rule win_usbferry_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.usbferry."
        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.usbferry"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { c685abfaffff6b c685acfaffff6b c685adfaffff69 c685aefaffff6c c685affaffff6c }
            // n = 5, score = 200
            //   c685abfaffff6b       | mov                 byte ptr [ebp - 0x555], 0x6b
            //   c685acfaffff6b       | mov                 byte ptr [ebp - 0x554], 0x6b
            //   c685adfaffff69       | mov                 byte ptr [ebp - 0x553], 0x69
            //   c685aefaffff6c       | mov                 byte ptr [ebp - 0x552], 0x6c
            //   c685affaffff6c       | mov                 byte ptr [ebp - 0x551], 0x6c

        $sequence_1 = { 75a5 8b4dfc 8b45f8 8b5718 2bd0 84db }
            // n = 6, score = 200
            //   75a5                 | jne                 0xffffffa7
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   8b5718               | mov                 edx, dword ptr [edi + 0x18]
            //   2bd0                 | sub                 edx, eax
            //   84db                 | test                bl, bl

        $sequence_2 = { 3c2d 7501 42 33c0 eb11 80fb39 }
            // n = 6, score = 200
            //   3c2d                 | cmp                 al, 0x2d
            //   7501                 | jne                 3
            //   42                   | inc                 edx
            //   33c0                 | xor                 eax, eax
            //   eb11                 | jmp                 0x13
            //   80fb39               | cmp                 bl, 0x39

        $sequence_3 = { 83c40c 6a00 6a00 8d8da4f5ffff 51 }
            // n = 5, score = 200
            //   83c40c               | add                 esp, 0xc
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   8d8da4f5ffff         | lea                 ecx, [ebp - 0xa5c]
            //   51                   | push                ecx

        $sequence_4 = { c645ec66 c645ed6c c645ee61 c645ef73 }
            // n = 4, score = 200
            //   c645ec66             | mov                 byte ptr [ebp - 0x14], 0x66
            //   c645ed6c             | mov                 byte ptr [ebp - 0x13], 0x6c
            //   c645ee61             | mov                 byte ptr [ebp - 0x12], 0x61
            //   c645ef73             | mov                 byte ptr [ebp - 0x11], 0x73

        $sequence_5 = { 742c 8b4de0 51 ff15???????? c745c000000000 }
            // n = 5, score = 200
            //   742c                 | je                  0x2e
            //   8b4de0               | mov                 ecx, dword ptr [ebp - 0x20]
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   c745c000000000       | mov                 dword ptr [ebp - 0x40], 0

        $sequence_6 = { 8bc7 5f 99 f7ff }
            // n = 4, score = 200
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi
            //   99                   | cdq                 
            //   f7ff                 | idiv                edi

        $sequence_7 = { 898154010000 8b09 e8???????? 8b0d???????? ff7110 8b9160010000 }
            // n = 6, score = 200
            //   898154010000         | mov                 dword ptr [ecx + 0x154], eax
            //   8b09                 | mov                 ecx, dword ptr [ecx]
            //   e8????????           |                     
            //   8b0d????????         |                     
            //   ff7110               | push                dword ptr [ecx + 0x10]
            //   8b9160010000         | mov                 edx, dword ptr [ecx + 0x160]

        $sequence_8 = { 8b5d08 56 57 8bf9 0fb637 47 8d46bf }
            // n = 7, score = 200
            //   8b5d08               | mov                 ebx, dword ptr [ebp + 8]
            //   56                   | push                esi
            //   57                   | push                edi
            //   8bf9                 | mov                 edi, ecx
            //   0fb637               | movzx               esi, byte ptr [edi]
            //   47                   | inc                 edi
            //   8d46bf               | lea                 eax, [esi - 0x41]

        $sequence_9 = { 8a02 8b742414 84c0 7407 8807 e9???????? }
            // n = 6, score = 200
            //   8a02                 | mov                 al, byte ptr [edx]
            //   8b742414             | mov                 esi, dword ptr [esp + 0x14]
            //   84c0                 | test                al, al
            //   7407                 | je                  9
            //   8807                 | mov                 byte ptr [edi], al
            //   e9????????           |                     

        $sequence_10 = { e8???????? 8b0d???????? 83c440 ff7110 8b91d0000000 }
            // n = 5, score = 200
            //   e8????????           |                     
            //   8b0d????????         |                     
            //   83c440               | add                 esp, 0x40
            //   ff7110               | push                dword ptr [ecx + 0x10]
            //   8b91d0000000         | mov                 edx, dword ptr [ecx + 0xd0]

        $sequence_11 = { ff5060 ff75e0 8b0d???????? ff514c c3 }
            // n = 5, score = 200
            //   ff5060               | call                dword ptr [eax + 0x60]
            //   ff75e0               | push                dword ptr [ebp - 0x20]
            //   8b0d????????         |                     
            //   ff514c               | call                dword ptr [ecx + 0x4c]
            //   c3                   | ret                 

        $sequence_12 = { 6a01 8d85a8faffff 50 e8???????? 83c408 }
            // n = 5, score = 200
            //   6a01                 | push                1
            //   8d85a8faffff         | lea                 eax, [ebp - 0x558]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8

        $sequence_13 = { 85c0 7422 c745d000000000 6afe 8d55f0 52 }
            // n = 6, score = 200
            //   85c0                 | test                eax, eax
            //   7422                 | je                  0x24
            //   c745d000000000       | mov                 dword ptr [ebp - 0x30], 0
            //   6afe                 | push                -2
            //   8d55f0               | lea                 edx, [ebp - 0x10]
            //   52                   | push                edx

        $sequence_14 = { 8b8588f5ffff 89857cf5ffff 899578f5ffff 8d8da8faffff }
            // n = 4, score = 200
            //   8b8588f5ffff         | mov                 eax, dword ptr [ebp - 0xa78]
            //   89857cf5ffff         | mov                 dword ptr [ebp - 0xa84], eax
            //   899578f5ffff         | mov                 dword ptr [ebp - 0xa88], edx
            //   8d8da8faffff         | lea                 ecx, [ebp - 0x558]

        $sequence_15 = { 6a00 8d85f5f7ffff 50 e8???????? 83c40c }
            // n = 5, score = 200
            //   6a00                 | push                0
            //   8d85f5f7ffff         | lea                 eax, [ebp - 0x80b]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

    condition:
        7 of them and filesize < 638976
}