rule win_targetcompany_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.targetcompany."
        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.targetcompany"
        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 = { 0bc1 0bd6 b106 e8???????? 5e 894748 89574c }
            // n = 7, score = 500
            //   0bc1                 | or                  eax, ecx
            //   0bd6                 | or                  edx, esi
            //   b106                 | mov                 cl, 6
            //   e8????????           |                     
            //   5e                   | pop                 esi
            //   894748               | mov                 dword ptr [edi + 0x48], eax
            //   89574c               | mov                 dword ptr [edi + 0x4c], edx

        $sequence_1 = { 014de0 894df0 8b4de0 33ca 8b55f4 3355c4 c1c107 }
            // n = 7, score = 500
            //   014de0               | add                 dword ptr [ebp - 0x20], ecx
            //   894df0               | mov                 dword ptr [ebp - 0x10], ecx
            //   8b4de0               | mov                 ecx, dword ptr [ebp - 0x20]
            //   33ca                 | xor                 ecx, edx
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   3355c4               | xor                 edx, dword ptr [ebp - 0x3c]
            //   c1c107               | rol                 ecx, 7

        $sequence_2 = { 85c0 7404 3b06 7405 e8???????? 3b5e04 }
            // n = 6, score = 500
            //   85c0                 | test                eax, eax
            //   7404                 | je                  6
            //   3b06                 | cmp                 eax, dword ptr [esi]
            //   7405                 | je                  7
            //   e8????????           |                     
            //   3b5e04               | cmp                 ebx, dword ptr [esi + 4]

        $sequence_3 = { 8b4508 53 56 57 8d9dc4dcffff 8985dcdcffff }
            // n = 6, score = 500
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   8d9dc4dcffff         | lea                 ebx, [ebp - 0x233c]
            //   8985dcdcffff         | mov                 dword ptr [ebp - 0x2324], eax

        $sequence_4 = { 014608 8b4658 11560c 014608 8b465c 8b4e54 11460c }
            // n = 7, score = 500
            //   014608               | add                 dword ptr [esi + 8], eax
            //   8b4658               | mov                 eax, dword ptr [esi + 0x58]
            //   11560c               | adc                 dword ptr [esi + 0xc], edx
            //   014608               | add                 dword ptr [esi + 8], eax
            //   8b465c               | mov                 eax, dword ptr [esi + 0x5c]
            //   8b4e54               | mov                 ecx, dword ptr [esi + 0x54]
            //   11460c               | adc                 dword ptr [esi + 0xc], eax

        $sequence_5 = { 99 8945f8 0fb64608 8bca 99 8b55f8 }
            // n = 6, score = 500
            //   99                   | cdq                 
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   0fb64608             | movzx               eax, byte ptr [esi + 8]
            //   8bca                 | mov                 ecx, edx
            //   99                   | cdq                 
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]

        $sequence_6 = { 7705 395808 7635 8db5e4dcffff e8???????? 8bf8 e8???????? }
            // n = 7, score = 500
            //   7705                 | ja                  7
            //   395808               | cmp                 dword ptr [eax + 8], ebx
            //   7635                 | jbe                 0x37
            //   8db5e4dcffff         | lea                 esi, [ebp - 0x231c]
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   e8????????           |                     

        $sequence_7 = { 8bf8 85c0 74c7 83e900 740e 49 7553 }
            // n = 7, score = 500
            //   8bf8                 | mov                 edi, eax
            //   85c0                 | test                eax, eax
            //   74c7                 | je                  0xffffffc9
            //   83e900               | sub                 ecx, 0
            //   740e                 | je                  0x10
            //   49                   | dec                 ecx
            //   7553                 | jne                 0x55

        $sequence_8 = { 8d4de8 ffb5c4feffff ffb5c4feffff e8???????? 83c410 53 53 }
            // n = 7, score = 500
            //   8d4de8               | lea                 ecx, [ebp - 0x18]
            //   ffb5c4feffff         | push                dword ptr [ebp - 0x13c]
            //   ffb5c4feffff         | push                dword ptr [ebp - 0x13c]
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   53                   | push                ebx
            //   53                   | push                ebx

        $sequence_9 = { 895f14 3bc3 7454 e8???????? 3ac3 744b }
            // n = 6, score = 500
            //   895f14               | mov                 dword ptr [edi + 0x14], ebx
            //   3bc3                 | cmp                 eax, ebx
            //   7454                 | je                  0x56
            //   e8????????           |                     
            //   3ac3                 | cmp                 al, bl
            //   744b                 | je                  0x4d

    condition:
        7 of them and filesize < 328704
}