rule win_agendacrypt_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.agendacrypt."
        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.agendacrypt"
        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???????? 5e 5f 5b 5d c3 6a04 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   5e                   | pop                 esi
            //   5f                   | pop                 edi
            //   5b                   | pop                 ebx
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   6a04                 | push                4

        $sequence_1 = { c745dc00000000 c745f000000000 e9???????? 0fb64103 8b5dd8 3c2f 0f45f0 }
            // n = 7, score = 100
            //   c745dc00000000       | mov                 dword ptr [ebp - 0x24], 0
            //   c745f000000000       | mov                 dword ptr [ebp - 0x10], 0
            //   e9????????           |                     
            //   0fb64103             | movzx               eax, byte ptr [ecx + 3]
            //   8b5dd8               | mov                 ebx, dword ptr [ebp - 0x28]
            //   3c2f                 | cmp                 al, 0x2f
            //   0f45f0               | cmovne              esi, eax

        $sequence_2 = { eb24 83c202 39d9 be02000000 0f45ca 662e0f1f840000000000 90 }
            // n = 7, score = 100
            //   eb24                 | jmp                 0x26
            //   83c202               | add                 edx, 2
            //   39d9                 | cmp                 ecx, ebx
            //   be02000000           | mov                 esi, 2
            //   0f45ca               | cmovne              ecx, edx
            //   662e0f1f840000000000     | nop    word ptr cs:[eax + eax]
            //   90                   | nop                 

        $sequence_3 = { 8d4e24 e8???????? 83feff 7415 f0ff4e04 750f a1???????? }
            // n = 7, score = 100
            //   8d4e24               | lea                 ecx, [esi + 0x24]
            //   e8????????           |                     
            //   83feff               | cmp                 esi, -1
            //   7415                 | je                  0x17
            //   f0ff4e04             | lock dec            dword ptr [esi + 4]
            //   750f                 | jne                 0x11
            //   a1????????           |                     

        $sequence_4 = { b8???????? e9???????? 31f6 31db 837c240404 77a2 83042408 }
            // n = 7, score = 100
            //   b8????????           |                     
            //   e9????????           |                     
            //   31f6                 | xor                 esi, esi
            //   31db                 | xor                 ebx, ebx
            //   837c240404           | cmp                 dword ptr [esp + 4], 4
            //   77a2                 | ja                  0xffffffa4
            //   83042408             | add                 dword ptr [esp], 8

        $sequence_5 = { eb06 8b75e4 8b4dd0 f20f1045c0 89d0 42 894dd0 }
            // n = 7, score = 100
            //   eb06                 | jmp                 8
            //   8b75e4               | mov                 esi, dword ptr [ebp - 0x1c]
            //   8b4dd0               | mov                 ecx, dword ptr [ebp - 0x30]
            //   f20f1045c0           | movsd               xmm0, qword ptr [ebp - 0x40]
            //   89d0                 | mov                 eax, edx
            //   42                   | inc                 edx
            //   894dd0               | mov                 dword ptr [ebp - 0x30], ecx

        $sequence_6 = { e9???????? 8b7508 83e3fc baabaaaaaa 897dc8 894de8 8d041e }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   83e3fc               | and                 ebx, 0xfffffffc
            //   baabaaaaaa           | mov                 edx, 0xaaaaaaab
            //   897dc8               | mov                 dword ptr [ebp - 0x38], edi
            //   894de8               | mov                 dword ptr [ebp - 0x18], ecx
            //   8d041e               | lea                 eax, [esi + ebx]

        $sequence_7 = { c1c110 018d24ffffff 894dec 8b8d28ffffff 3145a0 8b45e0 c145a010 }
            // n = 7, score = 100
            //   c1c110               | rol                 ecx, 0x10
            //   018d24ffffff         | add                 dword ptr [ebp - 0xdc], ecx
            //   894dec               | mov                 dword ptr [ebp - 0x14], ecx
            //   8b8d28ffffff         | mov                 ecx, dword ptr [ebp - 0xd8]
            //   3145a0               | xor                 dword ptr [ebp - 0x60], eax
            //   8b45e0               | mov                 eax, dword ptr [ebp - 0x20]
            //   c145a010             | rol                 dword ptr [ebp - 0x60], 0x10

        $sequence_8 = { 8d542468 8d8c24f0030000 6a00 e8???????? 83c404 8b8424f0030000 83f802 }
            // n = 7, score = 100
            //   8d542468             | lea                 edx, [esp + 0x68]
            //   8d8c24f0030000       | lea                 ecx, [esp + 0x3f0]
            //   6a00                 | push                0
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8b8424f0030000       | mov                 eax, dword ptr [esp + 0x3f0]
            //   83f802               | cmp                 eax, 2

        $sequence_9 = { ff742454 e8???????? 83c408 85c0 7408 39d6 7204 }
            // n = 7, score = 100
            //   ff742454             | push                dword ptr [esp + 0x54]
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax
            //   7408                 | je                  0xa
            //   39d6                 | cmp                 esi, edx
            //   7204                 | jb                  6

    condition:
        7 of them and filesize < 3340288
}