SYMBOLCOMMON_NAMEaka. SYNONYMS
win.mechanical (Back to overview)

MECHANICAL

aka: GoldStamp

Actor(s): Kimsuky


There is no description at this point.

References
2020-10-27US-CERTUS-CERT
@online{uscert:20201027:alert:cd5c1eb, author = {US-CERT}, title = {{Alert (AA20-301A): North Korean Advanced Persistent Threat Focus: Kimsuky}}, date = {2020-10-27}, organization = {US-CERT}, url = {https://us-cert.cisa.gov/ncas/alerts/aa20-301a}, language = {English}, urldate = {2023-02-09} } Alert (AA20-301A): North Korean Advanced Persistent Threat Focus: Kimsuky
BabyShark GREASE MECHANICAL Meterpreter Kimsuky
2020-03-04CrowdStrikeCrowdStrike
@techreport{crowdstrike:20200304:2020:818c85f, author = {CrowdStrike}, title = {{2020 CrowdStrike Global Threat Report}}, date = {2020-03-04}, institution = {CrowdStrike}, url = {https://go.crowdstrike.com/rs/281-OBQ-266/images/Report2020CrowdStrikeGlobalThreatReport.pdf}, language = {English}, urldate = {2020-07-24} } 2020 CrowdStrike Global Threat Report
MESSAGETAP More_eggs 8.t Dropper Anchor BabyShark BadNews Clop Cobalt Strike CobInt Cobra Carbon System Cutwail DanaBot Dharma DoppelDridex DoppelPaymer Dridex Emotet FlawedAmmyy FriedEx Gandcrab Get2 IcedID ISFB KerrDown LightNeuron LockerGoga Maze MECHANICAL Necurs Nokki Outlook Backdoor Phobos Predator The Thief QakBot REvil RobinHood Ryuk SDBbot Skipper SmokeLoader TerraRecon TerraStealer TerraTV TinyLoader TrickBot Vidar Winnti ANTHROPOID SPIDER APT23 APT31 APT39 APT40 BlackTech BuhTrap Charming Kitten CLOCKWORK SPIDER DOPPEL SPIDER FIN7 Gamaredon Group GOBLIN PANDA MONTY SPIDER MUSTANG PANDA NARWHAL SPIDER NOCTURNAL SPIDER PINCHY SPIDER SALTY SPIDER SCULLY SPIDER SMOKY SPIDER Thrip VENOM SPIDER VICEROY TIGER
2018-12-05NetScoutASERT Team
@online{team:20181205:stolen:bc9dd60, author = {ASERT Team}, title = {{STOLEN PENCIL Campaign Targets Academia}}, date = {2018-12-05}, organization = {NetScout}, url = {https://asert.arbornetworks.com/stolen-pencil-campaign-targets-academia/}, language = {English}, urldate = {2020-01-08} } STOLEN PENCIL Campaign Targets Academia
GREASE MECHANICAL
Yara Rules
[TLP:WHITE] win_mechanical_auto (20230715 | Detects win.mechanical.)
rule win_mechanical_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.mechanical."
        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.mechanical"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 03c7 3bca 72ed 5f }
            // n = 4, score = 200
            //   03c7                 | add                 eax, edi
            //   3bca                 | cmp                 ecx, edx
            //   72ed                 | jb                  0xffffffef
            //   5f                   | pop                 edi

        $sequence_1 = { 033485c0e54200 8b45e4 8b00 8906 }
            // n = 4, score = 200
            //   033485c0e54200       | add                 esi, dword ptr [eax*4 + 0x42e5c0]
            //   8b45e4               | mov                 eax, dword ptr [ebp - 0x1c]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   8906                 | mov                 dword ptr [esi], eax

        $sequence_2 = { 448b442464 4533c9 4c8d15eb3afeff 41bb00020000 4c898c2498000000 eb1d 488bb424a8000000 }
            // n = 7, score = 200
            //   448b442464           | inc                 esp
            //   4533c9               | mov                 byte ptr [esp + 0x38c0], ah
            //   4c8d15eb3afeff       | xor                 edx, edx
            //   41bb00020000         | inc                 ecx
            //   4c898c2498000000     | mov                 eax, 0x103
            //   eb1d                 | inc                 esp
            //   488bb424a8000000     | mov                 byte ptr [esp + 0x1280], ah

        $sequence_3 = { 03c1 1bc9 0bc1 59 e9???????? e8???????? ff742404 }
            // n = 7, score = 200
            //   03c1                 | add                 eax, ecx
            //   1bc9                 | sbb                 ecx, ecx
            //   0bc1                 | or                  eax, ecx
            //   59                   | pop                 ecx
            //   e9????????           |                     
            //   e8????????           |                     
            //   ff742404             | push                dword ptr [esp + 4]

        $sequence_4 = { 8b442430 488d8c24c1380000 33d2 41b803010000 4488a424c0380000 488905???????? }
            // n = 6, score = 200
            //   8b442430             | lea                 ebx, [0x20d7d]
            //   488d8c24c1380000     | dec                 ecx
            //   33d2                 | mov                 ecx, esp
            //   41b803010000         | dec                 ecx
            //   4488a424c0380000     | mov                 edx, ebx
            //   488905????????       |                     

        $sequence_5 = { 0401 3cbe 8844240b 76e2 }
            // n = 4, score = 200
            //   0401                 | add                 al, 1
            //   3cbe                 | cmp                 al, 0xbe
            //   8844240b             | mov                 byte ptr [esp + 0xb], al
            //   76e2                 | jbe                 0xffffffe4

        $sequence_6 = { 03ce c6840c3801000000 8d8424a05c0000 33f6 }
            // n = 4, score = 200
            //   03ce                 | add                 ecx, esi
            //   c6840c3801000000     | mov                 byte ptr [esp + ecx + 0x138], 0
            //   8d8424a05c0000       | lea                 eax, [esp + 0x5ca0]
            //   33f6                 | xor                 esi, esi

        $sequence_7 = { 4533c0 33d2 33c9 4889742420 e8???????? 4c8d0557980000 }
            // n = 6, score = 200
            //   4533c0               | dec                 eax
            //   33d2                 | lea                 ecx, [esp + 0x38c1]
            //   33c9                 | xor                 edx, edx
            //   4889742420           | inc                 ecx
            //   e8????????           |                     
            //   4c8d0557980000       | mov                 eax, 0x103

        $sequence_8 = { e8???????? 488d8c24fb060000 33d2 41b8e5640000 }
            // n = 4, score = 200
            //   e8????????           |                     
            //   488d8c24fb060000     | dec                 eax
            //   33d2                 | mov                 dword ptr [esp + 0x20], esi
            //   41b8e5640000         | dec                 esp

        $sequence_9 = { 00686c 42 0023 d18a0688078a }
            // n = 4, score = 200
            //   00686c               | add                 byte ptr [eax + 0x6c], ch
            //   42                   | inc                 edx
            //   0023                 | add                 byte ptr [ebx], ah
            //   d18a0688078a         | ror                 dword ptr [edx - 0x75f877fa], 1

        $sequence_10 = { 030495c0e54200 eb05 b8???????? f6400420 }
            // n = 4, score = 200
            //   030495c0e54200       | add                 eax, dword ptr [edx*4 + 0x42e5c0]
            //   eb05                 | jmp                 7
            //   b8????????           |                     
            //   f6400420             | test                byte ptr [eax + 4], 0x20

        $sequence_11 = { 4983c101 4d85c0 75eb 4183f922 0f85b8000000 488bc8 0fb601 }
            // n = 7, score = 200
            //   4983c101             | dec                 ecx
            //   4d85c0               | add                 ecx, 1
            //   75eb                 | dec                 ebp
            //   4183f922             | test                eax, eax
            //   0f85b8000000         | jne                 0xffffffed
            //   488bc8               | inc                 ecx
            //   0fb601               | cmp                 ecx, 0x22

        $sequence_12 = { 033485c0e54200 c745e401000000 33db 395e08 }
            // n = 4, score = 200
            //   033485c0e54200       | add                 esi, dword ptr [eax*4 + 0x42e5c0]
            //   c745e401000000       | mov                 dword ptr [ebp - 0x1c], 1
            //   33db                 | xor                 ebx, ebx
            //   395e08               | cmp                 dword ptr [esi + 8], ebx

        $sequence_13 = { 33d2 41b803010000 4488a42480120000 488905???????? e8???????? 4c8d1d73310200 }
            // n = 6, score = 200
            //   33d2                 | movzx               eax, byte ptr [edx]
            //   41b803010000         | dec                 eax
            //   4488a42480120000     | add                 edx, 1
            //   488905????????       |                     
            //   e8????????           |                     
            //   4c8d1d73310200       | mov                 eax, dword ptr [esp + 0x30]

        $sequence_14 = { eb17 c6025e eb12 c6022f eb0d c6023f }
            // n = 6, score = 200
            //   eb17                 | dec                 esp
            //   c6025e               | lea                 ebx, [0x23173]
            //   eb12                 | inc                 ebp
            //   c6022f               | xor                 eax, eax
            //   eb0d                 | xor                 edx, edx
            //   c6023f               | xor                 ecx, ecx

        $sequence_15 = { 4c8d1d7d0d0200 498bcc 498bd3 0fb602 4883c201 }
            // n = 5, score = 200
            //   4c8d1d7d0d0200       | jne                 0xbe
            //   498bcc               | dec                 eax
            //   498bd3               | mov                 ecx, eax
            //   0fb602               | movzx               eax, byte ptr [ecx]
            //   4883c201             | dec                 esp

    condition:
        7 of them and filesize < 434176
}
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