rule win_glooxmail_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        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 = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { 81cb00080000 57 8d8d98feffff 895dec e8???????? 8d8d28feffff 51 }
            // n = 7, score = 100
            //   81cb00080000         | or                  ebx, 0x800
            //   57                   | push                edi
            //   8d8d98feffff         | lea                 ecx, [ebp - 0x168]
            //   895dec               | mov                 dword ptr [ebp - 0x14], ebx
            //   e8????????           |                     
            //   8d8d28feffff         | lea                 ecx, [ebp - 0x1d8]
            //   51                   | push                ecx

        $sequence_1 = { e8???????? 33f6 c645fc01 46 68???????? 8d8d7cffffff 8975f0 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   33f6                 | xor                 esi, esi
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1
            //   46                   | inc                 esi
            //   68????????           |                     
            //   8d8d7cffffff         | lea                 ecx, [ebp - 0x84]
            //   8975f0               | mov                 dword ptr [ebp - 0x10], esi

        $sequence_2 = { 8d742424 e8???????? 8b4c241c e9???????? 8ac3 eb02 }
            // n = 6, score = 100
            //   8d742424             | lea                 esi, [esp + 0x24]
            //   e8????????           |                     
            //   8b4c241c             | mov                 ecx, dword ptr [esp + 0x1c]
            //   e9????????           |                     
            //   8ac3                 | mov                 al, bl
            //   eb02                 | jmp                 4

        $sequence_3 = { e8???????? c78424600800005e000000 8b07 8bcf ff506c 8b16 058c000000 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   c78424600800005e000000     | mov    dword ptr [esp + 0x860], 0x5e
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   8bcf                 | mov                 ecx, edi
            //   ff506c               | call                dword ptr [eax + 0x6c]
            //   8b16                 | mov                 edx, dword ptr [esi]
            //   058c000000           | add                 eax, 0x8c

        $sequence_4 = { 8d4dd8 e8???????? 8b7d54 395f54 7452 56 e8???????? }
            // n = 7, score = 100
            //   8d4dd8               | lea                 ecx, [ebp - 0x28]
            //   e8????????           |                     
            //   8b7d54               | mov                 edi, dword ptr [ebp + 0x54]
            //   395f54               | cmp                 dword ptr [edi + 0x54], ebx
            //   7452                 | je                  0x54
            //   56                   | push                esi
            //   e8????????           |                     

        $sequence_5 = { 33c5 89853c020000 6a20 b8???????? e8???????? 8b8548020000 8bf1 }
            // n = 7, score = 100
            //   33c5                 | xor                 eax, ebp
            //   89853c020000         | mov                 dword ptr [ebp + 0x23c], eax
            //   6a20                 | push                0x20
            //   b8????????           |                     
            //   e8????????           |                     
            //   8b8548020000         | mov                 eax, dword ptr [ebp + 0x248]
            //   8bf1                 | mov                 esi, ecx

        $sequence_6 = { ff7020 8b4c2414 ff7508 ff17 eb46 8b450c 83e800 }
            // n = 7, score = 100
            //   ff7020               | push                dword ptr [eax + 0x20]
            //   8b4c2414             | mov                 ecx, dword ptr [esp + 0x14]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff17                 | call                dword ptr [edi]
            //   eb46                 | jmp                 0x48
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   83e800               | sub                 eax, 0

        $sequence_7 = { 8b8544a30100 898518830000 8d4588 89851c830000 8d4584 898528830000 33c0 }
            // n = 7, score = 100
            //   8b8544a30100         | mov                 eax, dword ptr [ebp + 0x1a344]
            //   898518830000         | mov                 dword ptr [ebp + 0x8318], eax
            //   8d4588               | lea                 eax, [ebp - 0x78]
            //   89851c830000         | mov                 dword ptr [ebp + 0x831c], eax
            //   8d4584               | lea                 eax, [ebp - 0x7c]
            //   898528830000         | mov                 dword ptr [ebp + 0x8328], eax
            //   33c0                 | xor                 eax, eax

        $sequence_8 = { ff502c 8bcb e8???????? 84c0 7504 b301 eb02 }
            // n = 7, score = 100
            //   ff502c               | call                dword ptr [eax + 0x2c]
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   7504                 | jne                 6
            //   b301                 | mov                 bl, 1
            //   eb02                 | jmp                 4

        $sequence_9 = { 84c0 7437 68ec000000 e8???????? 59 8945d0 c645fc03 }
            // n = 7, score = 100
            //   84c0                 | test                al, al
            //   7437                 | je                  0x39
            //   68ec000000           | push                0xec
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8945d0               | mov                 dword ptr [ebp - 0x30], eax
            //   c645fc03             | mov                 byte ptr [ebp - 4], 3

    condition:
        7 of them and filesize < 761856
}