rule win_glooxmail_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.glooxmail."
        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.glooxmail"
        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 = { 894d20 8b4004 8b4d94 894524 8b01 83c410 ff5004 }
            // n = 7, score = 100
            //   894d20               | mov                 dword ptr [ebp + 0x20], ecx
            //   8b4004               | mov                 eax, dword ptr [eax + 4]
            //   8b4d94               | mov                 ecx, dword ptr [ebp - 0x6c]
            //   894524               | mov                 dword ptr [ebp + 0x24], eax
            //   8b01                 | mov                 eax, dword ptr [ecx]
            //   83c410               | add                 esp, 0x10
            //   ff5004               | call                dword ptr [eax + 4]

        $sequence_1 = { 3918 7507 c745f801000000 39583c 7507 8b08 03c8 }
            // n = 7, score = 100
            //   3918                 | cmp                 dword ptr [eax], ebx
            //   7507                 | jne                 9
            //   c745f801000000       | mov                 dword ptr [ebp - 8], 1
            //   39583c               | cmp                 dword ptr [eax + 0x3c], ebx
            //   7507                 | jne                 9
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   03c8                 | add                 ecx, eax

        $sequence_2 = { 8d44244c 50 e8???????? 83c420 8bf8 c78424c800000001000000 834c241002 }
            // n = 7, score = 100
            //   8d44244c             | lea                 eax, [esp + 0x4c]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c420               | add                 esp, 0x20
            //   8bf8                 | mov                 edi, eax
            //   c78424c800000001000000     | mov    dword ptr [esp + 0xc8], 1
            //   834c241002           | or                  dword ptr [esp + 0x10], 2

        $sequence_3 = { 8d8d04ffffff c645fc10 8b06 51 8bce ff5010 }
            // n = 6, score = 100
            //   8d8d04ffffff         | lea                 ecx, [ebp - 0xfc]
            //   c645fc10             | mov                 byte ptr [ebp - 4], 0x10
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   51                   | push                ecx
            //   8bce                 | mov                 ecx, esi
            //   ff5010               | call                dword ptr [eax + 0x10]

        $sequence_4 = { 50 8d8f8c000000 e8???????? 56 53 50 8d4f70 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   8d8f8c000000         | lea                 ecx, [edi + 0x8c]
            //   e8????????           |                     
            //   56                   | push                esi
            //   53                   | push                ebx
            //   50                   | push                eax
            //   8d4f70               | lea                 ecx, [edi + 0x70]

        $sequence_5 = { 47 68???????? 8d8d30ffffff 897dd0 e8???????? 6a03 }
            // n = 6, score = 100
            //   47                   | inc                 edi
            //   68????????           |                     
            //   8d8d30ffffff         | lea                 ecx, [ebp - 0xd0]
            //   897dd0               | mov                 dword ptr [ebp - 0x30], edi
            //   e8????????           |                     
            //   6a03                 | push                3

        $sequence_6 = { 68ff7f0000 8d85fd7fffff 6a00 50 8bf1 8bfa c685fc7fffff00 }
            // n = 7, score = 100
            //   68ff7f0000           | push                0x7fff
            //   8d85fd7fffff         | lea                 eax, [ebp - 0x8003]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   8bf1                 | mov                 esi, ecx
            //   8bfa                 | mov                 edi, edx
            //   c685fc7fffff00       | mov                 byte ptr [ebp - 0x8004], 0

        $sequence_7 = { 397714 7468 3bde 7464 83fbff 745f 53 }
            // n = 7, score = 100
            //   397714               | cmp                 dword ptr [edi + 0x14], esi
            //   7468                 | je                  0x6a
            //   3bde                 | cmp                 ebx, esi
            //   7464                 | je                  0x66
            //   83fbff               | cmp                 ebx, -1
            //   745f                 | je                  0x61
            //   53                   | push                ebx

        $sequence_8 = { 8b4558 8b4008 8b30 8b07 53 ff506c 50 }
            // n = 7, score = 100
            //   8b4558               | mov                 eax, dword ptr [ebp + 0x58]
            //   8b4008               | mov                 eax, dword ptr [eax + 8]
            //   8b30                 | mov                 esi, dword ptr [eax]
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   53                   | push                ebx
            //   ff506c               | call                dword ptr [eax + 0x6c]
            //   50                   | push                eax

        $sequence_9 = { 8d45d8 50 e8???????? 59 59 6aff 53 }
            // n = 7, score = 100
            //   8d45d8               | lea                 eax, [ebp - 0x28]
            //   50                   | push                eax
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   6aff                 | push                -1
            //   53                   | push                ebx

    condition:
        7 of them and filesize < 761856
}