rule win_hopeless_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.hopeless."
        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.hopeless"
        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 = { 41f7c3fdffffff 0f84a1040000 410fb74202 4531f6 4989f2 }
            // n = 5, score = 300
            //   41f7c3fdffffff       | mov                 ebx, 2
            //   0f84a1040000         | dec                 esp
            //   410fb74202           | mov                 esi, ebp
            //   4531f6               | inc                 ecx
            //   4989f2               | mov                 edx, 4

        $sequence_1 = { e8???????? 4989c4 4885c0 7450 4585f6 }
            // n = 5, score = 300
            //   e8????????           |                     
            //   4989c4               | mov                 ecx, edi
            //   4885c0               | dec                 eax
            //   7450                 | mov                 eax, dword ptr [esp + 0x40]
            //   4585f6               | inc                 ebp

        $sequence_2 = { 4489e0 2500060000 3d00020000 0f852afbffff 418d56ff 83fa0e 0f8e24020000 }
            // n = 7, score = 300
            //   4489e0               | lea                 eax, [0x107ff]
            //   2500060000           | dec                 eax
            //   3d00020000           | lea                 ecx, [esp + 0x6a0]
            //   0f852afbffff         | dec                 eax
            //   418d56ff             | mov                 edx, esi
            //   83fa0e               | dec                 eax
            //   0f8e24020000         | mov                 ecx, edi

        $sequence_3 = { 4c01c8 0f8939030000 b90f000000 48c1e803 }
            // n = 4, score = 300
            //   4c01c8               | test                eax, eax
            //   0f8939030000         | dec                 eax
            //   b90f000000           | lea                 edx, [esp + 0x70]
            //   48c1e803             | dec                 eax

        $sequence_4 = { 488b4c2430 31d2 48c744242800000000 41b910000000 }
            // n = 4, score = 300
            //   488b4c2430           | mov                 ebp, 3
            //   31d2                 | nop                 dword ptr [eax]
            //   48c744242800000000     | sub    eax, 0x30
            //   41b910000000         | dec                 eax

        $sequence_5 = { 807e0232 0f847e090000 488d5602 b933000000 }
            // n = 4, score = 300
            //   807e0232             | lea                 eax, [esp + 0x70]
            //   0f847e090000         | mov                 edx, 1
            //   488d5602             | dec                 eax
            //   b933000000           | add                 ebp, 8

        $sequence_6 = { 0f86e1010000 8b4500 488d4c2460 4c8d442470 }
            // n = 4, score = 300
            //   0f86e1010000         | je                  0x3ac
            //   8b4500               | inc                 esp
            //   488d4c2460           | cmp                 edi, eax
            //   4c8d442470           | jl                  0x364

        $sequence_7 = { 4881ec40020000 41b804010000 31c9 488d742430 }
            // n = 4, score = 300
            //   4881ec40020000       | mov                 edx, ebx
            //   41b804010000         | dec                 ecx
            //   31c9                 | shr                 eax, 0x20
            //   488d742430           | inc                 edi

        $sequence_8 = { 4181e4fff7ffff 4889fe 4489e9 44896308 4585ed 0f8faa020000 0f84fc050000 }
            // n = 7, score = 300
            //   4181e4fff7ffff       | dec                 eax
            //   4889fe               | mov                 dword ptr [esp + 0x50], ebx
            //   4489e9               | dec                 esp
            //   44896308             | lea                 eax, [0x106e4]
            //   4585ed               | mov                 eax, edx
            //   0f8faa020000         | mov                 ecx, 9
            //   0f84fc050000         | dec                 esp

        $sequence_9 = { 7415 418b06 85c0 0f881c080000 8d0480 8d4441d0 }
            // n = 6, score = 300
            //   7415                 | test                eax, eax
            //   418b06               | sete                al
            //   85c0                 | dec                 ecx
            //   0f881c080000         | add                 ebp, 8
            //   8d0480               | dec                 eax
            //   8d4441d0             | lea                 edx, [0xfb79]

    condition:
        7 of them and filesize < 247808
}

rule win_hopeless_w0 {
    meta:
        author = "MCRIT YARA Generator"
        description = "Code-based YARA rule composed from potentially unique basic blocks for the selected set of samples/family."
        date = "2026-07-24"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.hopeless"
        malpedia_version = "20260724"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:CLEAR"

    strings:
        // Rule generation selected 10 picblocks, covering 4/4 input sample(s).
        /* picblockhash: 0x88b500d009dc79ba - coverage: 4/4 samples.
         * 4889da             | mov rdx, rbx
         * 4c8d442470         | lea r8, [rsp + 0x70]
         * 4889f1             | mov rcx, rsi
         * 48c744247cffffffff | mov qword ptr [rsp + 0x7c], 0xffffffffffffffff
         * 4829f2             | sub rdx, rsi
         * 48d1fa             | sar rdx, 1
         * 83ea01             | sub edx, 1
         * e85ee2ffff         | call 0x14000a820
         * e979ffffff         | jmp 0x14000c540
         */
        $blockhash_0x88b500d009dc79ba = {
            4889da 4c8d442470 4889f1 48c744247cffffffff 4829f2 48d1fa 83ea01 e8????????
            e9????????
        }

        /* picblockhash: 0x3a78054a9fdd7ab2 - coverage: 4/4 samples.
         * 410fb74202             | movzx eax, word ptr [r10 + 2]
         * 4889d5                 | mov rbp, rdx
         * 4989f2                 | mov r10, rsi
         * 4531f6                 | xor r14d, r14d
         * c7842480000000ffffffff | mov dword ptr [rsp + 0x80], 0xffffffff
         * 41bb02000000           | mov r11d, 2
         * e9daf6ffff             | jmp 0x14000c6c0
         */
        $blockhash_0x3a78054a9fdd7ab2 = {
            410fb74202 4889d5 4989f2 4531f6 c7842480000000ffffffff 41bb02000000 e9????????
        }

        /* picblockhash: 0x928307e7ba100cae - coverage: 4/4 samples.
         * 660f10c8         | movupd xmm1, xmm0
         * f20f58c8         | addsd xmm1, xmm0
         * f20f580d8f880000 | addsd xmm1, qword ptr [rip + 0x888f]
         * 66480f7ec8       | movq rax, xmm1
         * 660f7eca         | movd edx, xmm1
         * 48c1e820         | shr rax, 0x20
         * 2d00004003       | sub eax, 0x3400000
         * 48c1e020         | shl rax, 0x20
         * 4809c2           | or rdx, rax
         * 4989d1           | mov r9, rdx
         */
        $blockhash_0x928307e7ba100cae = {
            660f10c8 f20f58c8 f20f580d???????? 66480f7ec8 660f7eca 48c1e820 2d00004003
            48c1e020 4809c2 4989d1
        }

        /* picblockhash: 0x7c179c3c1574d786 - coverage: 4/4 samples.
         * 53           | push rbx
         * 4883ec40     | sub rsp, 0x40
         * 418b01       | mov eax, dword ptr [r9]
         * 4889cb       | mov rbx, rcx
         * 4989d2       | mov r10, rdx
         * 4d89cb       | mov r11, r9
         * 4885d2       | test rdx, rdx
         * 0f84c6000000 | je 0x140010320
         */
        $blockhash_0x7c179c3c1574d786 = {
            53 4883ec40 418b01 4889cb 4989d2 4d89cb 4885d2 0f84????????
        }

        /* picblockhash: 0x9937bff6148cba11 - coverage: 4/4 samples.
         * 8b542470   | mov edx, dword ptr [rsp + 0x70]
         * 31c9       | xor ecx, ecx
         * 4c895c2468 | mov qword ptr [rsp + 0x68], r11
         * e8a1010000 | call 0x140010540
         * 4c8b5c2468 | mov r11, qword ptr [rsp + 0x68]
         * 85c0       | test eax, eax
         * 7460       | je 0x140010408
         */
        $blockhash_0x9937bff6148cba11 = {
            8b542470 31c9 4c895c2468 e8???????? 4c8b5c2468 85c0 74??
        }

        /* picblockhash: 0x141dd6e7ca40ba6c - coverage: 4/4 samples.
         * 31d2     | xor edx, edx
         * 84c0     | test al, al
         * 0f95c2   | setne dl
         * 4889d0   | mov rax, rdx
         * 4883c440 | add rsp, 0x40
         * 5b       | pop rbx
         * c3       | ret 
         */
        $blockhash_0x141dd6e7ca40ba6c = {
            31d2 84c0 0f95c2 4889d0 4883c440 5b c3
        }

        /* picblockhash: 0xe227a1f4d377216c - coverage: 4/4 samples.
         * 4889542458 | mov qword ptr [rsp + 0x58], rdx
         * 8b542470   | mov edx, dword ptr [rsp + 0x70]
         * 4c894c2468 | mov qword ptr [rsp + 0x68], r9
         * 4c89442460 | mov qword ptr [rsp + 0x60], r8
         * e8b8000000 | call 0x140010540
         * 4c8b542458 | mov r10, qword ptr [rsp + 0x58]
         * 4c8b5c2468 | mov r11, qword ptr [rsp + 0x68]
         * 85c0       | test eax, eax
         * 410fb602   | movzx eax, byte ptr [r10]
         * 7439       | je 0x1400104d3
         */
        $blockhash_0xe227a1f4d377216c = {
            4889542458 8b542470 4c894c2468 4c89442460 e8???????? 4c8b542458 4c8b5c2468 85c0
            410fb602 74??
        }

        /* picblockhash: 0x6dbb05f1b858bd17 - coverage: 4/4 samples.
         * 53           | push rbx
         * 4883ec40     | sub rsp, 0x40
         * 89d3         | mov ebx, edx
         * 488d542420   | lea rdx, [rsp + 0x20]
         * ff1516b20000 | call qword ptr [rip + 0xb216]
         * 85c0         | test eax, eax
         * 7409         | je 0x1400104ff
         */
        $blockhash_0x6dbb05f1b858bd17 = {
            53 4883ec40 89d3 488d542420 ff15???????? 85c0 74??
        }

        /* picblockhash: 0xd65fcc41d6a2fa93 - coverage: 4/4 samples.
         * 894c2428       | mov dword ptr [rsp + 0x28], ecx
         * 488d0dcd620000 | lea rcx, [rip + 0x62cd]
         * 8954242c       | mov dword ptr [rsp + 0x2c], edx
         * ff15cbb10000   | call qword ptr [rip + 0xb1cb]
         * 448b442428     | mov r8d, dword ptr [rsp + 0x28]
         * 448b4c242c     | mov r9d, dword ptr [rsp + 0x2c]
         * 4885c0         | test rax, rax
         * 744c           | je 0x1400105d8
         */
        $blockhash_0xd65fcc41d6a2fa93 = {
            894c2428 488d0d???????? 8954242c ff15???????? 448b442428 448b4c242c 4885c0 74??
        }

        /* picblockhash: 0xa61f37185de3c04 - coverage: 4/4 samples.
         * 44894c242c     | mov dword ptr [rsp + 0x2c], r9d
         * 488d15b5620000 | lea rdx, [rip + 0x62b5]
         * 4889c1         | mov rcx, rax
         * 4489442428     | mov dword ptr [rsp + 0x28], r8d
         * ff15b2b10000   | call qword ptr [rip + 0xb1b2]
         * 448b442428     | mov r8d, dword ptr [rsp + 0x28]
         * 448b4c242c     | mov r9d, dword ptr [rsp + 0x2c]
         * 4885c0         | test rax, rax
         * 7423           | je 0x1400105d8
         */
        $blockhash_0xa61f37185de3c04 = {
            44894c242c 488d15???????? 4889c1 4489442428 ff15???????? 448b442428 448b4c242c
            4885c0 74??
        }

    condition:
        7 of them
}