8a551c               | mov                 dl, byte ptr [ebp + 0x1c]
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   8d4d18               | lea                 ecx, [ebp + 0x18]
            //   57                   | push                edi

        $sequence_9 = { 8b4508 8364246800 ff7014 8bcf e8???????? }
            // n = 5, score = 100
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8364246800           | and                 dword ptr [esp + 0x68], 0
            //   ff7014               | push                dword ptr [eax + 0x14]
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     

    condition:
        7 of them and filesize < 724992
}