rule win_ghost_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.ghost_rat."
        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.ghost_rat"
        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 = { 8b400c 85c0 7505 a1???????? 50 8bce e8???????? }
            // n = 7, score = 500
            //   8b400c               | mov                 eax, dword ptr [eax + 0xc]
            //   85c0                 | test                eax, eax
            //   7505                 | jne                 7
            //   a1????????           |                     
            //   50                   | push                eax
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     

        $sequence_1 = { 8bd9 e8???????? 8b4d08 3bc8 }
            // n = 4, score = 500
            //   8bd9                 | mov                 ebx, ecx
            //   e8????????           |                     
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   3bc8                 | cmp                 ecx, eax

        $sequence_2 = { 6a01 56 ff15???????? 5e c20800 }
            // n = 5, score = 500
            //   6a01                 | push                1
            //   56                   | push                esi
            //   ff15????????         |                     
            //   5e                   | pop                 esi
            //   c20800               | ret                 8

        $sequence_3 = { c745f800000000 df6df4 83ec08 dc0d???????? dd1c24 }
            // n = 5, score = 400
            //   c745f800000000       | mov                 dword ptr [ebp - 8], 0
            //   df6df4               | fild                qword ptr [ebp - 0xc]
            //   83ec08               | sub                 esp, 8
            //   dc0d????????         |                     
            //   dd1c24               | fstp                qword ptr [esp]

        $sequence_4 = { 8be5 5d c20400 894df4 c745f800000000 }
            // n = 5, score = 400
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c20400               | ret                 4
            //   894df4               | mov                 dword ptr [ebp - 0xc], ecx
            //   c745f800000000       | mov                 dword ptr [ebp - 8], 0

        $sequence_5 = { 6a6b 8bce e8???????? 5f }
            // n = 4, score = 400
            //   6a6b                 | push                0x6b
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   5f                   | pop                 edi

        $sequence_6 = { 8dbd85feffff f3ab 66ab aa }
            // n = 4, score = 300
            //   8dbd85feffff         | lea                 edi, [ebp - 0x17b]
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al

        $sequence_7 = { 89848e14030000 8b86549f0000 40 8986549f0000 }
            // n = 4, score = 300
            //   89848e14030000       | mov                 dword ptr [esi + ecx*4 + 0x314], eax
            //   8b86549f0000         | mov                 eax, dword ptr [esi + 0x9f54]
            //   40                   | inc                 eax
            //   8986549f0000         | mov                 dword ptr [esi + 0x9f54], eax

        $sequence_8 = { 7411 8b08 890d???????? 8a5004 }
            // n = 4, score = 300
            //   7411                 | je                  0x13
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   890d????????         |                     
            //   8a5004               | mov                 dl, byte ptr [eax + 4]

        $sequence_9 = { ff75e8 e8???????? 8bce e8???????? }
            // n = 4, score = 300
            //   ff75e8               | push                dword ptr [ebp - 0x18]
            //   e8????????           |                     
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     

        $sequence_10 = { ff7510 ff75dc ff15???????? 85c0 7507 c745e401000000 }
            // n = 6, score = 300
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff75dc               | push                dword ptr [ebp - 0x24]
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7507                 | jne                 9
            //   c745e401000000       | mov                 dword ptr [ebp - 0x1c], 1

        $sequence_11 = { 6a6f 8bce e8???????? 5e }
            // n = 4, score = 300
            //   6a6f                 | push                0x6f
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   5e                   | pop                 esi

        $sequence_12 = { 68???????? 50 6802000080 e8???????? 83c41c 5f }
            // n = 6, score = 300
            //   68????????           |                     
            //   50                   | push                eax
            //   6802000080           | push                0x80000002
            //   e8????????           |                     
            //   83c41c               | add                 esp, 0x1c
            //   5f                   | pop                 edi

        $sequence_13 = { 68???????? 6a00 6a00 e8???????? 8b96549f0000 83c41c }
            // n = 6, score = 300
            //   68????????           |                     
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   e8????????           |                     
            //   8b96549f0000         | mov                 edx, dword ptr [esi + 0x9f54]
            //   83c41c               | add                 esp, 0x1c

        $sequence_14 = { e8???????? 8d85c0feffff 50 57 ff15???????? 8bf8 }
            // n = 6, score = 300
            //   e8????????           |                     
            //   8d85c0feffff         | lea                 eax, [ebp - 0x140]
            //   50                   | push                eax
            //   57                   | push                edi
            //   ff15????????         |                     
            //   8bf8                 | mov                 edi, eax

        $sequence_15 = { ff7508 ff15???????? 40 50 ff15???????? }
            // n = 5, score = 300
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff15????????         |                     
            //   40                   | inc                 eax
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_16 = { e8???????? 84c0 7505 83ceff eb32 }
            // n = 5, score = 300
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   7505                 | jne                 7
            //   83ceff               | or                  esi, 0xffffffff
            //   eb32                 | jmp                 0x34

        $sequence_17 = { e9???????? 8d45dc 50 681f000200 }
            // n = 4, score = 300
            //   e9????????           |                     
            //   8d45dc               | lea                 eax, [ebp - 0x24]
            //   50                   | push                eax
            //   681f000200           | push                0x2001f

        $sequence_18 = { 83c408 84c0 750b 5f 5e 33c0 }
            // n = 6, score = 300
            //   83c408               | add                 esp, 8
            //   84c0                 | test                al, al
            //   750b                 | jne                 0xd
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   33c0                 | xor                 eax, eax

        $sequence_19 = { ff15???????? 6a01 ff7620 ff15???????? 8b4e04 e8???????? 33c0 }
            // n = 7, score = 300
            //   ff15????????         |                     
            //   6a01                 | push                1
            //   ff7620               | push                dword ptr [esi + 0x20]
            //   ff15????????         |                     
            //   8b4e04               | mov                 ecx, dword ptr [esi + 4]
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax

        $sequence_20 = { 7509 5f 5e 5b 83c454 c20400 8d7901 }
            // n = 7, score = 300
            //   7509                 | jne                 0xb
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   83c454               | add                 esp, 0x54
            //   c20400               | ret                 4
            //   8d7901               | lea                 edi, [ecx + 1]

        $sequence_21 = { 83c40c 8d85b8feffff 50 8d85b4fdffff }
            // n = 4, score = 300
            //   83c40c               | add                 esp, 0xc
            //   8d85b8feffff         | lea                 eax, [ebp - 0x148]
            //   50                   | push                eax
            //   8d85b4fdffff         | lea                 eax, [ebp - 0x24c]

        $sequence_22 = { 55 8b6c2410 56 8b742418 57 3bee 8bf9 }
            // n = 7, score = 300
            //   55                   | push                ebp
            //   8b6c2410             | mov                 ebp, dword ptr [esp + 0x10]
            //   56                   | push                esi
            //   8b742418             | mov                 esi, dword ptr [esp + 0x18]
            //   57                   | push                edi
            //   3bee                 | cmp                 ebp, esi
            //   8bf9                 | mov                 edi, ecx

        $sequence_23 = { 6a00 e8???????? 8b8e549f0000 83c41c 89848e14030000 8b86549f0000 }
            // n = 6, score = 300
            //   6a00                 | push                0
            //   e8????????           |                     
            //   8b8e549f0000         | mov                 ecx, dword ptr [esi + 0x9f54]
            //   83c41c               | add                 esp, 0x1c
            //   89848e14030000       | mov                 dword ptr [esi + ecx*4 + 0x314], eax
            //   8b86549f0000         | mov                 eax, dword ptr [esi + 0x9f54]

        $sequence_24 = { ff15???????? 6800000002 6a00 6a00 ff15???????? }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   6800000002           | push                0x2000000
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   ff15????????         |                     

        $sequence_25 = { 83e9fc c7014c696272 83e9fc c70161727941 83e9fc }
            // n = 5, score = 200
            //   83e9fc               | sub                 ecx, -4
            //   c7014c696272         | mov                 dword ptr [ecx], 0x7262694c
            //   83e9fc               | sub                 ecx, -4
            //   c70161727941         | mov                 dword ptr [ecx], 0x41797261
            //   83e9fc               | sub                 ecx, -4

        $sequence_26 = { 8b760c 8b761c 8b4608 8b7e20 8b36 813f6b006500 }
            // n = 6, score = 200
            //   8b760c               | mov                 esi, dword ptr [esi + 0xc]
            //   8b761c               | mov                 esi, dword ptr [esi + 0x1c]
            //   8b4608               | mov                 eax, dword ptr [esi + 8]
            //   8b7e20               | mov                 edi, dword ptr [esi + 0x20]
            //   8b36                 | mov                 esi, dword ptr [esi]
            //   813f6b006500         | cmp                 dword ptr [edi], 0x65006b

        $sequence_27 = { 8b7e20 8b36 813f6b006500 7406 813f4b004500 75e8 }
            // n = 6, score = 200
            //   8b7e20               | mov                 edi, dword ptr [esi + 0x20]
            //   8b36                 | mov                 esi, dword ptr [esi]
            //   813f6b006500         | cmp                 dword ptr [edi], 0x65006b
            //   7406                 | je                  8
            //   813f4b004500         | cmp                 dword ptr [edi], 0x45004b
            //   75e8                 | jne                 0xffffffea

        $sequence_28 = { 0c90 898df4feffff 8b9578ffffff 52 8b85f4feffff 50 }
            // n = 6, score = 100
            //   0c90                 | or                  al, 0x90
            //   898df4feffff         | mov                 dword ptr [ebp - 0x10c], ecx
            //   8b9578ffffff         | mov                 edx, dword ptr [ebp - 0x88]
            //   52                   | push                edx
            //   8b85f4feffff         | mov                 eax, dword ptr [ebp - 0x10c]
            //   50                   | push                eax

        $sequence_29 = { 83c40c c7856cffffff00000000 eb0f 8b8d6cffffff 83c101 898d6cffffff 8b956cffffff }
            // n = 7, score = 100
            //   83c40c               | add                 esp, 0xc
            //   c7856cffffff00000000     | mov    dword ptr [ebp - 0x94], 0
            //   eb0f                 | jmp                 0x11
            //   8b8d6cffffff         | mov                 ecx, dword ptr [ebp - 0x94]
            //   83c101               | add                 ecx, 1
            //   898d6cffffff         | mov                 dword ptr [ebp - 0x94], ecx
            //   8b956cffffff         | mov                 edx, dword ptr [ebp - 0x94]

        $sequence_30 = { 75d4 817f0865006c00 7407 817f0845004c00 }
            // n = 4, score = 100
            //   75d4                 | jne                 0xffffffd6
            //   817f0865006c00       | cmp                 dword ptr [edi + 8], 0x6c0065
            //   7407                 | je                  9
            //   817f0845004c00       | cmp                 dword ptr [edi + 8], 0x4c0045

        $sequence_31 = { 83c101 898d6cffffff 8b956cffffff 3b5584 0f8d90000000 8b856cffffff 6bc028 }
            // n = 7, score = 100
            //   83c101               | add                 ecx, 1
            //   898d6cffffff         | mov                 dword ptr [ebp - 0x94], ecx
            //   8b956cffffff         | mov                 edx, dword ptr [ebp - 0x94]
            //   3b5584               | cmp                 edx, dword ptr [ebp - 0x7c]
            //   0f8d90000000         | jge                 0x96
            //   8b856cffffff         | mov                 eax, dword ptr [ebp - 0x94]
            //   6bc028               | imul                eax, eax, 0x28

        $sequence_32 = { ffb560ffffff ff55f4 e8???????? 6d 7973 7461 7274 }
            // n = 7, score = 100
            //   ffb560ffffff         | push                dword ptr [ebp - 0xa0]
            //   ff55f4               | call                dword ptr [ebp - 0xc]
            //   e8????????           |                     
            //   6d                   | insd                dword ptr es:[edi], dx
            //   7973                 | jns                 0x75
            //   7461                 | je                  0x63
            //   7274                 | jb                  0x76

    condition:
        7 of them and filesize < 357376
}