rule win_icedid_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-29"
        version = "1"
        description = "Detects win.icedid."
        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"
        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 = { ff15???????? 85c0 7511 56 57 }
            // n = 5, score = 1300
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7511                 | jne                 0x13
            //   56                   | push                esi
            //   57                   | push                edi

        $sequence_1 = { 0fb705???????? 50 51 0fb60d???????? }
            // n = 4, score = 1300
            //   0fb705????????       |                     
            //   50                   | push                eax
            //   51                   | push                ecx
            //   0fb60d????????       |                     

        $sequence_2 = { ff773c 51 51 ff15???????? }
            // n = 4, score = 1300
            //   ff773c               | push                dword ptr [edi + 0x3c]
            //   51                   | push                ecx
            //   51                   | push                ecx
            //   ff15????????         |                     

        $sequence_3 = { ff15???????? 85c0 7420 837c241000 7419 }
            // n = 5, score = 1300
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7420                 | je                  0x22
            //   837c241000           | cmp                 dword ptr [esp + 0x10], 0
            //   7419                 | je                  0x1b

        $sequence_4 = { ff36 6a08 ff15???????? 50 ff15???????? eb0f }
            // n = 6, score = 1300
            //   ff36                 | push                dword ptr [esi]
            //   6a08                 | push                8
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   eb0f                 | jmp                 0x11

        $sequence_5 = { 8bec 56 8d4510 50 ff750c 6a00 }
            // n = 6, score = 1300
            //   8bec                 | mov                 ebp, esp
            //   56                   | push                esi
            //   8d4510               | lea                 eax, [ebp + 0x10]
            //   50                   | push                eax
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   6a00                 | push                0

        $sequence_6 = { ff15???????? 50 ff15???????? 8bf7 8bc6 eb02 }
            // n = 6, score = 1300
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bf7                 | mov                 esi, edi
            //   8bc6                 | mov                 eax, esi
            //   eb02                 | jmp                 4

        $sequence_7 = { 6a3b 56 ff15???????? 8bf8 }
            // n = 4, score = 1300
            //   6a3b                 | push                0x3b
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8bf8                 | mov                 edi, eax

        $sequence_8 = { 8bf0 8d45fc 50 ff75fc 6a05 }
            // n = 5, score = 1000
            //   8bf0                 | mov                 esi, eax
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   6a05                 | push                5

        $sequence_9 = { 3b7820 72d1 5b 33c0 }
            // n = 4, score = 800
            //   3b7820               | cmp                 edi, dword ptr [eax + 0x20]
            //   72d1                 | jb                  0xffffffd3
            //   5b                   | pop                 ebx
            //   33c0                 | xor                 eax, eax

        $sequence_10 = { 51 51 8b4c240c 53 55 56 }
            // n = 6, score = 800
            //   51                   | push                ecx
            //   51                   | push                ecx
            //   8b4c240c             | mov                 ecx, dword ptr [esp + 0xc]
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   56                   | push                esi

        $sequence_11 = { 3bfd 72c4 8b542414 0302 833800 759f }
            // n = 6, score = 800
            //   3bfd                 | cmp                 edi, ebp
            //   72c4                 | jb                  0xffffffc6
            //   8b542414             | mov                 edx, dword ptr [esp + 0x14]
            //   0302                 | add                 eax, dword ptr [edx]
            //   833800               | cmp                 dword ptr [eax], 0
            //   759f                 | jne                 0xffffffa1

        $sequence_12 = { 0fb6440b34 50 ff740b28 8b440b24 }
            // n = 4, score = 800
            //   0fb6440b34           | movzx               eax, byte ptr [ebx + ecx + 0x34]
            //   50                   | push                eax
            //   ff740b28             | push                dword ptr [ebx + ecx + 0x28]
            //   8b440b24             | mov                 eax, dword ptr [ebx + ecx + 0x24]

        $sequence_13 = { 8d5004 89542414 8b12 85d2 7454 8d6af8 d1ed }
            // n = 7, score = 800
            //   8d5004               | lea                 edx, [eax + 4]
            //   89542414             | mov                 dword ptr [esp + 0x14], edx
            //   8b12                 | mov                 edx, dword ptr [edx]
            //   85d2                 | test                edx, edx
            //   7454                 | je                  0x56
            //   8d6af8               | lea                 ebp, [edx - 8]
            //   d1ed                 | shr                 ebp, 1

        $sequence_14 = { 8954241c 66c16c241c0c 0fb7d2 c744241000100000 663b542410 7215 }
            // n = 6, score = 800
            //   8954241c             | mov                 dword ptr [esp + 0x1c], edx
            //   66c16c241c0c         | shr                 word ptr [esp + 0x1c], 0xc
            //   0fb7d2               | movzx               edx, dx
            //   c744241000100000     | mov                 dword ptr [esp + 0x10], 0x1000
            //   663b542410           | cmp                 dx, word ptr [esp + 0x10]
            //   7215                 | jb                  0x17

        $sequence_15 = { 5f 743f 8d5808 0fb713 8954241c }
            // n = 5, score = 800
            //   5f                   | pop                 edi
            //   743f                 | je                  0x41
            //   8d5808               | lea                 ebx, [eax + 8]
            //   0fb713               | movzx               edx, word ptr [ebx]
            //   8954241c             | mov                 dword ptr [esp + 0x1c], edx

        $sequence_16 = { ff15???????? 85c0 750a b8010000c0 }
            // n = 4, score = 400
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   750a                 | jne                 0xc
            //   b8010000c0           | mov                 eax, 0xc0000001

        $sequence_17 = { 8a4173 a808 75f5 a804 7406 }
            // n = 5, score = 400
            //   8a4173               | mov                 al, byte ptr [ecx + 0x73]
            //   a808                 | test                al, 8
            //   75f5                 | jne                 0xfffffff7
            //   a804                 | test                al, 4
            //   7406                 | je                  8

        $sequence_18 = { ff5010 85c0 7407 33c0 e9???????? }
            // n = 5, score = 400
            //   ff5010               | call                dword ptr [eax + 0x10]
            //   85c0                 | test                eax, eax
            //   7407                 | je                  9
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     

        $sequence_19 = { 48 8b454f 48 89442420 ff15???????? 48 }
            // n = 6, score = 200
            //   48                   | dec                 eax
            //   8b454f               | mov                 eax, dword ptr [ebp + 0x4f]
            //   48                   | dec                 eax
            //   89442420             | mov                 dword ptr [esp + 0x20], eax
            //   ff15????????         |                     
            //   48                   | dec                 eax

        $sequence_20 = { 2407 40 882b 41 02fd 3c05 }
            // n = 6, score = 200
            //   2407                 | and                 al, 7
            //   40                   | inc                 eax
            //   882b                 | mov                 byte ptr [ebx], ch
            //   41                   | inc                 ecx
            //   02fd                 | add                 bh, ch
            //   3c05                 | cmp                 al, 5

        $sequence_21 = { 8bd8 4c 8b05???????? 48 8bd3 48 }
            // n = 6, score = 200
            //   8bd8                 | mov                 ebx, eax
            //   4c                   | dec                 esp
            //   8b05????????         |                     
            //   48                   | dec                 eax
            //   8bd3                 | mov                 edx, ebx
            //   48                   | dec                 eax

        $sequence_22 = { 884303 49 03f5 2407 40 }
            // n = 5, score = 200
            //   884303               | mov                 byte ptr [ebx + 3], al
            //   49                   | dec                 ecx
            //   03f5                 | add                 esi, ebp
            //   2407                 | and                 al, 7
            //   40                   | inc                 eax

        $sequence_23 = { 8d4c2420 e8???????? 83f8ff 7537 48 8d542420 }
            // n = 6, score = 200
            //   8d4c2420             | lea                 ecx, [esp + 0x20]
            //   e8????????           |                     
            //   83f8ff               | cmp                 eax, -1
            //   7537                 | jne                 0x39
            //   48                   | dec                 eax
            //   8d542420             | lea                 edx, [esp + 0x20]

        $sequence_24 = { 0f84f9000000 ff15???????? 488bc8 4c8d4701 8d5308 }
            // n = 5, score = 100
            //   0f84f9000000         | cmp                 dword ptr [edx + 0x10], 0
            //   ff15????????         |                     
            //   488bc8               | dec                 eax
            //   4c8d4701             | mov                 esi, ecx
            //   8d5308               | je                  0xa2

        $sequence_25 = { 488bd3 488bce e8???????? 85c0 74a3 488bd3 488bce }
            // n = 7, score = 100
            //   488bd3               | dec                 eax
            //   488bce               | lea                 ebp, [esp - 0x270]
            //   e8????????           |                     
            //   85c0                 | dec                 eax
            //   74a3                 | sub                 esp, 0x370
            //   488bd3               | dec                 eax
            //   488bce               | lea                 edx, [ebp + 0x15a]

        $sequence_26 = { 482178d8 4c8bfa 2178d0 4533c9 4533c0 }
            // n = 5, score = 100
            //   482178d8             | dec                 eax
            //   4c8bfa               | and                 dword ptr [eax - 0x28], edi
            //   2178d0               | dec                 esp
            //   4533c9               | mov                 edi, edx
            //   4533c0               | and                 dword ptr [eax - 0x30], edi

        $sequence_27 = { 5d c3 488b0d???????? 488d050d1e0000 }
            // n = 4, score = 100
            //   5d                   | je                  0xffffffad
            //   c3                   | dec                 eax
            //   488b0d????????       |                     
            //   488d050d1e0000       | mov                 edx, ebx

        $sequence_28 = { 488d152b0d0000 85c0 7507 488d151c0d0000 ff15???????? }
            // n = 5, score = 100
            //   488d152b0d0000       | dec                 eax
            //   85c0                 | mov                 ecx, esi
            //   7507                 | xor                 eax, eax
            //   488d151c0d0000       | jmp                 7
            //   ff15????????         |                     

        $sequence_29 = { 837a1000 488bf1 0f8499000000 8b5a10 4803d9 }
            // n = 5, score = 100
            //   837a1000             | dec                 eax
            //   488bf1               | mov                 edx, ebx
            //   0f8499000000         | dec                 eax
            //   8b5a10               | mov                 ecx, esi
            //   4803d9               | test                eax, eax

        $sequence_30 = { e9???????? ff15???????? 33c0 eb05 }
            // n = 4, score = 100
            //   e9????????           |                     
            //   ff15????????         |                     
            //   33c0                 | dec                 eax
            //   eb05                 | lea                 ecx, [ebp + 0x56]

        $sequence_31 = { 488dac2490fdffff 4881ec70030000 488d955a010000 488d4d56 }
            // n = 4, score = 100
            //   488dac2490fdffff     | inc                 ebp
            //   4881ec70030000       | xor                 ecx, ecx
            //   488d955a010000       | inc                 ebp
            //   488d4d56             | xor                 eax, eax

    condition:
        7 of them and filesize < 303104
}