rule win_phobos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        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 = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { 75e8 215f20 215f04 5b 5e c3 56 }
            // n = 7, score = 100
            //   75e8                 | jne                 0xffffffea
            //   215f20               | and                 dword ptr [edi + 0x20], ebx
            //   215f04               | and                 dword ptr [edi + 4], ebx
            //   5b                   | pop                 ebx
            //   5e                   | pop                 esi
            //   c3                   | ret                 
            //   56                   | push                esi

        $sequence_1 = { c3 55 8bec 83ec18 8365e800 53 }
            // n = 6, score = 100
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   83ec18               | sub                 esp, 0x18
            //   8365e800             | and                 dword ptr [ebp - 0x18], 0
            //   53                   | push                ebx

        $sequence_2 = { 8b7d08 8d4510 eb03 8b450c 83c004 8b08 89450c }
            // n = 7, score = 100
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]
            //   8d4510               | lea                 eax, [ebp + 0x10]
            //   eb03                 | jmp                 5
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   83c004               | add                 eax, 4
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   89450c               | mov                 dword ptr [ebp + 0xc], eax

        $sequence_3 = { 8d1c06 58 68bd010000 895dec 668945c8 ff15???????? 668945ca }
            // n = 7, score = 100
            //   8d1c06               | lea                 ebx, [esi + eax]
            //   58                   | pop                 eax
            //   68bd010000           | push                0x1bd
            //   895dec               | mov                 dword ptr [ebp - 0x14], ebx
            //   668945c8             | mov                 word ptr [ebp - 0x38], ax
            //   ff15????????         |                     
            //   668945ca             | mov                 word ptr [ebp - 0x36], ax

        $sequence_4 = { 0f8581000000 40 8bcb d3e0 85442414 7463 }
            // n = 6, score = 100
            //   0f8581000000         | jne                 0x87
            //   40                   | inc                 eax
            //   8bcb                 | mov                 ecx, ebx
            //   d3e0                 | shl                 eax, cl
            //   85442414             | test                dword ptr [esp + 0x14], eax
            //   7463                 | je                  0x65

        $sequence_5 = { 8b7df8 c1ef10 23f8 8b3cbdd0b94000 23d8 333c9dd0bd4000 8b5dec }
            // n = 7, score = 100
            //   8b7df8               | mov                 edi, dword ptr [ebp - 8]
            //   c1ef10               | shr                 edi, 0x10
            //   23f8                 | and                 edi, eax
            //   8b3cbdd0b94000       | mov                 edi, dword ptr [edi*4 + 0x40b9d0]
            //   23d8                 | and                 ebx, eax
            //   333c9dd0bd4000       | xor                 edi, dword ptr [ebx*4 + 0x40bdd0]
            //   8b5dec               | mov                 ebx, dword ptr [ebp - 0x14]

        $sequence_6 = { 83e957 3b4d0c 7319 834d1008 3945fc 7228 7504 }
            // n = 7, score = 100
            //   83e957               | sub                 ecx, 0x57
            //   3b4d0c               | cmp                 ecx, dword ptr [ebp + 0xc]
            //   7319                 | jae                 0x1b
            //   834d1008             | or                  dword ptr [ebp + 0x10], 8
            //   3945fc               | cmp                 dword ptr [ebp - 4], eax
            //   7228                 | jb                  0x2a
            //   7504                 | jne                 6

        $sequence_7 = { 7522 8b7514 ff7608 ff7604 ff750c ff36 6a01 }
            // n = 7, score = 100
            //   7522                 | jne                 0x24
            //   8b7514               | mov                 esi, dword ptr [ebp + 0x14]
            //   ff7608               | push                dword ptr [esi + 8]
            //   ff7604               | push                dword ptr [esi + 4]
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff36                 | push                dword ptr [esi]
            //   6a01                 | push                1

        $sequence_8 = { 50 57 57 ff7508 897dec 897df0 8b3d???????? }
            // n = 7, score = 100
            //   50                   | push                eax
            //   57                   | push                edi
            //   57                   | push                edi
            //   ff7508               | push                dword ptr [ebp + 8]
            //   897dec               | mov                 dword ptr [ebp - 0x14], edi
            //   897df0               | mov                 dword ptr [ebp - 0x10], edi
            //   8b3d????????         |                     

        $sequence_9 = { 5b 89486c c9 c3 8b4640 53 57 }
            // n = 7, score = 100
            //   5b                   | pop                 ebx
            //   89486c               | mov                 dword ptr [eax + 0x6c], ecx
            //   c9                   | leave               
            //   c3                   | ret                 
            //   8b4640               | mov                 eax, dword ptr [esi + 0x40]
            //   53                   | push                ebx
            //   57                   | push                edi

    condition:
        7 of them and filesize < 139264
}