rule win_phobos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        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 = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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???????? 8345fc10 83c40c 83eb10 4f 75b9 eb61 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8345fc10             | add                 dword ptr [ebp - 4], 0x10
            //   83c40c               | add                 esp, 0xc
            //   83eb10               | sub                 ebx, 0x10
            //   4f                   | dec                 edi
            //   75b9                 | jne                 0xffffffbb
            //   eb61                 | jmp                 0x63

        $sequence_1 = { 5b 8b4508 8bce e8???????? 5f c9 }
            // n = 6, score = 100
            //   5b                   | pop                 ebx
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   5f                   | pop                 edi
            //   c9                   | leave               

        $sequence_2 = { 83c41c 6a09 8945f0 e8???????? 8945ec }
            // n = 5, score = 100
            //   83c41c               | add                 esp, 0x1c
            //   6a09                 | push                9
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   e8????????           |                     
            //   8945ec               | mov                 dword ptr [ebp - 0x14], eax

        $sequence_3 = { 03c3 8d440004 50 57 e8???????? 83c40c eb12 }
            // n = 7, score = 100
            //   03c3                 | add                 eax, ebx
            //   8d440004             | lea                 eax, [eax + eax + 4]
            //   50                   | push                eax
            //   57                   | push                edi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   eb12                 | jmp                 0x14

        $sequence_4 = { 83c602 6685c0 75e5 33c0 668902 83c202 33c0 }
            // n = 7, score = 100
            //   83c602               | add                 esi, 2
            //   6685c0               | test                ax, ax
            //   75e5                 | jne                 0xffffffe7
            //   33c0                 | xor                 eax, eax
            //   668902               | mov                 word ptr [edx], ax
            //   83c202               | add                 edx, 2
            //   33c0                 | xor                 eax, eax

        $sequence_5 = { 57 6a16 8944243c e8???????? 57 6a23 89442428 }
            // n = 7, score = 100
            //   57                   | push                edi
            //   6a16                 | push                0x16
            //   8944243c             | mov                 dword ptr [esp + 0x3c], eax
            //   e8????????           |                     
            //   57                   | push                edi
            //   6a23                 | push                0x23
            //   89442428             | mov                 dword ptr [esp + 0x28], eax

        $sequence_6 = { e8???????? 59 50 ff7508 ff74241c ff15???????? 6aff }
            // n = 7, score = 100
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   50                   | push                eax
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff74241c             | push                dword ptr [esp + 0x1c]
            //   ff15????????         |                     
            //   6aff                 | push                -1

        $sequence_7 = { 8d45fc 50 ff75fc 53 6a02 ff75e4 ffd7 }
            // n = 7, score = 100
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   53                   | push                ebx
            //   6a02                 | push                2
            //   ff75e4               | push                dword ptr [ebp - 0x1c]
            //   ffd7                 | call                edi

        $sequence_8 = { 8bc7 5f 5d c3 55 8bec 68a4000000 }
            // n = 7, score = 100
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   68a4000000           | push                0xa4

        $sequence_9 = { 83c410 8945ec 3975fc 0f8434010000 8b45d4 3bc6 740a }
            // n = 7, score = 100
            //   83c410               | add                 esp, 0x10
            //   8945ec               | mov                 dword ptr [ebp - 0x14], eax
            //   3975fc               | cmp                 dword ptr [ebp - 4], esi
            //   0f8434010000         | je                  0x13a
            //   8b45d4               | mov                 eax, dword ptr [ebp - 0x2c]
            //   3bc6                 | cmp                 eax, esi
            //   740a                 | je                  0xc

    condition:
        7 of them and filesize < 139264
}