rule win_petrwrap_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.petrwrap."
        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.petrwrap"
        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 = { 33f9 8b4c2424 23c3 33d0 03cf 13ea 034c2438 }
            // n = 7, score = 100
            //   33f9                 | xor                 edi, ecx
            //   8b4c2424             | mov                 ecx, dword ptr [esp + 0x24]
            //   23c3                 | and                 eax, ebx
            //   33d0                 | xor                 edx, eax
            //   03cf                 | add                 ecx, edi
            //   13ea                 | adc                 ebp, edx
            //   034c2438             | add                 ecx, dword ptr [esp + 0x38]

        $sequence_1 = { c1e81f 40 03c2 687f010000 68???????? 8d0480 03c0 }
            // n = 7, score = 100
            //   c1e81f               | shr                 eax, 0x1f
            //   40                   | inc                 eax
            //   03c2                 | add                 eax, edx
            //   687f010000           | push                0x17f
            //   68????????           |                     
            //   8d0480               | lea                 eax, [eax + eax*4]
            //   03c0                 | add                 eax, eax

        $sequence_2 = { 660fd68520040000 660fd68528040000 c7852004000010000000 8b1d???????? 85ff 7405 ffd3 }
            // n = 7, score = 100
            //   660fd68520040000     | movq                qword ptr [ebp + 0x420], xmm0
            //   660fd68528040000     | movq                qword ptr [ebp + 0x428], xmm0
            //   c7852004000010000000     | mov    dword ptr [ebp + 0x420], 0x10
            //   8b1d????????         |                     
            //   85ff                 | test                edi, edi
            //   7405                 | je                  7
            //   ffd3                 | call                ebx

        $sequence_3 = { 83c408 85c0 8b442444 7820 55 }
            // n = 5, score = 100
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax
            //   8b442444             | mov                 eax, dword ptr [esp + 0x44]
            //   7820                 | js                  0x22
            //   55                   | push                ebp

        $sequence_4 = { 8d462c 50 e8???????? 83c40c c7464000000000 c7464401000000 }
            // n = 6, score = 100
            //   8d462c               | lea                 eax, [esi + 0x2c]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   c7464000000000       | mov                 dword ptr [esi + 0x40], 0
            //   c7464401000000       | mov                 dword ptr [esi + 0x44], 1

        $sequence_5 = { 56 56 e8???????? 83c40c 8bfe f30f7e07 }
            // n = 6, score = 100
            //   56                   | push                esi
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8bfe                 | mov                 edi, esi
            //   f30f7e07             | movq                xmm0, qword ptr [edi]

        $sequence_6 = { 8d8784000000 50 ff742418 8b8190000000 57 ffd0 }
            // n = 6, score = 100
            //   8d8784000000         | lea                 eax, [edi + 0x84]
            //   50                   | push                eax
            //   ff742418             | push                dword ptr [esp + 0x18]
            //   8b8190000000         | mov                 eax, dword ptr [ecx + 0x90]
            //   57                   | push                edi
            //   ffd0                 | call                eax

        $sequence_7 = { 8b4c2468 33cc e8???????? 83c46c c3 7e27 3bf7 }
            // n = 7, score = 100
            //   8b4c2468             | mov                 ecx, dword ptr [esp + 0x68]
            //   33cc                 | xor                 ecx, esp
            //   e8????????           |                     
            //   83c46c               | add                 esp, 0x6c
            //   c3                   | ret                 
            //   7e27                 | jle                 0x29
            //   3bf7                 | cmp                 esi, edi

        $sequence_8 = { 894c2424 eb0b 8bbc24c0000000 8b6c2418 83bc24c400000000 750d 85ed }
            // n = 7, score = 100
            //   894c2424             | mov                 dword ptr [esp + 0x24], ecx
            //   eb0b                 | jmp                 0xd
            //   8bbc24c0000000       | mov                 edi, dword ptr [esp + 0xc0]
            //   8b6c2418             | mov                 ebp, dword ptr [esp + 0x18]
            //   83bc24c400000000     | cmp                 dword ptr [esp + 0xc4], 0
            //   750d                 | jne                 0xf
            //   85ed                 | test                ebp, ebp

        $sequence_9 = { 897c2464 8bfb 0facdd06 c1ef1d 0bf8 8b44245c 33c7 }
            // n = 7, score = 100
            //   897c2464             | mov                 dword ptr [esp + 0x64], edi
            //   8bfb                 | mov                 edi, ebx
            //   0facdd06             | shrd                ebp, ebx, 6
            //   c1ef1d               | shr                 edi, 0x1d
            //   0bf8                 | or                  edi, eax
            //   8b44245c             | mov                 eax, dword ptr [esp + 0x5c]
            //   33c7                 | xor                 eax, edi

    condition:
        7 of them and filesize < 1024000
}