rule win_jripbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "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 = { 8bf8 85ff 0f85c8000000 33f6 46 8975e8 8975f4 }
            // n = 7, score = 100
            //   8bf8                 | mov                 edi, eax
            //   85ff                 | test                edi, edi
            //   0f85c8000000         | jne                 0xce
            //   33f6                 | xor                 esi, esi
            //   46                   | inc                 esi
            //   8975e8               | mov                 dword ptr [ebp - 0x18], esi
            //   8975f4               | mov                 dword ptr [ebp - 0xc], esi

        $sequence_1 = { ffd3 8d85f0fdffff 83c414 8d4802 668b10 83c002 663bd7 }
            // n = 7, score = 100
            //   ffd3                 | call                ebx
            //   8d85f0fdffff         | lea                 eax, [ebp - 0x210]
            //   83c414               | add                 esp, 0x14
            //   8d4802               | lea                 ecx, [eax + 2]
            //   668b10               | mov                 dx, word ptr [eax]
            //   83c002               | add                 eax, 2
            //   663bd7               | cmp                 dx, di

        $sequence_2 = { b88086ffff 5f 5e 5b c9 c3 55 }
            // n = 7, score = 100
            //   b88086ffff           | mov                 eax, 0xffff8680
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   c9                   | leave               
            //   c3                   | ret                 
            //   55                   | push                ebp

        $sequence_3 = { 6a10 50 53 ff74243c }
            // n = 4, score = 100
            //   6a10                 | push                0x10
            //   50                   | push                eax
            //   53                   | push                ebx
            //   ff74243c             | push                dword ptr [esp + 0x3c]

        $sequence_4 = { a1???????? 83c40c 85c0 743b 50 be???????? e8???????? }
            // n = 7, score = 100
            //   a1????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   743b                 | je                  0x3d
            //   50                   | push                eax
            //   be????????           |                     
            //   e8????????           |                     

        $sequence_5 = { 753a 57 ff15???????? 8d85f0fdffff 50 ff15???????? ffb5d0fbffff }
            // n = 7, score = 100
            //   753a                 | jne                 0x3c
            //   57                   | push                edi
            //   ff15????????         |                     
            //   8d85f0fdffff         | lea                 eax, [ebp - 0x210]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   ffb5d0fbffff         | push                dword ptr [ebp - 0x430]

        $sequence_6 = { 83c002 663bcb 75f5 2bc6 d1f8 8d0c00 8b85e0fbffff }
            // n = 7, score = 100
            //   83c002               | add                 eax, 2
            //   663bcb               | cmp                 cx, bx
            //   75f5                 | jne                 0xfffffff7
            //   2bc6                 | sub                 eax, esi
            //   d1f8                 | sar                 eax, 1
            //   8d0c00               | lea                 ecx, [eax + eax]
            //   8b85e0fbffff         | mov                 eax, dword ptr [ebp - 0x420]

        $sequence_7 = { 8bec 51 53 33db 3bf3 0f8496000000 8b4e10 }
            // n = 7, score = 100
            //   8bec                 | mov                 ebp, esp
            //   51                   | push                ecx
            //   53                   | push                ebx
            //   33db                 | xor                 ebx, ebx
            //   3bf3                 | cmp                 esi, ebx
            //   0f8496000000         | je                  0x9c
            //   8b4e10               | mov                 ecx, dword ptr [esi + 0x10]

        $sequence_8 = { 1bc0 83d8ff 3bc7 7415 53 }
            // n = 5, score = 100
            //   1bc0                 | sbb                 eax, eax
            //   83d8ff               | sbb                 eax, -1
            //   3bc7                 | cmp                 eax, edi
            //   7415                 | je                  0x17
            //   53                   | push                ebx

        $sequence_9 = { 3b4804 7407 b880bfffff 5d c3 ff751c 8b5518 }
            // n = 7, score = 100
            //   3b4804               | cmp                 ecx, dword ptr [eax + 4]
            //   7407                 | je                  9
            //   b880bfffff           | mov                 eax, 0xffffbf80
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   ff751c               | push                dword ptr [ebp + 0x1c]
            //   8b5518               | mov                 edx, dword ptr [ebp + 0x18]

    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
}