rule win_andromut_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.andromut."
        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.andromut"
        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 = { 6a01 68???????? ffd0 85c0 74e1 68d0070000 }
            // n = 6, score = 200
            //   6a01                 | push                1
            //   68????????           |                     
            //   ffd0                 | call                eax
            //   85c0                 | test                eax, eax
            //   74e1                 | je                  0xffffffe3
            //   68d0070000           | push                0x7d0

        $sequence_1 = { ffd0 8b15???????? 8d45e4 8b0d???????? 50 53 53 }
            // n = 7, score = 200
            //   ffd0                 | call                eax
            //   8b15????????         |                     
            //   8d45e4               | lea                 eax, dword ptr [ebp - 0x1c]
            //   8b0d????????         |                     
            //   50                   | push                eax
            //   53                   | push                ebx
            //   53                   | push                ebx

        $sequence_2 = { 56 6800000040 51 ffd0 898584f0ffff 83f8ff }
            // n = 6, score = 200
            //   56                   | push                esi
            //   6800000040           | push                0x40000000
            //   51                   | push                ecx
            //   ffd0                 | call                eax
            //   898584f0ffff         | mov                 dword ptr [ebp - 0xf7c], eax
            //   83f8ff               | cmp                 eax, -1

        $sequence_3 = { 59 50 56 8d4dd4 e8???????? 837de810 }
            // n = 6, score = 200
            //   59                   | pop                 ecx
            //   50                   | push                eax
            //   56                   | push                esi
            //   8d4dd4               | lea                 ecx, dword ptr [ebp - 0x2c]
            //   e8????????           |                     
            //   837de810             | cmp                 dword ptr [ebp - 0x18], 0x10

        $sequence_4 = { 3db7000000 7513 8d4dc8 8d5102 668b01 83c102 }
            // n = 6, score = 200
            //   3db7000000           | cmp                 eax, 0xb7
            //   7513                 | jne                 0x15
            //   8d4dc8               | lea                 ecx, dword ptr [ebp - 0x38]
            //   8d5102               | lea                 edx, dword ptr [ecx + 2]
            //   668b01               | mov                 ax, word ptr [ecx]
            //   83c102               | add                 ecx, 2

        $sequence_5 = { e8???????? ffd0 8d85ecfbffff 8bce 53 50 e8???????? }
            // n = 7, score = 200
            //   e8????????           |                     
            //   ffd0                 | call                eax
            //   8d85ecfbffff         | lea                 eax, dword ptr [ebp - 0x414]
            //   8bce                 | mov                 ecx, esi
            //   53                   | push                ebx
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_6 = { 83c410 85c0 7512 ffb590f9ffff b944acc281 e8???????? ffd0 }
            // n = 7, score = 200
            //   83c410               | add                 esp, 0x10
            //   85c0                 | test                eax, eax
            //   7512                 | jne                 0x14
            //   ffb590f9ffff         | push                dword ptr [ebp - 0x670]
            //   b944acc281           | mov                 ecx, 0x81c2ac44
            //   e8????????           |                     
            //   ffd0                 | call                eax

        $sequence_7 = { 8bfa c745e0ab03a543 c745e4a183a543 33f6 c745e8a183a443 c745ecafc3b003 c745f0b303a583 }
            // n = 7, score = 200
            //   8bfa                 | mov                 edi, edx
            //   c745e0ab03a543       | mov                 dword ptr [ebp - 0x20], 0x43a503ab
            //   c745e4a183a543       | mov                 dword ptr [ebp - 0x1c], 0x43a583a1
            //   33f6                 | xor                 esi, esi
            //   c745e8a183a443       | mov                 dword ptr [ebp - 0x18], 0x43a483a1
            //   c745ecafc3b003       | mov                 dword ptr [ebp - 0x14], 0x3b0c3af
            //   c745f0b303a583       | mov                 dword ptr [ebp - 0x10], 0x83a503b3

        $sequence_8 = { 0f4345e4 50 ff15???????? 56 6a01 8d4de4 e8???????? }
            // n = 7, score = 200
            //   0f4345e4             | cmovae              eax, dword ptr [ebp - 0x1c]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   56                   | push                esi
            //   6a01                 | push                1
            //   8d4de4               | lea                 ecx, dword ptr [ebp - 0x1c]
            //   e8????????           |                     

        $sequence_9 = { 8d8570f9ffff b9c6968752 50 e8???????? ffd0 6a04 8d85d8fbffff }
            // n = 7, score = 200
            //   8d8570f9ffff         | lea                 eax, dword ptr [ebp - 0x690]
            //   b9c6968752           | mov                 ecx, 0x528796c6
            //   50                   | push                eax
            //   e8????????           |                     
            //   ffd0                 | call                eax
            //   6a04                 | push                4
            //   8d85d8fbffff         | lea                 eax, dword ptr [ebp - 0x428]

    condition:
        7 of them and filesize < 368640
}