rule win_carberp_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.carberp."
        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.carberp"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { ff7510 8d4e1c ff750c e8???????? ff7510 8d4e24 ff750c }
            // n = 7, score = 200
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   8d4e1c               | lea                 ecx, [esi + 0x1c]
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   e8????????           |                     
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   8d4e24               | lea                 ecx, [esi + 0x24]
            //   ff750c               | push                dword ptr [ebp + 0xc]

        $sequence_1 = { 0fb601 50 e8???????? 83c404 84c0 740b 8819 }
            // n = 7, score = 200
            //   0fb601               | movzx               eax, byte ptr [ecx]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   84c0                 | test                al, al
            //   740b                 | je                  0xd
            //   8819                 | mov                 byte ptr [ecx], bl

        $sequence_2 = { 85f6 7454 833d????????00 744b 6a13 6a00 68???????? }
            // n = 7, score = 200
            //   85f6                 | test                esi, esi
            //   7454                 | je                  0x56
            //   833d????????00       |                     
            //   744b                 | je                  0x4d
            //   6a13                 | push                0x13
            //   6a00                 | push                0
            //   68????????           |                     

        $sequence_3 = { 8b4614 83e804 7438 48 741c 48 7552 }
            // n = 7, score = 200
            //   8b4614               | mov                 eax, dword ptr [esi + 0x14]
            //   83e804               | sub                 eax, 4
            //   7438                 | je                  0x3a
            //   48                   | dec                 eax
            //   741c                 | je                  0x1e
            //   48                   | dec                 eax
            //   7552                 | jne                 0x54

        $sequence_4 = { 8a5c3e08 5d 57 e8???????? 59 5e ff742408 }
            // n = 7, score = 200
            //   8a5c3e08             | mov                 bl, byte ptr [esi + edi + 8]
            //   5d                   | pop                 ebp
            //   57                   | push                edi
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   5e                   | pop                 esi
            //   ff742408             | push                dword ptr [esp + 8]

        $sequence_5 = { 59 59 8bf8 57 e8???????? 55 55 }
            // n = 7, score = 200
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   8bf8                 | mov                 edi, eax
            //   57                   | push                edi
            //   e8????????           |                     
            //   55                   | push                ebp
            //   55                   | push                ebp

        $sequence_6 = { ff7508 e8???????? 83c42c 84c0 741c ff750c 56 }
            // n = 7, score = 200
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   83c42c               | add                 esp, 0x2c
            //   84c0                 | test                al, al
            //   741c                 | je                  0x1e
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   56                   | push                esi

        $sequence_7 = { eb08 51 57 56 e8???????? 83c40c 57 }
            // n = 7, score = 200
            //   eb08                 | jmp                 0xa
            //   51                   | push                ecx
            //   57                   | push                edi
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   57                   | push                edi

        $sequence_8 = { 3bc7 7525 8b550c 52 e8???????? 83c404 b801000000 }
            // n = 7, score = 200
            //   3bc7                 | cmp                 eax, edi
            //   7525                 | jne                 0x27
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   b801000000           | mov                 eax, 1

        $sequence_9 = { 57 53 e8???????? 59 84c0 0f8551010000 }
            // n = 6, score = 200
            //   57                   | push                edi
            //   53                   | push                ebx
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   84c0                 | test                al, al
            //   0f8551010000         | jne                 0x157

    condition:
        7 of them and filesize < 491520
}