rule win_slingshot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.slingshot."
        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.slingshot"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 33db 53 ff15???????? 8bf0 3bf3 }
            // n = 6, score = 200
            //   50                   | push                eax
            //   33db                 | xor                 ebx, ebx
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   3bf3                 | cmp                 esi, ebx

        $sequence_1 = { 3bcb 7426 ff750c 51 }
            // n = 4, score = 100
            //   3bcb                 | cmp                 ecx, ebx
            //   7426                 | je                  0x28
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   51                   | push                ecx

        $sequence_2 = { 03c1 41 03d1 49 }
            // n = 4, score = 100
            //   03c1                 | add                 eax, ecx
            //   41                   | inc                 ecx
            //   03d1                 | add                 edx, ecx
            //   49                   | dec                 ecx

        $sequence_3 = { f7d3 235c2430 44 0bdb }
            // n = 4, score = 100
            //   f7d3                 | not                 ebx
            //   235c2430             | and                 ebx, dword ptr [esp + 0x30]
            //   44                   | inc                 esp
            //   0bdb                 | or                  ebx, ebx

        $sequence_4 = { 23d8 8b4c9a08 894df8 03ce 23c8 894d0c 8d4c8a08 }
            // n = 7, score = 100
            //   23d8                 | and                 ebx, eax
            //   8b4c9a08             | mov                 ecx, dword ptr [edx + ebx*4 + 8]
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   03ce                 | add                 ecx, esi
            //   23c8                 | and                 ecx, eax
            //   894d0c               | mov                 dword ptr [ebp + 0xc], ecx
            //   8d4c8a08             | lea                 ecx, [edx + ecx*4 + 8]

        $sequence_5 = { 41 b909040000 44 8bc7 33d2 b900120000 c744242880000000 }
            // n = 7, score = 100
            //   41                   | inc                 ecx
            //   b909040000           | mov                 ecx, 0x409
            //   44                   | inc                 esp
            //   8bc7                 | mov                 eax, edi
            //   33d2                 | xor                 edx, edx
            //   b900120000           | mov                 ecx, 0x1200
            //   c744242880000000     | mov                 dword ptr [esp + 0x28], 0x80

        $sequence_6 = { 8bf0 8bfa ff15???????? 8bd7 5f }
            // n = 5, score = 100
            //   8bf0                 | mov                 esi, eax
            //   8bfa                 | mov                 edi, edx
            //   ff15????????         |                     
            //   8bd7                 | mov                 edx, edi
            //   5f                   | pop                 edi

        $sequence_7 = { 3bcb 7461 8b01 83f807 }
            // n = 4, score = 100
            //   3bcb                 | cmp                 ecx, ebx
            //   7461                 | je                  0x63
            //   8b01                 | mov                 eax, dword ptr [ecx]
            //   83f807               | cmp                 eax, 7

        $sequence_8 = { 3bcb 7504 6a08 eb7a }
            // n = 4, score = 100
            //   3bcb                 | cmp                 ecx, ebx
            //   7504                 | jne                 6
            //   6a08                 | push                8
            //   eb7a                 | jmp                 0x7c

        $sequence_9 = { 8d4101 48 8d8c2400020000 ff15???????? }
            // n = 4, score = 100
            //   8d4101               | lea                 eax, [ecx + 1]
            //   48                   | dec                 eax
            //   8d8c2400020000       | lea                 ecx, [esp + 0x200]
            //   ff15????????         |                     

        $sequence_10 = { c1e810 66894604 66895e06 85ff 7504 }
            // n = 5, score = 100
            //   c1e810               | shr                 eax, 0x10
            //   66894604             | mov                 word ptr [esi + 4], ax
            //   66895e06             | mov                 word ptr [esi + 6], bx
            //   85ff                 | test                edi, edi
            //   7504                 | jne                 6

        $sequence_11 = { 03cb 8b5dfc 23c8 894d0c 8b4c8a08 894c9a08 }
            // n = 6, score = 100
            //   03cb                 | add                 ecx, ebx
            //   8b5dfc               | mov                 ebx, dword ptr [ebp - 4]
            //   23c8                 | and                 ecx, eax
            //   894d0c               | mov                 dword ptr [ebp + 0xc], ecx
            //   8b4c8a08             | mov                 ecx, dword ptr [edx + ecx*4 + 8]
            //   894c9a08             | mov                 dword ptr [edx + ebx*4 + 8], ecx

        $sequence_12 = { 3bcb 743b 6afe 58 }
            // n = 4, score = 100
            //   3bcb                 | cmp                 ecx, ebx
            //   743b                 | je                  0x3d
            //   6afe                 | push                -2
            //   58                   | pop                 eax

        $sequence_13 = { 8b08 e8???????? 48 83c440 5d c3 }
            // n = 6, score = 100
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   e8????????           |                     
            //   48                   | dec                 eax
            //   83c440               | add                 esp, 0x40
            //   5d                   | pop                 ebp
            //   c3                   | ret                 

        $sequence_14 = { 3bcb 7420 0fb700 d1e8 50 51 ff75f8 }
            // n = 7, score = 100
            //   3bcb                 | cmp                 ecx, ebx
            //   7420                 | je                  0x22
            //   0fb700               | movzx               eax, word ptr [eax]
            //   d1e8                 | shr                 eax, 1
            //   50                   | push                eax
            //   51                   | push                ecx
            //   ff75f8               | push                dword ptr [ebp - 8]

        $sequence_15 = { 3bcb 7442 395dfc 7414 }
            // n = 4, score = 100
            //   3bcb                 | cmp                 ecx, ebx
            //   7442                 | je                  0x44
            //   395dfc               | cmp                 dword ptr [ebp - 4], ebx
            //   7414                 | je                  0x16

        $sequence_16 = { 48 8d5304 48 8d4c2478 e8???????? }
            // n = 5, score = 100
            //   48                   | dec                 eax
            //   8d5304               | lea                 edx, [ebx + 4]
            //   48                   | dec                 eax
            //   8d4c2478             | lea                 ecx, [esp + 0x78]
            //   e8????????           |                     

        $sequence_17 = { 740b 48 8bcb e8???????? }
            // n = 4, score = 100
            //   740b                 | je                  0xd
            //   48                   | dec                 eax
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     

        $sequence_18 = { 50 ff15???????? 8bf0 ff7508 8bd6 e8???????? }
            // n = 6, score = 100
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   ff7508               | push                dword ptr [ebp + 8]
            //   8bd6                 | mov                 edx, esi
            //   e8????????           |                     

        $sequence_19 = { ff15???????? 8bd8 59 895df8 85db 7518 bf6f658c04 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax
            //   59                   | pop                 ecx
            //   895df8               | mov                 dword ptr [ebp - 8], ebx
            //   85db                 | test                ebx, ebx
            //   7518                 | jne                 0x1a
            //   bf6f658c04           | mov                 edi, 0x48c656f

        $sequence_20 = { 8944244c eb2e ff74241c ffd3 89442448 eb22 ff74241c }
            // n = 7, score = 100
            //   8944244c             | mov                 dword ptr [esp + 0x4c], eax
            //   eb2e                 | jmp                 0x30
            //   ff74241c             | push                dword ptr [esp + 0x1c]
            //   ffd3                 | call                ebx
            //   89442448             | mov                 dword ptr [esp + 0x48], eax
            //   eb22                 | jmp                 0x24
            //   ff74241c             | push                dword ptr [esp + 0x1c]

        $sequence_21 = { ffc0 48 83c104 3d00010000 }
            // n = 4, score = 100
            //   ffc0                 | inc                 eax
            //   48                   | dec                 eax
            //   83c104               | add                 ecx, 4
            //   3d00010000           | cmp                 eax, 0x100

        $sequence_22 = { 3bcb 7512 ff7708 ff37 }
            // n = 4, score = 100
            //   3bcb                 | cmp                 ecx, ebx
            //   7512                 | jne                 0x14
            //   ff7708               | push                dword ptr [edi + 8]
            //   ff37                 | push                dword ptr [edi]

    condition:
        7 of them and filesize < 663552
}