rule win_explosive_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.explosive_rat."
        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.explosive_rat"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 83ec2c 53 56 57 8965f0 c745fc00000000 8d45c8 }
            // n = 7, score = 100
            //   83ec2c               | sub                 esp, 0x2c
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   8965f0               | mov                 dword ptr [ebp - 0x10], esp
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   8d45c8               | lea                 eax, [ebp - 0x38]

        $sequence_1 = { 5b 7210 8b942400010000 52 e8???????? 83c404 8b8c24b8010000 }
            // n = 7, score = 100
            //   5b                   | pop                 ebx
            //   7210                 | jb                  0x12
            //   8b942400010000       | mov                 edx, dword ptr [esp + 0x100]
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8b8c24b8010000       | mov                 ecx, dword ptr [esp + 0x1b8]

        $sequence_2 = { 8b460c 50 ff15???????? 895e0c b800030000 5b c3 }
            // n = 7, score = 100
            //   8b460c               | mov                 eax, dword ptr [esi + 0xc]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   895e0c               | mov                 dword ptr [esi + 0xc], ebx
            //   b800030000           | mov                 eax, 0x300
            //   5b                   | pop                 ebx
            //   c3                   | ret                 

        $sequence_3 = { 832600 c6460401 5e c3 8b4120 833800 7416 }
            // n = 7, score = 100
            //   832600               | and                 dword ptr [esi], 0
            //   c6460401             | mov                 byte ptr [esi + 4], 1
            //   5e                   | pop                 esi
            //   c3                   | ret                 
            //   8b4120               | mov                 eax, dword ptr [ecx + 0x20]
            //   833800               | cmp                 dword ptr [eax], 0
            //   7416                 | je                  0x18

        $sequence_4 = { 8b74240c 8b4374 8b5378 03c6 894374 8bc6 8bcf }
            // n = 7, score = 100
            //   8b74240c             | mov                 esi, dword ptr [esp + 0xc]
            //   8b4374               | mov                 eax, dword ptr [ebx + 0x74]
            //   8b5378               | mov                 edx, dword ptr [ebx + 0x78]
            //   03c6                 | add                 eax, esi
            //   894374               | mov                 dword ptr [ebx + 0x74], eax
            //   8bc6                 | mov                 eax, esi
            //   8bcf                 | mov                 ecx, edi

        $sequence_5 = { 0f857afeffff 393cb560e64500 742e a1???????? 8d70ff }
            // n = 5, score = 100
            //   0f857afeffff         | jne                 0xfffffe80
            //   393cb560e64500       | cmp                 dword ptr [esi*4 + 0x45e660], edi
            //   742e                 | je                  0x30
            //   a1????????           |                     
            //   8d70ff               | lea                 esi, [eax - 1]

        $sequence_6 = { 8b5728 51 52 ff5724 83c408 8b4628 894634 }
            // n = 7, score = 100
            //   8b5728               | mov                 edx, dword ptr [edi + 0x28]
            //   51                   | push                ecx
            //   52                   | push                edx
            //   ff5724               | call                dword ptr [edi + 0x24]
            //   83c408               | add                 esp, 8
            //   8b4628               | mov                 eax, dword ptr [esi + 0x28]
            //   894634               | mov                 dword ptr [esi + 0x34], eax

        $sequence_7 = { 68???????? e8???????? 83c404 b9???????? e8???????? 8d8590fdffff 50 }
            // n = 7, score = 100
            //   68????????           |                     
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   b9????????           |                     
            //   e8????????           |                     
            //   8d8590fdffff         | lea                 eax, [ebp - 0x270]
            //   50                   | push                eax

        $sequence_8 = { 7964 a802 7560 33ff 397e08 7507 56 }
            // n = 7, score = 100
            //   7964                 | jns                 0x66
            //   a802                 | test                al, 2
            //   7560                 | jne                 0x62
            //   33ff                 | xor                 edi, edi
            //   397e08               | cmp                 dword ptr [esi + 8], edi
            //   7507                 | jne                 9
            //   56                   | push                esi

        $sequence_9 = { 8b0d???????? 51 ff15???????? 8bf0 8975c0 33c0 3bf0 }
            // n = 7, score = 100
            //   8b0d????????         |                     
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   8975c0               | mov                 dword ptr [ebp - 0x40], esi
            //   33c0                 | xor                 eax, eax
            //   3bf0                 | cmp                 esi, eax

    condition:
        7 of them and filesize < 855040
}