rule win_icedid_downloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.icedid_downloader."
        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.icedid_downloader"
        malpedia_rule_date = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { 6a04 8b08 a5 50 a5 a5 a5 }
            // n = 7, score = 400
            //   6a04                 | push                4
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   a5                   | movsd               dword ptr es:[edi], dword ptr [esi]
            //   50                   | push                eax
            //   a5                   | movsd               dword ptr es:[edi], dword ptr [esi]
            //   a5                   | movsd               dword ptr es:[edi], dword ptr [esi]
            //   a5                   | movsd               dword ptr es:[edi], dword ptr [esi]

        $sequence_1 = { ffd3 8b4c2418 8bf8 8d442414 50 }
            // n = 5, score = 400
            //   ffd3                 | call                ebx
            //   8b4c2418             | mov                 ecx, dword ptr [esp + 0x18]
            //   8bf8                 | mov                 edi, eax
            //   8d442414             | lea                 eax, [esp + 0x14]
            //   50                   | push                eax

        $sequence_2 = { e8???????? 83c40c 8975d4 8d45d4 50 ff15???????? }
            // n = 6, score = 400
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8975d4               | mov                 dword ptr [ebp - 0x2c], esi
            //   8d45d4               | lea                 eax, [ebp - 0x2c]
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_3 = { 55 55 55 83c8ff 50 55 }
            // n = 6, score = 400
            //   55                   | push                ebp
            //   55                   | push                ebp
            //   55                   | push                ebp
            //   83c8ff               | or                  eax, 0xffffffff
            //   50                   | push                eax
            //   55                   | push                ebp

        $sequence_4 = { eb02 47 4e 803f00 75f9 53 }
            // n = 6, score = 400
            //   eb02                 | jmp                 4
            //   47                   | inc                 edi
            //   4e                   | dec                 esi
            //   803f00               | cmp                 byte ptr [edi], 0
            //   75f9                 | jne                 0xfffffffb
            //   53                   | push                ebx

        $sequence_5 = { 50 68???????? e8???????? 8b1d???????? 8d442448 59 59 }
            // n = 7, score = 400
            //   50                   | push                eax
            //   68????????           |                     
            //   e8????????           |                     
            //   8b1d????????         |                     
            //   8d442448             | lea                 eax, [esp + 0x48]
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx

        $sequence_6 = { ffd7 8d842494000000 896c2410 50 68???????? }
            // n = 5, score = 400
            //   ffd7                 | call                edi
            //   8d842494000000       | lea                 eax, [esp + 0x94]
            //   896c2410             | mov                 dword ptr [esp + 0x10], ebp
            //   50                   | push                eax
            //   68????????           |                     

        $sequence_7 = { e8???????? 85c0 0f8584000000 8b85e8feffff 8b7508 }
            // n = 5, score = 400
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   0f8584000000         | jne                 0x8a
            //   8b85e8feffff         | mov                 eax, dword ptr [ebp - 0x118]
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]

        $sequence_8 = { a5 a5 ff5150 8b45fc 8d75c4 83ec10 8bfc }
            // n = 7, score = 400
            //   a5                   | movsd               dword ptr es:[edi], dword ptr [esi]
            //   a5                   | movsd               dword ptr es:[edi], dword ptr [esi]
            //   ff5150               | call                dword ptr [ecx + 0x50]
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8d75c4               | lea                 esi, [ebp - 0x3c]
            //   83ec10               | sub                 esp, 0x10
            //   8bfc                 | mov                 edi, esp

        $sequence_9 = { b805400080 eb76 ff7508 ff15???????? }
            // n = 4, score = 400
            //   b805400080           | mov                 eax, 0x80004005
            //   eb76                 | jmp                 0x78
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 40960
}