SYMBOLCOMMON_NAMEaka. SYNONYMS
win.webc2_qbp (Back to overview)

WebC2-Qbp

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_qbp_auto (20201023 | autogenerated rule brought to you by yara-signator)
rule win_webc2_qbp_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_qbp"
        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 = { 6683c201 668955f8 e9???????? 8b45f4 66c78034770000ffff 8b4df4 66c7811a7c00000000 }
            // n = 7, score = 100
            //   6683c201             | add                 dx, 1
            //   668955f8             | mov                 word ptr [ebp - 8], dx
            //   e9????????           |                     
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   66c78034770000ffff     | mov    word ptr [eax + 0x7734], 0xffff
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   66c7811a7c00000000     | mov    word ptr [ecx + 0x7c1a], 0

        $sequence_1 = { 0fbf45f0 0fbf4de8 03c1 25ff0f0000 8b55e4 660fb6440208 668945f8 }
            // n = 7, score = 100
            //   0fbf45f0             | movsx               eax, word ptr [ebp - 0x10]
            //   0fbf4de8             | movsx               ecx, word ptr [ebp - 0x18]
            //   03c1                 | add                 eax, ecx
            //   25ff0f0000           | and                 eax, 0xfff
            //   8b55e4               | mov                 edx, dword ptr [ebp - 0x1c]
            //   660fb6440208         | movzx               ax, byte ptr [edx + eax + 8]
            //   668945f8             | mov                 word ptr [ebp - 8], ax

        $sequence_2 = { 2bc2 d1f8 0500040000 8945f8 }
            // n = 4, score = 100
            //   2bc2                 | sub                 eax, edx
            //   d1f8                 | sar                 eax, 1
            //   0500040000           | add                 eax, 0x400
            //   8945f8               | mov                 dword ptr [ebp - 8], eax

        $sequence_3 = { 50 8b4d08 51 e8???????? 898570ffffff 6801100000 8d9578ffffff }
            // n = 7, score = 100
            //   50                   | push                eax
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   898570ffffff         | mov                 dword ptr [ebp - 0x90], eax
            //   6801100000           | push                0x1001
            //   8d9578ffffff         | lea                 edx, [ebp - 0x88]

        $sequence_4 = { ff15???????? 83c404 33c0 e9???????? 68???????? 8b8ddcfeffff 51 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   83c404               | add                 esp, 4
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     
            //   68????????           |                     
            //   8b8ddcfeffff         | mov                 ecx, dword ptr [ebp - 0x124]
            //   51                   | push                ecx

        $sequence_5 = { 668b4dfc 51 8b4de4 e8???????? eb97 0fbf55e8 85d2 }
            // n = 7, score = 100
            //   668b4dfc             | mov                 cx, word ptr [ebp - 4]
            //   51                   | push                ecx
            //   8b4de4               | mov                 ecx, dword ptr [ebp - 0x1c]
            //   e8????????           |                     
            //   eb97                 | jmp                 0xffffff99
            //   0fbf55e8             | movsx               edx, word ptr [ebp - 0x18]
            //   85d2                 | test                edx, edx

        $sequence_6 = { 6a00 8d4df8 51 8b55f0 52 8b45e8 0345e0 }
            // n = 7, score = 100
            //   6a00                 | push                0
            //   8d4df8               | lea                 ecx, [ebp - 8]
            //   51                   | push                ecx
            //   8b55f0               | mov                 edx, dword ptr [ebp - 0x10]
            //   52                   | push                edx
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   0345e0               | add                 eax, dword ptr [ebp - 0x20]

        $sequence_7 = { e9???????? 8b55f0 8b8290830000 50 6a00 8b4df0 8b9188830000 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8b55f0               | mov                 edx, dword ptr [ebp - 0x10]
            //   8b8290830000         | mov                 eax, dword ptr [edx + 0x8390]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   8b4df0               | mov                 ecx, dword ptr [ebp - 0x10]
            //   8b9188830000         | mov                 edx, dword ptr [ecx + 0x8388]

        $sequence_8 = { 52 ff15???????? 83c404 8985e8fdffff }
            // n = 4, score = 100
            //   52                   | push                edx
            //   ff15????????         |                     
            //   83c404               | add                 esp, 4
            //   8985e8fdffff         | mov                 dword ptr [ebp - 0x218], eax

        $sequence_9 = { 83c103 51 ff15???????? e8???????? ba01000000 85d2 740d }
            // n = 7, score = 100
            //   83c103               | add                 ecx, 3
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   e8????????           |                     
            //   ba01000000           | mov                 edx, 1
            //   85d2                 | test                edx, edx
            //   740d                 | je                  0xf

    condition:
        7 of them and filesize < 630784
}
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