rule win_poohmilk_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.poohmilk."
        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.poohmilk"
        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 = { 2bf0 1bf9 018574d2ffff 8b857cd2ffff 118d78d2ffff }
            // n = 5, score = 200
            //   2bf0                 | sub                 esi, eax
            //   1bf9                 | sbb                 edi, ecx
            //   018574d2ffff         | add                 dword ptr [ebp - 0x2d8c], eax
            //   8b857cd2ffff         | mov                 eax, dword ptr [ebp - 0x2d84]
            //   118d78d2ffff         | adc                 dword ptr [ebp - 0x2d88], ecx

        $sequence_1 = { 8b4f28 8b5720 50 51 ffd2 33c0 }
            // n = 6, score = 200
            //   8b4f28               | mov                 ecx, dword ptr [edi + 0x28]
            //   8b5720               | mov                 edx, dword ptr [edi + 0x20]
            //   50                   | push                eax
            //   51                   | push                ecx
            //   ffd2                 | call                edx
            //   33c0                 | xor                 eax, eax

        $sequence_2 = { 898df4efffff 3bc8 0f8217020000 8bbd08f0ffff 33c0 8bd1 03d7 }
            // n = 7, score = 200
            //   898df4efffff         | mov                 dword ptr [ebp - 0x100c], ecx
            //   3bc8                 | cmp                 ecx, eax
            //   0f8217020000         | jb                  0x21d
            //   8bbd08f0ffff         | mov                 edi, dword ptr [ebp - 0xff8]
            //   33c0                 | xor                 eax, eax
            //   8bd1                 | mov                 edx, ecx
            //   03d7                 | add                 edx, edi

        $sequence_3 = { 2b957cd2ffff 89955cd2ffff 8bd6 0bd7 0f85ae000000 8b9570d2ffff }
            // n = 6, score = 200
            //   2b957cd2ffff         | sub                 edx, dword ptr [ebp - 0x2d84]
            //   89955cd2ffff         | mov                 dword ptr [ebp - 0x2da4], edx
            //   8bd6                 | mov                 edx, esi
            //   0bd7                 | or                  edx, edi
            //   0f85ae000000         | jne                 0xb4
            //   8b9570d2ffff         | mov                 edx, dword ptr [ebp - 0x2d90]

        $sequence_4 = { 8b4df8 33cd e8???????? 8be5 5d c3 8db58cfdffff }
            // n = 7, score = 200
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   33cd                 | xor                 ecx, ebp
            //   e8????????           |                     
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   8db58cfdffff         | lea                 esi, [ebp - 0x274]

        $sequence_5 = { ffd7 8d8dc8fbffff 51 8d95ecfdffff 52 ffd7 }
            // n = 6, score = 200
            //   ffd7                 | call                edi
            //   8d8dc8fbffff         | lea                 ecx, [ebp - 0x438]
            //   51                   | push                ecx
            //   8d95ecfdffff         | lea                 edx, [ebp - 0x214]
            //   52                   | push                edx
            //   ffd7                 | call                edi

        $sequence_6 = { 83c410 85c0 751f 8b4f38 8b5130 }
            // n = 5, score = 200
            //   83c410               | add                 esp, 0x10
            //   85c0                 | test                eax, eax
            //   751f                 | jne                 0x21
            //   8b4f38               | mov                 ecx, dword ptr [edi + 0x38]
            //   8b5130               | mov                 edx, dword ptr [ecx + 0x30]

        $sequence_7 = { 51 ffd6 8d542410 52 6808000200 ff15???????? 50 }
            // n = 7, score = 200
            //   51                   | push                ecx
            //   ffd6                 | call                esi
            //   8d542410             | lea                 edx, [esp + 0x10]
            //   52                   | push                edx
            //   6808000200           | push                0x20008
            //   ff15????????         |                     
            //   50                   | push                eax

        $sequence_8 = { 668910 8d85d4f9ffff 6a3e 50 e8???????? 83c408 }
            // n = 6, score = 200
            //   668910               | mov                 word ptr [eax], dx
            //   8d85d4f9ffff         | lea                 eax, [ebp - 0x62c]
            //   6a3e                 | push                0x3e
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8

        $sequence_9 = { 740d 807c012d2f 7506 b801000000 c3 0fb64026 }
            // n = 6, score = 200
            //   740d                 | je                  0xf
            //   807c012d2f           | cmp                 byte ptr [ecx + eax + 0x2d], 0x2f
            //   7506                 | jne                 8
            //   b801000000           | mov                 eax, 1
            //   c3                   | ret                 
            //   0fb64026             | movzx               eax, byte ptr [eax + 0x26]

    condition:
        7 of them and filesize < 245760
}