rule win_ripper_atm_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 8bec 8b4508 8bd1 eb17 85d2 740a }
            // n = 6, score = 100
            //   8bec                 | mov                 ebp, esp
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8bd1                 | mov                 edx, ecx
            //   eb17                 | jmp                 0x19
            //   85d2                 | test                edx, edx
            //   740a                 | je                  0xc

        $sequence_1 = { 8bc8 894de0 85c9 7465 890c9df0974400 8305????????20 }
            // n = 6, score = 100
            //   8bc8                 | mov                 ecx, eax
            //   894de0               | mov                 dword ptr [ebp - 0x20], ecx
            //   85c9                 | test                ecx, ecx
            //   7465                 | je                  0x67
            //   890c9df0974400       | mov                 dword ptr [ebx*4 + 0x4497f0], ecx
            //   8305????????20       |                     

        $sequence_2 = { 68???????? c645fc01 e8???????? e8???????? 83c418 84c0 }
            // n = 6, score = 100
            //   68????????           |                     
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1
            //   e8????????           |                     
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18
            //   84c0                 | test                al, al

        $sequence_3 = { 8b7df8 8d4624 33db 52 8d4df0 51 8bc8 }
            // n = 7, score = 100
            //   8b7df8               | mov                 edi, dword ptr [ebp - 8]
            //   8d4624               | lea                 eax, [esi + 0x24]
            //   33db                 | xor                 ebx, ebx
            //   52                   | push                edx
            //   8d4df0               | lea                 ecx, [ebp - 0x10]
            //   51                   | push                ecx
            //   8bc8                 | mov                 ecx, eax

        $sequence_4 = { ff15???????? 8bd8 85db 7505 83ceff eb0e }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax
            //   85db                 | test                ebx, ebx
            //   7505                 | jne                 7
            //   83ceff               | or                  esi, 0xffffffff
            //   eb0e                 | jmp                 0x10

        $sequence_5 = { 85ff 7533 807def00 8b45e8 50 8b08 740a }
            // n = 7, score = 100
            //   85ff                 | test                edi, edi
            //   7533                 | jne                 0x35
            //   807def00             | cmp                 byte ptr [ebp - 0x11], 0
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   50                   | push                eax
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   740a                 | je                  0xc

        $sequence_6 = { 8d45ec 50 8bce e8???????? 8b06 015e0c 8365f800 }
            // n = 7, score = 100
            //   8d45ec               | lea                 eax, [ebp - 0x14]
            //   50                   | push                eax
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   015e0c               | add                 dword ptr [esi + 0xc], ebx
            //   8365f800             | and                 dword ptr [ebp - 8], 0

        $sequence_7 = { 8a7d0c 8b7704 8975f4 84db 0f88a2000000 0fbecf 0fbec3 }
            // n = 7, score = 100
            //   8a7d0c               | mov                 bh, byte ptr [ebp + 0xc]
            //   8b7704               | mov                 esi, dword ptr [edi + 4]
            //   8975f4               | mov                 dword ptr [ebp - 0xc], esi
            //   84db                 | test                bl, bl
            //   0f88a2000000         | js                  0xa8
            //   0fbecf               | movsx               ecx, bh
            //   0fbec3               | movsx               eax, bl

        $sequence_8 = { e8???????? 83780407 755d 68???????? 8d8dd8f7ffff e8???????? 83ec18 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83780407             | cmp                 dword ptr [eax + 4], 7
            //   755d                 | jne                 0x5f
            //   68????????           |                     
            //   8d8dd8f7ffff         | lea                 ecx, [ebp - 0x828]
            //   e8????????           |                     
            //   83ec18               | sub                 esp, 0x18

        $sequence_9 = { 8b750c 8b5510 3b37 7512 8b02 3b4610 0f8da7000000 }
            // n = 7, score = 100
            //   8b750c               | mov                 esi, dword ptr [ebp + 0xc]
            //   8b5510               | mov                 edx, dword ptr [ebp + 0x10]
            //   3b37                 | cmp                 esi, dword ptr [edi]
            //   7512                 | jne                 0x14
            //   8b02                 | mov                 eax, dword ptr [edx]
            //   3b4610               | cmp                 eax, dword ptr [esi + 0x10]
            //   0f8da7000000         | jge                 0xad

    condition:
        7 of them and filesize < 724992
}