SYMBOLCOMMON_NAMEaka. SYNONYMS
win.faketc (Back to overview)

FakeTC

Actor(s): Sandworm


There is no description at this point.

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 (20201014 | autogenerated rule brought to you by yara-signator)
rule win_faketc_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.faketc"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { c745fc01000000 6a20 8b4d0c 51 e8???????? 83c408 85c0 }
            // n = 7, score = 100
            //   c745fc01000000       | mov                 dword ptr [ebp - 4], 1
            //   6a20                 | push                0x20
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax

        $sequence_1 = { eb09 8b45fc 83c001 8945fc 837dfc0c 7d2a 8b4df8 }
            // n = 7, score = 100
            //   eb09                 | jmp                 0xb
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   83c001               | add                 eax, 1
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   837dfc0c             | cmp                 dword ptr [ebp - 4], 0xc
            //   7d2a                 | jge                 0x2c
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]

        $sequence_2 = { eb08 ff4de8 eb8b 8d4304 8b0f 8b5104 8b4c3a28 }
            // n = 7, score = 100
            //   eb08                 | jmp                 0xa
            //   ff4de8               | dec                 dword ptr [ebp - 0x18]
            //   eb8b                 | jmp                 0xffffff8d
            //   8d4304               | lea                 eax, [ebx + 4]
            //   8b0f                 | mov                 ecx, dword ptr [edi]
            //   8b5104               | mov                 edx, dword ptr [ecx + 4]
            //   8b4c3a28             | mov                 ecx, dword ptr [edx + edi + 0x28]

        $sequence_3 = { f6c203 7441 8b55fc 8b75fc c1fa05 8b149500c76600 83e61f }
            // n = 7, score = 100
            //   f6c203               | test                dl, 3
            //   7441                 | je                  0x43
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   8b75fc               | mov                 esi, dword ptr [ebp - 4]
            //   c1fa05               | sar                 edx, 5
            //   8b149500c76600       | mov                 edx, dword ptr [edx*4 + 0x66c700]
            //   83e61f               | and                 esi, 0x1f

        $sequence_4 = { ff15???????? 3bf4 e8???????? 85c0 7468 8bf4 ff15???????? }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   3bf4                 | cmp                 esi, esp
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7468                 | je                  0x6a
            //   8bf4                 | mov                 esi, esp
            //   ff15????????         |                     

        $sequence_5 = { 8bef 23ee 0bdd 03d9 035c2414 8b4850 334848 }
            // n = 7, score = 100
            //   8bef                 | mov                 ebp, edi
            //   23ee                 | and                 ebp, esi
            //   0bdd                 | or                  ebx, ebp
            //   03d9                 | add                 ebx, ecx
            //   035c2414             | add                 ebx, dword ptr [esp + 0x14]
            //   8b4850               | mov                 ecx, dword ptr [eax + 0x50]
            //   334848               | xor                 ecx, dword ptr [eax + 0x48]

        $sequence_6 = { f7d3 0bde 33df 035c2438 897c2418 8b7c241c 8dbc3ba1ebd96e }
            // n = 7, score = 100
            //   f7d3                 | not                 ebx
            //   0bde                 | or                  ebx, esi
            //   33df                 | xor                 ebx, edi
            //   035c2438             | add                 ebx, dword ptr [esp + 0x38]
            //   897c2418             | mov                 dword ptr [esp + 0x18], edi
            //   8b7c241c             | mov                 edi, dword ptr [esp + 0x1c]
            //   8dbc3ba1ebd96e       | lea                 edi, [ebx + edi + 0x6ed9eba1]

        $sequence_7 = { b9???????? 8d742420 b802000000 e8???????? b910000000 8bc6 8d4900 }
            // n = 7, score = 100
            //   b9????????           |                     
            //   8d742420             | lea                 esi, [esp + 0x20]
            //   b802000000           | mov                 eax, 2
            //   e8????????           |                     
            //   b910000000           | mov                 ecx, 0x10
            //   8bc6                 | mov                 eax, esi
            //   8d4900               | lea                 ecx, [ecx]

        $sequence_8 = { ffd0 85c0 7517 685a040000 ff15???????? e8???????? 5e }
            // n = 7, score = 100
            //   ffd0                 | call                eax
            //   85c0                 | test                eax, eax
            //   7517                 | jne                 0x19
            //   685a040000           | push                0x45a
            //   ff15????????         |                     
            //   e8????????           |                     
            //   5e                   | pop                 esi

        $sequence_9 = { e8???????? eb02 33db 837de8ff 0f8452020000 8d855c110000 c745d80f000000 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   eb02                 | jmp                 4
            //   33db                 | xor                 ebx, ebx
            //   837de8ff             | cmp                 dword ptr [ebp - 0x18], -1
            //   0f8452020000         | je                  0x258
            //   8d855c110000         | lea                 eax, [ebp + 0x115c]
            //   c745d80f000000       | mov                 dword ptr [ebp - 0x28], 0xf

    condition:
        7 of them and filesize < 6864896
}
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