rule win_webc2_ugx_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.webc2_ugx."
        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.webc2_ugx"
        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 = { 8d8628070000 50 57 ff969c060000 }
            // n = 4, score = 100
            //   8d8628070000         | lea                 eax, [esi + 0x728]
            //   50                   | push                eax
            //   57                   | push                edi
            //   ff969c060000         | call                dword ptr [esi + 0x69c]

        $sequence_1 = { 83c418 8d45f0 50 8d45ac 50 53 53 }
            // n = 7, score = 100
            //   83c418               | add                 esp, 0x18
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   8d45ac               | lea                 eax, [ebp - 0x54]
            //   50                   | push                eax
            //   53                   | push                ebx
            //   53                   | push                ebx

        $sequence_2 = { ff55f4 e9???????? 53 68000100c4 53 8d85ccfeffff }
            // n = 6, score = 100
            //   ff55f4               | call                dword ptr [ebp - 0xc]
            //   e9????????           |                     
            //   53                   | push                ebx
            //   68000100c4           | push                0xc4000100
            //   53                   | push                ebx
            //   8d85ccfeffff         | lea                 eax, [ebp - 0x134]

        $sequence_3 = { 8d8524ffffff 50 53 53 6a10 6a01 53 }
            // n = 7, score = 100
            //   8d8524ffffff         | lea                 eax, [ebp - 0xdc]
            //   50                   | push                eax
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   6a10                 | push                0x10
            //   6a01                 | push                1
            //   53                   | push                ebx

        $sequence_4 = { eb1c 8d86ee0c0000 50 8d85e8feffff 50 }
            // n = 5, score = 100
            //   eb1c                 | jmp                 0x1e
            //   8d86ee0c0000         | lea                 eax, [esi + 0xcee]
            //   50                   | push                eax
            //   8d85e8feffff         | lea                 eax, [ebp - 0x118]
            //   50                   | push                eax

        $sequence_5 = { 83600400 c3 83790400 7508 6a00 e8???????? 59 }
            // n = 7, score = 100
            //   83600400             | and                 dword ptr [eax + 4], 0
            //   c3                   | ret                 
            //   83790400             | cmp                 dword ptr [ecx + 4], 0
            //   7508                 | jne                 0xa
            //   6a00                 | push                0
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_6 = { 895dfc bf???????? 897ddc be???????? }
            // n = 4, score = 100
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   bf????????           |                     
            //   897ddc               | mov                 dword ptr [ebp - 0x24], edi
            //   be????????           |                     

        $sequence_7 = { ff969c060000 3bc3 894588 0f84bf050000 8d868e0a0000 50 57 }
            // n = 7, score = 100
            //   ff969c060000         | call                dword ptr [esi + 0x69c]
            //   3bc3                 | cmp                 eax, ebx
            //   894588               | mov                 dword ptr [ebp - 0x78], eax
            //   0f84bf050000         | je                  0x5c5
            //   8d868e0a0000         | lea                 eax, [esi + 0xa8e]
            //   50                   | push                eax
            //   57                   | push                edi

        $sequence_8 = { 3bc3 8945a4 0f84a6050000 8d8640080000 50 }
            // n = 5, score = 100
            //   3bc3                 | cmp                 eax, ebx
            //   8945a4               | mov                 dword ptr [ebp - 0x5c], eax
            //   0f84a6050000         | je                  0x5ac
            //   8d8640080000         | lea                 eax, [esi + 0x840]
            //   50                   | push                eax

        $sequence_9 = { 8d85a8feffff 68???????? 50 ffd6 8d85a8feffff 68???????? 50 }
            // n = 7, score = 100
            //   8d85a8feffff         | lea                 eax, [ebp - 0x158]
            //   68????????           |                     
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   8d85a8feffff         | lea                 eax, [ebp - 0x158]
            //   68????????           |                     
            //   50                   | push                eax

    condition:
        7 of them and filesize < 57344
}