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 = {2020-03-11} } Kimsuky group: tracking the king of the spear phishing
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: Parts 1 and 2}}, 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.htmlhttps://www.pwc.co.uk/issues/cyber-security-data-privacy/research/tracking-kimsuky-north-korea-based-cyber-espionage-group-part-2.html}, language = {English}, urldate = {2020-07-11} } Tracking ‘Kimsuky’, the North Korea-based cyber espionage group: Parts 1 and 2
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 (20200529 | autogenerated rule brought to you by yara-signator)
rule win_mydogs_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-05-30"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mydogs"
        malpedia_rule_date = "20200529"
        malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8"
        malpedia_version = "20200529"
        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 / approach 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 = { 50 6a00 68???????? 8d8590fdffff 50 ffd6 68???????? }
            // n = 7, score = 200
            //   50                   | push                eax
            //   6a00                 | push                0
            //   68????????           |                     
            //   8d8590fdffff         | lea                 eax, [ebp - 0x270]
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   68????????           |                     

        $sequence_1 = { 83c40c 6808020000 e8???????? 83c404 8bf8 6808020000 e8???????? }
            // n = 7, score = 200
            //   83c40c               | add                 esp, 0xc
            //   6808020000           | push                0x208
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8bf8                 | mov                 edi, eax
            //   6808020000           | push                0x208
            //   e8????????           |                     

        $sequence_2 = { 33c0 8d6590 5f 5e 5b 8b4dfc 33cd }
            // n = 7, score = 200
            //   33c0                 | xor                 eax, eax
            //   8d6590               | lea                 esp, [ebp - 0x70]
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   33cd                 | xor                 ecx, ebp

        $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 = { 89530c e8???????? 894310 895314 8b5da8 85db 7458 }
            // n = 7, score = 200
            //   89530c               | mov                 dword ptr [ebx + 0xc], edx
            //   e8????????           |                     
            //   894310               | mov                 dword ptr [ebx + 0x10], eax
            //   895314               | mov                 dword ptr [ebx + 0x14], edx
            //   8b5da8               | mov                 ebx, dword ptr [ebp - 0x58]
            //   85db                 | test                ebx, ebx
            //   7458                 | je                  0x5a

        $sequence_5 = { 83c404 46 81fe00010000 0f8ccafdffff 0f84bafdffff 8b8c240c080000 }
            // n = 6, score = 200
            //   83c404               | add                 esp, 4
            //   46                   | inc                 esi
            //   81fe00010000         | cmp                 esi, 0x100
            //   0f8ccafdffff         | jl                  0xfffffdd0
            //   0f84bafdffff         | je                  0xfffffdc0
            //   8b8c240c080000       | mov                 ecx, dword ptr [esp + 0x80c]

        $sequence_6 = { 7567 56 6a01 8d45f8 6a04 50 e8???????? }
            // n = 7, score = 200
            //   7567                 | jne                 0x69
            //   56                   | push                esi
            //   6a01                 | push                1
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   6a04                 | push                4
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_7 = { ffd3 c6466c01 897e7c 33c0 5f 5e }
            // n = 6, score = 200
            //   ffd3                 | call                ebx
            //   c6466c01             | mov                 byte ptr [esi + 0x6c], 1
            //   897e7c               | mov                 dword ptr [esi + 0x7c], edi
            //   33c0                 | xor                 eax, eax
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi

        $sequence_8 = { 8b4b70 85c9 7810 8b8558fbffff 03c1 898578fbffff }
            // n = 6, score = 200
            //   8b4b70               | mov                 ecx, dword ptr [ebx + 0x70]
            //   85c9                 | test                ecx, ecx
            //   7810                 | js                  0x12
            //   8b8558fbffff         | mov                 eax, dword ptr [ebp - 0x4a8]
            //   03c1                 | add                 eax, ecx
            //   898578fbffff         | mov                 dword ptr [ebp - 0x488], eax

        $sequence_9 = { 85c0 750f 8d442430 50 ff74241c }
            // n = 5, score = 200
            //   85c0                 | test                eax, eax
            //   750f                 | jne                 0x11
            //   8d442430             | lea                 eax, [esp + 0x30]
            //   50                   | push                eax
            //   ff74241c             | push                dword ptr [esp + 0x1c]

    condition:
        7 of them and filesize < 313344
}
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