rule win_andromut_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 53 56 56 53 56 6800000040 8d8da8f9ffff }
            // n = 7, score = 200
            //   53                   | push                ebx
            //   56                   | push                esi
            //   56                   | push                esi
            //   53                   | push                ebx
            //   56                   | push                esi
            //   6800000040           | push                0x40000000
            //   8d8da8f9ffff         | lea                 ecx, [ebp - 0x658]

        $sequence_1 = { 8365ec00 8365fc00 33c0 8b7508 33db }
            // n = 5, score = 200
            //   8365ec00             | and                 dword ptr [ebp - 0x14], 0
            //   8365fc00             | and                 dword ptr [ebp - 4], 0
            //   33c0                 | xor                 eax, eax
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   33db                 | xor                 ebx, ebx

        $sequence_2 = { 6a01 e8???????? c3 6a50 b8???????? e8???????? 8bf2 }
            // n = 7, score = 200
            //   6a01                 | push                1
            //   e8????????           |                     
            //   c3                   | ret                 
            //   6a50                 | push                0x50
            //   b8????????           |                     
            //   e8????????           |                     
            //   8bf2                 | mov                 esi, edx

        $sequence_3 = { 3bf7 7ce4 5f 5e 8be5 5d c3 }
            // n = 7, score = 200
            //   3bf7                 | cmp                 esi, edi
            //   7ce4                 | jl                  0xffffffe6
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c3                   | ret                 

        $sequence_4 = { 83c102 663bc3 75f5 2bca 8b958cf9ffff d1f9 8d0409 }
            // n = 7, score = 200
            //   83c102               | add                 ecx, 2
            //   663bc3               | cmp                 ax, bx
            //   75f5                 | jne                 0xfffffff7
            //   2bca                 | sub                 ecx, edx
            //   8b958cf9ffff         | mov                 edx, dword ptr [ebp - 0x674]
            //   d1f9                 | sar                 ecx, 1
            //   8d0409               | lea                 eax, [ecx + ecx]

        $sequence_5 = { 50 8d85b8ebffff 50 8d8d40e3ffff e8???????? 83bd54e3ffff10 8db540e3ffff }
            // n = 7, score = 200
            //   50                   | push                eax
            //   8d85b8ebffff         | lea                 eax, [ebp - 0x1448]
            //   50                   | push                eax
            //   8d8d40e3ffff         | lea                 ecx, [ebp - 0x1cc0]
            //   e8????????           |                     
            //   83bd54e3ffff10       | cmp                 dword ptr [ebp - 0x1cac], 0x10
            //   8db540e3ffff         | lea                 esi, [ebp - 0x1cc0]

        $sequence_6 = { e8???????? 8b15???????? 8d8574ffffff 8b0d???????? 83c40c }
            // n = 5, score = 200
            //   e8????????           |                     
            //   8b15????????         |                     
            //   8d8574ffffff         | lea                 eax, [ebp - 0x8c]
            //   8b0d????????         |                     
            //   83c40c               | add                 esp, 0xc

        $sequence_7 = { 8d4c243c e8???????? c70424d0070000 ffd6 e8???????? 53 57 }
            // n = 7, score = 200
            //   8d4c243c             | lea                 ecx, [esp + 0x3c]
            //   e8????????           |                     
            //   c70424d0070000       | mov                 dword ptr [esp], 0x7d0
            //   ffd6                 | call                esi
            //   e8????????           |                     
            //   53                   | push                ebx
            //   57                   | push                edi

        $sequence_8 = { 85c0 0f8459040000 8d8dc8feffff 8d5102 }
            // n = 4, score = 200
            //   85c0                 | test                eax, eax
            //   0f8459040000         | je                  0x45f
            //   8d8dc8feffff         | lea                 ecx, [ebp - 0x138]
            //   8d5102               | lea                 edx, [ecx + 2]

        $sequence_9 = { 8d8d00f8ffff 51 ffd0 b974723dc5 e8???????? }
            // n = 5, score = 200
            //   8d8d00f8ffff         | lea                 ecx, [ebp - 0x800]
            //   51                   | push                ecx
            //   ffd0                 | call                eax
            //   b974723dc5           | mov                 ecx, 0xc53d7274
            //   e8????????           |                     

    condition:
        7 of them and filesize < 368640
}