rule win_petrwrap_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 8b4504 8954241c 3bc8 0f8de0000000 85c0 0f84d8000000 56 }
            // n = 7, score = 100
            //   8b4504               | mov                 eax, dword ptr [ebp + 4]
            //   8954241c             | mov                 dword ptr [esp + 0x1c], edx
            //   3bc8                 | cmp                 ecx, eax
            //   0f8de0000000         | jge                 0xe6
            //   85c0                 | test                eax, eax
            //   0f84d8000000         | je                  0xde
            //   56                   | push                esi

        $sequence_1 = { 0f85d9faffff ff4b04 394304 7feb b801000000 eb10 57 }
            // n = 7, score = 100
            //   0f85d9faffff         | jne                 0xfffffadf
            //   ff4b04               | dec                 dword ptr [ebx + 4]
            //   394304               | cmp                 dword ptr [ebx + 4], eax
            //   7feb                 | jg                  0xffffffed
            //   b801000000           | mov                 eax, 1
            //   eb10                 | jmp                 0x12
            //   57                   | push                edi

        $sequence_2 = { 48 89442430 85c0 0f8ef6000000 2bcb 894c2418 8b0b }
            // n = 7, score = 100
            //   48                   | dec                 eax
            //   89442430             | mov                 dword ptr [esp + 0x30], eax
            //   85c0                 | test                eax, eax
            //   0f8ef6000000         | jle                 0xfc
            //   2bcb                 | sub                 ecx, ebx
            //   894c2418             | mov                 dword ptr [esp + 0x18], ecx
            //   8b0b                 | mov                 ecx, dword ptr [ebx]

        $sequence_3 = { be34000000 90 b808000000 e8???????? f20f110424 6a14 68???????? }
            // n = 7, score = 100
            //   be34000000           | mov                 esi, 0x34
            //   90                   | nop                 
            //   b808000000           | mov                 eax, 8
            //   e8????????           |                     
            //   f20f110424           | movsd               qword ptr [esp], xmm0
            //   6a14                 | push                0x14
            //   68????????           |                     

        $sequence_4 = { 33ed 8d9b00000000 8d7c2441 03fd 03f7 8a27 0fb60c16 }
            // n = 7, score = 100
            //   33ed                 | xor                 ebp, ebp
            //   8d9b00000000         | lea                 ebx, [ebx]
            //   8d7c2441             | lea                 edi, [esp + 0x41]
            //   03fd                 | add                 edi, ebp
            //   03f7                 | add                 esi, edi
            //   8a27                 | mov                 ah, byte ptr [edi]
            //   0fb60c16             | movzx               ecx, byte ptr [esi + edx]

        $sequence_5 = { c1e206 03148580db4600 eb05 ba???????? f6422480 7415 e8???????? }
            // n = 7, score = 100
            //   c1e206               | shl                 edx, 6
            //   03148580db4600       | add                 edx, dword ptr [eax*4 + 0x46db80]
            //   eb05                 | jmp                 7
            //   ba????????           |                     
            //   f6422480             | test                byte ptr [edx + 0x24], 0x80
            //   7415                 | je                  0x17
            //   e8????????           |                     

        $sequence_6 = { 50 e8???????? 83c42c 85c0 7525 6891020000 68???????? }
            // n = 7, score = 100
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c42c               | add                 esp, 0x2c
            //   85c0                 | test                eax, eax
            //   7525                 | jne                 0x27
            //   6891020000           | push                0x291
            //   68????????           |                     

        $sequence_7 = { 6a40 8d8530040000 50 e8???????? 83c410 bf01000000 897db0 }
            // n = 7, score = 100
            //   6a40                 | push                0x40
            //   8d8530040000         | lea                 eax, [ebp + 0x430]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   bf01000000           | mov                 edi, 1
            //   897db0               | mov                 dword ptr [ebp - 0x50], edi

        $sequence_8 = { e8???????? 53 e8???????? 8bd8 83c408 895c241c }
            // n = 6, score = 100
            //   e8????????           |                     
            //   53                   | push                ebx
            //   e8????????           |                     
            //   8bd8                 | mov                 ebx, eax
            //   83c408               | add                 esp, 8
            //   895c241c             | mov                 dword ptr [esp + 0x1c], ebx

        $sequence_9 = { 8b7c2440 8b4c2440 234c2448 f7d7 237c2424 f7d2 23542458 }
            // n = 7, score = 100
            //   8b7c2440             | mov                 edi, dword ptr [esp + 0x40]
            //   8b4c2440             | mov                 ecx, dword ptr [esp + 0x40]
            //   234c2448             | and                 ecx, dword ptr [esp + 0x48]
            //   f7d7                 | not                 edi
            //   237c2424             | and                 edi, dword ptr [esp + 0x24]
            //   f7d2                 | not                 edx
            //   23542458             | and                 edx, dword ptr [esp + 0x58]

    condition:
        7 of them and filesize < 1024000
}