SYMBOLCOMMON_NAMEaka. SYNONYMS
win.faketc (Back to overview)

FakeTC


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References
2015-07-30ESET ResearchRobert Lipovsky, Anton Cherepanov
@techreport{lipovsky:20150730:operation:bfe3508, author = {Robert Lipovsky and Anton Cherepanov}, title = {{Operation Potao Express: Analysis of a cyber‑espionage toolkit}}, date = {2015-07-30}, institution = {ESET Research}, url = {https://www.welivesecurity.com/wp-content/uploads/2015/07/Operation-Potao-Express_final_v2.pdf}, language = {English}, urldate = {2020-02-25} } Operation Potao Express: Analysis of a cyber‑espionage toolkit
FakeTC
2015-07-30ESET ResearchRobert Lipovsky, Anton Cherepanov
@online{lipovsky:20150730:operation:3e5afee, author = {Robert Lipovsky and Anton Cherepanov}, title = {{Operation Potao Express: Analysis of a cyber‑espionage toolkit}}, date = {2015-07-30}, organization = {ESET Research}, url = {http://www.welivesecurity.com/2015/07/30/operation-potao-express/}, language = {English}, urldate = {2019-12-20} } Operation Potao Express: Analysis of a cyber‑espionage toolkit
FakeTC
Yara Rules
[TLP:WHITE] win_faketc_auto (20210616 | Detects win.faketc.)
rule win_faketc_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.faketc."
        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.faketc"
        malpedia_rule_date = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { e9???????? 6a03 68???????? 8d8c24ec000000 89b42404010000 899c2400010000 889c24f0000000 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   6a03                 | push                3
            //   68????????           |                     
            //   8d8c24ec000000       | lea                 ecx, dword ptr [esp + 0xec]
            //   89b42404010000       | mov                 dword ptr [esp + 0x104], esi
            //   899c2400010000       | mov                 dword ptr [esp + 0x100], ebx
            //   889c24f0000000       | mov                 byte ptr [esp + 0xf0], bl

        $sequence_1 = { eb49 8b5510 52 8b450c 50 8b4d08 8b5108 }
            // n = 7, score = 100
            //   eb49                 | jmp                 0x4b
            //   8b5510               | mov                 edx, dword ptr [ebp + 0x10]
            //   52                   | push                edx
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   50                   | push                eax
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   8b5108               | mov                 edx, dword ptr [ecx + 8]

        $sequence_2 = { ff15???????? 83c404 3bf4 e8???????? 8b8decfbffff 894104 8bf4 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   83c404               | add                 esp, 4
            //   3bf4                 | cmp                 esi, esp
            //   e8????????           |                     
            //   8b8decfbffff         | mov                 ecx, dword ptr [ebp - 0x414]
            //   894104               | mov                 dword ptr [ecx + 4], eax
            //   8bf4                 | mov                 esi, esp

        $sequence_3 = { eb2c 8b4508 c780a804000000000000 c780ac04000000000000 8b4d08 8b91d8040000 83e2bf }
            // n = 7, score = 100
            //   eb2c                 | jmp                 0x2e
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   c780a804000000000000     | mov    dword ptr [eax + 0x4a8], 0
            //   c780ac04000000000000     | mov    dword ptr [eax + 0x4ac], 0
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   8b91d8040000         | mov                 edx, dword ptr [ecx + 0x4d8]
            //   83e2bf               | and                 edx, 0xffffffbf

        $sequence_4 = { ffd7 85c0 7479 c7442428044d6100 ffd7 68???????? 8d54242c }
            // n = 7, score = 100
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax
            //   7479                 | je                  0x7b
            //   c7442428044d6100     | mov                 dword ptr [esp + 0x28], 0x614d04
            //   ffd7                 | call                edi
            //   68????????           |                     
            //   8d54242c             | lea                 edx, dword ptr [esp + 0x2c]

        $sequence_5 = { eb03 8d4304 85c0 741b 8bd8 e8???????? 8bf8 }
            // n = 7, score = 100
            //   eb03                 | jmp                 5
            //   8d4304               | lea                 eax, dword ptr [ebx + 4]
            //   85c0                 | test                eax, eax
            //   741b                 | je                  0x1d
            //   8bd8                 | mov                 ebx, eax
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax

        $sequence_6 = { e8???????? c745f800000000 33c9 75d9 837df400 741d 8bf4 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   c745f800000000       | mov                 dword ptr [ebp - 8], 0
            //   33c9                 | xor                 ecx, ecx
            //   75d9                 | jne                 0xffffffdb
            //   837df400             | cmp                 dword ptr [ebp - 0xc], 0
            //   741d                 | je                  0x1f
            //   8bf4                 | mov                 esi, esp

        $sequence_7 = { ffd6 50 ffd3 a1???????? 99 6a00 33c2 }
            // n = 7, score = 100
            //   ffd6                 | call                esi
            //   50                   | push                eax
            //   ffd3                 | call                ebx
            //   a1????????           |                     
            //   99                   | cdq                 
            //   6a00                 | push                0
            //   33c2                 | xor                 eax, edx

        $sequence_8 = { b917000000 8d758e bf???????? f3a5 66a5 c745fcffffffff 833d????????00 }
            // n = 7, score = 100
            //   b917000000           | mov                 ecx, 0x17
            //   8d758e               | lea                 esi, dword ptr [ebp - 0x72]
            //   bf????????           |                     
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   66a5                 | movsw               word ptr es:[edi], word ptr [esi]
            //   c745fcffffffff       | mov                 dword ptr [ebp - 4], 0xffffffff
            //   833d????????00       |                     

        $sequence_9 = { eb53 a900040000 0f8479050000 8bb7a8010000 3bf3 0f844b050000 8b97ac010000 }
            // n = 7, score = 100
            //   eb53                 | jmp                 0x55
            //   a900040000           | test                eax, 0x400
            //   0f8479050000         | je                  0x57f
            //   8bb7a8010000         | mov                 esi, dword ptr [edi + 0x1a8]
            //   3bf3                 | cmp                 esi, ebx
            //   0f844b050000         | je                  0x551
            //   8b97ac010000         | mov                 edx, dword ptr [edi + 0x1ac]

    condition:
        7 of them and filesize < 6864896
}
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