rule win_glooxmail_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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 = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 760a 50 6a00 e8???????? eb0a }
            // n = 5, score = 100
            //   760a                 | jbe                 0xc
            //   50                   | push                eax
            //   6a00                 | push                0
            //   e8????????           |                     
            //   eb0a                 | jmp                 0xc

        $sequence_1 = { 895dec e8???????? 6a03 5b c745fc02000000 57 8d8d5cffffff }
            // n = 7, score = 100
            //   895dec               | mov                 dword ptr [ebp - 0x14], ebx
            //   e8????????           |                     
            //   6a03                 | push                3
            //   5b                   | pop                 ebx
            //   c745fc02000000       | mov                 dword ptr [ebp - 4], 2
            //   57                   | push                edi
            //   8d8d5cffffff         | lea                 ecx, [ebp - 0xa4]

        $sequence_2 = { 46 50 8bcb 8975fc e8???????? 57 56 }
            // n = 7, score = 100
            //   46                   | inc                 esi
            //   50                   | push                eax
            //   8bcb                 | mov                 ecx, ebx
            //   8975fc               | mov                 dword ptr [ebp - 4], esi
            //   e8????????           |                     
            //   57                   | push                edi
            //   56                   | push                esi

        $sequence_3 = { 8d842438010000 c784246408000043000000 8b7c2428 814c241400000800 50 ff74241c }
            // n = 6, score = 100
            //   8d842438010000       | lea                 eax, [esp + 0x138]
            //   c784246408000043000000     | mov    dword ptr [esp + 0x864], 0x43
            //   8b7c2428             | mov                 edi, dword ptr [esp + 0x28]
            //   814c241400000800     | or                  dword ptr [esp + 0x14], 0x80000
            //   50                   | push                eax
            //   ff74241c             | push                dword ptr [esp + 0x1c]

        $sequence_4 = { 0f85ec020000 8b03 8bcb ff5060 33f6 46 3bc6 }
            // n = 7, score = 100
            //   0f85ec020000         | jne                 0x2f2
            //   8b03                 | mov                 eax, dword ptr [ebx]
            //   8bcb                 | mov                 ecx, ebx
            //   ff5060               | call                dword ptr [eax + 0x60]
            //   33f6                 | xor                 esi, esi
            //   46                   | inc                 esi
            //   3bc6                 | cmp                 eax, esi

        $sequence_5 = { 33ff 57 ff15???????? 85c0 7503 40 eb42 }
            // n = 7, score = 100
            //   33ff                 | xor                 edi, edi
            //   57                   | push                edi
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7503                 | jne                 5
            //   40                   | inc                 eax
            //   eb42                 | jmp                 0x44

        $sequence_6 = { 8d8fd4030000 e8???????? 8d87b4030000 50 c645fc17 e8???????? 8d8f84030000 }
            // n = 7, score = 100
            //   8d8fd4030000         | lea                 ecx, [edi + 0x3d4]
            //   e8????????           |                     
            //   8d87b4030000         | lea                 eax, [edi + 0x3b4]
            //   50                   | push                eax
            //   c645fc17             | mov                 byte ptr [ebp - 4], 0x17
            //   e8????????           |                     
            //   8d8f84030000         | lea                 ecx, [edi + 0x384]

        $sequence_7 = { 53 6a01 8d8c249c050000 e8???????? 6880000000 e8???????? 59 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   6a01                 | push                1
            //   8d8c249c050000       | lea                 ecx, [esp + 0x59c]
            //   e8????????           |                     
            //   6880000000           | push                0x80
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_8 = { 742b 8d9028010000 8d8decfdffff e8???????? c745fc11000000 8b16 50 }
            // n = 7, score = 100
            //   742b                 | je                  0x2d
            //   8d9028010000         | lea                 edx, [eax + 0x128]
            //   8d8decfdffff         | lea                 ecx, [ebp - 0x214]
            //   e8????????           |                     
            //   c745fc11000000       | mov                 dword ptr [ebp - 4], 0x11
            //   8b16                 | mov                 edx, dword ptr [esi]
            //   50                   | push                eax

        $sequence_9 = { 8bcb ff9084000000 89442418 c68424a80000000a 8b03 8bcb ff506c }
            // n = 7, score = 100
            //   8bcb                 | mov                 ecx, ebx
            //   ff9084000000         | call                dword ptr [eax + 0x84]
            //   89442418             | mov                 dword ptr [esp + 0x18], eax
            //   c68424a80000000a     | mov                 byte ptr [esp + 0xa8], 0xa
            //   8b03                 | mov                 eax, dword ptr [ebx]
            //   8bcb                 | mov                 ecx, ebx
            //   ff506c               | call                dword ptr [eax + 0x6c]

    condition:
        7 of them and filesize < 761856
}