rule win_icedid_downloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        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 = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { 50 8d45f0 50 8d45d0 50 ff15???????? }
            // n = 6, score = 400
            //   50                   | push                eax
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   8d45d0               | lea                 eax, [ebp - 0x30]
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_1 = { 85f6 0f85fb000000 8d442440 50 68???????? e8???????? 59 }
            // n = 7, score = 400
            //   85f6                 | test                esi, esi
            //   0f85fb000000         | jne                 0x101
            //   8d442440             | lea                 eax, [esp + 0x40]
            //   50                   | push                eax
            //   68????????           |                     
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_2 = { 55 8d6c2494 81ecb8000000 a1???????? 56 }
            // n = 5, score = 400
            //   55                   | push                ebp
            //   8d6c2494             | lea                 ebp, [esp - 0x6c]
            //   81ecb8000000         | sub                 esp, 0xb8
            //   a1????????           |                     
            //   56                   | push                esi

        $sequence_3 = { 64a118000000 59 59 6804010000 8b4030 8945fc 8d85a8fdffff }
            // n = 7, score = 400
            //   64a118000000         | mov                 eax, dword ptr fs:[0x18]
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   6804010000           | push                0x104
            //   8b4030               | mov                 eax, dword ptr [eax + 0x30]
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8d85a8fdffff         | lea                 eax, [ebp - 0x258]

        $sequence_4 = { 895dfc ff15???????? 8d45fc 50 68???????? 6a01 53 }
            // n = 7, score = 400
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   ff15????????         |                     
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   68????????           |                     
            //   6a01                 | push                1
            //   53                   | push                ebx

        $sequence_5 = { ff7510 8b45ec ff750c ff7010 ff75f4 e8???????? }
            // n = 6, score = 400
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7010               | push                dword ptr [eax + 0x10]
            //   ff75f4               | push                dword ptr [ebp - 0xc]
            //   e8????????           |                     

        $sequence_6 = { 7575 0fb74004 663b4204 756b ff74241c ff15???????? }
            // n = 6, score = 400
            //   7575                 | jne                 0x77
            //   0fb74004             | movzx               eax, word ptr [eax + 4]
            //   663b4204             | cmp                 ax, word ptr [edx + 4]
            //   756b                 | jne                 0x6d
            //   ff74241c             | push                dword ptr [esp + 0x1c]
            //   ff15????????         |                     

        $sequence_7 = { e8???????? 59 59 8d442440 50 ffd3 }
            // n = 6, score = 400
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   8d442440             | lea                 eax, [esp + 0x40]
            //   50                   | push                eax
            //   ffd3                 | call                ebx

        $sequence_8 = { 7821 395df8 741c 6a04 8d45f8 }
            // n = 5, score = 400
            //   7821                 | js                  0x23
            //   395df8               | cmp                 dword ptr [ebp - 8], ebx
            //   741c                 | je                  0x1e
            //   6a04                 | push                4
            //   8d45f8               | lea                 eax, [ebp - 8]

        $sequence_9 = { 55 57 51 ff520c 8b2d???????? 8bf0 }
            // n = 6, score = 400
            //   55                   | push                ebp
            //   57                   | push                edi
            //   51                   | push                ecx
            //   ff520c               | call                dword ptr [edx + 0xc]
            //   8b2d????????         |                     
            //   8bf0                 | mov                 esi, eax

    condition:
        7 of them and filesize < 40960
}