rule win_alma_locker_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.alma_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.alma_locker"
        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 = { ff5108 ff15???????? 837dd008 8d45bc 8d4dd4 }
            // n = 5, score = 100
            //   ff5108               | call                dword ptr [ecx + 8]
            //   ff15????????         |                     
            //   837dd008             | cmp                 dword ptr [ebp - 0x30], 8
            //   8d45bc               | lea                 eax, [ebp - 0x44]
            //   8d4dd4               | lea                 ecx, [ebp - 0x2c]

        $sequence_1 = { 837d8810 6689458c 89459c 720e ffb574ffffff }
            // n = 5, score = 100
            //   837d8810             | cmp                 dword ptr [ebp - 0x78], 0x10
            //   6689458c             | mov                 word ptr [ebp - 0x74], ax
            //   89459c               | mov                 dword ptr [ebp - 0x64], eax
            //   720e                 | jb                  0x10
            //   ffb574ffffff         | push                dword ptr [ebp - 0x8c]

        $sequence_2 = { c645fc14 8d8dd0fbffff e8???????? 83c404 83bd4cfaffff08 720e }
            // n = 6, score = 100
            //   c645fc14             | mov                 byte ptr [ebp - 4], 0x14
            //   8d8dd0fbffff         | lea                 ecx, [ebp - 0x430]
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   83bd4cfaffff08       | cmp                 dword ptr [ebp - 0x5b4], 8
            //   720e                 | jb                  0x10

        $sequence_3 = { 68???????? 8d4d8c e8???????? c645fc03 a1???????? 8b30 }
            // n = 6, score = 100
            //   68????????           |                     
            //   8d4d8c               | lea                 ecx, [ebp - 0x74]
            //   e8????????           |                     
            //   c645fc03             | mov                 byte ptr [ebp - 4], 3
            //   a1????????           |                     
            //   8b30                 | mov                 esi, dword ptr [eax]

        $sequence_4 = { e8???????? 83c404 c645fc06 837d8810 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   c645fc06             | mov                 byte ptr [ebp - 4], 6
            //   837d8810             | cmp                 dword ptr [ebp - 0x78], 0x10

        $sequence_5 = { c78510ffffff07000000 837dd010 668985fcfeffff 89850cffffff 720b ff75bc e8???????? }
            // n = 7, score = 100
            //   c78510ffffff07000000     | mov    dword ptr [ebp - 0xf0], 7
            //   837dd010             | cmp                 dword ptr [ebp - 0x30], 0x10
            //   668985fcfeffff       | mov                 word ptr [ebp - 0x104], ax
            //   89850cffffff         | mov                 dword ptr [ebp - 0xf4], eax
            //   720b                 | jb                  0xd
            //   ff75bc               | push                dword ptr [ebp - 0x44]
            //   e8????????           |                     

        $sequence_6 = { b9???????? c705????????07000000 0f44f8 c705????????00000000 57 68???????? }
            // n = 6, score = 100
            //   b9????????           |                     
            //   c705????????07000000     |     
            //   0f44f8               | cmove               edi, eax
            //   c705????????00000000     |     
            //   57                   | push                edi
            //   68????????           |                     

        $sequence_7 = { e8???????? 83c404 83bd70ffffff08 c645a400 c745b400000000 c745b80f000000 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   83bd70ffffff08       | cmp                 dword ptr [ebp - 0x90], 8
            //   c645a400             | mov                 byte ptr [ebp - 0x5c], 0
            //   c745b400000000       | mov                 dword ptr [ebp - 0x4c], 0
            //   c745b80f000000       | mov                 dword ptr [ebp - 0x48], 0xf

        $sequence_8 = { b801000000 0f46d8 8d8560ffffff 50 }
            // n = 4, score = 100
            //   b801000000           | mov                 eax, 1
            //   0f46d8               | cmovbe              ebx, eax
            //   8d8560ffffff         | lea                 eax, [ebp - 0xa0]
            //   50                   | push                eax

        $sequence_9 = { 89a558ffffff 68???????? e8???????? 83ec18 c645fc14 8bcc 8d45a4 }
            // n = 7, score = 100
            //   89a558ffffff         | mov                 dword ptr [ebp - 0xa8], esp
            //   68????????           |                     
            //   e8????????           |                     
            //   83ec18               | sub                 esp, 0x18
            //   c645fc14             | mov                 byte ptr [ebp - 4], 0x14
            //   8bcc                 | mov                 ecx, esp
            //   8d45a4               | lea                 eax, [ebp - 0x5c]

    condition:
        7 of them and filesize < 335872
}