rule win_jripbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.jripbot."
        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.jripbot"
        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 = { 66837dec01 7e02 8bc1 0fbf4df4 53 51 0fbf4df2 }
            // n = 7, score = 100
            //   66837dec01           | cmp                 word ptr [ebp - 0x14], 1
            //   7e02                 | jle                 4
            //   8bc1                 | mov                 eax, ecx
            //   0fbf4df4             | movsx               ecx, word ptr [ebp - 0xc]
            //   53                   | push                ebx
            //   51                   | push                ecx
            //   0fbf4df2             | movsx               ecx, word ptr [ebp - 0xe]

        $sequence_1 = { 8945fc 85c0 757c 8b5708 8b4e08 33ff 85db }
            // n = 7, score = 100
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   85c0                 | test                eax, eax
            //   757c                 | jne                 0x7e
            //   8b5708               | mov                 edx, dword ptr [edi + 8]
            //   8b4e08               | mov                 ecx, dword ptr [esi + 8]
            //   33ff                 | xor                 edi, edi
            //   85db                 | test                ebx, ebx

        $sequence_2 = { 740e 830eff 53 8bde 8bc6 e8???????? 59 }
            // n = 7, score = 100
            //   740e                 | je                  0x10
            //   830eff               | or                  dword ptr [esi], 0xffffffff
            //   53                   | push                ebx
            //   8bde                 | mov                 ebx, esi
            //   8bc6                 | mov                 eax, esi
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_3 = { e8???????? 83c40c 017e24 33c0 e9???????? 8b5d10 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   017e24               | add                 dword ptr [esi + 0x24], edi
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     
            //   8b5d10               | mov                 ebx, dword ptr [ebp + 0x10]

        $sequence_4 = { 8d442428 50 ff15???????? 85c0 7431 ff74241c 8b5c241c }
            // n = 7, score = 100
            //   8d442428             | lea                 eax, [esp + 0x28]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7431                 | je                  0x33
            //   ff74241c             | push                dword ptr [esp + 0x1c]
            //   8b5c241c             | mov                 ebx, dword ptr [esp + 0x1c]

        $sequence_5 = { 83f801 7e72 8b5f10 33f6 3bde 7429 3935???????? }
            // n = 7, score = 100
            //   83f801               | cmp                 eax, 1
            //   7e72                 | jle                 0x74
            //   8b5f10               | mov                 ebx, dword ptr [edi + 0x10]
            //   33f6                 | xor                 esi, esi
            //   3bde                 | cmp                 ebx, esi
            //   7429                 | je                  0x2b
            //   3935????????         |                     

        $sequence_6 = { ff7508 8945e4 ffd7 33f6 895de0 395d10 725e }
            // n = 7, score = 100
            //   ff7508               | push                dword ptr [ebp + 8]
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   ffd7                 | call                edi
            //   33f6                 | xor                 esi, esi
            //   895de0               | mov                 dword ptr [ebp - 0x20], ebx
            //   395d10               | cmp                 dword ptr [ebp + 0x10], ebx
            //   725e                 | jb                  0x60

        $sequence_7 = { 8b8eb8000000 8a10 885105 0138 33c0 5f }
            // n = 6, score = 100
            //   8b8eb8000000         | mov                 ecx, dword ptr [esi + 0xb8]
            //   8a10                 | mov                 dl, byte ptr [eax]
            //   885105               | mov                 byte ptr [ecx + 5], dl
            //   0138                 | add                 dword ptr [eax], edi
            //   33c0                 | xor                 eax, eax
            //   5f                   | pop                 edi

        $sequence_8 = { 59 ff742410 8d8424f4000000 53 6a01 50 ffd7 }
            // n = 7, score = 100
            //   59                   | pop                 ecx
            //   ff742410             | push                dword ptr [esp + 0x10]
            //   8d8424f4000000       | lea                 eax, [esp + 0xf4]
            //   53                   | push                ebx
            //   6a01                 | push                1
            //   50                   | push                eax
            //   ffd7                 | call                edi

        $sequence_9 = { ffd6 33f6 39742438 7418 ff742438 ff15???????? ff742438 }
            // n = 7, score = 100
            //   ffd6                 | call                esi
            //   33f6                 | xor                 esi, esi
            //   39742438             | cmp                 dword ptr [esp + 0x38], esi
            //   7418                 | je                  0x1a
            //   ff742438             | push                dword ptr [esp + 0x38]
            //   ff15????????         |                     
            //   ff742438             | push                dword ptr [esp + 0x38]

    condition:
        7 of them and filesize < 507904
}

rule win_jripbot_w0 {
	meta:
		author = "Florian Roth"
		reference = "https://securelist.com/blog/research/71275/wild-neutron-economic-espionage-threat-actor-returns-with-new-tricks/"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.jripbot"
        malpedia_version = "20180301"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
	strings:
		$s0 = "LiveUpdater.exe" fullword wide /* PEStudio Blacklist: strings */ /* score: '25.00' */
		$s1 = "id-at-postalAddress" fullword ascii /* PEStudio Blacklist: strings */ /* score: '18.00' */
		$s2 = "%d -> %d (default)" fullword wide /* PEStudio Blacklist: strings */ /* score: '17.00' */
		$s3 = "%s%s%s=%d,%s=%d,%s=%d," fullword wide /* score: '15.00' */
		$s8 = "id-ce-keyUsage" fullword ascii /* score: '12.00' */
		$s9 = "Key Usage" fullword ascii /* score: '12.00' */
		$s32 = "UPDATE_ID" fullword wide /* PEStudio Blacklist: strings */ /* score: '9.00' */
		$s37 = "id-at-commonName" fullword ascii /* score: '8.00' */
		$s38 = "2008R2" fullword wide /* PEStudio Blacklist: os */ /* score: '8.00' */
		$s39 = "RSA-alt" fullword ascii /* PEStudio Blacklist: strings */ /* score: '8.00' */
		$s40 = "%02d.%04d.%s" fullword wide /* score: '7.02' */
	condition:
		all of them
}