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rule win_avos_locker_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.avos_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.avos_locker"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 6a72 8d8dd0faffff e8???????? 8885e0faffff 6a79 8d8dd0faffff e8???????? }
            // n = 7, score = 100
            //   6a72                 | push                0x72
            //   8d8dd0faffff         | lea                 ecx, [ebp - 0x530]
            //   e8????????           |                     
            //   8885e0faffff         | mov                 byte ptr [ebp - 0x520], al
            //   6a79                 | push                0x79
            //   8d8dd0faffff         | lea                 ecx, [ebp - 0x530]
            //   e8????????           |                     

        $sequence_1 = { 74bc 83f807 77c7 ff2485f7254700 8bce e8???????? eb45 }
            // n = 7, score = 100
            //   74bc                 | je                  0xffffffbe
            //   83f807               | cmp                 eax, 7
            //   77c7                 | ja                  0xffffffc9
            //   ff2485f7254700       | jmp                 dword ptr [eax*4 + 0x4725f7]
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   eb45                 | jmp                 0x47

        $sequence_2 = { 3d00100000 7227 8d4823 3bc8 0f86c2000000 51 e8???????? }
            // n = 7, score = 100
            //   3d00100000           | cmp                 eax, 0x1000
            //   7227                 | jb                  0x29
            //   8d4823               | lea                 ecx, [eax + 0x23]
            //   3bc8                 | cmp                 ecx, eax
            //   0f86c2000000         | jbe                 0xc8
            //   51                   | push                ecx
            //   e8????????           |                     

        $sequence_3 = { 8d8d44efffff e8???????? 888558efffff 6a74 8d8d44efffff e8???????? 888559efffff }
            // n = 7, score = 100
            //   8d8d44efffff         | lea                 ecx, [ebp - 0x10bc]
            //   e8????????           |                     
            //   888558efffff         | mov                 byte ptr [ebp - 0x10a8], al
            //   6a74                 | push                0x74
            //   8d8d44efffff         | lea                 ecx, [ebp - 0x10bc]
            //   e8????????           |                     
            //   888559efffff         | mov                 byte ptr [ebp - 0x10a7], al

        $sequence_4 = { 6a08 c645ac00 8d4dc0 ff75ac 6a08 e8???????? 8b75b8 }
            // n = 7, score = 100
            //   6a08                 | push                8
            //   c645ac00             | mov                 byte ptr [ebp - 0x54], 0
            //   8d4dc0               | lea                 ecx, [ebp - 0x40]
            //   ff75ac               | push                dword ptr [ebp - 0x54]
            //   6a08                 | push                8
            //   e8????????           |                     
            //   8b75b8               | mov                 esi, dword ptr [ebp - 0x48]

        $sequence_5 = { 0f1000 68???????? c745f00f000000 0f1145a4 f30f7e4010 660fd645b4 c7401000000000 }
            // n = 7, score = 100
            //   0f1000               | movups              xmm0, xmmword ptr [eax]
            //   68????????           |                     
            //   c745f00f000000       | mov                 dword ptr [ebp - 0x10], 0xf
            //   0f1145a4             | movups              xmmword ptr [ebp - 0x5c], xmm0
            //   f30f7e4010           | movq                xmm0, qword ptr [eax + 0x10]
            //   660fd645b4           | movq                qword ptr [ebp - 0x4c], xmm0
            //   c7401000000000       | mov                 dword ptr [eax + 0x10], 0

        $sequence_6 = { 50 e8???????? 83c408 50 e8???????? 83c408 c645dc55 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   c645dc55             | mov                 byte ptr [ebp - 0x24], 0x55

        $sequence_7 = { e8???????? 888533fcffff 6a65 8d8d30fcffff e8???????? 888534fcffff 6a78 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   888533fcffff         | mov                 byte ptr [ebp - 0x3cd], al
            //   6a65                 | push                0x65
            //   8d8d30fcffff         | lea                 ecx, [ebp - 0x3d0]
            //   e8????????           |                     
            //   888534fcffff         | mov                 byte ptr [ebp - 0x3cc], al
            //   6a78                 | push                0x78

        $sequence_8 = { 8d45e4 d1fa 8bca c1e91f 03ca 8b55c0 83f902 }
            // n = 7, score = 100
            //   8d45e4               | lea                 eax, [ebp - 0x1c]
            //   d1fa                 | sar                 edx, 1
            //   8bca                 | mov                 ecx, edx
            //   c1e91f               | shr                 ecx, 0x1f
            //   03ca                 | add                 ecx, edx
            //   8b55c0               | mov                 edx, dword ptr [ebp - 0x40]
            //   83f902               | cmp                 ecx, 2

        $sequence_9 = { 8b08 898d90f9ffff 8b4804 898d94f9ffff c70000000000 c7400400000000 c645fc05 }
            // n = 7, score = 100
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   898d90f9ffff         | mov                 dword ptr [ebp - 0x670], ecx
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]
            //   898d94f9ffff         | mov                 dword ptr [ebp - 0x66c], ecx
            //   c70000000000         | mov                 dword ptr [eax], 0
            //   c7400400000000       | mov                 dword ptr [eax + 4], 0
            //   c645fc05             | mov                 byte ptr [ebp - 4], 5

    condition:
        7 of them and filesize < 1701888
}