rule win_campoloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.campoloader."
        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.campoloader"
        malpedia_rule_date = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 8b4508 0345c8 50 8b4d0c }
            // n = 4, score = 200
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   0345c8               | add                 eax, dword ptr [ebp - 0x38]
            //   50                   | push                eax
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]

        $sequence_1 = { 8945fc c745c800000000 c745c000000000 a1???????? 8945f4 8b0d???????? 894df8 }
            // n = 7, score = 200
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   c745c800000000       | mov                 dword ptr [ebp - 0x38], 0
            //   c745c000000000       | mov                 dword ptr [ebp - 0x40], 0
            //   a1????????           |                     
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   8b0d????????         |                     
            //   894df8               | mov                 dword ptr [ebp - 8], ecx

        $sequence_2 = { 8b8d70efffff 51 8b9584efffff 52 }
            // n = 4, score = 200
            //   8b8d70efffff         | mov                 ecx, dword ptr [ebp - 0x1090]
            //   51                   | push                ecx
            //   8b9584efffff         | mov                 edx, dword ptr [ebp - 0x107c]
            //   52                   | push                edx

        $sequence_3 = { 8d55f4 899580efffff 8b8580efffff 83c001 }
            // n = 4, score = 200
            //   8d55f4               | lea                 edx, dword ptr [ebp - 0xc]
            //   899580efffff         | mov                 dword ptr [ebp - 0x1080], edx
            //   8b8580efffff         | mov                 eax, dword ptr [ebp - 0x1080]
            //   83c001               | add                 eax, 1

        $sequence_4 = { c702bb010000 8d45e8 8945d4 8b4dd4 83c101 894dac 8b55d4 }
            // n = 7, score = 200
            //   c702bb010000         | mov                 dword ptr [edx], 0x1bb
            //   8d45e8               | lea                 eax, dword ptr [ebp - 0x18]
            //   8945d4               | mov                 dword ptr [ebp - 0x2c], eax
            //   8b4dd4               | mov                 ecx, dword ptr [ebp - 0x2c]
            //   83c101               | add                 ecx, 1
            //   894dac               | mov                 dword ptr [ebp - 0x54], ecx
            //   8b55d4               | mov                 edx, dword ptr [ebp - 0x2c]

        $sequence_5 = { 8d4588 50 68???????? 6a00 6a00 6a00 6a00 }
            // n = 7, score = 200
            //   8d4588               | lea                 eax, dword ptr [ebp - 0x78]
            //   50                   | push                eax
            //   68????????           |                     
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_6 = { 8b5508 8955d0 8b45d0 83c001 8945a4 8b4dd0 }
            // n = 6, score = 200
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   8955d0               | mov                 dword ptr [ebp - 0x30], edx
            //   8b45d0               | mov                 eax, dword ptr [ebp - 0x30]
            //   83c001               | add                 eax, 1
            //   8945a4               | mov                 dword ptr [ebp - 0x5c], eax
            //   8b4dd0               | mov                 ecx, dword ptr [ebp - 0x30]

        $sequence_7 = { 50 ff15???????? 837d1001 0f8579010000 c78574efffff00000000 c78578efffff70170000 c78570efffff70170000 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   ff15????????         |                     
            //   837d1001             | cmp                 dword ptr [ebp + 0x10], 1
            //   0f8579010000         | jne                 0x17f
            //   c78574efffff00000000     | mov    dword ptr [ebp - 0x108c], 0
            //   c78578efffff70170000     | mov    dword ptr [ebp - 0x1088], 0x1770
            //   c78570efffff70170000     | mov    dword ptr [ebp - 0x1090], 0x1770

        $sequence_8 = { 8955f8 8b45e4 8945ec 8b4dec 83c101 }
            // n = 5, score = 200
            //   8955f8               | mov                 dword ptr [ebp - 8], edx
            //   8b45e4               | mov                 eax, dword ptr [ebp - 0x1c]
            //   8945ec               | mov                 dword ptr [ebp - 0x14], eax
            //   8b4dec               | mov                 ecx, dword ptr [ebp - 0x14]
            //   83c101               | add                 ecx, 1

        $sequence_9 = { c7458844000000 b907000000 be???????? 8d7ddc f3a5 66a5 }
            // n = 6, score = 200
            //   c7458844000000       | mov                 dword ptr [ebp - 0x78], 0x44
            //   b907000000           | mov                 ecx, 7
            //   be????????           |                     
            //   8d7ddc               | lea                 edi, dword ptr [ebp - 0x24]
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   66a5                 | movsw               word ptr es:[edi], word ptr [esi]

    condition:
        7 of them and filesize < 66560
}