rule win_sendsafe_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.sendsafe."
        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.sendsafe"
        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 = { e8???????? 8b8c2498000000 53 55 56 8bb4249c000000 33ed }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8b8c2498000000       | mov                 ecx, dword ptr [esp + 0x98]
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   56                   | push                esi
            //   8bb4249c000000       | mov                 esi, dword ptr [esp + 0x9c]
            //   33ed                 | xor                 ebp, ebp

        $sequence_1 = { 8b55fc c78234010000ffffffff 8b45fc c7803801000000000000 837d0800 743d 8b4d08 }
            // n = 7, score = 200
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   c78234010000ffffffff     | mov    dword ptr [edx + 0x134], 0xffffffff
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   c7803801000000000000     | mov    dword ptr [eax + 0x138], 0
            //   837d0800             | cmp                 dword ptr [ebp + 8], 0
            //   743d                 | je                  0x3f
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]

        $sequence_2 = { ffb5e8efffff e8???????? 8b8de0efffff 8bf0 8b85f0efffff 83c410 8b048590945b00 }
            // n = 7, score = 200
            //   ffb5e8efffff         | push                dword ptr [ebp - 0x1018]
            //   e8????????           |                     
            //   8b8de0efffff         | mov                 ecx, dword ptr [ebp - 0x1020]
            //   8bf0                 | mov                 esi, eax
            //   8b85f0efffff         | mov                 eax, dword ptr [ebp - 0x1010]
            //   83c410               | add                 esp, 0x10
            //   8b048590945b00       | mov                 eax, dword ptr [eax*4 + 0x5b9490]

        $sequence_3 = { e8???????? 89a534f6ffff 8b9534f6ffff 8995b0f6ffff eb18 8b85c8f6ffff 50 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   89a534f6ffff         | mov                 dword ptr [ebp - 0x9cc], esp
            //   8b9534f6ffff         | mov                 edx, dword ptr [ebp - 0x9cc]
            //   8995b0f6ffff         | mov                 dword ptr [ebp - 0x950], edx
            //   eb18                 | jmp                 0x1a
            //   8b85c8f6ffff         | mov                 eax, dword ptr [ebp - 0x938]
            //   50                   | push                eax

        $sequence_4 = { 8b55dc 0355f8 8b45f4 8a0c08 880a 8b55f4 83c204 }
            // n = 7, score = 200
            //   8b55dc               | mov                 edx, dword ptr [ebp - 0x24]
            //   0355f8               | add                 edx, dword ptr [ebp - 8]
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   8a0c08               | mov                 cl, byte ptr [eax + ecx]
            //   880a                 | mov                 byte ptr [edx], cl
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   83c204               | add                 edx, 4

        $sequence_5 = { 8b4dec 83e901 894dec 837dec00 7e13 8b55f4 8a45ff }
            // n = 7, score = 200
            //   8b4dec               | mov                 ecx, dword ptr [ebp - 0x14]
            //   83e901               | sub                 ecx, 1
            //   894dec               | mov                 dword ptr [ebp - 0x14], ecx
            //   837dec00             | cmp                 dword ptr [ebp - 0x14], 0
            //   7e13                 | jle                 0x15
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   8a45ff               | mov                 al, byte ptr [ebp - 1]

        $sequence_6 = { ff15???????? 33c0 e9???????? 8b951470ffff 83c210 89950070ffff 8b850070ffff }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     
            //   8b951470ffff         | mov                 edx, dword ptr [ebp - 0x8fec]
            //   83c210               | add                 edx, 0x10
            //   89950070ffff         | mov                 dword ptr [ebp - 0x9000], edx
            //   8b850070ffff         | mov                 eax, dword ptr [ebp - 0x9000]

        $sequence_7 = { 8b906c010000 3b9170010000 7f0c 8b4508 83b87001000040 7c04 c645ff01 }
            // n = 7, score = 200
            //   8b906c010000         | mov                 edx, dword ptr [eax + 0x16c]
            //   3b9170010000         | cmp                 edx, dword ptr [ecx + 0x170]
            //   7f0c                 | jg                  0xe
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   83b87001000040       | cmp                 dword ptr [eax + 0x170], 0x40
            //   7c04                 | jl                  6
            //   c645ff01             | mov                 byte ptr [ebp - 1], 1

        $sequence_8 = { e8???????? 83c428 c745e000000000 eb09 8b4de0 83c101 894de0 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   83c428               | add                 esp, 0x28
            //   c745e000000000       | mov                 dword ptr [ebp - 0x20], 0
            //   eb09                 | jmp                 0xb
            //   8b4de0               | mov                 ecx, dword ptr [ebp - 0x20]
            //   83c101               | add                 ecx, 1
            //   894de0               | mov                 dword ptr [ebp - 0x20], ecx

        $sequence_9 = { eb22 8b55fc 8b450c 3b4204 7e09 8b4dfc 8b550c }
            // n = 7, score = 200
            //   eb22                 | jmp                 0x24
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   3b4204               | cmp                 eax, dword ptr [edx + 4]
            //   7e09                 | jle                 0xb
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]

    condition:
        7 of them and filesize < 3743744
}