rule win_icedid_downloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        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 = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 740a 83c002 663910 75eb }
            // n = 4, score = 400
            //   740a                 | je                  0xc
            //   83c002               | add                 eax, 2
            //   663910               | cmp                 word ptr [eax], dx
            //   75eb                 | jne                 0xffffffed

        $sequence_1 = { 8b4d08 8901 33c0 40 8be5 }
            // n = 5, score = 400
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   8901                 | mov                 dword ptr [ecx], eax
            //   33c0                 | xor                 eax, eax
            //   40                   | inc                 eax
            //   8be5                 | mov                 esp, ebp

        $sequence_2 = { 83c8ff 668954242c 6689442434 8d54242c 8b442414 }
            // n = 5, score = 400
            //   83c8ff               | or                  eax, 0xffffffff
            //   668954242c           | mov                 word ptr [esp + 0x2c], dx
            //   6689442434           | mov                 word ptr [esp + 0x34], ax
            //   8d54242c             | lea                 edx, [esp + 0x2c]
            //   8b442414             | mov                 eax, dword ptr [esp + 0x14]

        $sequence_3 = { 85f6 7412 ff7558 e8???????? }
            // n = 4, score = 400
            //   85f6                 | test                esi, esi
            //   7412                 | je                  0x14
            //   ff7558               | push                dword ptr [ebp + 0x58]
            //   e8????????           |                     

        $sequence_4 = { e8???????? 8d45b4 897518 50 68???????? c7451c40000000 }
            // n = 6, score = 400
            //   e8????????           |                     
            //   8d45b4               | lea                 eax, [ebp - 0x4c]
            //   897518               | mov                 dword ptr [ebp + 0x18], esi
            //   50                   | push                eax
            //   68????????           |                     
            //   c7451c40000000       | mov                 dword ptr [ebp + 0x1c], 0x40

        $sequence_5 = { 8bf8 56 8d442420 50 8b11 }
            // n = 5, score = 400
            //   8bf8                 | mov                 edi, eax
            //   56                   | push                esi
            //   8d442420             | lea                 eax, [esp + 0x20]
            //   50                   | push                eax
            //   8b11                 | mov                 edx, dword ptr [ecx]

        $sequence_6 = { e8???????? 85c0 7847 395df4 7442 8d45f8 50 }
            // n = 7, score = 400
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7847                 | js                  0x49
            //   395df4               | cmp                 dword ptr [ebp - 0xc], ebx
            //   7442                 | je                  0x44
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   50                   | push                eax

        $sequence_7 = { 8bfc 6a04 8b08 a5 50 a5 }
            // n = 6, score = 400
            //   8bfc                 | mov                 edi, esp
            //   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]

        $sequence_8 = { 53 8d45f0 66c745e80010 50 33db 6800000002 }
            // n = 6, score = 400
            //   53                   | push                ebx
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   66c745e80010         | mov                 word ptr [ebp - 0x18], 0x1000
            //   50                   | push                eax
            //   33db                 | xor                 ebx, ebx
            //   6800000002           | push                0x2000000

        $sequence_9 = { 8b4e08 8b4718 3b4108 7520 ff36 }
            // n = 5, score = 400
            //   8b4e08               | mov                 ecx, dword ptr [esi + 8]
            //   8b4718               | mov                 eax, dword ptr [edi + 0x18]
            //   3b4108               | cmp                 eax, dword ptr [ecx + 8]
            //   7520                 | jne                 0x22
            //   ff36                 | push                dword ptr [esi]

    condition:
        7 of them and filesize < 40960
}