SYMBOLCOMMON_NAMEaka. SYNONYMS
win.webc2_bolid (Back to overview)

WebC2-Bolid

Actor(s): Comment Crew


There is no description at this point.

References
2018MandiantMandiant
@techreport{mandiant:2018:apt1:b76cc4d, author = {Mandiant}, title = {{APT1}}, date = {2018}, institution = {Mandiant}, url = {https://github.com/securitykitten/malware_references/blob/master/Appendix%20C%20(Digital)%20-%20The%20Malware%20Arsenal.pdf}, language = {English}, urldate = {2020-01-13} } APT1
Auriga Biscuit Bouncer Combos CookieBag Dairy GetMail GlooxMail Goggles Hacksfase Helauto Kurton ManItsMe MAPIget MiniASP NewsReels SeaSalt StarsyPound Sword TabMsgSQL Tarsip WebC2-AdSpace WebC2-Ausov WebC2-Bolid WebC2-Cson WebC2-DIV WebC2-GreenCat WebC2-Head WebC2-Kt3 WebC2-Qbp WebC2-Rave WebC2-Table WebC2-UGX WebC2-Yahoo
Yara Rules
[TLP:WHITE] win_webc2_bolid_auto (20201023 | autogenerated rule brought to you by yara-signator)
rule win_webc2_bolid_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.webc2_bolid"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { e8???????? 85c0 0f84fa000000 8b550c 42 52 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   0f84fa000000         | je                  0x100
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   42                   | inc                 edx
            //   52                   | push                edx

        $sequence_1 = { 8d44243c 8d8c24e8000000 50 e8???????? 8b4c2438 8b7c2430 8b74242c }
            // n = 7, score = 100
            //   8d44243c             | lea                 eax, [esp + 0x3c]
            //   8d8c24e8000000       | lea                 ecx, [esp + 0xe8]
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b4c2438             | mov                 ecx, dword ptr [esp + 0x38]
            //   8b7c2430             | mov                 edi, dword ptr [esp + 0x30]
            //   8b74242c             | mov                 esi, dword ptr [esp + 0x2c]

        $sequence_2 = { c744241000000000 8a442470 6a00 8d4c2444 c744246c01000000 88442444 }
            // n = 6, score = 100
            //   c744241000000000     | mov                 dword ptr [esp + 0x10], 0
            //   8a442470             | mov                 al, byte ptr [esp + 0x70]
            //   6a00                 | push                0
            //   8d4c2444             | lea                 ecx, [esp + 0x44]
            //   c744246c01000000     | mov                 dword ptr [esp + 0x6c], 1
            //   88442444             | mov                 byte ptr [esp + 0x44], al

        $sequence_3 = { 8db6ec164100 bf???????? a5 a5 59 a3???????? a5 }
            // n = 7, score = 100
            //   8db6ec164100         | lea                 esi, [esi + 0x4116ec]
            //   bf????????           |                     
            //   a5                   | movsd               dword ptr es:[edi], dword ptr [esi]
            //   a5                   | movsd               dword ptr es:[edi], dword ptr [esi]
            //   59                   | pop                 ecx
            //   a3????????           |                     
            //   a5                   | movsd               dword ptr es:[edi], dword ptr [esi]

        $sequence_4 = { 49 c68424fc0100000f 51 68???????? 52 53 8d8c24c4000000 }
            // n = 7, score = 100
            //   49                   | dec                 ecx
            //   c68424fc0100000f     | mov                 byte ptr [esp + 0x1fc], 0xf
            //   51                   | push                ecx
            //   68????????           |                     
            //   52                   | push                edx
            //   53                   | push                ebx
            //   8d8c24c4000000       | lea                 ecx, [esp + 0xc4]

        $sequence_5 = { 56 8d8d58ffffff e8???????? 3bc6 0f84a8000000 }
            // n = 5, score = 100
            //   56                   | push                esi
            //   8d8d58ffffff         | lea                 ecx, [ebp - 0xa8]
            //   e8????????           |                     
            //   3bc6                 | cmp                 eax, esi
            //   0f84a8000000         | je                  0xae

        $sequence_6 = { 84c0 741a 8b5604 57 68???????? 52 e8???????? }
            // n = 7, score = 100
            //   84c0                 | test                al, al
            //   741a                 | je                  0x1c
            //   8b5604               | mov                 edx, dword ptr [esi + 4]
            //   57                   | push                edi
            //   68????????           |                     
            //   52                   | push                edx
            //   e8????????           |                     

        $sequence_7 = { e8???????? 8d4de4 8d55a0 51 b30a 50 52 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8d4de4               | lea                 ecx, [ebp - 0x1c]
            //   8d55a0               | lea                 edx, [ebp - 0x60]
            //   51                   | push                ecx
            //   b30a                 | mov                 bl, 0xa
            //   50                   | push                eax
            //   52                   | push                edx

        $sequence_8 = { 83c9ff 8855b8 8945bc 8945c0 }
            // n = 4, score = 100
            //   83c9ff               | or                  ecx, 0xffffffff
            //   8855b8               | mov                 byte ptr [ebp - 0x48], dl
            //   8945bc               | mov                 dword ptr [ebp - 0x44], eax
            //   8945c0               | mov                 dword ptr [ebp - 0x40], eax

        $sequence_9 = { 8b4dbc 85c9 7505 b9???????? }
            // n = 4, score = 100
            //   8b4dbc               | mov                 ecx, dword ptr [ebp - 0x44]
            //   85c9                 | test                ecx, ecx
            //   7505                 | jne                 7
            //   b9????????           |                     

    condition:
        7 of them and filesize < 163840
}
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