SYMBOLCOMMON_NAMEaka. SYNONYMS
win.webc2_table (Back to overview)

WebC2-Table

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_table_auto (20220411 | Detects win.webc2_table.)
rule win_webc2_table_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.webc2_table."
        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.webc2_table"
        malpedia_rule_date = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 50 e8???????? 6a0f 8d85d8f6ffff 68???????? 50 }
            // n = 6, score = 100
            //   50                   | push                eax
            //   e8????????           |                     
            //   6a0f                 | push                0xf
            //   8d85d8f6ffff         | lea                 eax, dword ptr [ebp - 0x928]
            //   68????????           |                     
            //   50                   | push                eax

        $sequence_1 = { 8dbdd9f6ffff c745e464000000 f3ab 66ab aa }
            // n = 5, score = 100
            //   8dbdd9f6ffff         | lea                 edi, dword ptr [ebp - 0x927]
            //   c745e464000000       | mov                 dword ptr [ebp - 0x1c], 0x64
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   66ab                 | stosw               word ptr es:[edi], ax
            //   aa                   | stosb               byte ptr es:[edi], al

        $sequence_2 = { 40 53 50 ff35???????? ff15???????? }
            // n = 5, score = 100
            //   40                   | inc                 eax
            //   53                   | push                ebx
            //   50                   | push                eax
            //   ff35????????         |                     
            //   ff15????????         |                     

        $sequence_3 = { 3c4d 7e04 3c5a 7e14 3c60 }
            // n = 5, score = 100
            //   3c4d                 | cmp                 al, 0x4d
            //   7e04                 | jle                 6
            //   3c5a                 | cmp                 al, 0x5a
            //   7e14                 | jle                 0x16
            //   3c60                 | cmp                 al, 0x60

        $sequence_4 = { ff15???????? 8d85d8f6ffff 50 8d85d8faffff 50 }
            // n = 5, score = 100
            //   ff15????????         |                     
            //   8d85d8f6ffff         | lea                 eax, dword ptr [ebp - 0x928]
            //   50                   | push                eax
            //   8d85d8faffff         | lea                 eax, dword ptr [ebp - 0x528]
            //   50                   | push                eax

        $sequence_5 = { 59 33c0 8dbde5fdffff 889de4fdffff 6a1d f3ab }
            // n = 6, score = 100
            //   59                   | pop                 ecx
            //   33c0                 | xor                 eax, eax
            //   8dbde5fdffff         | lea                 edi, dword ptr [ebp - 0x21b]
            //   889de4fdffff         | mov                 byte ptr [ebp - 0x21c], bl
            //   6a1d                 | push                0x1d
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax

        $sequence_6 = { 0f84fa020000 81fec8000000 0f8dee020000 8d46f5 50 ff15???????? 8d4ef4 }
            // n = 7, score = 100
            //   0f84fa020000         | je                  0x300
            //   81fec8000000         | cmp                 esi, 0xc8
            //   0f8dee020000         | jge                 0x2f4
            //   8d46f5               | lea                 eax, dword ptr [esi - 0xb]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8d4ef4               | lea                 ecx, dword ptr [esi - 0xc]

        $sequence_7 = { 391d???????? 7420 68???????? ff15???????? 69c060ea0000 59 50 }
            // n = 7, score = 100
            //   391d????????         |                     
            //   7420                 | je                  0x22
            //   68????????           |                     
            //   ff15????????         |                     
            //   69c060ea0000         | imul                eax, eax, 0xea60
            //   59                   | pop                 ecx
            //   50                   | push                eax

        $sequence_8 = { 50 895df8 e8???????? 6a0d 8d45e4 68???????? }
            // n = 6, score = 100
            //   50                   | push                eax
            //   895df8               | mov                 dword ptr [ebp - 8], ebx
            //   e8????????           |                     
            //   6a0d                 | push                0xd
            //   8d45e4               | lea                 eax, dword ptr [ebp - 0x1c]
            //   68????????           |                     

        $sequence_9 = { 53 53 53 ff15???????? 8b3d???????? 50 ffd7 }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   8b3d????????         |                     
            //   50                   | push                eax
            //   ffd7                 | call                edi

    condition:
        7 of them and filesize < 49152
}
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