rule win_bitter_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        version = "1"
        description = "Detects win.bitter_rat."
        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.bitter_rat"
        malpedia_rule_date = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { f7fb 85d2 740d 8bc6 c1e002 8bb070474500 }
            // n = 6, score = 200
            //   f7fb                 | idiv                ebx
            //   85d2                 | test                edx, edx
            //   740d                 | je                  0xf
            //   8bc6                 | mov                 eax, esi
            //   c1e002               | shl                 eax, 2
            //   8bb070474500         | mov                 esi, dword ptr [eax + 0x454770]

        $sequence_1 = { 52 0fb7851efaffff 50 0fb78d22faffff }
            // n = 4, score = 200
            //   52                   | push                edx
            //   0fb7851efaffff       | movzx               eax, word ptr [ebp - 0x5e2]
            //   50                   | push                eax
            //   0fb78d22faffff       | movzx               ecx, word ptr [ebp - 0x5de]

        $sequence_2 = { 83c408 6a0a 8d8580fcffff 50 8b8d58f0ffff 6bc90c 8bf4 }
            // n = 7, score = 200
            //   83c408               | add                 esp, 8
            //   6a0a                 | push                0xa
            //   8d8580fcffff         | lea                 eax, [ebp - 0x380]
            //   50                   | push                eax
            //   8b8d58f0ffff         | mov                 ecx, dword ptr [ebp - 0xfa8]
            //   6bc90c               | imul                ecx, ecx, 0xc
            //   8bf4                 | mov                 esi, esp

        $sequence_3 = { 68???????? 68???????? ff15???????? 3bf4 e8???????? e8???????? 8bf4 }
            // n = 7, score = 200
            //   68????????           |                     
            //   68????????           |                     
            //   ff15????????         |                     
            //   3bf4                 | cmp                 esi, esp
            //   e8????????           |                     
            //   e8????????           |                     
            //   8bf4                 | mov                 esi, esp

        $sequence_4 = { 83c002 898588fcffff 8d85d8feffff 50 e8???????? }
            // n = 5, score = 200
            //   83c002               | add                 eax, 2
            //   898588fcffff         | mov                 dword ptr [ebp - 0x378], eax
            //   8d85d8feffff         | lea                 eax, [ebp - 0x128]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_5 = { 8b45b8 c64405d800 8d45d8 50 e8???????? 83c404 }
            // n = 6, score = 200
            //   8b45b8               | mov                 eax, dword ptr [ebp - 0x48]
            //   c64405d800           | mov                 byte ptr [ebp + eax - 0x28], 0
            //   8d45d8               | lea                 eax, [ebp - 0x28]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

        $sequence_6 = { c745d800000000 c745dc00000000 8b4508 8945e0 8bf4 }
            // n = 5, score = 200
            //   c745d800000000       | mov                 dword ptr [ebp - 0x28], 0
            //   c745dc00000000       | mov                 dword ptr [ebp - 0x24], 0
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   8bf4                 | mov                 esi, esp

        $sequence_7 = { ff15???????? 3bf4 e8???????? a3???????? e9???????? c745e88c804500 }
            // n = 6, score = 200
            //   ff15????????         |                     
            //   3bf4                 | cmp                 esi, esp
            //   e8????????           |                     
            //   a3????????           |                     
            //   e9????????           |                     
            //   c745e88c804500       | mov                 dword ptr [ebp - 0x18], 0x45808c

        $sequence_8 = { 83c40c c705????????e5070000 8bf4 6a00 6a00 8d45f4 50 }
            // n = 7, score = 200
            //   83c40c               | add                 esp, 0xc
            //   c705????????e5070000     |     
            //   8bf4                 | mov                 esi, esp
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   50                   | push                eax

        $sequence_9 = { e8???????? 83c40c 8d85e0fbffff 50 e8???????? 83c404 }
            // n = 6, score = 200
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8d85e0fbffff         | lea                 eax, [ebp - 0x420]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

    condition:
        7 of them and filesize < 1130496
}