rule win_rokrat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.rokrat."
        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.rokrat"
        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 e8???????? 6a04 33c0 }
            // n = 4, score = 700
            //   50                   | push                eax
            //   e8????????           |                     
            //   6a04                 | push                4
            //   33c0                 | xor                 eax, eax

        $sequence_1 = { 56 50 8d45f4 64a300000000 c745fc00000000 33c0 }
            // n = 6, score = 700
            //   56                   | push                esi
            //   50                   | push                eax
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   64a300000000         | mov                 dword ptr fs:[0], eax
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   33c0                 | xor                 eax, eax

        $sequence_2 = { 50 e8???????? 8d8e0c010000 8d4550 3bc8 }
            // n = 5, score = 700
            //   50                   | push                eax
            //   e8????????           |                     
            //   8d8e0c010000         | lea                 ecx, [esi + 0x10c]
            //   8d4550               | lea                 eax, [ebp + 0x50]
            //   3bc8                 | cmp                 ecx, eax

        $sequence_3 = { 0fb7c1 50 0fb74208 c1e910 }
            // n = 4, score = 700
            //   0fb7c1               | movzx               eax, cx
            //   50                   | push                eax
            //   0fb74208             | movzx               eax, word ptr [edx + 8]
            //   c1e910               | shr                 ecx, 0x10

        $sequence_4 = { 8ad0 8d4dd8 e8???????? c745fc06000000 }
            // n = 4, score = 700
            //   8ad0                 | mov                 dl, al
            //   8d4dd8               | lea                 ecx, [ebp - 0x28]
            //   e8????????           |                     
            //   c745fc06000000       | mov                 dword ptr [ebp - 4], 6

        $sequence_5 = { 56 8d4dc0 c745d000000000 668945c0 e8???????? c645fc03 8b45bc }
            // n = 7, score = 700
            //   56                   | push                esi
            //   8d4dc0               | lea                 ecx, [ebp - 0x40]
            //   c745d000000000       | mov                 dword ptr [ebp - 0x30], 0
            //   668945c0             | mov                 word ptr [ebp - 0x40], ax
            //   e8????????           |                     
            //   c645fc03             | mov                 byte ptr [ebp - 4], 3
            //   8b45bc               | mov                 eax, dword ptr [ebp - 0x44]

        $sequence_6 = { 50 e8???????? 8d4568 8d4e60 }
            // n = 4, score = 700
            //   50                   | push                eax
            //   e8????????           |                     
            //   8d4568               | lea                 eax, [ebp + 0x68]
            //   8d4e60               | lea                 ecx, [esi + 0x60]

        $sequence_7 = { 50 ff15???????? e8???????? 40 }
            // n = 4, score = 700
            //   50                   | push                eax
            //   ff15????????         |                     
            //   e8????????           |                     
            //   40                   | inc                 eax

        $sequence_8 = { 50 e8???????? 6a10 33c0 }
            // n = 4, score = 700
            //   50                   | push                eax
            //   e8????????           |                     
            //   6a10                 | push                0x10
            //   33c0                 | xor                 eax, eax

        $sequence_9 = { ff15???????? 50 e8???????? 59 6a64 }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   6a64                 | push                0x64

        $sequence_10 = { 897dfc e8???????? 68???????? 8d4dd8 }
            // n = 4, score = 200
            //   897dfc               | mov                 dword ptr [ebp - 4], edi
            //   e8????????           |                     
            //   68????????           |                     
            //   8d4dd8               | lea                 ecx, [ebp - 0x28]

        $sequence_11 = { bf???????? c744243401000000 8b4e58 3b8174030000 }
            // n = 4, score = 100
            //   bf????????           |                     
            //   c744243401000000     | mov                 dword ptr [esp + 0x34], 1
            //   8b4e58               | mov                 ecx, dword ptr [esi + 0x58]
            //   3b8174030000         | cmp                 eax, dword ptr [ecx + 0x374]

        $sequence_12 = { bfc0010000 eb0d 33c0 68???????? }
            // n = 4, score = 100
            //   bfc0010000           | mov                 edi, 0x1c0
            //   eb0d                 | jmp                 0xf
            //   33c0                 | xor                 eax, eax
            //   68????????           |                     

        $sequence_13 = { bf???????? 8b4c2424 8d41ff 83f81d 0f87b6030000 0fb680e4664b00 }
            // n = 6, score = 100
            //   bf????????           |                     
            //   8b4c2424             | mov                 ecx, dword ptr [esp + 0x24]
            //   8d41ff               | lea                 eax, [ecx - 1]
            //   83f81d               | cmp                 eax, 0x1d
            //   0f87b6030000         | ja                  0x3bc
            //   0fb680e4664b00       | movzx               eax, byte ptr [eax + 0x4b66e4]

        $sequence_14 = { bf???????? c7442410102c5000 7504 897c2410 }
            // n = 4, score = 100
            //   bf????????           |                     
            //   c7442410102c5000     | mov                 dword ptr [esp + 0x10], 0x502c10
            //   7504                 | jne                 6
            //   897c2410             | mov                 dword ptr [esp + 0x10], edi

        $sequence_15 = { bf???????? 833cf56c4c540001 751e 8d04f5684c5400 8938 68a00f0000 }
            // n = 6, score = 100
            //   bf????????           |                     
            //   833cf56c4c540001     | cmp                 dword ptr [esi*8 + 0x544c6c], 1
            //   751e                 | jne                 0x20
            //   8d04f5684c5400       | lea                 eax, [esi*8 + 0x544c68]
            //   8938                 | mov                 dword ptr [eax], edi
            //   68a00f0000           | push                0xfa0

    condition:
        7 of them and filesize < 2932736
}