SYMBOLCOMMON_NAMEaka. SYNONYMS
win.mydogs (Back to overview)

MyDogs

Actor(s): Kimsuki


There is no description at this point.

References
2020-03-10Virus BulletinJaeki Kim, Kyoung-Ju Kwak (郭炅周), Min-Chang Jang
@online{kim:20200310:kimsuky:f634a21, author = {Jaeki Kim and Kyoung-Ju Kwak (郭炅周) and Min-Chang Jang}, title = {{Kimsuky group: tracking the king of the spear phishing}}, date = {2020-03-10}, organization = {Virus Bulletin}, url = {https://www.virusbulletin.com/virusbulletin/2020/03/vb2019-paper-kimsuky-group-tracking-king-spearphishing/}, language = {English}, urldate = {2020-09-23} } Kimsuky group: tracking the king of the spear phishing
Kimsuky MyDogs
2020-03-09PWC UKKris McConkey, Sveva Vittoria Scenarelli
@online{mcconkey:20200309:tracking:1979cbf, author = {Kris McConkey and Sveva Vittoria Scenarelli}, title = {{Tracking ‘Kimsuky’, the North Korea-based cyber espionage group: Part 1}}, date = {2020-03-09}, organization = {PWC UK}, url = {https://www.pwc.co.uk/issues/cyber-security-services/research/tracking-kimsuky-north-korea-based-cyber-espionage-group-part-1.html}, language = {English}, urldate = {2021-05-03} } Tracking ‘Kimsuky’, the North Korea-based cyber espionage group: Part 1
BabyShark MyDogs Kimsuky
2020-03-09PWC UKKris McConkey, Sveva Vittoria Scenarelli
@online{mcconkey:20200309:tracking:5a16ab4, author = {Kris McConkey and Sveva Vittoria Scenarelli}, title = {{Tracking ‘Kimsuky’, the North Korea-based cyber espionage group: Part 2}}, date = {2020-03-09}, organization = {PWC UK}, url = {https://www.pwc.co.uk/issues/cyber-security-data-privacy/research/tracking-kimsuky-north-korea-based-cyber-espionage-group-part-2.html}, language = {English}, urldate = {2020-07-13} } Tracking ‘Kimsuky’, the North Korea-based cyber espionage group: Part 2
BabyShark MyDogs Kimsuky
Yara Rules
[TLP:WHITE] win_mydogs_auto (20220516 | Detects win.mydogs.)
rule win_mydogs_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.mydogs."
        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.mydogs"
        malpedia_rule_date = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { 8d450b 50 8bcf e8???????? 0fb64634 88450b }
            // n = 6, score = 200
            //   8d450b               | lea                 eax, [ebp + 0xb]
            //   50                   | push                eax
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     
            //   0fb64634             | movzx               eax, byte ptr [esi + 0x34]
            //   88450b               | mov                 byte ptr [ebp + 0xb], al

        $sequence_1 = { 8d8594fdffff 50 ff15???????? a1???????? 0f57c0 660fd645bd }
            // n = 6, score = 200
            //   8d8594fdffff         | lea                 eax, [ebp - 0x26c]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   a1????????           |                     
            //   0f57c0               | xorps               xmm0, xmm0
            //   660fd645bd           | movq                qword ptr [ebp - 0x43], xmm0

        $sequence_2 = { 8bcf c645ff50 e8???????? 6a01 8d45ff }
            // n = 5, score = 200
            //   8bcf                 | mov                 ecx, edi
            //   c645ff50             | mov                 byte ptr [ebp - 1], 0x50
            //   e8????????           |                     
            //   6a01                 | push                1
            //   8d45ff               | lea                 eax, [ebp - 1]

        $sequence_3 = { 8be5 5d c3 8b45b4 33f6 8bd0 83e201 }
            // n = 7, score = 200
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   8b45b4               | mov                 eax, dword ptr [ebp - 0x4c]
            //   33f6                 | xor                 esi, esi
            //   8bd0                 | mov                 edx, eax
            //   83e201               | and                 edx, 1

        $sequence_4 = { 895304 e8???????? 8b4db8 894308 8b45bc 6a00 81e900803ed5 }
            // n = 7, score = 200
            //   895304               | mov                 dword ptr [ebx + 4], edx
            //   e8????????           |                     
            //   8b4db8               | mov                 ecx, dword ptr [ebp - 0x48]
            //   894308               | mov                 dword ptr [ebx + 8], eax
            //   8b45bc               | mov                 eax, dword ptr [ebp - 0x44]
            //   6a00                 | push                0
            //   81e900803ed5         | sub                 ecx, 0xd53e8000

        $sequence_5 = { 8bcf c645ff4b e8???????? 6a01 8d450b 50 8bcf }
            // n = 7, score = 200
            //   8bcf                 | mov                 ecx, edi
            //   c645ff4b             | mov                 byte ptr [ebp - 1], 0x4b
            //   e8????????           |                     
            //   6a01                 | push                1
            //   8d450b               | lea                 eax, [ebp + 0xb]
            //   50                   | push                eax
            //   8bcf                 | mov                 ecx, edi

        $sequence_6 = { 50 8d564c 8bcf e8???????? 83c40c 85c0 }
            // n = 6, score = 200
            //   50                   | push                eax
            //   8d564c               | lea                 edx, [esi + 0x4c]
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax

        $sequence_7 = { f6460c40 755e 56 e8???????? 59 8bc8 }
            // n = 6, score = 200
            //   f6460c40             | test                byte ptr [esi + 0xc], 0x40
            //   755e                 | jne                 0x60
            //   56                   | push                esi
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8bc8                 | mov                 ecx, eax

        $sequence_8 = { 8bf8 85ff 742b 6a00 6800000008 6a01 }
            // n = 6, score = 200
            //   8bf8                 | mov                 edi, eax
            //   85ff                 | test                edi, edi
            //   742b                 | je                  0x2d
            //   6a00                 | push                0
            //   6800000008           | push                0x8000000
            //   6a01                 | push                1

        $sequence_9 = { 740e 83f806 7409 83f805 0f857a030000 }
            // n = 5, score = 200
            //   740e                 | je                  0x10
            //   83f806               | cmp                 eax, 6
            //   7409                 | je                  0xb
            //   83f805               | cmp                 eax, 5
            //   0f857a030000         | jne                 0x380

    condition:
        7 of them and filesize < 313344
}
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