rule win_jripbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        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 = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 33c0 53 e8???????? 83c410 85c0 7434 ff75f8 }
            // n = 7, score = 100
            //   33c0                 | xor                 eax, eax
            //   53                   | push                ebx
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   85c0                 | test                eax, eax
            //   7434                 | je                  0x36
            //   ff75f8               | push                dword ptr [ebp - 8]

        $sequence_1 = { 8b5da4 c1eb0a 33c3 03c7 03856cffffff 8b7df4 8945ac }
            // n = 7, score = 100
            //   8b5da4               | mov                 ebx, dword ptr [ebp - 0x5c]
            //   c1eb0a               | shr                 ebx, 0xa
            //   33c3                 | xor                 eax, ebx
            //   03c7                 | add                 eax, edi
            //   03856cffffff         | add                 eax, dword ptr [ebp - 0x94]
            //   8b7df4               | mov                 edi, dword ptr [ebp - 0xc]
            //   8945ac               | mov                 dword ptr [ebp - 0x54], eax

        $sequence_2 = { 50 ff15???????? 8944243c 39742434 7412 ff742434 56 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8944243c             | mov                 dword ptr [esp + 0x3c], eax
            //   39742434             | cmp                 dword ptr [esp + 0x34], esi
            //   7412                 | je                  0x14
            //   ff742434             | push                dword ptr [esp + 0x34]
            //   56                   | push                esi

        $sequence_3 = { e8???????? 83c408 85c0 7536 8b07 894308 8b06 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax
            //   7536                 | jne                 0x38
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   894308               | mov                 dword ptr [ebx + 8], eax
            //   8b06                 | mov                 eax, dword ptr [esi]

        $sequence_4 = { 33c0 c3 b8808dffff c3 eb2d 8b86c4000000 8b8ec0000000 }
            // n = 7, score = 100
            //   33c0                 | xor                 eax, eax
            //   c3                   | ret                 
            //   b8808dffff           | mov                 eax, 0xffff8d80
            //   c3                   | ret                 
            //   eb2d                 | jmp                 0x2f
            //   8b86c4000000         | mov                 eax, dword ptr [esi + 0xc4]
            //   8b8ec0000000         | mov                 ecx, dword ptr [esi + 0xc0]

        $sequence_5 = { 6a30 8dbc24f4000000 f3a5 5f 57 8d8424d8010000 }
            // n = 6, score = 100
            //   6a30                 | push                0x30
            //   8dbc24f4000000       | lea                 edi, dword ptr [esp + 0xf4]
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   5f                   | pop                 edi
            //   57                   | push                edi
            //   8d8424d8010000       | lea                 eax, dword ptr [esp + 0x1d8]

        $sequence_6 = { 3308 83450c04 33d1 894820 8b4808 33ca 894828 }
            // n = 7, score = 100
            //   3308                 | xor                 ecx, dword ptr [eax]
            //   83450c04             | add                 dword ptr [ebp + 0xc], 4
            //   33d1                 | xor                 edx, ecx
            //   894820               | mov                 dword ptr [eax + 0x20], ecx
            //   8b4808               | mov                 ecx, dword ptr [eax + 8]
            //   33ca                 | xor                 ecx, edx
            //   894828               | mov                 dword ptr [eax + 0x28], ecx

        $sequence_7 = { 33711c 8975f8 8bd6 8b4510 8b4df0 8bd9 c1eb08 }
            // n = 7, score = 100
            //   33711c               | xor                 esi, dword ptr [ecx + 0x1c]
            //   8975f8               | mov                 dword ptr [ebp - 8], esi
            //   8bd6                 | mov                 edx, esi
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   8b4df0               | mov                 ecx, dword ptr [ebp - 0x10]
            //   8bd9                 | mov                 ebx, ecx
            //   c1eb08               | shr                 ebx, 8

        $sequence_8 = { 8bc2 c1e808 884702 8bc1 c1e818 884704 8bc1 }
            // n = 7, score = 100
            //   8bc2                 | mov                 eax, edx
            //   c1e808               | shr                 eax, 8
            //   884702               | mov                 byte ptr [edi + 2], al
            //   8bc1                 | mov                 eax, ecx
            //   c1e818               | shr                 eax, 0x18
            //   884704               | mov                 byte ptr [edi + 4], al
            //   8bc1                 | mov                 eax, ecx

        $sequence_9 = { 57 50 ffd6 50 ff15???????? ebde ff7508 }
            // n = 7, score = 100
            //   57                   | push                edi
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   50                   | push                eax
            //   ff15????????         |                     
            //   ebde                 | jmp                 0xffffffe0
            //   ff7508               | push                dword ptr [ebp + 8]

    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
}