rule win_htran_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.htran."
        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.htran"
        malpedia_rule_date = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { eb05 68???????? e8???????? 83c404 8b5c2414 8b442418 8b35???????? }
            // n = 7, score = 200
            //   eb05                 | jmp                 7
            //   68????????           |                     
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8b5c2414             | mov                 ebx, dword ptr [esp + 0x14]
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]
            //   8b35????????         |                     

        $sequence_1 = { 51 ff15???????? 25ffff0000 89442420 8b4c2414 8d542450 8d442470 }
            // n = 7, score = 200
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   25ffff0000           | and                 eax, 0xffff
            //   89442420             | mov                 dword ptr [esp + 0x20], eax
            //   8b4c2414             | mov                 ecx, dword ptr [esp + 0x14]
            //   8d542450             | lea                 edx, dword ptr [esp + 0x50]
            //   8d442470             | lea                 eax, dword ptr [esp + 0x70]

        $sequence_2 = { 8d3449 8d34b5f09b4000 83c00c 3bc6 7305 }
            // n = 5, score = 200
            //   8d3449               | lea                 esi, dword ptr [ecx + ecx*2]
            //   8d34b5f09b4000       | lea                 esi, dword ptr [esi*4 + 0x409bf0]
            //   83c00c               | add                 eax, 0xc
            //   3bc6                 | cmp                 eax, esi
            //   7305                 | jae                 7

        $sequence_3 = { 89442420 ff15???????? 8d442408 6a10 50 56 }
            // n = 6, score = 200
            //   89442420             | mov                 dword ptr [esp + 0x20], eax
            //   ff15????????         |                     
            //   8d442408             | lea                 eax, dword ptr [esp + 8]
            //   6a10                 | push                0x10
            //   50                   | push                eax
            //   56                   | push                esi

        $sequence_4 = { 0f84c1030000 8d8c24e8010000 51 56 e8???????? }
            // n = 5, score = 200
            //   0f84c1030000         | je                  0x3c7
            //   8d8c24e8010000       | lea                 ecx, dword ptr [esp + 0x1e8]
            //   51                   | push                ecx
            //   56                   | push                esi
            //   e8????????           |                     

        $sequence_5 = { 72f4 3bc2 7512 899c24f0010000 c78424e801000002000000 8d442458 8d8c24e4000000 }
            // n = 7, score = 200
            //   72f4                 | jb                  0xfffffff6
            //   3bc2                 | cmp                 eax, edx
            //   7512                 | jne                 0x14
            //   899c24f0010000       | mov                 dword ptr [esp + 0x1f0], ebx
            //   c78424e801000002000000     | mov    dword ptr [esp + 0x1e8], 2
            //   8d442458             | lea                 eax, dword ptr [esp + 0x58]
            //   8d8c24e4000000       | lea                 ecx, dword ptr [esp + 0xe4]

        $sequence_6 = { 85c0 0f84b2010000 7d0c 393d???????? 0f856f020000 8b4c241c }
            // n = 6, score = 200
            //   85c0                 | test                eax, eax
            //   0f84b2010000         | je                  0x1b8
            //   7d0c                 | jge                 0xe
            //   393d????????         |                     
            //   0f856f020000         | jne                 0x275
            //   8b4c241c             | mov                 ecx, dword ptr [esp + 0x1c]

        $sequence_7 = { 5d 5b 83c43c c3 68???????? e8???????? }
            // n = 6, score = 200
            //   5d                   | pop                 ebp
            //   5b                   | pop                 ebx
            //   83c43c               | add                 esp, 0x3c
            //   c3                   | ret                 
            //   68????????           |                     
            //   e8????????           |                     

        $sequence_8 = { 8bf0 85f6 8974241c 0f8478010000 e8???????? }
            // n = 5, score = 200
            //   8bf0                 | mov                 esi, eax
            //   85f6                 | test                esi, esi
            //   8974241c             | mov                 dword ptr [esp + 0x1c], esi
            //   0f8478010000         | je                  0x17e
            //   e8????????           |                     

        $sequence_9 = { ff15???????? ebb6 6a00 8d8c2424010000 6800500000 }
            // n = 5, score = 200
            //   ff15????????         |                     
            //   ebb6                 | jmp                 0xffffffb8
            //   6a00                 | push                0
            //   8d8c2424010000       | lea                 ecx, dword ptr [esp + 0x124]
            //   6800500000           | push                0x5000

    condition:
        7 of them and filesize < 114688
}