rule win_milum_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        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 = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { 390e 7231 57 85c9 7505 8d7910 eb07 }
            // n = 7, score = 400
            //   390e                 | cmp                 dword ptr [esi], ecx
            //   7231                 | jb                  0x33
            //   57                   | push                edi
            //   85c9                 | test                ecx, ecx
            //   7505                 | jne                 7
            //   8d7910               | lea                 edi, [ecx + 0x10]
            //   eb07                 | jmp                 9

        $sequence_1 = { eb05 1bc9 83d9ff 85c9 8b4d08 740b 41 }
            // n = 7, score = 400
            //   eb05                 | jmp                 7
            //   1bc9                 | sbb                 ecx, ecx
            //   83d9ff               | sbb                 ecx, -1
            //   85c9                 | test                ecx, ecx
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   740b                 | je                  0xd
            //   41                   | inc                 ecx

        $sequence_2 = { e8???????? 68ff000000 e8???????? 59 59 8b7508 8d34f5f0824700 }
            // n = 7, score = 400
            //   e8????????           |                     
            //   68ff000000           | push                0xff
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   8d34f5f0824700       | lea                 esi, [esi*8 + 0x4782f0]

        $sequence_3 = { 50 e8???????? 8b4d80 51 e8???????? 83c410 c645fc01 }
            // n = 7, score = 400
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b4d80               | mov                 ecx, dword ptr [ebp - 0x80]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1

        $sequence_4 = { 6a0a 8bf0 6a0a 56 51 e8???????? 8b5594 }
            // n = 7, score = 400
            //   6a0a                 | push                0xa
            //   8bf0                 | mov                 esi, eax
            //   6a0a                 | push                0xa
            //   56                   | push                esi
            //   51                   | push                ecx
            //   e8????????           |                     
            //   8b5594               | mov                 edx, dword ptr [ebp - 0x6c]

        $sequence_5 = { c645fc08 6aff 53 8d5528 52 8d8d64ffffff 89b578ffffff }
            // n = 7, score = 400
            //   c645fc08             | mov                 byte ptr [ebp - 4], 8
            //   6aff                 | push                -1
            //   53                   | push                ebx
            //   8d5528               | lea                 edx, [ebp + 0x28]
            //   52                   | push                edx
            //   8d8d64ffffff         | lea                 ecx, [ebp - 0x9c]
            //   89b578ffffff         | mov                 dword ptr [ebp - 0x88], esi

        $sequence_6 = { 8b9d04ffffff 0f94c0 84c0 742b ba00100000 66855306 8d53f8 }
            // n = 7, score = 400
            //   8b9d04ffffff         | mov                 ebx, dword ptr [ebp - 0xfc]
            //   0f94c0               | sete                al
            //   84c0                 | test                al, al
            //   742b                 | je                  0x2d
            //   ba00100000           | mov                 edx, 0x1000
            //   66855306             | test                word ptr [ebx + 6], dx
            //   8d53f8               | lea                 edx, [ebx - 8]

        $sequence_7 = { 8d8d20ffffff e8???????? c645fc0d c78550ffffff0f000000 89bd4cffffff c6853cffffff00 56 }
            // n = 7, score = 400
            //   8d8d20ffffff         | lea                 ecx, [ebp - 0xe0]
            //   e8????????           |                     
            //   c645fc0d             | mov                 byte ptr [ebp - 4], 0xd
            //   c78550ffffff0f000000     | mov    dword ptr [ebp - 0xb0], 0xf
            //   89bd4cffffff         | mov                 dword ptr [ebp - 0xb4], edi
            //   c6853cffffff00       | mov                 byte ptr [ebp - 0xc4], 0
            //   56                   | push                esi

        $sequence_8 = { ba???????? e8???????? c684246803000014 8b4f10 83c104 51 8d94244c010000 }
            // n = 7, score = 400
            //   ba????????           |                     
            //   e8????????           |                     
            //   c684246803000014     | mov                 byte ptr [esp + 0x368], 0x14
            //   8b4f10               | mov                 ecx, dword ptr [edi + 0x10]
            //   83c104               | add                 ecx, 4
            //   51                   | push                ecx
            //   8d94244c010000       | lea                 edx, [esp + 0x14c]

        $sequence_9 = { 8d8d2cffffff e8???????? 83c61c 56 8bd0 e8???????? c645fc0f }
            // n = 7, score = 400
            //   8d8d2cffffff         | lea                 ecx, [ebp - 0xd4]
            //   e8????????           |                     
            //   83c61c               | add                 esi, 0x1c
            //   56                   | push                esi
            //   8bd0                 | mov                 edx, eax
            //   e8????????           |                     
            //   c645fc0f             | mov                 byte ptr [ebp - 4], 0xf

    condition:
        7 of them and filesize < 1076224
}