rule win_glooxmail_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 8b4d94 894524 8b01 83c410 ff5004 6a01 884594 }
            // n = 7, score = 100
            //   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]
            //   6a01                 | push                1
            //   884594               | mov                 byte ptr [ebp - 0x6c], al

        $sequence_1 = { 50 51 b848800000 e8???????? a1???????? 33c4 89842444800000 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   51                   | push                ecx
            //   b848800000           | mov                 eax, 0x8048
            //   e8????????           |                     
            //   a1????????           |                     
            //   33c4                 | xor                 eax, esp
            //   89842444800000       | mov                 dword ptr [esp + 0x8044], eax

        $sequence_2 = { 68???????? 64a100000000 50 83ec74 a1???????? 33c5 898500000100 }
            // n = 7, score = 100
            //   68????????           |                     
            //   64a100000000         | mov                 eax, dword ptr fs:[0]
            //   50                   | push                eax
            //   83ec74               | sub                 esp, 0x74
            //   a1????????           |                     
            //   33c5                 | xor                 eax, ebp
            //   898500000100         | mov                 dword ptr [ebp + 0x10000], eax

        $sequence_3 = { e8???????? eb27 83781810 7205 8b4804 eb03 8d4804 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   eb27                 | jmp                 0x29
            //   83781810             | cmp                 dword ptr [eax + 0x18], 0x10
            //   7205                 | jb                  7
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]
            //   eb03                 | jmp                 5
            //   8d4804               | lea                 ecx, [eax + 4]

        $sequence_4 = { 85c0 7519 a1???????? 85c0 7424 50 ff15???????? }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   7519                 | jne                 0x1b
            //   a1????????           |                     
            //   85c0                 | test                eax, eax
            //   7424                 | je                  0x26
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_5 = { 8d4d98 c645fc03 e8???????? 56 8d4dd0 e8???????? 56 }
            // n = 7, score = 100
            //   8d4d98               | lea                 ecx, [ebp - 0x68]
            //   c645fc03             | mov                 byte ptr [ebp - 4], 3
            //   e8????????           |                     
            //   56                   | push                esi
            //   8d4dd0               | lea                 ecx, [ebp - 0x30]
            //   e8????????           |                     
            //   56                   | push                esi

        $sequence_6 = { 8b4d08 81c19c020000 e9???????? 8b4d08 81c1b8020000 e9???????? 8b4d08 }
            // n = 7, score = 100
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   81c19c020000         | add                 ecx, 0x29c
            //   e9????????           |                     
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   81c1b8020000         | add                 ecx, 0x2b8
            //   e9????????           |                     
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]

        $sequence_7 = { c700???????? c74004???????? c74008???????? c7400cb04a4400 c74010bc4a4400 c74014c84a4400 c74018d44a4400 }
            // n = 7, score = 100
            //   c700????????         |                     
            //   c74004????????       |                     
            //   c74008????????       |                     
            //   c7400cb04a4400       | mov                 dword ptr [eax + 0xc], 0x444ab0
            //   c74010bc4a4400       | mov                 dword ptr [eax + 0x10], 0x444abc
            //   c74014c84a4400       | mov                 dword ptr [eax + 0x14], 0x444ac8
            //   c74018d44a4400       | mov                 dword ptr [eax + 0x18], 0x444ad4

        $sequence_8 = { 834dfcff 845dec 740b 6a00 53 8d4dcc e8???????? }
            // n = 7, score = 100
            //   834dfcff             | or                  dword ptr [ebp - 4], 0xffffffff
            //   845dec               | test                byte ptr [ebp - 0x14], bl
            //   740b                 | je                  0xd
            //   6a00                 | push                0
            //   53                   | push                ebx
            //   8d4dcc               | lea                 ecx, [ebp - 0x34]
            //   e8????????           |                     

        $sequence_9 = { 53 6aff ff7508 8945fc 53 53 895df4 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   6aff                 | push                -1
            //   ff7508               | push                dword ptr [ebp + 8]
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   895df4               | mov                 dword ptr [ebp - 0xc], ebx

    condition:
        7 of them and filesize < 761856
}