rule win_milum_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.milum."
        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.milum"
        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 = { 89a55cffffff c700???????? c7400402000000 e8???????? 837d3c10 8b4d28 7303 }
            // n = 7, score = 400
            //   89a55cffffff         | mov                 dword ptr [ebp - 0xa4], esp
            //   c700????????         |                     
            //   c7400402000000       | mov                 dword ptr [eax + 4], 2
            //   e8????????           |                     
            //   837d3c10             | cmp                 dword ptr [ebp + 0x3c], 0x10
            //   8b4d28               | mov                 ecx, dword ptr [ebp + 0x28]
            //   7303                 | jae                 5

        $sequence_1 = { 8808 e9???????? 46 8975dc 8b470c 40 3b4710 }
            // n = 7, score = 400
            //   8808                 | mov                 byte ptr [eax], cl
            //   e9????????           |                     
            //   46                   | inc                 esi
            //   8975dc               | mov                 dword ptr [ebp - 0x24], esi
            //   8b470c               | mov                 eax, dword ptr [edi + 0xc]
            //   40                   | inc                 eax
            //   3b4710               | cmp                 eax, dword ptr [edi + 0x10]

        $sequence_2 = { 89a570feffff 6aff 53 8d5508 897114 895910 52 }
            // n = 7, score = 400
            //   89a570feffff         | mov                 dword ptr [ebp - 0x190], esp
            //   6aff                 | push                -1
            //   53                   | push                ebx
            //   8d5508               | lea                 edx, [ebp + 8]
            //   897114               | mov                 dword ptr [ecx + 0x14], esi
            //   895910               | mov                 dword ptr [ecx + 0x10], ebx
            //   52                   | push                edx

        $sequence_3 = { 53 8bc7 e8???????? 5f 5e 5b 8be5 }
            // n = 7, score = 400
            //   53                   | push                ebx
            //   8bc7                 | mov                 eax, edi
            //   e8????????           |                     
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   8be5                 | mov                 esp, ebp

        $sequence_4 = { e8???????? 8b4d80 51 e8???????? 83c410 c645fc01 837de810 }
            // n = 7, score = 400
            //   e8????????           |                     
            //   8b4d80               | mov                 ecx, dword ptr [ebp - 0x80]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1
            //   837de810             | cmp                 dword ptr [ebp - 0x18], 0x10

        $sequence_5 = { 8a07 13f3 ff45e8 8bda 8975d0 3c30 7d96 }
            // n = 7, score = 400
            //   8a07                 | mov                 al, byte ptr [edi]
            //   13f3                 | adc                 esi, ebx
            //   ff45e8               | inc                 dword ptr [ebp - 0x18]
            //   8bda                 | mov                 ebx, edx
            //   8975d0               | mov                 dword ptr [ebp - 0x30], esi
            //   3c30                 | cmp                 al, 0x30
            //   7d96                 | jge                 0xffffff98

        $sequence_6 = { 7513 c745fcffffffff 837d1c10 7265 8b4508 50 eb57 }
            // n = 7, score = 400
            //   7513                 | jne                 0x15
            //   c745fcffffffff       | mov                 dword ptr [ebp - 4], 0xffffffff
            //   837d1c10             | cmp                 dword ptr [ebp + 0x1c], 0x10
            //   7265                 | jb                  0x67
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   50                   | push                eax
            //   eb57                 | jmp                 0x59

        $sequence_7 = { 8818 c785c4feffff7cb44600 c645fc0f 83ec1c }
            // n = 4, score = 400
            //   8818                 | mov                 byte ptr [eax], bl
            //   c785c4feffff7cb44600     | mov    dword ptr [ebp - 0x13c], 0x46b47c
            //   c645fc0f             | mov                 byte ptr [ebp - 4], 0xf
            //   83ec1c               | sub                 esp, 0x1c

        $sequence_8 = { 8b4a04 8d8c0d74faffff 8b410c 83c802 }
            // n = 4, score = 400
            //   8b4a04               | mov                 ecx, dword ptr [edx + 4]
            //   8d8c0d74faffff       | lea                 ecx, [ebp + ecx - 0x58c]
            //   8b410c               | mov                 eax, dword ptr [ecx + 0xc]
            //   83c802               | or                  eax, 2

        $sequence_9 = { c700???????? c745fcffffffff 8d7014 897508 c745fc02000000 837e3810 }
            // n = 6, score = 400
            //   c700????????         |                     
            //   c745fcffffffff       | mov                 dword ptr [ebp - 4], 0xffffffff
            //   8d7014               | lea                 esi, [eax + 0x14]
            //   897508               | mov                 dword ptr [ebp + 8], esi
            //   c745fc02000000       | mov                 dword ptr [ebp - 4], 2
            //   837e3810             | cmp                 dword ptr [esi + 0x38], 0x10

    condition:
        7 of them and filesize < 1076224
}