rule win_ripper_atm_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "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 = { 7471 8b0c85f0974400 f644190480 7463 8d45e0 50 ff3419 }
            // n = 7, score = 100
            //   7471                 | je                  0x73
            //   8b0c85f0974400       | mov                 ecx, dword ptr [eax*4 + 0x4497f0]
            //   f644190480           | test                byte ptr [ecx + ebx + 4], 0x80
            //   7463                 | je                  0x65
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   50                   | push                eax
            //   ff3419               | push                dword ptr [ecx + ebx]

        $sequence_1 = { 8b45e0 ff7010 ffd3 8b45e0 ff7014 ffd3 ff75e0 }
            // n = 7, score = 100
            //   8b45e0               | mov                 eax, dword ptr [ebp - 0x20]
            //   ff7010               | push                dword ptr [eax + 0x10]
            //   ffd3                 | call                ebx
            //   8b45e0               | mov                 eax, dword ptr [ebp - 0x20]
            //   ff7014               | push                dword ptr [eax + 0x14]
            //   ffd3                 | call                ebx
            //   ff75e0               | push                dword ptr [ebp - 0x20]

        $sequence_2 = { 7407 8d5518 3bce 7403 8d55f8 8b12 8913 }
            // n = 7, score = 100
            //   7407                 | je                  9
            //   8d5518               | lea                 edx, [ebp + 0x18]
            //   3bce                 | cmp                 ecx, esi
            //   7403                 | je                  5
            //   8d55f8               | lea                 edx, [ebp - 8]
            //   8b12                 | mov                 edx, dword ptr [edx]
            //   8913                 | mov                 dword ptr [ebx], edx

        $sequence_3 = { c3 55 8bec 8b0d???????? 8b15???????? 8bc1 2bc2 }
            // n = 7, score = 100
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   8b0d????????         |                     
            //   8b15????????         |                     
            //   8bc1                 | mov                 eax, ecx
            //   2bc2                 | sub                 eax, edx

        $sequence_4 = { 85f6 0f8e55ffffff 8b4c2418 ebde 55 8bec 83e4f8 }
            // n = 7, score = 100
            //   85f6                 | test                esi, esi
            //   0f8e55ffffff         | jle                 0xffffff5b
            //   8b4c2418             | mov                 ecx, dword ptr [esp + 0x18]
            //   ebde                 | jmp                 0xffffffe0
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   83e4f8               | and                 esp, 0xfffffff8

        $sequence_5 = { 7406 57 e8???????? 015e04 eb2b 3b4e08 7508 }
            // n = 7, score = 100
            //   7406                 | je                  8
            //   57                   | push                edi
            //   e8????????           |                     
            //   015e04               | add                 dword ptr [esi + 4], ebx
            //   eb2b                 | jmp                 0x2d
            //   3b4e08               | cmp                 ecx, dword ptr [esi + 8]
            //   7508                 | jne                 0xa

        $sequence_6 = { e8???????? 8906 8b5508 8b0a 890e 8902 8b4204 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8906                 | mov                 dword ptr [esi], eax
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   8b0a                 | mov                 ecx, dword ptr [edx]
            //   890e                 | mov                 dword ptr [esi], ecx
            //   8902                 | mov                 dword ptr [edx], eax
            //   8b4204               | mov                 eax, dword ptr [edx + 4]

        $sequence_7 = { 57 e8???????? 8b4304 8b0b 8945fc }
            // n = 5, score = 100
            //   57                   | push                edi
            //   e8????????           |                     
            //   8b4304               | mov                 eax, dword ptr [ebx + 4]
            //   8b0b                 | mov                 ecx, dword ptr [ebx]
            //   8945fc               | mov                 dword ptr [ebp - 4], eax

        $sequence_8 = { 56 8d45d0 50 e8???????? 8b75d0 8d4dd4 }
            // n = 6, score = 100
            //   56                   | push                esi
            //   8d45d0               | lea                 eax, [ebp - 0x30]
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b75d0               | mov                 esi, dword ptr [ebp - 0x30]
            //   8d4dd4               | lea                 ecx, [ebp - 0x2c]

        $sequence_9 = { 8d45e0 43 eb13 6a02 c745dc0f000000 8955d8 }
            // n = 6, score = 100
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   43                   | inc                 ebx
            //   eb13                 | jmp                 0x15
            //   6a02                 | push                2
            //   c745dc0f000000       | mov                 dword ptr [ebp - 0x24], 0xf
            //   8955d8               | mov                 dword ptr [ebp - 0x28], edx

    condition:
        7 of them and filesize < 724992
}