rule win_dma_locker_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.dma_locker."
        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.dma_locker"
        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 = { 50 8bf9 c745d800000000 ff15???????? 85c0 7465 8b55d8 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   8bf9                 | mov                 edi, ecx
            //   c745d800000000       | mov                 dword ptr [ebp - 0x28], 0
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7465                 | je                  0x67
            //   8b55d8               | mov                 edx, dword ptr [ebp - 0x28]

        $sequence_1 = { 010404 020404 0404 0404 0404 0403 cc }
            // n = 7, score = 200
            //   010404               | add                 dword ptr [esp + eax], eax
            //   020404               | add                 al, byte ptr [esp + eax]
            //   0404                 | add                 al, 4
            //   0404                 | add                 al, 4
            //   0404                 | add                 al, 4
            //   0403                 | add                 al, 3
            //   cc                   | int3                

        $sequence_2 = { ffd7 50 6a00 56 6a37 688a020000 6a65 }
            // n = 7, score = 200
            //   ffd7                 | call                edi
            //   50                   | push                eax
            //   6a00                 | push                0
            //   56                   | push                esi
            //   6a37                 | push                0x37
            //   688a020000           | push                0x28a
            //   6a65                 | push                0x65

        $sequence_3 = { 52 8db42480000000 89842488000000 898c248c000000 e8???????? }
            // n = 5, score = 200
            //   52                   | push                edx
            //   8db42480000000       | lea                 esi, [esp + 0x80]
            //   89842488000000       | mov                 dword ptr [esp + 0x88], eax
            //   898c248c000000       | mov                 dword ptr [esp + 0x8c], ecx
            //   e8????????           |                     

        $sequence_4 = { e8???????? 68ff0f0000 8d8df5edffff 6a00 51 8bf0 c685f4edffff00 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   68ff0f0000           | push                0xfff
            //   8d8df5edffff         | lea                 ecx, [ebp - 0x120b]
            //   6a00                 | push                0
            //   51                   | push                ecx
            //   8bf0                 | mov                 esi, eax
            //   c685f4edffff00       | mov                 byte ptr [ebp - 0x120c], 0

        $sequence_5 = { 85c0 0f8561feffff 57 ff15???????? 8b4dfc 5f 5e }
            // n = 7, score = 200
            //   85c0                 | test                eax, eax
            //   0f8561feffff         | jne                 0xfffffe67
            //   57                   | push                edi
            //   ff15????????         |                     
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi

        $sequence_6 = { 8b742418 6a01 56 e8???????? 8b7620 b967000000 }
            // n = 6, score = 200
            //   8b742418             | mov                 esi, dword ptr [esp + 0x18]
            //   6a01                 | push                1
            //   56                   | push                esi
            //   e8????????           |                     
            //   8b7620               | mov                 esi, dword ptr [esi + 0x20]
            //   b967000000           | mov                 ecx, 0x67

        $sequence_7 = { 50 c785d8fdffff08020000 ff15???????? 85c0 }
            // n = 4, score = 200
            //   50                   | push                eax
            //   c785d8fdffff08020000     | mov    dword ptr [ebp - 0x228], 0x208
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

        $sequence_8 = { ff15???????? 68ffffff00 57 ff15???????? 6a00 ff15???????? e9???????? }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   68ffffff00           | push                0xffffff
            //   57                   | push                edi
            //   ff15????????         |                     
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   e9????????           |                     

        $sequence_9 = { 56 e8???????? 8b5d0c 8b7508 83c40c e8???????? }
            // n = 6, score = 200
            //   56                   | push                esi
            //   e8????????           |                     
            //   8b5d0c               | mov                 ebx, dword ptr [ebp + 0xc]
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   83c40c               | add                 esp, 0xc
            //   e8????????           |                     

    condition:
        7 of them and filesize < 532480
}