rule win_sisfader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        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 = "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 = { 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 7419 }
            // n = 5, score = 300
            //   85c9                 | test                ecx, ecx
            //   741f                 | je                  0x21
            //   33c0                 | xor                 eax, eax
            //   85c9                 | test                ecx, ecx
            //   7419                 | je                  0x1b

        $sequence_2 = { ff15???????? 33c0 e9???????? e9???????? ff15???????? }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     
            //   e9????????           |                     
            //   ff15????????         |                     

        $sequence_3 = { 50 ff55c8 8945c4 837dc400 750d 685a040000 ff15???????? }
            // n = 7, score = 200
            //   50                   | push                eax
            //   ff55c8               | call                dword ptr [ebp - 0x38]
            //   8945c4               | mov                 dword ptr [ebp - 0x3c], eax
            //   837dc400             | cmp                 dword ptr [ebp - 0x3c], 0
            //   750d                 | jne                 0xf
            //   685a040000           | push                0x45a
            //   ff15????????         |                     

        $sequence_4 = { 8d4766 50 ffd6 8d83e6000000 50 }
            // n = 5, score = 200
            //   8d4766               | lea                 eax, [edi + 0x66]
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   8d83e6000000         | lea                 eax, [ebx + 0xe6]
            //   50                   | push                eax

        $sequence_5 = { 8b02 8945f4 8b4de8 8b11 8955f8 8b45f8 8a08 }
            // n = 7, score = 200
            //   8b02                 | mov                 eax, dword ptr [edx]
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   8b4de8               | mov                 ecx, dword ptr [ebp - 0x18]
            //   8b11                 | mov                 edx, dword ptr [ecx]
            //   8955f8               | mov                 dword ptr [ebp - 8], edx
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   8a08                 | mov                 cl, byte ptr [eax]

        $sequence_6 = { 0f8286000000 8139aaeeddff 0f858e000000 8b4104 85c0 7522 }
            // n = 6, score = 200
            //   0f8286000000         | jb                  0x8c
            //   8139aaeeddff         | cmp                 dword ptr [ecx], 0xffddeeaa
            //   0f858e000000         | jne                 0x94
            //   8b4104               | mov                 eax, dword ptr [ecx + 4]
            //   85c0                 | test                eax, eax
            //   7522                 | jne                 0x24

        $sequence_7 = { c705????????10000000 8b442430 8905???????? c705????????07000000 }
            // n = 4, score = 200
            //   c705????????10000000     |     
            //   8b442430             | mov                 eax, dword ptr [esp + 0x30]
            //   8905????????         |                     
            //   c705????????07000000     |     

        $sequence_8 = { 8b442448 89442420 837c242001 7402 eb05 }
            // n = 5, score = 200
            //   8b442448             | mov                 eax, dword ptr [esp + 0x48]
            //   89442420             | mov                 dword ptr [esp + 0x20], eax
            //   837c242001           | cmp                 dword ptr [esp + 0x20], 1
            //   7402                 | je                  4
            //   eb05                 | jmp                 7

        $sequence_9 = { 5d c3 55 8bec 8b450c 8b4d08 8d4401ff }
            // n = 7, score = 200
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   8d4401ff             | lea                 eax, [ecx + eax - 1]

        $sequence_10 = { 8945f8 eb1f 8b4d1c 8b11 52 8b4518 }
            // n = 6, score = 200
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   eb1f                 | jmp                 0x21
            //   8b4d1c               | mov                 ecx, dword ptr [ebp + 0x1c]
            //   8b11                 | mov                 edx, dword ptr [ecx]
            //   52                   | push                edx
            //   8b4518               | mov                 eax, dword ptr [ebp + 0x18]

        $sequence_11 = { 8905???????? c705????????07000000 8b442438 8905???????? c705????????00000000 8b442440 8905???????? }
            // n = 7, score = 200
            //   8905????????         |                     
            //   c705????????07000000     |     
            //   8b442438             | mov                 eax, dword ptr [esp + 0x38]
            //   8905????????         |                     
            //   c705????????00000000     |     
            //   8b442440             | mov                 eax, dword ptr [esp + 0x40]
            //   8905????????         |                     

        $sequence_12 = { 8d540118 8955f0 8b45f8 8b4838 894dcc c745e800000000 }
            // n = 6, score = 200
            //   8d540118             | lea                 edx, [ecx + eax + 0x18]
            //   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
            //   c745e800000000       | mov                 dword ptr [ebp - 0x18], 0

        $sequence_13 = { 0f11442454 c744245061090000 e8???????? 85c0 }
            // n = 4, score = 200
            //   0f11442454           | movups              xmmword ptr [esp + 0x54], xmm0
            //   c744245061090000     | mov                 dword ptr [esp + 0x50], 0x961
            //   e8????????           |                     
            //   85c0                 | test                eax, eax

        $sequence_14 = { 8945d0 7418 8b4dd0 51 8b55fc 52 e8???????? }
            // n = 7, score = 200
            //   8945d0               | mov                 dword ptr [ebp - 0x30], eax
            //   7418                 | je                  0x1a
            //   8b4dd0               | mov                 ecx, dword ptr [ebp - 0x30]
            //   51                   | push                ecx
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   52                   | push                edx
            //   e8????????           |                     

        $sequence_15 = { 884afd 0fb6480f 3248ff 884afe }
            // n = 4, score = 200
            //   884afd               | mov                 byte ptr [edx - 3], cl
            //   0fb6480f             | movzx               ecx, byte ptr [eax + 0xf]
            //   3248ff               | xor                 cl, byte ptr [eax - 1]
            //   884afe               | mov                 byte ptr [edx - 2], cl

        $sequence_16 = { 33c0 85c9 7412 8bc8 }
            // n = 4, score = 200
            //   33c0                 | xor                 eax, eax
            //   85c9                 | test                ecx, ecx
            //   7412                 | je                  0x14
            //   8bc8                 | mov                 ecx, eax

        $sequence_17 = { 89842480000000 83bc248000000000 750d b95a040000 ff15???????? }
            // n = 5, score = 200
            //   89842480000000       | mov                 dword ptr [esp + 0x80], eax
            //   83bc248000000000     | cmp                 dword ptr [esp + 0x80], 0
            //   750d                 | jne                 0xf
            //   b95a040000           | mov                 ecx, 0x45a
            //   ff15????????         |                     

        $sequence_18 = { ff55e0 33c9 0f8543ffffff 8b55f8 52 }
            // n = 5, score = 200
            //   ff55e0               | call                dword ptr [ebp - 0x20]
            //   33c9                 | xor                 ecx, ecx
            //   0f8543ffffff         | jne                 0xffffff49
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   52                   | push                edx

        $sequence_19 = { eb12 c744245401000000 33c0 85c0 }
            // n = 4, score = 200
            //   eb12                 | jmp                 0x14
            //   c744245401000000     | mov                 dword ptr [esp + 0x54], 1
            //   33c0                 | xor                 eax, eax
            //   85c0                 | test                eax, eax

        $sequence_20 = { 5e 5b c3 8d81afedffff 83f806 }
            // n = 5, score = 200
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   c3                   | ret                 
            //   8d81afedffff         | lea                 eax, [ecx - 0x1251]
            //   83f806               | cmp                 eax, 6

        $sequence_21 = { ff75ec ffd3 ff75ec ff15???????? ff15???????? 50 ff15???????? }
            // n = 7, score = 200
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   ffd3                 | call                ebx
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   ff15????????         |                     
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_22 = { 8987cc000000 0f108348010000 6800000100 6a40 0f1187d0000000 }
            // n = 5, score = 200
            //   8987cc000000         | mov                 dword ptr [edi + 0xcc], eax
            //   0f108348010000       | movups              xmm0, xmmword ptr [ebx + 0x148]
            //   6800000100           | push                0x10000
            //   6a40                 | push                0x40
            //   0f1187d0000000       | movups              xmmword ptr [edi + 0xd0], xmm0

        $sequence_23 = { 0f110d???????? 0f10872e010000 0f118600010000 ff15???????? }
            // n = 4, score = 200
            //   0f110d????????       |                     
            //   0f10872e010000       | movups              xmm0, xmmword ptr [edi + 0x12e]
            //   0f118600010000       | movups              xmmword ptr [esi + 0x100], xmm0
            //   ff15????????         |                     

        $sequence_24 = { 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_25 = { c700aaeeddff 33c0 894710 c7470430020000 }
            // n = 4, score = 200
            //   c700aaeeddff         | mov                 dword ptr [eax], 0xffddeeaa
            //   33c0                 | xor                 eax, eax
            //   894710               | mov                 dword ptr [edi + 0x10], eax
            //   c7470430020000       | mov                 dword ptr [edi + 4], 0x230

        $sequence_26 = { 7425 837c242002 7441 837c242003 745d 837c242004 7479 }
            // n = 7, score = 200
            //   7425                 | je                  0x27
            //   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

        $sequence_27 = { 746b 57 ff15???????? 6683780802 }
            // n = 4, score = 200
            //   746b                 | je                  0x6d
            //   57                   | push                edi
            //   ff15????????         |                     
            //   6683780802           | cmp                 word ptr [eax + 8], 2

        $sequence_28 = { 837df000 7407 8d55e0 52 ff55f0 837de000 }
            // n = 6, score = 200
            //   837df000             | cmp                 dword ptr [ebp - 0x10], 0
            //   7407                 | je                  9
            //   8d55e0               | lea                 edx, [ebp - 0x20]
            //   52                   | push                edx
            //   ff55f0               | call                dword ptr [ebp - 0x10]
            //   837de000             | cmp                 dword ptr [ebp - 0x20], 0

        $sequence_29 = { 7518 0fb74c246e 6685c9 7415 6683f92e 7508 }
            // n = 6, score = 200
            //   7518                 | jne                 0x1a
            //   0fb74c246e           | movzx               ecx, word ptr [esp + 0x6e]
            //   6685c9               | test                cx, cx
            //   7415                 | je                  0x17
            //   6683f92e             | cmp                 cx, 0x2e
            //   7508                 | jne                 0xa

    condition:
        7 of them and filesize < 417792
}