rule win_blackpos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.blackpos."
        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.blackpos"
        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 = { 57 50 e8???????? 83c40c 56 8d85e0fdffff }
            // n = 6, score = 100
            //   57                   | push                edi
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   56                   | push                esi
            //   8d85e0fdffff         | lea                 eax, [ebp - 0x220]

        $sequence_1 = { 46 83bddcfbffff1e 0f8c44ffffff 807d2000 754a }
            // n = 5, score = 100
            //   46                   | inc                 esi
            //   83bddcfbffff1e       | cmp                 dword ptr [ebp - 0x424], 0x1e
            //   0f8c44ffffff         | jl                  0xffffff4a
            //   807d2000             | cmp                 byte ptr [ebp + 0x20], 0
            //   754a                 | jne                 0x4c

        $sequence_2 = { f7fb 85d2 740d 8bc6 c1e002 8bb070f84100 }
            // n = 6, score = 100
            //   f7fb                 | idiv                ebx
            //   85d2                 | test                edx, edx
            //   740d                 | je                  0xf
            //   8bc6                 | mov                 eax, esi
            //   c1e002               | shl                 eax, 2
            //   8bb070f84100         | mov                 esi, dword ptr [eax + 0x41f870]

        $sequence_3 = { 7444 8b4508 53 57 8b7d0c }
            // n = 5, score = 100
            //   7444                 | je                  0x46
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   53                   | push                ebx
            //   57                   | push                edi
            //   8b7d0c               | mov                 edi, dword ptr [ebp + 0xc]

        $sequence_4 = { ffd6 85c0 759c 8b85f8fbffff 8b4dfc 5f 5e }
            // n = 7, score = 100
            //   ffd6                 | call                esi
            //   85c0                 | test                eax, eax
            //   759c                 | jne                 0xffffff9e
            //   8b85f8fbffff         | mov                 eax, dword ptr [ebp - 0x408]
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi

        $sequence_5 = { c1e006 03048d60c45800 eb05 b8???????? f6402480 7414 }
            // n = 6, score = 100
            //   c1e006               | shl                 eax, 6
            //   03048d60c45800       | add                 eax, dword ptr [ecx*4 + 0x58c460]
            //   eb05                 | jmp                 7
            //   b8????????           |                     
            //   f6402480             | test                byte ptr [eax + 0x24], 0x80
            //   7414                 | je                  0x16

        $sequence_6 = { 83c40c 6bc930 8975e0 8db1a0f34100 8975e4 eb2b 8a4601 }
            // n = 7, score = 100
            //   83c40c               | add                 esp, 0xc
            //   6bc930               | imul                ecx, ecx, 0x30
            //   8975e0               | mov                 dword ptr [ebp - 0x20], esi
            //   8db1a0f34100         | lea                 esi, [ecx + 0x41f3a0]
            //   8975e4               | mov                 dword ptr [ebp - 0x1c], esi
            //   eb2b                 | jmp                 0x2d
            //   8a4601               | mov                 al, byte ptr [esi + 1]

        $sequence_7 = { 7429 ffb5f4fbffff 8d85d8fbffff 50 57 e8???????? }
            // n = 6, score = 100
            //   7429                 | je                  0x2b
            //   ffb5f4fbffff         | push                dword ptr [ebp - 0x40c]
            //   8d85d8fbffff         | lea                 eax, [ebp - 0x428]
            //   50                   | push                eax
            //   57                   | push                edi
            //   e8????????           |                     

        $sequence_8 = { 85f6 7426 56 8d85fcfbffff }
            // n = 4, score = 100
            //   85f6                 | test                esi, esi
            //   7426                 | je                  0x28
            //   56                   | push                esi
            //   8d85fcfbffff         | lea                 eax, [ebp - 0x404]

        $sequence_9 = { 7517 e8???????? eb10 8d45c4 }
            // n = 4, score = 100
            //   7517                 | jne                 0x19
            //   e8????????           |                     
            //   eb10                 | jmp                 0x12
            //   8d45c4               | lea                 eax, [ebp - 0x3c]

    condition:
        7 of them and filesize < 3293184
}