rule win_babuk_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.babuk."
        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.babuk"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 ff15???????? 83f803 7502 }
            // n = 4, score = 800
            //   50                   | push                eax
            //   ff15????????         |                     
            //   83f803               | cmp                 eax, 3
            //   7502                 | jne                 4

        $sequence_1 = { ff15???????? 6800000100 e8???????? 83c404 }
            // n = 4, score = 800
            //   ff15????????         |                     
            //   6800000100           | push                0x10000
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

        $sequence_2 = { 8945fc 837dfc0a 0f83dc000000 8b4dfc 8b5508 }
            // n = 5, score = 600
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   837dfc0a             | cmp                 dword ptr [ebp - 4], 0xa
            //   0f83dc000000         | jae                 0xe2
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]

        $sequence_3 = { b908000000 6bf100 8b45ec 8b55f0 b11a }
            // n = 5, score = 600
            //   b908000000           | mov                 ecx, 8
            //   6bf100               | imul                esi, ecx, 0
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]
            //   8b55f0               | mov                 edx, dword ptr [ebp - 0x10]
            //   b11a                 | mov                 cl, 0x1a

        $sequence_4 = { 8b5508 c7040a00000000 c7440a0400000000 c745fc00000000 eb09 8b45fc }
            // n = 6, score = 600
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   c7040a00000000       | mov                 dword ptr [edx + ecx], 0
            //   c7440a0400000000     | mov                 dword ptr [edx + ecx + 4], 0
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   eb09                 | jmp                 0xb
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]

        $sequence_5 = { 8b4508 0fb60c08 0bd1 8955fc 8b45fc }
            // n = 5, score = 600
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   0fb60c08             | movzx               ecx, byte ptr [eax + ecx]
            //   0bd1                 | or                  edx, ecx
            //   8955fc               | mov                 dword ptr [ebp - 4], edx
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]

        $sequence_6 = { 6bc200 8b4d08 8b540104 52 8b0401 }
            // n = 5, score = 600
            //   6bc200               | imul                eax, edx, 0
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   8b540104             | mov                 edx, dword ptr [ecx + eax + 4]
            //   52                   | push                edx
            //   8b0401               | mov                 eax, dword ptr [ecx + eax]

        $sequence_7 = { 8b8d74ffffff 83c140 898d74ffffff 8b9574ffffff }
            // n = 4, score = 600
            //   8b8d74ffffff         | mov                 ecx, dword ptr [ebp - 0x8c]
            //   83c140               | add                 ecx, 0x40
            //   898d74ffffff         | mov                 dword ptr [ebp - 0x8c], ecx
            //   8b9574ffffff         | mov                 edx, dword ptr [ebp - 0x8c]

        $sequence_8 = { 8b0cca 51 e8???????? 83c408 8945f4 8955f8 8b45f4 }
            // n = 7, score = 600
            //   8b0cca               | mov                 ecx, dword ptr [edx + ecx*8]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   8955f8               | mov                 dword ptr [ebp - 8], edx
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]

        $sequence_9 = { 8b45b8 83e802 8945b8 837db800 0f8ea5000000 6a0c 6a08 }
            // n = 7, score = 600
            //   8b45b8               | mov                 eax, dword ptr [ebp - 0x48]
            //   83e802               | sub                 eax, 2
            //   8945b8               | mov                 dword ptr [ebp - 0x48], eax
            //   837db800             | cmp                 dword ptr [ebp - 0x48], 0
            //   0f8ea5000000         | jle                 0xab
            //   6a0c                 | push                0xc
            //   6a08                 | push                8

        $sequence_10 = { 8b55fc 8b4d08 89449110 ebd3 ba04000000 }
            // n = 5, score = 600
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   89449110             | mov                 dword ptr [ecx + edx*4 + 0x10], eax
            //   ebd3                 | jmp                 0xffffffd5
            //   ba04000000           | mov                 edx, 4

        $sequence_11 = { 6a0b 6a07 6a03 8d4dbc 51 }
            // n = 5, score = 600
            //   6a0b                 | push                0xb
            //   6a07                 | push                7
            //   6a03                 | push                3
            //   8d4dbc               | lea                 ecx, [ebp - 0x44]
            //   51                   | push                ecx

        $sequence_12 = { ff15???????? 8d4dac 51 6a24 8d55b0 }
            // n = 5, score = 600
            //   ff15????????         |                     
            //   8d4dac               | lea                 ecx, [ebp - 0x54]
            //   51                   | push                ecx
            //   6a24                 | push                0x24
            //   8d55b0               | lea                 edx, [ebp - 0x50]

        $sequence_13 = { 8b4dfc 8b5508 8b44ca04 50 8b0cca 51 }
            // n = 6, score = 600
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   8b44ca04             | mov                 eax, dword ptr [edx + ecx*8 + 4]
            //   50                   | push                eax
            //   8b0cca               | mov                 ecx, dword ptr [edx + ecx*8]
            //   51                   | push                ecx

        $sequence_14 = { 50 e8???????? 83c408 8945ec 8955f0 b908000000 6bf100 }
            // n = 7, score = 600
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8945ec               | mov                 dword ptr [ebp - 0x14], eax
            //   8955f0               | mov                 dword ptr [ebp - 0x10], edx
            //   b908000000           | mov                 ecx, 8
            //   6bf100               | imul                esi, ecx, 0

        $sequence_15 = { 6bc20a 8b4d08 c7040100000000 c744010400000000 ba08000000 }
            // n = 5, score = 600
            //   6bc20a               | imul                eax, edx, 0xa
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   c7040100000000       | mov                 dword ptr [ecx + eax], 0
            //   c744010400000000     | mov                 dword ptr [ecx + eax + 4], 0
            //   ba08000000           | mov                 edx, 8

    condition:
        7 of them and filesize < 183296
}