SYMBOLCOMMON_NAMEaka. SYNONYMS
win.new_ct (Back to overview)

NewCT

aka: CT

Actor(s): DragonOK


There is no description at this point.

References
2020SecureworksSecureWorks
@online{secureworks:2020:bronze:fcb04ab, author = {SecureWorks}, title = {{BRONZE EXPRESS}}, date = {2020}, organization = {Secureworks}, url = {https://www.secureworks.com/research/threat-profiles/bronze-express}, language = {English}, urldate = {2020-05-23} } BRONZE EXPRESS
9002 RAT CHINACHOPPER IsSpace NewCT PlugX smac APT 26
2014-09-30FireEyeThoufique Haq, Ned Moran, Sai Vashisht, Mike Scott
@techreport{haq:20140930:operation:ce4e85c, author = {Thoufique Haq and Ned Moran and Sai Vashisht and Mike Scott}, title = {{OPERATION QUANTUM ENTANGLEMENT}}, date = {2014-09-30}, institution = {FireEye}, url = {https://www.fireeye.com/content/dam/fireeye-www/global/en/current-threats/pdfs/wp-operation-quantum-entanglement.pdf}, language = {English}, urldate = {2020-01-08} } OPERATION QUANTUM ENTANGLEMENT
NewCT DragonOK
Yara Rules
[TLP:WHITE] win_new_ct_auto (20201023 | autogenerated rule brought to you by yara-signator)
rule win_new_ct_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.new_ct"
        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 = { 51 ffd7 8b542428 52 ffd7 8b8580030000 50 }
            // n = 7, score = 200
            //   51                   | push                ecx
            //   ffd7                 | call                edi
            //   8b542428             | mov                 edx, dword ptr [esp + 0x28]
            //   52                   | push                edx
            //   ffd7                 | call                edi
            //   8b8580030000         | mov                 eax, dword ptr [ebp + 0x380]
            //   50                   | push                eax

        $sequence_1 = { c1e902 f3a5 8bc8 83e103 f3a4 8b4c2414 8d7c1104 }
            // n = 7, score = 200
            //   c1e902               | shr                 ecx, 2
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   8bc8                 | mov                 ecx, eax
            //   83e103               | and                 ecx, 3
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   8b4c2414             | mov                 ecx, dword ptr [esp + 0x14]
            //   8d7c1104             | lea                 edi, [ecx + edx + 4]

        $sequence_2 = { 53 52 e8???????? 8dbc2480020000 83c9ff 33c0 83c440 }
            // n = 7, score = 200
            //   53                   | push                ebx
            //   52                   | push                edx
            //   e8????????           |                     
            //   8dbc2480020000       | lea                 edi, [esp + 0x280]
            //   83c9ff               | or                  ecx, 0xffffffff
            //   33c0                 | xor                 eax, eax
            //   83c440               | add                 esp, 0x40

        $sequence_3 = { 85c0 0f846b020000 68???????? 8d85e4feffff 50 ff15???????? }
            // n = 6, score = 200
            //   85c0                 | test                eax, eax
            //   0f846b020000         | je                  0x271
            //   68????????           |                     
            //   8d85e4feffff         | lea                 eax, [ebp - 0x11c]
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_4 = { ff15???????? 50 ff15???????? 68e8030000 ff15???????? 8bc7 5f }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   68e8030000           | push                0x3e8
            //   ff15????????         |                     
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi

        $sequence_5 = { 83c40c f2ae f7d1 49 8d7c2478 }
            // n = 5, score = 200
            //   83c40c               | add                 esp, 0xc
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   f7d1                 | not                 ecx
            //   49                   | dec                 ecx
            //   8d7c2478             | lea                 edi, [esp + 0x78]

        $sequence_6 = { 740d 8d942414020000 52 ffd0 83c404 5f 5e }
            // n = 7, score = 200
            //   740d                 | je                  0xf
            //   8d942414020000       | lea                 edx, [esp + 0x214]
            //   52                   | push                edx
            //   ffd0                 | call                eax
            //   83c404               | add                 esp, 4
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi

        $sequence_7 = { 8995d4feffff 8b8584faffff 8985ccfeffff 8b4510 890c03 83c304 }
            // n = 6, score = 200
            //   8995d4feffff         | mov                 dword ptr [ebp - 0x12c], edx
            //   8b8584faffff         | mov                 eax, dword ptr [ebp - 0x57c]
            //   8985ccfeffff         | mov                 dword ptr [ebp - 0x134], eax
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   890c03               | mov                 dword ptr [ebx + eax], ecx
            //   83c304               | add                 ebx, 4

        $sequence_8 = { 5b 81c4680f0000 c21400 8b8e80030000 33d2 bb19000000 8b39 }
            // n = 7, score = 200
            //   5b                   | pop                 ebx
            //   81c4680f0000         | add                 esp, 0xf68
            //   c21400               | ret                 0x14
            //   8b8e80030000         | mov                 ecx, dword ptr [esi + 0x380]
            //   33d2                 | xor                 edx, edx
            //   bb19000000           | mov                 ebx, 0x19
            //   8b39                 | mov                 edi, dword ptr [ecx]

        $sequence_9 = { 8d7c240d 8844240c 33c0 f3ab 8d8c24a4000000 51 }
            // n = 6, score = 200
            //   8d7c240d             | lea                 edi, [esp + 0xd]
            //   8844240c             | mov                 byte ptr [esp + 0xc], al
            //   33c0                 | xor                 eax, eax
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   8d8c24a4000000       | lea                 ecx, [esp + 0xa4]
            //   51                   | push                ecx

    condition:
        7 of them and filesize < 122880
}
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