rule win_poldat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.poldat."
        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.poldat"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 89beb4070000 e8???????? 53 8d86b6090000 57 50 e8???????? }
            // n = 7, score = 100
            //   89beb4070000         | mov                 dword ptr [esi + 0x7b4], edi
            //   e8????????           |                     
            //   53                   | push                ebx
            //   8d86b6090000         | lea                 eax, [esi + 0x9b6]
            //   57                   | push                edi
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_1 = { 56 8975fc e8???????? 8d4dfc 8945f8 }
            // n = 5, score = 100
            //   56                   | push                esi
            //   8975fc               | mov                 dword ptr [ebp - 4], esi
            //   e8????????           |                     
            //   8d4dfc               | lea                 ecx, [ebp - 4]
            //   8945f8               | mov                 dword ptr [ebp - 8], eax

        $sequence_2 = { 03ce 8988b4160000 8b149d00934100 85d2 0f8484000000 }
            // n = 5, score = 100
            //   03ce                 | add                 ecx, esi
            //   8988b4160000         | mov                 dword ptr [eax + 0x16b4], ecx
            //   8b149d00934100       | mov                 edx, dword ptr [ebx*4 + 0x419300]
            //   85d2                 | test                edx, edx
            //   0f8484000000         | je                  0x8a

        $sequence_3 = { 50 8d45fc 50 8d45c0 56 50 8d8598fbffff }
            // n = 7, score = 100
            //   50                   | push                eax
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   8d45c0               | lea                 eax, [ebp - 0x40]
            //   56                   | push                esi
            //   50                   | push                eax
            //   8d8598fbffff         | lea                 eax, [ebp - 0x468]

        $sequence_4 = { 7514 8d85acfdffff 50 56 }
            // n = 4, score = 100
            //   7514                 | jne                 0x16
            //   8d85acfdffff         | lea                 eax, [ebp - 0x254]
            //   50                   | push                eax
            //   56                   | push                esi

        $sequence_5 = { 894c241c 8b4c242c 8b0c8d68c34100 894c2420 83f814 7323 8b4c2410 }
            // n = 7, score = 100
            //   894c241c             | mov                 dword ptr [esp + 0x1c], ecx
            //   8b4c242c             | mov                 ecx, dword ptr [esp + 0x2c]
            //   8b0c8d68c34100       | mov                 ecx, dword ptr [ecx*4 + 0x41c368]
            //   894c2420             | mov                 dword ptr [esp + 0x20], ecx
            //   83f814               | cmp                 eax, 0x14
            //   7323                 | jae                 0x25
            //   8b4c2410             | mov                 ecx, dword ptr [esp + 0x10]

        $sequence_6 = { 41 3be8 894c2410 72c5 8b048568c34100 }
            // n = 5, score = 100
            //   41                   | inc                 ecx
            //   3be8                 | cmp                 ebp, eax
            //   894c2410             | mov                 dword ptr [esp + 0x10], ecx
            //   72c5                 | jb                  0xffffffc7
            //   8b048568c34100       | mov                 eax, dword ptr [eax*4 + 0x41c368]

        $sequence_7 = { c645e465 c645e578 c645e665 c645e720 c645e822 c645e925 }
            // n = 6, score = 100
            //   c645e465             | mov                 byte ptr [ebp - 0x1c], 0x65
            //   c645e578             | mov                 byte ptr [ebp - 0x1b], 0x78
            //   c645e665             | mov                 byte ptr [ebp - 0x1a], 0x65
            //   c645e720             | mov                 byte ptr [ebp - 0x19], 0x20
            //   c645e822             | mov                 byte ptr [ebp - 0x18], 0x22
            //   c645e925             | mov                 byte ptr [ebp - 0x17], 0x25

        $sequence_8 = { 8d859cf9ffff 57 50 e8???????? }
            // n = 4, score = 100
            //   8d859cf9ffff         | lea                 eax, [ebp - 0x664]
            //   57                   | push                edi
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_9 = { 8945f8 51 50 8d4510 56 50 }
            // n = 6, score = 100
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   51                   | push                ecx
            //   50                   | push                eax
            //   8d4510               | lea                 eax, [ebp + 0x10]
            //   56                   | push                esi
            //   50                   | push                eax

    condition:
        7 of them and filesize < 247808
}