rule win_glooxmail_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "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 = { e8???????? 83c420 6aff 53 8bf7 c745fc02000000 e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c420               | add                 esp, 0x20
            //   6aff                 | push                -1
            //   53                   | push                ebx
            //   8bf7                 | mov                 esi, edi
            //   c745fc02000000       | mov                 dword ptr [ebp - 4], 2
            //   e8????????           |                     

        $sequence_1 = { aa 8d842471020000 53 50 889c2478020000 e8???????? 8d8600020000 }
            // n = 7, score = 100
            //   aa                   | stosb               byte ptr es:[edi], al
            //   8d842471020000       | lea                 eax, [esp + 0x271]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   889c2478020000       | mov                 byte ptr [esp + 0x278], bl
            //   e8????????           |                     
            //   8d8600020000         | lea                 eax, [esi + 0x200]

        $sequence_2 = { b001 c20400 55 8dac24fcfffeff b804000100 e8???????? }
            // n = 6, score = 100
            //   b001                 | mov                 al, 1
            //   c20400               | ret                 4
            //   55                   | push                ebp
            //   8dac24fcfffeff       | lea                 ebp, [esp - 0x10004]
            //   b804000100           | mov                 eax, 0x10004
            //   e8????????           |                     

        $sequence_3 = { 68???????? 8d4d1c e8???????? c645fc01 68???????? 8d4d00 }
            // n = 6, score = 100
            //   68????????           |                     
            //   8d4d1c               | lea                 ecx, [ebp + 0x1c]
            //   e8????????           |                     
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1
            //   68????????           |                     
            //   8d4d00               | lea                 ecx, [ebp]

        $sequence_4 = { 33db 43 e8???????? ff45f0 8b45f0 3b45e4 }
            // n = 6, score = 100
            //   33db                 | xor                 ebx, ebx
            //   43                   | inc                 ebx
            //   e8????????           |                     
            //   ff45f0               | inc                 dword ptr [ebp - 0x10]
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]
            //   3b45e4               | cmp                 eax, dword ptr [ebp - 0x1c]

        $sequence_5 = { 8d8d54ffffff e8???????? e9???????? 83c007 50 89857cfeffff 68???????? }
            // n = 7, score = 100
            //   8d8d54ffffff         | lea                 ecx, [ebp - 0xac]
            //   e8????????           |                     
            //   e9????????           |                     
            //   83c007               | add                 eax, 7
            //   50                   | push                eax
            //   89857cfeffff         | mov                 dword ptr [ebp - 0x184], eax
            //   68????????           |                     

        $sequence_6 = { 8b4d08 85c9 741b 8b01 57 ff5064 8bf8 }
            // n = 7, score = 100
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   85c9                 | test                ecx, ecx
            //   741b                 | je                  0x1d
            //   8b01                 | mov                 eax, dword ptr [ecx]
            //   57                   | push                edi
            //   ff5064               | call                dword ptr [eax + 0x64]
            //   8bf8                 | mov                 edi, eax

        $sequence_7 = { 8d5920 8bc3 e8???????? 8945fc 85db 7505 e8???????? }
            // n = 7, score = 100
            //   8d5920               | lea                 ebx, [ecx + 0x20]
            //   8bc3                 | mov                 eax, ebx
            //   e8????????           |                     
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   85db                 | test                ebx, ebx
            //   7505                 | jne                 7
            //   e8????????           |                     

        $sequence_8 = { c645fc01 85f6 742c 8b4508 8906 8b450c 894604 }
            // n = 7, score = 100
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1
            //   85f6                 | test                esi, esi
            //   742c                 | je                  0x2e
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8906                 | mov                 dword ptr [esi], eax
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   894604               | mov                 dword ptr [esi + 4], eax

        $sequence_9 = { 68???????? 8d4db4 c645fc07 e8???????? 8d4d98 51 8d4dd0 }
            // n = 7, score = 100
            //   68????????           |                     
            //   8d4db4               | lea                 ecx, [ebp - 0x4c]
            //   c645fc07             | mov                 byte ptr [ebp - 4], 7
            //   e8????????           |                     
            //   8d4d98               | lea                 ecx, [ebp - 0x68]
            //   51                   | push                ecx
            //   8d4dd0               | lea                 ecx, [ebp - 0x30]

    condition:
        7 of them and filesize < 761856
}