rule win_joanap_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.joanap"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 8d942433010000 52 56 ffd7 85c0 a3???????? }
            // n = 6, score = 100
            //   8d942433010000       | lea                 edx, [esp + 0x133]
            //   52                   | push                edx
            //   56                   | push                esi
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax
            //   a3????????           |                     

        $sequence_1 = { 83f8ff 0f8496000000 6683bc245810000000 0f8587000000 8bde 8b942454100000 c1e305 }
            // n = 7, score = 100
            //   83f8ff               | cmp                 eax, -1
            //   0f8496000000         | je                  0x9c
            //   6683bc245810000000     | cmp    word ptr [esp + 0x1058], 0
            //   0f8587000000         | jne                 0x8d
            //   8bde                 | mov                 ebx, esi
            //   8b942454100000       | mov                 edx, dword ptr [esp + 0x1054]
            //   c1e305               | shl                 ebx, 5

        $sequence_2 = { 5d 5b 81c44c200000 c3 8b7c2428 8d4c2420 51 }
            // n = 7, score = 100
            //   5d                   | pop                 ebp
            //   5b                   | pop                 ebx
            //   81c44c200000         | add                 esp, 0x204c
            //   c3                   | ret                 
            //   8b7c2428             | mov                 edi, dword ptr [esp + 0x28]
            //   8d4c2420             | lea                 ecx, [esp + 0x20]
            //   51                   | push                ecx

        $sequence_3 = { 6820bf0200 8d842488010000 8b5120 6a04 50 56 89942494010000 }
            // n = 7, score = 100
            //   6820bf0200           | push                0x2bf20
            //   8d842488010000       | lea                 eax, [esp + 0x188]
            //   8b5120               | mov                 edx, dword ptr [ecx + 0x20]
            //   6a04                 | push                4
            //   50                   | push                eax
            //   56                   | push                esi
            //   89942494010000       | mov                 dword ptr [esp + 0x194], edx

        $sequence_4 = { 6820bf0200 8d54245c 6a08 52 53 89442468 894c246c }
            // n = 7, score = 100
            //   6820bf0200           | push                0x2bf20
            //   8d54245c             | lea                 edx, [esp + 0x5c]
            //   6a08                 | push                8
            //   52                   | push                edx
            //   53                   | push                ebx
            //   89442468             | mov                 dword ptr [esp + 0x68], eax
            //   894c246c             | mov                 dword ptr [esp + 0x6c], ecx

        $sequence_5 = { 8d0440 83c408 c1e003 8b54242c 8d8898d72d00 89a898d72d00 897904 }
            // n = 7, score = 100
            //   8d0440               | lea                 eax, [eax + eax*2]
            //   83c408               | add                 esp, 8
            //   c1e003               | shl                 eax, 3
            //   8b54242c             | mov                 edx, dword ptr [esp + 0x2c]
            //   8d8898d72d00         | lea                 ecx, [eax + 0x2dd798]
            //   89a898d72d00         | mov                 dword ptr [eax + 0x2dd798], ebp
            //   897904               | mov                 dword ptr [ecx + 4], edi

        $sequence_6 = { 0f85d9020000 8b442418 85c0 0f86f4010000 6681fb0640 7570 }
            // n = 6, score = 100
            //   0f85d9020000         | jne                 0x2df
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]
            //   85c0                 | test                eax, eax
            //   0f86f4010000         | jbe                 0x1fa
            //   6681fb0640           | cmp                 bx, 0x4006
            //   7570                 | jne                 0x72

        $sequence_7 = { 83c404 eb58 8d4e03 51 e8???????? 83c404 eb4a }
            // n = 7, score = 100
            //   83c404               | add                 esp, 4
            //   eb58                 | jmp                 0x5a
            //   8d4e03               | lea                 ecx, [esi + 3]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   eb4a                 | jmp                 0x4c

        $sequence_8 = { ff15???????? 85c0 0f84cf000000 8b4c2420 51 6a01 68ff0f1f00 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f84cf000000         | je                  0xd5
            //   8b4c2420             | mov                 ecx, dword ptr [esp + 0x20]
            //   51                   | push                ecx
            //   6a01                 | push                1
            //   68ff0f1f00           | push                0x1f0fff

        $sequence_9 = { 0bc0 5b 81c470210000 c3 6a01 6820bf0200 8d8c2488010000 }
            // n = 7, score = 100
            //   0bc0                 | or                  eax, eax
            //   5b                   | pop                 ebx
            //   81c470210000         | add                 esp, 0x2170
            //   c3                   | ret                 
            //   6a01                 | push                1
            //   6820bf0200           | push                0x2bf20
            //   8d8c2488010000       | lea                 ecx, [esp + 0x188]

    condition:
        7 of them and filesize < 270336
}