rule win_molerat_loader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.molerat_loader."
        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.molerat_loader"
        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 = { 50 8b4204 ffd0 c645fc0a 8b45e8 83c0f0 }
            // n = 6, score = 100
            //   50                   | push                eax
            //   8b4204               | mov                 eax, dword ptr [edx + 4]
            //   ffd0                 | call                eax
            //   c645fc0a             | mov                 byte ptr [ebp - 4], 0xa
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   83c0f0               | add                 eax, -0x10

        $sequence_1 = { ff15???????? 5d c20400 c20400 6a00 }
            // n = 5, score = 100
            //   ff15????????         |                     
            //   5d                   | pop                 ebp
            //   c20400               | ret                 4
            //   c20400               | ret                 4
            //   6a00                 | push                0

        $sequence_2 = { 8b4204 ffd0 837de401 7f05 e8???????? 8b45e0 }
            // n = 6, score = 100
            //   8b4204               | mov                 eax, dword ptr [edx + 4]
            //   ffd0                 | call                eax
            //   837de401             | cmp                 dword ptr [ebp - 0x1c], 1
            //   7f05                 | jg                  7
            //   e8????????           |                     
            //   8b45e0               | mov                 eax, dword ptr [ebp - 0x20]

        $sequence_3 = { 8d5588 52 c645fc18 e8???????? 8b00 8b35???????? }
            // n = 6, score = 100
            //   8d5588               | lea                 edx, [ebp - 0x78]
            //   52                   | push                edx
            //   c645fc18             | mov                 byte ptr [ebp - 4], 0x18
            //   e8????????           |                     
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   8b35????????         |                     

        $sequence_4 = { e8???????? 8b4d58 e8???????? 8d4d28 e8???????? 8d4d08 e9???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8b4d58               | mov                 ecx, dword ptr [ebp + 0x58]
            //   e8????????           |                     
            //   8d4d28               | lea                 ecx, [ebp + 0x28]
            //   e8????????           |                     
            //   8d4d08               | lea                 ecx, [ebp + 8]
            //   e9????????           |                     

        $sequence_5 = { 8bff 55 8bec 8b4508 33c9 3b04cdf03d4400 7413 }
            // n = 7, score = 100
            //   8bff                 | mov                 edi, edi
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   33c9                 | xor                 ecx, ecx
            //   3b04cdf03d4400       | cmp                 eax, dword ptr [ecx*8 + 0x443df0]
            //   7413                 | je                  0x15

        $sequence_6 = { c645fc32 e8???????? 68???????? 8d4db4 c645fc33 e8???????? }
            // n = 6, score = 100
            //   c645fc32             | mov                 byte ptr [ebp - 4], 0x32
            //   e8????????           |                     
            //   68????????           |                     
            //   8d4db4               | lea                 ecx, [ebp - 0x4c]
            //   c645fc33             | mov                 byte ptr [ebp - 4], 0x33
            //   e8????????           |                     

        $sequence_7 = { c645fc08 e8???????? 8b4540 83c0f0 83caff 8d480c }
            // n = 6, score = 100
            //   c645fc08             | mov                 byte ptr [ebp - 4], 8
            //   e8????????           |                     
            //   8b4540               | mov                 eax, dword ptr [ebp + 0x40]
            //   83c0f0               | add                 eax, -0x10
            //   83caff               | or                  edx, 0xffffffff
            //   8d480c               | lea                 ecx, [eax + 0xc]

        $sequence_8 = { 68???????? e8???????? e8???????? 83c404 8d4d00 e8???????? 8b5578 }
            // n = 7, score = 100
            //   68????????           |                     
            //   e8????????           |                     
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8d4d00               | lea                 ecx, [ebp]
            //   e8????????           |                     
            //   8b5578               | mov                 edx, dword ptr [ebp + 0x78]

        $sequence_9 = { 8d4c2410 56 51 e8???????? 83c40c b302 }
            // n = 6, score = 100
            //   8d4c2410             | lea                 ecx, [esp + 0x10]
            //   56                   | push                esi
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   b302                 | mov                 bl, 2

    condition:
        7 of them and filesize < 688128
}