rule win_sality_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.sality."
        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.sality"
        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 = { 51 ff15???????? 8d95fcfeffff 52 ff15???????? 8b85d4fdffff }
            // n = 6, score = 400
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8d95fcfeffff         | lea                 edx, [ebp - 0x104]
            //   52                   | push                edx
            //   ff15????????         |                     
            //   8b85d4fdffff         | mov                 eax, dword ptr [ebp - 0x22c]

        $sequence_1 = { 51 ff15???????? a3???????? 833d????????00 7505 }
            // n = 5, score = 400
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   a3????????           |                     
            //   833d????????00       |                     
            //   7505                 | jne                 7

        $sequence_2 = { 66ab aa c78574efffff00000000 c78578efffff00000000 c78568eeffff00000000 33c0 89856ceeffff }
            // n = 7, score = 400
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al
            //   c78574efffff00000000     | mov    dword ptr [ebp - 0x108c], 0
            //   c78578efffff00000000     | mov    dword ptr [ebp - 0x1088], 0
            //   c78568eeffff00000000     | mov    dword ptr [ebp - 0x1198], 0
            //   33c0                 | xor                 eax, eax
            //   89856ceeffff         | mov                 dword ptr [ebp - 0x1194], eax

        $sequence_3 = { 66ab aa ff15???????? a3???????? a1???????? }
            // n = 5, score = 400
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al
            //   ff15????????         |                     
            //   a3????????           |                     
            //   a1????????           |                     

        $sequence_4 = { 66ab aa c785d4fdffff00000000 8d85ccfdffff 8985ccfdffff c785c8fdffff00000000 68f8000000 }
            // n = 7, score = 400
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al
            //   c785d4fdffff00000000     | mov    dword ptr [ebp - 0x22c], 0
            //   8d85ccfdffff         | lea                 eax, [ebp - 0x234]
            //   8985ccfdffff         | mov                 dword ptr [ebp - 0x234], eax
            //   c785c8fdffff00000000     | mov    dword ptr [ebp - 0x238], 0
            //   68f8000000           | push                0xf8

        $sequence_5 = { 66ab aa c785bcfeffff00000000 b94f000000 33c0 8dbdc0feffff f3ab }
            // n = 7, score = 400
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al
            //   c785bcfeffff00000000     | mov    dword ptr [ebp - 0x144], 0
            //   b94f000000           | mov                 ecx, 0x4f
            //   33c0                 | xor                 eax, eax
            //   8dbdc0feffff         | lea                 edi, [ebp - 0x140]
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax

        $sequence_6 = { 833d????????00 7e0d 6800010000 ff15???????? ebea }
            // n = 5, score = 400
            //   833d????????00       |                     
            //   7e0d                 | jle                 0xf
            //   6800010000           | push                0x100
            //   ff15????????         |                     
            //   ebea                 | jmp                 0xffffffec

        $sequence_7 = { 66ab aa c785f4efffff00000000 c785f8efffff00000000 c745fc00000000 }
            // n = 5, score = 400
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al
            //   c785f4efffff00000000     | mov    dword ptr [ebp - 0x100c], 0
            //   c785f8efffff00000000     | mov    dword ptr [ebp - 0x1008], 0
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0

        $sequence_8 = { ff95bc154000 85c0 7403 eb0c 58 e8???????? }
            // n = 6, score = 200
            //   ff95bc154000         | call                dword ptr [ebp + 0x4015bc]
            //   85c0                 | test                eax, eax
            //   7403                 | je                  5
            //   eb0c                 | jmp                 0xe
            //   58                   | pop                 eax
            //   e8????????           |                     

        $sequence_9 = { 8b5d0c b11c 8b4508 d3e8 }
            // n = 4, score = 200
            //   8b5d0c               | mov                 ebx, dword ptr [ebp + 0xc]
            //   b11c                 | mov                 cl, 0x1c
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   d3e8                 | shr                 eax, cl

        $sequence_10 = { 03763c 813e50450000 0f857d000000 8b7c2410 b996000000 32c0 f2ae }
            // n = 7, score = 200
            //   03763c               | add                 esi, dword ptr [esi + 0x3c]
            //   813e50450000         | cmp                 dword ptr [esi], 0x4550
            //   0f857d000000         | jne                 0x83
            //   8b7c2410             | mov                 edi, dword ptr [esp + 0x10]
            //   b996000000           | mov                 ecx, 0x96
            //   32c0                 | xor                 al, al
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]

        $sequence_11 = { 1c69 2f 8803 43 80e904 73ec }
            // n = 6, score = 200
            //   1c69                 | sbb                 al, 0x69
            //   2f                   | das                 
            //   8803                 | mov                 byte ptr [ebx], al
            //   43                   | inc                 ebx
            //   80e904               | sub                 cl, 4
            //   73ec                 | jae                 0xffffffee

        $sequence_12 = { 8dbd5d154000 b909000000 f3a6 750e }
            // n = 4, score = 200
            //   8dbd5d154000         | lea                 edi, [ebp + 0x40155d]
            //   b909000000           | mov                 ecx, 9
            //   f3a6                 | repe cmpsb          byte ptr [esi], byte ptr es:[edi]
            //   750e                 | jne                 0x10

        $sequence_13 = { 73ec 8b450c c9 c20800 }
            // n = 4, score = 200
            //   73ec                 | jae                 0xffffffee
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   c9                   | leave               
            //   c20800               | ret                 8

        $sequence_14 = { 8b4510 ff35???????? 8f80b8000000 ff35???????? 8f80c4000000 }
            // n = 5, score = 200
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   ff35????????         |                     
            //   8f80b8000000         | pop                 dword ptr [eax + 0xb8]
            //   ff35????????         |                     
            //   8f80c4000000         | pop                 dword ptr [eax + 0xc4]

        $sequence_15 = { 52 50 ff95bc154000 85c0 7415 }
            // n = 5, score = 200
            //   52                   | push                edx
            //   50                   | push                eax
            //   ff95bc154000         | call                dword ptr [ebp + 0x4015bc]
            //   85c0                 | test                eax, eax
            //   7415                 | je                  0x17

        $sequence_16 = { 8b4508 df28 df7de0 df6de0 d81d???????? }
            // n = 5, score = 100
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   df28                 | fild                qword ptr [eax]
            //   df7de0               | fistp               qword ptr [ebp - 0x20]
            //   df6de0               | fild                qword ptr [ebp - 0x20]
            //   d81d????????         |                     

        $sequence_17 = { 3a4411ff 7454 8b4d08 8b4508 85c0 }
            // n = 5, score = 100
            //   3a4411ff             | cmp                 al, byte ptr [ecx + edx - 1]
            //   7454                 | je                  0x56
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   85c0                 | test                eax, eax

        $sequence_18 = { e8???????? 68???????? a1???????? ff7074 e8???????? }
            // n = 5, score = 100
            //   e8????????           |                     
            //   68????????           |                     
            //   a1????????           |                     
            //   ff7074               | push                dword ptr [eax + 0x74]
            //   e8????????           |                     

        $sequence_19 = { 8948fc c6040800 eb25 51 e8???????? 8b13 }
            // n = 6, score = 100
            //   8948fc               | mov                 dword ptr [eax - 4], ecx
            //   c6040800             | mov                 byte ptr [eax + ecx], 0
            //   eb25                 | jmp                 0x27
            //   51                   | push                ecx
            //   e8????????           |                     
            //   8b13                 | mov                 edx, dword ptr [ebx]

        $sequence_20 = { 83c410 e9???????? ff33 e8???????? 83c304 ff4c2414 }
            // n = 6, score = 100
            //   83c410               | add                 esp, 0x10
            //   e9????????           |                     
            //   ff33                 | push                dword ptr [ebx]
            //   e8????????           |                     
            //   83c304               | add                 ebx, 4
            //   ff4c2414             | dec                 dword ptr [esp + 0x14]

        $sequence_21 = { 83f8ff 7505 e9???????? 56 e8???????? }
            // n = 5, score = 100
            //   83f8ff               | cmp                 eax, -1
            //   7505                 | jne                 7
            //   e9????????           |                     
            //   56                   | push                esi
            //   e8????????           |                     

        $sequence_22 = { ff75f3 e8???????? 85c0 754d 68???????? }
            // n = 5, score = 100
            //   ff75f3               | push                dword ptr [ebp - 0xd]
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   754d                 | jne                 0x4f
            //   68????????           |                     

        $sequence_23 = { 50 53 8bd8 0bc9 7518 }
            // n = 5, score = 100
            //   50                   | push                eax
            //   53                   | push                ebx
            //   8bd8                 | mov                 ebx, eax
            //   0bc9                 | or                  ecx, ecx
            //   7518                 | jne                 0x1a

    condition:
        7 of them and filesize < 1523712
}