rule win_gozi_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-29"
        version = "1"
        description = "Detects win.gozi."
        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.gozi"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 6a00 8d4da0 e8???????? 50 e8???????? }
            // n = 6, score = 100
            //   51                   | push                ecx
            //   6a00                 | push                0
            //   8d4da0               | lea                 ecx, [ebp - 0x60]
            //   e8????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_1 = { 55 f79bfe7ca80d a7 ad b710 2dc7ce5bbb d6 }
            // n = 7, score = 100
            //   55                   | push                ebp
            //   f79bfe7ca80d         | neg                 dword ptr [ebx + 0xda87cfe]
            //   a7                   | cmpsd               dword ptr [esi], dword ptr es:[edi]
            //   ad                   | lodsd               eax, dword ptr [esi]
            //   b710                 | mov                 bh, 0x10
            //   2dc7ce5bbb           | sub                 eax, 0xbb5bcec7
            //   d6                   | salc                

        $sequence_2 = { 57 56 56 68???????? ff75dc ff15???????? }
            // n = 6, score = 100
            //   57                   | push                edi
            //   56                   | push                esi
            //   56                   | push                esi
            //   68????????           |                     
            //   ff75dc               | push                dword ptr [ebp - 0x24]
            //   ff15????????         |                     

        $sequence_3 = { 90 48 9e c1905ffb6daf6b }
            // n = 4, score = 100
            //   90                   | nop                 
            //   48                   | dec                 eax
            //   9e                   | sahf                
            //   c1905ffb6daf6b       | rcl                 dword ptr [eax - 0x509204a1], 0x6b

        $sequence_4 = { 8ee1 54 257c693a5c 48 fb }
            // n = 5, score = 100
            //   8ee1                 | mov                 fs, ecx
            //   54                   | push                esp
            //   257c693a5c           | and                 eax, 0x5c3a697c
            //   48                   | dec                 eax
            //   fb                   | sti                 

        $sequence_5 = { e9???????? 68b37418e6 ff35???????? e8???????? 894590 }
            // n = 5, score = 100
            //   e9????????           |                     
            //   68b37418e6           | push                0xe61874b3
            //   ff35????????         |                     
            //   e8????????           |                     
            //   894590               | mov                 dword ptr [ebp - 0x70], eax

        $sequence_6 = { 75e9 e8???????? 5b 5e c9 c20400 }
            // n = 6, score = 100
            //   75e9                 | jne                 0xffffffeb
            //   e8????????           |                     
            //   5b                   | pop                 ebx
            //   5e                   | pop                 esi
            //   c9                   | leave               
            //   c20400               | ret                 4

        $sequence_7 = { c0ee1e 0fca f6c172 8af4 c0eef6 }
            // n = 5, score = 100
            //   c0ee1e               | shr                 dh, 0x1e
            //   0fca                 | bswap               edx
            //   f6c172               | test                cl, 0x72
            //   8af4                 | mov                 dh, ah
            //   c0eef6               | shr                 dh, 0xf6

        $sequence_8 = { 10ba810b7f57 a4 8c6a38 55 f79bfe7ca80d a7 }
            // n = 6, score = 100
            //   10ba810b7f57         | adc                 byte ptr [edx + 0x577f0b81], bh
            //   a4                   | movsb               byte ptr es:[edi], byte ptr [esi]
            //   8c6a38               | mov                 word ptr [edx + 0x38], gs
            //   55                   | push                ebp
            //   f79bfe7ca80d         | neg                 dword ptr [ebx + 0xda87cfe]
            //   a7                   | cmpsd               dword ptr [esi], dword ptr es:[edi]

        $sequence_9 = { 6a29 ffb5d4f2ffff ff7508 ffd6 33c0 }
            // n = 5, score = 100
            //   6a29                 | push                0x29
            //   ffb5d4f2ffff         | push                dword ptr [ebp - 0xd2c]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ffd6                 | call                esi
            //   33c0                 | xor                 eax, eax

        $sequence_10 = { e8???????? 83c418 e9???????? 837d0803 751f }
            // n = 5, score = 100
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18
            //   e9????????           |                     
            //   837d0803             | cmp                 dword ptr [ebp + 8], 3
            //   751f                 | jne                 0x21

        $sequence_11 = { 5c 3c32 7e02 19c1 a6 }
            // n = 5, score = 100
            //   5c                   | pop                 esp
            //   3c32                 | cmp                 al, 0x32
            //   7e02                 | jle                 4
            //   19c1                 | sbb                 ecx, eax
            //   a6                   | cmpsb               byte ptr [esi], byte ptr es:[edi]

        $sequence_12 = { 51 51 8365fc00 56 8b7508 807e1400 }
            // n = 6, score = 100
            //   51                   | push                ecx
            //   51                   | push                ecx
            //   8365fc00             | and                 dword ptr [ebp - 4], 0
            //   56                   | push                esi
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   807e1400             | cmp                 byte ptr [esi + 0x14], 0

        $sequence_13 = { 751e ff45f4 25ff0f0000 0301 }
            // n = 4, score = 100
            //   751e                 | jne                 0x20
            //   ff45f4               | inc                 dword ptr [ebp - 0xc]
            //   25ff0f0000           | and                 eax, 0xfff
            //   0301                 | add                 eax, dword ptr [ecx]

        $sequence_14 = { ae 85729b 7a47 43 c571d5 }
            // n = 5, score = 100
            //   ae                   | scasb               al, byte ptr es:[edi]
            //   85729b               | test                dword ptr [edx - 0x65], esi
            //   7a47                 | jp                  0x49
            //   43                   | inc                 ebx
            //   c571d5               | lds                 esi, ptr [ecx - 0x2b]

        $sequence_15 = { 8b4de4 83c104 894de4 8b55e0 83c202 8955e0 8b45fc }
            // n = 7, score = 100
            //   8b4de4               | mov                 ecx, dword ptr [ebp - 0x1c]
            //   83c104               | add                 ecx, 4
            //   894de4               | mov                 dword ptr [ebp - 0x1c], ecx
            //   8b55e0               | mov                 edx, dword ptr [ebp - 0x20]
            //   83c202               | add                 edx, 2
            //   8955e0               | mov                 dword ptr [ebp - 0x20], edx
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]

        $sequence_16 = { 0fb3ce feca 80ca32 69f1a6d150d3 }
            // n = 4, score = 100
            //   0fb3ce               | btr                 esi, ecx
            //   feca                 | dec                 dl
            //   80ca32               | or                  dl, 0x32
            //   69f1a6d150d3         | imul                esi, ecx, 0xd350d1a6

        $sequence_17 = { ff750c ff7508 e8???????? 683e010000 6a40 e8???????? }
            // n = 6, score = 100
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   683e010000           | push                0x13e
            //   6a40                 | push                0x40
            //   e8????????           |                     

        $sequence_18 = { 8945f0 eb02 33d2 8b4f15 }
            // n = 4, score = 100
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   eb02                 | jmp                 4
            //   33d2                 | xor                 edx, edx
            //   8b4f15               | mov                 ecx, dword ptr [edi + 0x15]

        $sequence_19 = { 12a502b346d1 41 b87e8da638 e022 3a56b9 036890 2b02 }
            // n = 7, score = 100
            //   12a502b346d1         | adc                 ah, byte ptr [ebp - 0x2eb94cfe]
            //   41                   | inc                 ecx
            //   b87e8da638           | mov                 eax, 0x38a68d7e
            //   e022                 | loopne              0x24
            //   3a56b9               | cmp                 dl, byte ptr [esi - 0x47]
            //   036890               | add                 ebp, dword ptr [eax - 0x70]
            //   2b02                 | sub                 eax, dword ptr [edx]

        $sequence_20 = { 8d4dbc 51 50 ff15???????? 8945dc 83f8ff 0f84b9feffff }
            // n = 7, score = 100
            //   8d4dbc               | lea                 ecx, [ebp - 0x44]
            //   51                   | push                ecx
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8945dc               | mov                 dword ptr [ebp - 0x24], eax
            //   83f8ff               | cmp                 eax, -1
            //   0f84b9feffff         | je                  0xfffffebf

        $sequence_21 = { ff4508 837d080c 894dec 8d8c0de4feffff 8a11 8810 }
            // n = 6, score = 100
            //   ff4508               | inc                 dword ptr [ebp + 8]
            //   837d080c             | cmp                 dword ptr [ebp + 8], 0xc
            //   894dec               | mov                 dword ptr [ebp - 0x14], ecx
            //   8d8c0de4feffff       | lea                 ecx, [ebp + ecx - 0x11c]
            //   8a11                 | mov                 dl, byte ptr [ecx]
            //   8810                 | mov                 byte ptr [eax], dl

        $sequence_22 = { 02738f 1da2c9dde2 f4 16 ee }
            // n = 5, score = 100
            //   02738f               | add                 dh, byte ptr [ebx - 0x71]
            //   1da2c9dde2           | sbb                 eax, 0xe2ddc9a2
            //   f4                   | hlt                 
            //   16                   | push                ss
            //   ee                   | out                 dx, al

        $sequence_23 = { 8dbdc0feffff f3ab 33f6 89b5b8feffff 8975fc 684fd1c15b ff35???????? }
            // n = 7, score = 100
            //   8dbdc0feffff         | lea                 edi, [ebp - 0x140]
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   33f6                 | xor                 esi, esi
            //   89b5b8feffff         | mov                 dword ptr [ebp - 0x148], esi
            //   8975fc               | mov                 dword ptr [ebp - 4], esi
            //   684fd1c15b           | push                0x5bc1d14f
            //   ff35????????         |                     

        $sequence_24 = { 59 7e14 83c606 8d0c30 3b4d10 }
            // n = 5, score = 100
            //   59                   | pop                 ecx
            //   7e14                 | jle                 0x16
            //   83c606               | add                 esi, 6
            //   8d0c30               | lea                 ecx, [eax + esi]
            //   3b4d10               | cmp                 ecx, dword ptr [ebp + 0x10]

        $sequence_25 = { 0f85c1000000 889d94fdffff 6a40 59 }
            // n = 4, score = 100
            //   0f85c1000000         | jne                 0xc7
            //   889d94fdffff         | mov                 byte ptr [ebp - 0x26c], bl
            //   6a40                 | push                0x40
            //   59                   | pop                 ecx

        $sequence_26 = { 57 894dec a1???????? 8b0d???????? 6a00 68f80a0000 }
            // n = 6, score = 100
            //   57                   | push                edi
            //   894dec               | mov                 dword ptr [ebp - 0x14], ecx
            //   a1????????           |                     
            //   8b0d????????         |                     
            //   6a00                 | push                0
            //   68f80a0000           | push                0xaf8

        $sequence_27 = { 4e 0fbef4 0fbdf1 0fce 2af4 4e }
            // n = 6, score = 100
            //   4e                   | dec                 esi
            //   0fbef4               | movsx               esi, ah
            //   0fbdf1               | bsr                 esi, ecx
            //   0fce                 | bswap               esi
            //   2af4                 | sub                 dh, ah
            //   4e                   | dec                 esi

        $sequence_28 = { 894208 8d45dc 50 8b4d08 }
            // n = 4, score = 100
            //   894208               | mov                 dword ptr [edx + 8], eax
            //   8d45dc               | lea                 eax, [ebp - 0x24]
            //   50                   | push                eax
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]

        $sequence_29 = { c3 8b4134 8b4924 8b00 }
            // n = 4, score = 100
            //   c3                   | ret                 
            //   8b4134               | mov                 eax, dword ptr [ecx + 0x34]
            //   8b4924               | mov                 ecx, dword ptr [ecx + 0x24]
            //   8b00                 | mov                 eax, dword ptr [eax]

        $sequence_30 = { feca 0fca 80ca4a 0fb3ce }
            // n = 4, score = 100
            //   feca                 | dec                 dl
            //   0fca                 | bswap               edx
            //   80ca4a               | or                  dl, 0x4a
            //   0fb3ce               | btr                 esi, ecx

    condition:
        7 of them and filesize < 568320
}