rule win_photoloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.photoloader."
        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.photoloader"
        malpedia_rule_date = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 4c8d9c2440010000 4898 498b7318 4803c3 }
            // n = 4, score = 300
            //   4c8d9c2440010000     | dec                 eax
            //   4898                 | lea                 edx, dword ptr [ebp + 0x60]
            //   498b7318             | inc                 esp
            //   4803c3               | mov                 dword ptr [ebp + 0x60], esi

        $sequence_1 = { e8???????? 488d5560 44897560 488d4c2440 488bd8 ff15???????? }
            // n = 6, score = 300
            //   e8????????           |                     
            //   488d5560             | dec                 eax
            //   44897560             | inc                 edx
            //   488d4c2440           | dec                 ecx
            //   488bd8               | sub                 eax, 1
            //   ff15????????         |                     

        $sequence_2 = { 488d542448 33c9 ffd5 83f86f }
            // n = 4, score = 300
            //   488d542448           | dec                 eax
            //   33c9                 | sub                 esi, edx
            //   ffd5                 | mov                 cl, byte ptr [edx]
            //   83f86f               | mov                 byte ptr [esi + edx], cl

        $sequence_3 = { 488bc8 ff15???????? 4885f6 0f8463ffffff }
            // n = 4, score = 300
            //   488bc8               | dec                 eax
            //   ff15????????         |                     
            //   4885f6               | lea                 ecx, dword ptr [esp + 0x40]
            //   0f8463ffffff         | dec                 eax

        $sequence_4 = { 488bc8 ff15???????? 488bf8 4885c0 0f84b8000000 448bcb }
            // n = 6, score = 300
            //   488bc8               | dec                 eax
            //   ff15????????         |                     
            //   488bf8               | lea                 edx, dword ptr [esp + 0x48]
            //   4885c0               | xor                 ecx, ecx
            //   0f84b8000000         | call                ebp
            //   448bcb               | cmp                 eax, 0x6f

        $sequence_5 = { 4d85c0 7411 482bf2 8a0a 880c16 48ffc2 4983e801 }
            // n = 7, score = 300
            //   4d85c0               | jne                 0xb
            //   7411                 | cmp                 byte ptr [ebx + 0x1c1], 0x2e
            //   482bf2               | je                  0x39
            //   8a0a                 | mov                 ecx, dword ptr [ebx + 0x194]
            //   880c16               | dec                 ebp
            //   48ffc2               | test                eax, eax
            //   4983e801             | je                  0x13

        $sequence_6 = { 03c6 894758 b801000000 488b5c2430 488b742438 4883c420 }
            // n = 6, score = 300
            //   03c6                 | add                 eax, esi
            //   894758               | mov                 dword ptr [edi + 0x58], eax
            //   b801000000           | mov                 eax, 1
            //   488b5c2430           | dec                 eax
            //   488b742438           | mov                 ebx, dword ptr [esp + 0x30]
            //   4883c420             | dec                 eax

        $sequence_7 = { 488bdf 80bbc001000030 7509 80bbc10100002e 742e 8b8b94010000 }
            // n = 6, score = 300
            //   488bdf               | mov                 esi, dword ptr [esp + 0x38]
            //   80bbc001000030       | dec                 eax
            //   7509                 | add                 esp, 0x20
            //   80bbc10100002e       | dec                 eax
            //   742e                 | mov                 ebx, edi
            //   8b8b94010000         | cmp                 byte ptr [ebx + 0x1c0], 0x30

        $sequence_8 = { 8a441c14 02c2 0fb6c0 8a440414 }
            // n = 4, score = 200
            //   8a441c14             | mov                 al, byte ptr [esp + ebx + 0x14]
            //   02c2                 | add                 al, dl
            //   0fb6c0               | movzx               eax, al
            //   8a440414             | mov                 al, byte ptr [esp + eax + 0x14]

        $sequence_9 = { 7466 03f7 803e2f 7506 807e012f 74e5 807e043a }
            // n = 7, score = 200
            //   7466                 | je                  0x68
            //   03f7                 | add                 esi, edi
            //   803e2f               | cmp                 byte ptr [esi], 0x2f
            //   7506                 | jne                 8
            //   807e012f             | cmp                 byte ptr [esi + 1], 0x2f
            //   74e5                 | je                  0xffffffe7
            //   807e043a             | cmp                 byte ptr [esi + 4], 0x3a

        $sequence_10 = { 0fb6d1 02c2 0fb6c0 89442410 }
            // n = 4, score = 200
            //   0fb6d1               | movzx               edx, cl
            //   02c2                 | add                 al, dl
            //   0fb6c0               | movzx               eax, al
            //   89442410             | mov                 dword ptr [esp + 0x10], eax

        $sequence_11 = { 8d5202 0fb702 8be8 6685c0 }
            // n = 4, score = 200
            //   8d5202               | lea                 edx, dword ptr [edx + 2]
            //   0fb702               | movzx               eax, word ptr [edx]
            //   8be8                 | mov                 ebp, eax
            //   6685c0               | test                ax, ax

        $sequence_12 = { 8b35???????? 6801200000 6a08 ff15???????? 50 ff15???????? }
            // n = 6, score = 200
            //   8b35????????         |                     
            //   6801200000           | push                0x2001
            //   6a08                 | push                8
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_13 = { 81c420010000 c3 33c0 40 ebf0 }
            // n = 5, score = 200
            //   81c420010000         | add                 esp, 0x120
            //   c3                   | ret                 
            //   33c0                 | xor                 eax, eax
            //   40                   | inc                 eax
            //   ebf0                 | jmp                 0xfffffff2

        $sequence_14 = { b8bb010000 895de4 668945e8 83c40c 8b4508 c745ec01000000 }
            // n = 6, score = 200
            //   b8bb010000           | mov                 eax, 0x1bb
            //   895de4               | mov                 dword ptr [ebp - 0x1c], ebx
            //   668945e8             | mov                 word ptr [ebp - 0x18], ax
            //   83c40c               | add                 esp, 0xc
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   c745ec01000000       | mov                 dword ptr [ebp - 0x14], 1

        $sequence_15 = { 5d eb02 33c0 5e 5b 81c404010000 }
            // n = 6, score = 200
            //   5d                   | pop                 ebp
            //   eb02                 | jmp                 4
            //   33c0                 | xor                 eax, eax
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   81c404010000         | add                 esp, 0x104

    condition:
        7 of them and filesize < 81920
}