rule win_shareip_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.shareip."
        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.shareip"
        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 = { 8a542417 8a042f 0fbec8 83e920 0f841a010000 83e902 0f848c000000 }
            // n = 7, score = 100
            //   8a542417             | mov                 dl, byte ptr [esp + 0x17]
            //   8a042f               | mov                 al, byte ptr [edi + ebp]
            //   0fbec8               | movsx               ecx, al
            //   83e920               | sub                 ecx, 0x20
            //   0f841a010000         | je                  0x120
            //   83e902               | sub                 ecx, 2
            //   0f848c000000         | je                  0x92

        $sequence_1 = { 8d442410 50 53 6a00 6a00 68???????? bf20000000 }
            // n = 7, score = 100
            //   8d442410             | lea                 eax, [esp + 0x10]
            //   50                   | push                eax
            //   53                   | push                ebx
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   68????????           |                     
            //   bf20000000           | mov                 edi, 0x20

        $sequence_2 = { 059979825a 03d0 8bc7 c1c20d 33c6 8b29 33c2 }
            // n = 7, score = 100
            //   059979825a           | add                 eax, 0x5a827999
            //   03d0                 | add                 edx, eax
            //   8bc7                 | mov                 eax, edi
            //   c1c20d               | rol                 edx, 0xd
            //   33c6                 | xor                 eax, esi
            //   8b29                 | mov                 ebp, dword ptr [ecx]
            //   33c2                 | xor                 eax, edx

        $sequence_3 = { e8???????? 6a01 c645fc03 8b4814 68???????? 51 6a00 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   6a01                 | push                1
            //   c645fc03             | mov                 byte ptr [ebp - 4], 3
            //   8b4814               | mov                 ecx, dword ptr [eax + 0x14]
            //   68????????           |                     
            //   51                   | push                ecx
            //   6a00                 | push                0

        $sequence_4 = { 57 52 50 894638 e8???????? 83c410 8bc6 }
            // n = 7, score = 100
            //   57                   | push                edi
            //   52                   | push                edx
            //   50                   | push                eax
            //   894638               | mov                 dword ptr [esi + 0x38], eax
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   8bc6                 | mov                 eax, esi

        $sequence_5 = { 8b85d0000000 3bc6 740f 50 e8???????? 83c404 89b5d0000000 }
            // n = 7, score = 100
            //   8b85d0000000         | mov                 eax, dword ptr [ebp + 0xd0]
            //   3bc6                 | cmp                 eax, esi
            //   740f                 | je                  0x11
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   89b5d0000000         | mov                 dword ptr [ebp + 0xd0], esi

        $sequence_6 = { 83e3fc 83c318 c7841c28010000ffffffff 83c308 0fb6c3 50 885e1e }
            // n = 7, score = 100
            //   83e3fc               | and                 ebx, 0xfffffffc
            //   83c318               | add                 ebx, 0x18
            //   c7841c28010000ffffffff     | mov    dword ptr [esp + ebx + 0x128], 0xffffffff
            //   83c308               | add                 ebx, 8
            //   0fb6c3               | movzx               eax, bl
            //   50                   | push                eax
            //   885e1e               | mov                 byte ptr [esi + 0x1e], bl

        $sequence_7 = { 750c c745ec04000000 e9???????? 8b0b 8b4904 8d45e0 }
            // n = 6, score = 100
            //   750c                 | jne                 0xe
            //   c745ec04000000       | mov                 dword ptr [ebp - 0x14], 4
            //   e9????????           |                     
            //   8b0b                 | mov                 ecx, dword ptr [ebx]
            //   8b4904               | mov                 ecx, dword ptr [ecx + 4]
            //   8d45e0               | lea                 eax, [ebp - 0x20]

        $sequence_8 = { bf01000000 e8???????? 8bd0 8bcb e8???????? 85c0 }
            // n = 6, score = 100
            //   bf01000000           | mov                 edi, 1
            //   e8????????           |                     
            //   8bd0                 | mov                 edx, eax
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     
            //   85c0                 | test                eax, eax

        $sequence_9 = { 7410 8b542434 8b02 8d4c2434 ffd0 8b44243c 396c2440 }
            // n = 7, score = 100
            //   7410                 | je                  0x12
            //   8b542434             | mov                 edx, dword ptr [esp + 0x34]
            //   8b02                 | mov                 eax, dword ptr [edx]
            //   8d4c2434             | lea                 ecx, [esp + 0x34]
            //   ffd0                 | call                eax
            //   8b44243c             | mov                 eax, dword ptr [esp + 0x3c]
            //   396c2440             | cmp                 dword ptr [esp + 0x40], ebp

    condition:
        7 of them and filesize < 811008
}