rule win_icedid_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "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 = { 742c 803e00 7427 6a3b 56 ff15???????? 8bf8 }
            // n = 7, score = 1300
            //   742c                 | je                  0x2e
            //   803e00               | cmp                 byte ptr [esi], 0
            //   7427                 | je                  0x29
            //   6a3b                 | push                0x3b
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8bf8                 | mov                 edi, eax

        $sequence_1 = { ff15???????? 8bf7 8bc6 eb02 }
            // n = 4, score = 1300
            //   ff15????????         |                     
            //   8bf7                 | mov                 esi, edi
            //   8bc6                 | mov                 eax, esi
            //   eb02                 | jmp                 4

        $sequence_2 = { 50 ff15???????? 33c0 40 eb11 }
            // n = 5, score = 1300
            //   50                   | push                eax
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   40                   | inc                 eax
            //   eb11                 | jmp                 0x13

        $sequence_3 = { 50 ff773c 51 51 ff15???????? }
            // n = 5, score = 1300
            //   50                   | push                eax
            //   ff773c               | push                dword ptr [edi + 0x3c]
            //   51                   | push                ecx
            //   51                   | push                ecx
            //   ff15????????         |                     

        $sequence_4 = { 7411 40 50 6a08 ff15???????? }
            // n = 5, score = 1300
            //   7411                 | je                  0x13
            //   40                   | inc                 eax
            //   50                   | push                eax
            //   6a08                 | push                8
            //   ff15????????         |                     

        $sequence_5 = { 50 0fb705???????? 50 51 0fb60d???????? }
            // n = 5, score = 1300
            //   50                   | push                eax
            //   0fb705????????       |                     
            //   50                   | push                eax
            //   51                   | push                ecx
            //   0fb60d????????       |                     

        $sequence_6 = { ff15???????? 50 ff15???????? 8bc6 eb02 }
            // n = 5, score = 1300
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bc6                 | mov                 eax, esi
            //   eb02                 | jmp                 4

        $sequence_7 = { 6905????????e8030000 50 ff35???????? ff15???????? }
            // n = 4, score = 1300
            //   6905????????e8030000     |     
            //   50                   | push                eax
            //   ff35????????         |                     
            //   ff15????????         |                     

        $sequence_8 = { e8???????? 8bf0 8d45fc 50 ff75fc 6a05 }
            // n = 6, score = 1000
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   6a05                 | push                5

        $sequence_9 = { 03c2 eb5c 8d5004 89542414 8b12 }
            // n = 5, score = 800
            //   03c2                 | add                 eax, edx
            //   eb5c                 | jmp                 0x5e
            //   8d5004               | lea                 edx, [eax + 4]
            //   89542414             | mov                 dword ptr [esp + 0x14], edx
            //   8b12                 | mov                 edx, dword ptr [edx]

        $sequence_10 = { 8d5808 0fb713 8954241c 66c16c241c0c 0fb7d2 c744241000100000 663b542410 }
            // n = 7, score = 800
            //   8d5808               | lea                 ebx, [eax + 8]
            //   0fb713               | movzx               edx, word ptr [ebx]
            //   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]

        $sequence_11 = { 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_12 = { 33ff 397820 7633 53 }
            // n = 4, score = 800
            //   33ff                 | xor                 edi, edi
            //   397820               | cmp                 dword ptr [eax + 0x20], edi
            //   7633                 | jbe                 0x35
            //   53                   | push                ebx

        $sequence_13 = { 47 3b7820 72d1 5b 33c0 40 }
            // n = 6, score = 800
            //   47                   | inc                 edi
            //   3b7820               | cmp                 edi, dword ptr [eax + 0x20]
            //   72d1                 | jb                  0xffffffd3
            //   5b                   | pop                 ebx
            //   33c0                 | xor                 eax, eax
            //   40                   | inc                 eax

        $sequence_14 = { ff7008 ff36 e8???????? 83c40c }
            // n = 4, score = 800
            //   ff7008               | push                dword ptr [eax + 8]
            //   ff36                 | push                dword ptr [esi]
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

        $sequence_15 = { 8d4508 50 0fb6440b34 50 ff740b28 }
            // n = 5, score = 800
            //   8d4508               | lea                 eax, [ebp + 8]
            //   50                   | push                eax
            //   0fb6440b34           | movzx               eax, byte ptr [ebx + ecx + 0x34]
            //   50                   | push                eax
            //   ff740b28             | push                dword ptr [ebx + ecx + 0x28]

        $sequence_16 = { a808 75f5 a804 7406 }
            // n = 4, score = 400
            //   a808                 | test                al, 8
            //   75f5                 | jne                 0xfffffff7
            //   a804                 | test                al, 4
            //   7406                 | je                  8

        $sequence_17 = { ff5010 85c0 7407 33c0 }
            // n = 4, score = 400
            //   ff5010               | call                dword ptr [eax + 0x10]
            //   85c0                 | test                eax, eax
            //   7407                 | je                  9
            //   33c0                 | xor                 eax, eax

        $sequence_18 = { ff15???????? 85c0 750a b8010000c0 }
            // n = 4, score = 400
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   750a                 | jne                 0xc
            //   b8010000c0           | mov                 eax, 0xc0000001

        $sequence_19 = { 41 be00010000 c745f47f000001 41 0fb7c6 }
            // n = 5, score = 200
            //   41                   | inc                 ecx
            //   be00010000           | mov                 esi, 0x100
            //   c745f47f000001       | mov                 dword ptr [ebp - 0xc], 0x100007f
            //   41                   | inc                 ecx
            //   0fb7c6               | movzx               eax, si

        $sequence_20 = { 6bd83c 803c1300 0f8493000000 44 }
            // n = 4, score = 200
            //   6bd83c               | imul                ebx, eax, 0x3c
            //   803c1300             | cmp                 byte ptr [ebx + edx], 0
            //   0f8493000000         | je                  0x99
            //   44                   | inc                 esp

        $sequence_21 = { 393b 7624 0fb7c6 48 8d4b04 }
            // n = 5, score = 200
            //   393b                 | cmp                 dword ptr [ebx], edi
            //   7624                 | jbe                 0x26
            //   0fb7c6               | movzx               eax, si
            //   48                   | dec                 eax
            //   8d4b04               | lea                 ecx, [ebx + 4]

        $sequence_22 = { 4c 8bc0 0f31 48 c1e220 48 }
            // n = 6, score = 200
            //   4c                   | dec                 esp
            //   8bc0                 | mov                 eax, eax
            //   0f31                 | rdtsc               
            //   48                   | dec                 eax
            //   c1e220               | shl                 edx, 0x20
            //   48                   | dec                 eax

        $sequence_23 = { 0f85f0000000 8b4150 ba0b010000 66395118 }
            // n = 4, score = 200
            //   0f85f0000000         | jne                 0xf6
            //   8b4150               | mov                 eax, dword ptr [ecx + 0x50]
            //   ba0b010000           | mov                 edx, 0x10b
            //   66395118             | cmp                 word ptr [ecx + 0x18], dx

        $sequence_24 = { 8bd8 49891e 85c0 7466 }
            // n = 4, score = 100
            //   8bd8                 | lea                 eax, [0xffffffd3]
            //   49891e               | and                 dword ptr [esp + 0x20], 0
            //   85c0                 | inc                 ebp
            //   7466                 | xor                 ecx, ecx

        $sequence_25 = { 2178d0 4533c9 4533c0 c740c803000000 ba00000080 }
            // n = 5, score = 100
            //   2178d0               | test                eax, eax
            //   4533c9               | jne                 0xd
            //   4533c0               | and                 dword ptr [eax - 0x30], edi
            //   c740c803000000       | inc                 ebp
            //   ba00000080           | xor                 ecx, ecx

        $sequence_26 = { ff15???????? 33c0 e9???????? 8bd7 397b1c 7640 }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   33c0                 | je                  0x5a
            //   e9????????           |                     
            //   8bd7                 | inc                 ebp
            //   397b1c               | test                edx, edx
            //   7640                 | je                  0x25

        $sequence_27 = { 4885ff 0f84f9000000 ff15???????? 488bc8 4c8d4701 8d5308 }
            // n = 6, score = 100
            //   4885ff               | dec                 eax
            //   0f84f9000000         | sub                 esp, 0x38
            //   ff15????????         |                     
            //   488bc8               | dec                 eax
            //   4c8d4701             | and                 dword ptr [esp + 0x28], 0
            //   8d5308               | dec                 esp

        $sequence_28 = { 4883ec38 488364242800 4c8d05d3ffffff 8364242000 4533c9 }
            // n = 5, score = 100
            //   4883ec38             | mov                 edi, dword ptr [ebp + 0x298]
            //   488364242800         | dec                 eax
            //   4c8d05d3ffffff       | mov                 ebx, esi
            //   8364242000           | dec                 eax
            //   4533c9               | and                 dword ptr [esp + 0x38], 0

        $sequence_29 = { 7458 4585d2 7420 4885db }
            // n = 4, score = 100
            //   7458                 | inc                 ebp
            //   4585d2               | xor                 eax, eax
            //   7420                 | mov                 dword ptr [eax - 0x38], 3
            //   4885db               | mov                 edx, 0x80000000

        $sequence_30 = { 488d9590020000 488d4d56 e8???????? 85c0 750b ff15???????? e9???????? }
            // n = 7, score = 100
            //   488d9590020000       | dec                 eax
            //   488d4d56             | lea                 edx, [ebp + 0x290]
            //   e8????????           |                     
            //   85c0                 | dec                 eax
            //   750b                 | lea                 ecx, [ebp + 0x56]
            //   ff15????????         |                     
            //   e9????????           |                     

        $sequence_31 = { 488bbd98020000 488bde 488364243800 4883c7f0 4c8bf6 4889742420 48895c2428 }
            // n = 7, score = 100
            //   488bbd98020000       | dec                 eax
            //   488bde               | test                ebx, ebx
            //   488364243800         | xor                 eax, eax
            //   4883c7f0             | mov                 edx, edi
            //   4c8bf6               | cmp                 dword ptr [ebx + 0x1c], edi
            //   4889742420           | jbe                 0x47
            //   48895c2428           | dec                 eax

    condition:
        7 of them and filesize < 303104
}