SYMBOLCOMMON_NAMEaka. SYNONYMS
win.mechanical (Back to overview)

MECHANICAL

aka: GoldStamp

Actor(s): Kimsuky


There is no description at this point.

References
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 (20230125 | Detects win.mechanical.)
rule win_mechanical_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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                 esi, dword ptr [eax*4 + 0x42e5c0]
            //   3bca                 | mov                 dword ptr [ebp - 0x1c], 1
            //   72ed                 | xor                 ebx, ebx
            //   5f                   | cmp                 dword ptr [esi + 8], ebx

        $sequence_1 = { 83f85c 0f8778010000 4898 0fb68428d4590100 }
            // n = 4, score = 200
            //   83f85c               | dec                 eax
            //   0f8778010000         | lea                 edx, [esp + 0x5680]
            //   4898                 | dec                 eax
            //   0fb68428d4590100     | mov                 ecx, edi

        $sequence_2 = { 4585c0 0f84d0010000 488d942440300000 458bc8 66666690 }
            // n = 5, score = 200
            //   4585c0               | jne                 0xfffffff6
            //   0f84d0010000         | dec                 eax
            //   488d942440300000     | lea                 ecx, [esp + 0x5240]
            //   458bc8               | dec                 ebp
            //   66666690             | mov                 eax, esp

        $sequence_3 = { 03c1 1bc9 0bc1 59 e9???????? e8???????? ff742404 }
            // n = 7, score = 200
            //   03c1                 | push                0xfa0
            //   1bc9                 | add                 esi, dword ptr [eax*4 + 0x42e5c0]
            //   0bc1                 | mov                 dword ptr [ebp - 0x1c], 1
            //   59                   | xor                 ebx, ebx
            //   e9????????           |                     
            //   e8????????           |                     
            //   ff742404             | cmp                 dword ptr [esi + 8], ebx

        $sequence_4 = { 488d9424001b0000 458bc8 66666690 0fb602 458bc4 3c41 }
            // n = 6, score = 200
            //   488d9424001b0000     | inc                 ebp
            //   458bc8               | mov                 ecx, eax
            //   66666690             | nop                 
            //   0fb602               | nop                 
            //   458bc4               | dec                 eax
            //   3c41                 | lea                 edx, [esp + 0x1b00]

        $sequence_5 = { 0401 3cbe 8844240b 76e2 }
            // n = 4, score = 200
            //   0401                 | add                 ecx, esi
            //   3cbe                 | mov                 byte ptr [esp + ecx + 0x138], 0
            //   8844240b             | lea                 eax, [esp + 0x5ca0]
            //   76e2                 | xor                 esi, esi

        $sequence_6 = { 488905???????? e8???????? 4c8d1d5cd40100 498bcc }
            // n = 4, score = 200
            //   488905????????       |                     
            //   e8????????           |                     
            //   4c8d1d5cd40100       | nop                 
            //   498bcc               | movzx               eax, byte ptr [ecx]

        $sequence_7 = { 03ce c6840c3801000000 8d8424a05c0000 33f6 }
            // n = 4, score = 200
            //   03ce                 | jne                 0x38
            //   c6840c3801000000     | add                 esi, dword ptr [eax*4 + 0x42e5c0]
            //   8d8424a05c0000       | mov                 dword ptr [ebp - 0x1c], 1
            //   33f6                 | xor                 ebx, ebx

        $sequence_8 = { 00686c 42 0023 d18a0688078a }
            // n = 4, score = 200
            //   00686c               | lea                 edx, [esp + 0x3040]
            //   42                   | inc                 ebp
            //   0023                 | mov                 ecx, eax
            //   d18a0688078a         | nop                 

        $sequence_9 = { 4488a424401f0000 488905???????? e8???????? 4c8d1da5120200 }
            // n = 4, score = 200
            //   4488a424401f0000     | inc                 ebp
            //   488905????????       |                     
            //   e8????????           |                     
            //   4c8d1da5120200       | mov                 ecx, eax

        $sequence_10 = { 030495c0e54200 eb05 b8???????? f6400420 }
            // n = 4, score = 200
            //   030495c0e54200       | dec                 esp
            //   eb05                 | lea                 eax, [esp + 0x70]
            //   b8????????           |                     
            //   f6400420             | inc                 ecx

        $sequence_11 = { 033485c0e54200 8b45e4 8b00 8906 }
            // n = 4, score = 200
            //   033485c0e54200       | push                2
            //   8b45e4               | add                 eax, dword ptr [edx*4 + 0x42e5c0]
            //   8b00                 | jmp                 7
            //   8906                 | test                byte ptr [eax + 4], 0x20

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

        $sequence_13 = { 88840c400e0000 75ed 488d8c24400e0000 4d8bc4 6690 }
            // n = 5, score = 200
            //   88840c400e0000       | mov                 byte ptr [esp + ecx + 0xe40], al
            //   75ed                 | jne                 0xffffffef
            //   488d8c24400e0000     | dec                 eax
            //   4d8bc4               | lea                 ecx, [esp + 0xe40]
            //   6690                 | dec                 ebp

        $sequence_14 = { 0f84b6010000 488d9424e0070000 458bc8 66666690 66666690 }
            // n = 5, score = 200
            //   0f84b6010000         | mov                 eax, esp
            //   488d9424e0070000     | nop                 
            //   458bc8               | je                  0x1bc
            //   66666690             | dec                 eax
            //   66666690             | lea                 edx, [esp + 0x7e0]

        $sequence_15 = { 488d942480560000 488bcf ff15???????? 85c0 8903 }
            // n = 5, score = 200
            //   488d942480560000     | mov                 byte ptr [esp + 0x1f40], ah
            //   488bcf               | dec                 esp
            //   ff15????????         |                     
            //   85c0                 | lea                 ebx, [0x212a5]
            //   8903                 | mov                 byte ptr [esp + ecx + 0x5240], al

    condition:
        7 of them and filesize < 434176
}
Download all Yara Rules