rule win_juicy_potato_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-12-06"
        version = "1"
        description = "Detects win.juicy_potato."
        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.juicy_potato"
        malpedia_rule_date = "20231130"
        malpedia_hash = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351"
        malpedia_version = "20230808"
        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 = { 488b5010 498b4910 48ffc9 488bc2 48d1e8 4823c8 }
            // n = 6, score = 100
            //   488b5010             | dec                 eax
            //   498b4910             | mov                 dword ptr [ecx], eax
            //   48ffc9               | test                dl, 1
            //   488bc2               | je                  0xf0
            //   48d1e8               | dec                 eax
            //   4823c8               | sub                 esp, 0x20

        $sequence_1 = { 4053 4883ec20 488bd9 488bc2 488d0dade40100 48890b 488d5308 }
            // n = 7, score = 100
            //   4053                 | mov                 dword ptr [esp + 0x20], ebx
            //   4883ec20             | lea                 ecx, [edi + 1]
            //   488bd9               | mov                 dword ptr [esp + 0x28], 0x22
            //   488bc2               | mov                 dword ptr [esp + 0x20], 0x12
            //   488d0dade40100       | movsd               qword ptr [esp + 0x78], xmm1
            //   48890b               | dec                 eax
            //   488d5308             | lea                 ecx, [0xad64]

        $sequence_2 = { 488d5e08 488b03 6683382d 0f8598010000 0fb74002 83c09f }
            // n = 6, score = 100
            //   488d5e08             | dec                 eax
            //   488b03               | lea                 edx, [ebx + 8]
            //   6683382d             | xor                 ecx, ecx
            //   0f8598010000         | dec                 eax
            //   0fb74002             | mov                 ebx, ecx
            //   83c09f               | dec                 eax

        $sequence_3 = { 4889450f 4883c8ff 488955ff 488bc8 }
            // n = 4, score = 100
            //   4889450f             | dec                 eax
            //   4883c8ff             | add                 esp, 0x48
            //   488955ff             | ret                 
            //   488bc8               | dec                 eax

        $sequence_4 = { 488bd7 4c8d05dec60300 83e23f 488bcf 48c1f906 48c1e206 498b0cc8 }
            // n = 7, score = 100
            //   488bd7               | lea                 eax, [0x27fab]
            //   4c8d05dec60300       | dec                 eax
            //   83e23f               | mov                 dword ptr [ecx], eax
            //   488bcf               | dec                 eax
            //   48c1f906             | mov                 eax, ecx
            //   48c1e206             | ret                 
            //   498b0cc8             | xor                 eax, eax

        $sequence_5 = { 48894728 4883f8ff 7437 448b4310 488b5320 488bc8 ff15???????? }
            // n = 7, score = 100
            //   48894728             | add                 esp, 0x20
            //   4883f8ff             | pop                 edi
            //   7437                 | ret                 
            //   448b4310             | inc                 eax
            //   488b5320             | push                ebx
            //   488bc8               | dec                 eax
            //   ff15????????         |                     

        $sequence_6 = { e8???????? ff15???????? b801000000 e9???????? 488b5c2438 4885db 7470 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   ff15????????         |                     
            //   b801000000           | dec                 eax
            //   e9????????           |                     
            //   488b5c2438           | mov                 edi, edx
            //   4885db               | dec                 eax
            //   7470                 | mov                 esi, ecx

        $sequence_7 = { 488d15159c0100 ff15???????? 4885c0 0f8429030000 488bc8 e8???????? 488bcb }
            // n = 7, score = 100
            //   488d15159c0100       | mov                 dword ptr [esp + 0x18], esi
            //   ff15????????         |                     
            //   4885c0               | push                edi
            //   0f8429030000         | dec                 eax
            //   488bc8               | sub                 esp, 0x40
            //   e8????????           |                     
            //   488bcb               | mov                 ebp, ecx

        $sequence_8 = { 7509 488d056f200400 eb04 4883c024 8938 e8???????? 488d1d57200400 }
            // n = 7, score = 100
            //   7509                 | dec                 eax
            //   488d056f200400       | lea                 edx, [ebx + 8]
            //   eb04                 | xor                 ecx, ecx
            //   4883c024             | dec                 eax
            //   8938                 | mov                 dword ptr [edx], ecx
            //   e8????????           |                     
            //   488d1d57200400       | dec                 eax

        $sequence_9 = { ff15???????? ba10000000 663bc2 7312 488bd3 488d0d6df80200 ff15???????? }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   ba10000000           | sub                 esp, 0x20
            //   663bc2               | mov                 ebx, ecx
            //   7312                 | dec                 esp
            //   488bd3               | lea                 ecx, [0x30a09]
            //   488d0d6df80200       | mov                 ecx, 6
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 736256
}

rule win_juicy_potato_w0 {
    meta:
        author = "SpiderLabs"
        source = "https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/copy-paste-threat-actor-in-the-asia-pacific-region/"
        group = "copy_paste"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.juicy_potato"
        malpedia_version = "20200624"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:
        $str1 = "JuicyPotato" nocase wide ascii
        $str2 = "4991d34b-80a1-4291-83b6-3328366b9097" nocase wide ascii
        $str3 = "JuicyPotato.pdb" nocase wide ascii
        $str4 = "Waiting for auth" nocase wide ascii
    condition:        
        (uint16(0) == 0x5A4D) and 3 of ($str*) and filesize < 500KB
}

rule win_juicy_potato_w1 {
    meta:
        author = "SpiderLabs"
        source = "https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/copy-paste-threat-actor-in-the-asia-pacific-region/"
        group = "copy_paste"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.juicy_potato"
        malpedia_version = "20200624"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:
        $str1 = "Potato.dll" nocase wide ascii
        $str2 = "VirusDeleted" nocase wide ascii
        $str3 = "Page404r" nocase wide ascii
    condition:        
        (uint16(0) == 0x5A4D) and all of them and filesize < 200KB
}