[TLP:WHITE] win_phobos_auto (20230125 | Detects win.phobos.)
rule win_phobos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.phobos."
        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.phobos"
        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 = { 81c6b2000000 89b7a8000000 8b75fc 6a02 8945e0 8945e4 8d45e0 }
            // n = 7, score = 100
            //   81c6b2000000         | add                 esi, 0xb2
            //   89b7a8000000         | mov                 dword ptr [edi + 0xa8], esi
            //   8b75fc               | mov                 esi, dword ptr [ebp - 4]
            //   6a02                 | push                2
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   8d45e0               | lea                 eax, [ebp - 0x20]

        $sequence_1 = { 8d440002 8945f8 8d45f4 50 6819010200 }
            // n = 5, score = 100
            //   8d440002             | lea                 eax, [eax + eax + 2]
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   50                   | push                eax
            //   6819010200           | push                0x20119

        $sequence_2 = { ff7510 ff15???????? 8945fc 83f8ff 0f849c010000 ff75ec 8d4620 }
            // n = 7, score = 100
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff15????????         |                     
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   83f8ff               | cmp                 eax, -1
            //   0f849c010000         | je                  0x1a2
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   8d4620               | lea                 eax, [esi + 0x20]

        $sequence_3 = { ff7508 e8???????? 83c40c 8bd8 66ff4b04 66ff4e04 }
            // n = 6, score = 100
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8bd8                 | mov                 ebx, eax
            //   66ff4b04             | dec                 word ptr [ebx + 4]
            //   66ff4e04             | dec                 word ptr [esi + 4]

        $sequence_4 = { e8???????? 59 59 ff45f4 837dd800 743e 837dec00 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   ff45f4               | inc                 dword ptr [ebp - 0xc]
            //   837dd800             | cmp                 dword ptr [ebp - 0x28], 0
            //   743e                 | je                  0x40
            //   837dec00             | cmp                 dword ptr [ebp - 0x14], 0

        $sequence_5 = { 5b c6043080 3bc3 40 730e }
            // n = 5, score = 100
            //   5b                   | pop                 ebx
            //   c6043080             | mov                 byte ptr [eax + esi], 0x80
            //   3bc3                 | cmp                 eax, ebx
            //   40                   | inc                 eax
            //   730e                 | jae                 0x10

        $sequence_6 = { 8b4508 ebeb 8b7df8 eb1b 0fb707 }
            // n = 5, score = 100
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   ebeb                 | jmp                 0xffffffed
            //   8b7df8               | mov                 edi, dword ptr [ebp - 8]
            //   eb1b                 | jmp                 0x1d
            //   0fb707               | movzx               eax, word ptr [edi]

        $sequence_7 = { eb01 4f ff75fc e8???????? 59 }
            // n = 5, score = 100
            //   eb01                 | jmp                 3
            //   4f                   | dec                 edi
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_8 = { 57 50 e8???????? 8b4604 ff760c }
            // n = 5, score = 100
            //   57                   | push                edi
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b4604               | mov                 eax, dword ptr [esi + 4]
            //   ff760c               | push                dword ptr [esi + 0xc]

        $sequence_9 = { 837e0800 7446 8b06 85c0 7440 8b0f 894e04 }
            // n = 7, score = 100
            //   837e0800             | cmp                 dword ptr [esi + 8], 0
            //   7446                 | je                  0x48
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   85c0                 | test                eax, eax
            //   7440                 | je                  0x42
            //   8b0f                 | mov                 ecx, dword ptr [edi]
            //   894e04               | mov                 dword ptr [esi + 4], ecx

    condition:
        7 of them and filesize < 139264
}