rule win_sisfader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.sisfader."
        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.sisfader"
        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 = { e8???????? 85c0 b91d000000 0f44d9 }
            // n = 4, score = 300
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   b91d000000           | mov                 ecx, 0x1d
            //   0f44d9               | cmove               ebx, ecx

        $sequence_1 = { 85c9 741f 33c0 85c9 }
            // n = 4, score = 300
            //   85c9                 | test                ecx, ecx
            //   741f                 | je                  0x21
            //   33c0                 | xor                 eax, eax
            //   85c9                 | test                ecx, ecx

        $sequence_2 = { 8955f0 8b45f8 8b4838 894dcc }
            // n = 4, score = 200
            //   8955f0               | mov                 dword ptr [ebp - 0x10], edx
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   8b4838               | mov                 ecx, dword ptr [eax + 0x38]
            //   894dcc               | mov                 dword ptr [ebp - 0x34], ecx

        $sequence_3 = { 33c9 e8???????? 85c0 7502 eb7c }
            // n = 5, score = 200
            //   33c9                 | xor                 ecx, ecx
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7502                 | jne                 4
            //   eb7c                 | jmp                 0x7e

        $sequence_4 = { ff15???????? a3???????? 833d????????00 7510 6a00 }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   a3????????           |                     
            //   833d????????00       |                     
            //   7510                 | jne                 0x12
            //   6a00                 | push                0

        $sequence_5 = { 85c0 754b 8b4f04 83c124 }
            // n = 4, score = 200
            //   85c0                 | test                eax, eax
            //   754b                 | jne                 0x4d
            //   8b4f04               | mov                 ecx, dword ptr [edi + 4]
            //   83c124               | add                 ecx, 0x24

        $sequence_6 = { c705????????07000000 8b442438 8905???????? c705????????00000000 }
            // n = 4, score = 200
            //   c705????????07000000     |     
            //   8b442438             | mov                 eax, dword ptr [esp + 0x38]
            //   8905????????         |                     
            //   c705????????00000000     |     

        $sequence_7 = { 8b442440 89442420 837c242001 7425 }
            // n = 4, score = 200
            //   8b442440             | mov                 eax, dword ptr [esp + 0x40]
            //   89442420             | mov                 dword ptr [esp + 0x20], eax
            //   837c242001           | cmp                 dword ptr [esp + 0x20], 1
            //   7425                 | je                  0x27

        $sequence_8 = { ff15???????? 89442450 837c245000 7402 }
            // n = 4, score = 200
            //   ff15????????         |                     
            //   89442450             | mov                 dword ptr [esp + 0x50], eax
            //   837c245000           | cmp                 dword ptr [esp + 0x50], 0
            //   7402                 | je                  4

        $sequence_9 = { 7568 8d43dc 8906 83f824 }
            // n = 4, score = 200
            //   7568                 | jne                 0x6a
            //   8d43dc               | lea                 eax, [ebx - 0x24]
            //   8906                 | mov                 dword ptr [esi], eax
            //   83f824               | cmp                 eax, 0x24

        $sequence_10 = { 6bc800 8b550c 8b040a 50 ff15???????? }
            // n = 5, score = 200
            //   6bc800               | imul                ecx, eax, 0
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   8b040a               | mov                 eax, dword ptr [edx + ecx]
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_11 = { 33c0 e9???????? e9???????? ff15???????? }
            // n = 4, score = 200
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     
            //   e9????????           |                     
            //   ff15????????         |                     

        $sequence_12 = { 75f5 c70665632985 663939 8b3d???????? 7407 }
            // n = 5, score = 200
            //   75f5                 | jne                 0xfffffff7
            //   c70665632985         | mov                 dword ptr [esi], 0x85296365
            //   663939               | cmp                 word ptr [ecx], di
            //   8b3d????????         |                     
            //   7407                 | je                  9

        $sequence_13 = { 0f84cd010000 6683f92e 750f 6683bc248000000000 0f84b8010000 ffc5 }
            // n = 6, score = 200
            //   0f84cd010000         | je                  0x1d3
            //   6683f92e             | cmp                 cx, 0x2e
            //   750f                 | jne                 0x11
            //   6683bc248000000000     | cmp    word ptr [esp + 0x80], 0
            //   0f84b8010000         | je                  0x1be
            //   ffc5                 | inc                 ebp

        $sequence_14 = { 7424 85c9 7420 8bc3 660f1f440000 8bc8 }
            // n = 6, score = 200
            //   7424                 | je                  0x26
            //   85c9                 | test                ecx, ecx
            //   7420                 | je                  0x22
            //   8bc3                 | mov                 eax, ebx
            //   660f1f440000         | nop                 word ptr [eax + eax]
            //   8bc8                 | mov                 ecx, eax

        $sequence_15 = { 8bda 8bf9 ff15???????? 85c0 0f8584000000 6a06 6a01 }
            // n = 7, score = 200
            //   8bda                 | mov                 ebx, edx
            //   8bf9                 | mov                 edi, ecx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f8584000000         | jne                 0x8a
            //   6a06                 | push                6
            //   6a01                 | push                1

        $sequence_16 = { eb2e 8b4dfc c7411001000000 eb11 8b55fc 8b02 8b4df4 }
            // n = 7, score = 200
            //   eb2e                 | jmp                 0x30
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   c7411001000000       | mov                 dword ptr [ecx + 0x10], 1
            //   eb11                 | jmp                 0x13
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   8b02                 | mov                 eax, dword ptr [edx]
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]

        $sequence_17 = { 8b3d???????? 81c600010000 c745dcaaeeddff c745e4e1f00000 }
            // n = 4, score = 200
            //   8b3d????????         |                     
            //   81c600010000         | add                 esi, 0x100
            //   c745dcaaeeddff       | mov                 dword ptr [ebp - 0x24], 0xffddeeaa
            //   c745e4e1f00000       | mov                 dword ptr [ebp - 0x1c], 0xf0e1

        $sequence_18 = { 83c418 85c0 7502 eb67 8b4dfc }
            // n = 5, score = 200
            //   83c418               | add                 esp, 0x18
            //   85c0                 | test                eax, eax
            //   7502                 | jne                 4
            //   eb67                 | jmp                 0x69
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]

        $sequence_19 = { 85c0 741d 8bd3 0f1f440000 8bc2 ffc2 }
            // n = 6, score = 200
            //   85c0                 | test                eax, eax
            //   741d                 | je                  0x1f
            //   8bd3                 | mov                 edx, ebx
            //   0f1f440000           | nop                 dword ptr [eax + eax]
            //   8bc2                 | mov                 eax, edx
            //   ffc2                 | inc                 edx

        $sequence_20 = { 6685c0 0f8496010000 6683f82e 750b }
            // n = 4, score = 200
            //   6685c0               | test                ax, ax
            //   0f8496010000         | je                  0x19c
            //   6683f82e             | cmp                 ax, 0x2e
            //   750b                 | jne                 0xd

        $sequence_21 = { 83ec60 c745fc00000000 c745e000000000 6a40 8b450c }
            // n = 5, score = 200
            //   83ec60               | sub                 esp, 0x60
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   c745e000000000       | mov                 dword ptr [ebp - 0x20], 0
            //   6a40                 | push                0x40
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]

        $sequence_22 = { 837c242002 7441 837c242003 745d 837c242004 7479 837c242005 }
            // n = 7, score = 200
            //   837c242002           | cmp                 dword ptr [esp + 0x20], 2
            //   7441                 | je                  0x43
            //   837c242003           | cmp                 dword ptr [esp + 0x20], 3
            //   745d                 | je                  0x5f
            //   837c242004           | cmp                 dword ptr [esp + 0x20], 4
            //   7479                 | je                  0x7b
            //   837c242005           | cmp                 dword ptr [esp + 0x20], 5

        $sequence_23 = { 7405 e9???????? 83bc248000000000 7539 }
            // n = 4, score = 200
            //   7405                 | je                  7
            //   e9????????           |                     
            //   83bc248000000000     | cmp                 dword ptr [esp + 0x80], 0
            //   7539                 | jne                 0x3b

        $sequence_24 = { 33c9 85c0 7415 0f1f00 8bc1 }
            // n = 5, score = 200
            //   33c9                 | xor                 ecx, ecx
            //   85c0                 | test                eax, eax
            //   7415                 | je                  0x17
            //   0f1f00               | nop                 dword ptr [eax]
            //   8bc1                 | mov                 eax, ecx

        $sequence_25 = { 6a00 6a00 6a01 e8???????? 83c40c eb38 6a00 }
            // n = 7, score = 200
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a01                 | push                1
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   eb38                 | jmp                 0x3a
            //   6a00                 | push                0

        $sequence_26 = { 56 57 8b7d10 8b7720 c706aaeeddff 8b420c 89460c }
            // n = 7, score = 200
            //   56                   | push                esi
            //   57                   | push                edi
            //   8b7d10               | mov                 edi, dword ptr [ebp + 0x10]
            //   8b7720               | mov                 esi, dword ptr [edi + 0x20]
            //   c706aaeeddff         | mov                 dword ptr [esi], 0xffddeeaa
            //   8b420c               | mov                 eax, dword ptr [edx + 0xc]
            //   89460c               | mov                 dword ptr [esi + 0xc], eax

        $sequence_27 = { 8b4204 8bcf 83c024 50 e8???????? }
            // n = 5, score = 200
            //   8b4204               | mov                 eax, dword ptr [edx + 4]
            //   8bcf                 | mov                 ecx, edi
            //   83c024               | add                 eax, 0x24
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_28 = { 6bc800 8b5510 0fb7440a40 85c0 }
            // n = 4, score = 200
            //   6bc800               | imul                ecx, eax, 0
            //   8b5510               | mov                 edx, dword ptr [ebp + 0x10]
            //   0fb7440a40           | movzx               eax, word ptr [edx + ecx + 0x40]
            //   85c0                 | test                eax, eax

        $sequence_29 = { e8???????? 33c0 83f801 7425 baffffffff }
            // n = 5, score = 200
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax
            //   83f801               | cmp                 eax, 1
            //   7425                 | je                  0x27
            //   baffffffff           | mov                 edx, 0xffffffff

    condition:
        7 of them and filesize < 417792
}