SYMBOLCOMMON_NAMEaka. SYNONYMS
win.chinoxy (Back to overview)

Chinoxy


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References
2021-01-04nao_sec blognao_sec
@online{naosec:20210104:royal:041b9d3, author = {nao_sec}, title = {{Royal Road! Re:Dive}}, date = {2021-01-04}, organization = {nao_sec blog}, url = {https://nao-sec.org/2021/01/royal-road-redive.html}, language = {English}, urldate = {2021-01-05} } Royal Road! Re:Dive
8.t Dropper Chinoxy FlowCloud FunnyDream Lookback
2020-12-15Trend MicroLenart Bermejo, Gilbert Sison, Buddy Tancio
@techreport{bermejo:20201215:finding:f68f005, author = {Lenart Bermejo and Gilbert Sison and Buddy Tancio}, title = {{Finding APTX: Attacks via MITRE TTPs}}, date = {2020-12-15}, institution = {Trend Micro}, url = {https://documents.trendmicro.com/assets/white_papers/wp-finding-APTX-attributing-attacks-via-MITRE-TTPs.pdf}, language = {English}, urldate = {2020-12-17} } Finding APTX: Attacks via MITRE TTPs
Chinoxy
2020-11-16BitdefenderVictor Vrabie, Liviu Arsene
@techreport{vrabie:20201116:dissecting:1b39d4d, author = {Victor Vrabie and Liviu Arsene}, title = {{Dissecting a Chinese APT Targeting South Eastern Asian Government Institutions}}, date = {2020-11-16}, institution = {Bitdefender}, url = {https://www.bitdefender.com/files/News/CaseStudies/study/379/Bitdefender-Whitepaper-Chinese-APT.pdf}, language = {English}, urldate = {2020-11-18} } Dissecting a Chinese APT Targeting South Eastern Asian Government Institutions
Chinoxy FunnyDream
2020-09-16RiskIQJon Gross
@online{gross:20200916:riskiq:da4b864, author = {Jon Gross}, title = {{RiskIQ: Adventures in Cookie Land - Part 2}}, date = {2020-09-16}, organization = {RiskIQ}, url = {https://community.riskiq.com/article/56fa1b2f}, language = {English}, urldate = {2020-09-23} } RiskIQ: Adventures in Cookie Land - Part 2
8.t Dropper Chinoxy Poison Ivy
2020-08-19RiskIQJon Gross, Cory Kennedy
@online{gross:20200819:riskiq:94e5ccf, author = {Jon Gross and Cory Kennedy}, title = {{RiskIQ Adventures in Cookie Land - Part 1}}, date = {2020-08-19}, organization = {RiskIQ}, url = {https://community.riskiq.com/article/5fe2da7f}, language = {English}, urldate = {2020-09-23} } RiskIQ Adventures in Cookie Land - Part 1
8.t Dropper Chinoxy
2020-07-08Medium (@sevdraven)Sébastien Larinier
@online{larinier:20200708:how:7d692bb, author = {Sébastien Larinier}, title = {{How to unpack Chinoxy backdoor and decipher the configuration of the backdoor}}, date = {2020-07-08}, organization = {Medium (@sevdraven)}, url = {https://medium.com/@Sebdraven/how-to-unpack-chinoxy-backdoor-and-decipher-the-configuration-of-the-backdoor-4ffd98ca2a02}, language = {English}, urldate = {2020-07-11} } How to unpack Chinoxy backdoor and decipher the configuration of the backdoor
Chinoxy
2020-03-20Medium SebdravenSébastien Larinier
@online{larinier:20200320:new:3da1211, author = {Sébastien Larinier}, title = {{New version of chinoxy backdoor using COVID19 alerts document lure}}, date = {2020-03-20}, organization = {Medium Sebdraven}, url = {https://medium.com/@Sebdraven/new-version-of-chinoxy-backdoor-using-covid19-document-lure-83fa294c0746}, language = {English}, urldate = {2020-03-26} } New version of chinoxy backdoor using COVID19 alerts document lure
8.t Dropper Chinoxy
Yara Rules
[TLP:WHITE] win_chinoxy_auto (20201023 | autogenerated rule brought to you by yara-signator)
rule win_chinoxy_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.chinoxy"
        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 = { 8b06 33d0 33c0 89542414 8bfa 8a442416 c1ef18 }
            // n = 7, score = 100
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   33d0                 | xor                 edx, eax
            //   33c0                 | xor                 eax, eax
            //   89542414             | mov                 dword ptr [esp + 0x14], edx
            //   8bfa                 | mov                 edi, edx
            //   8a442416             | mov                 al, byte ptr [esp + 0x16]
            //   c1ef18               | shr                 edi, 0x18

        $sequence_1 = { 6833270000 ff15???????? 5f 5e 5d b8feffffff }
            // n = 6, score = 100
            //   6833270000           | push                0x2733
            //   ff15????????         |                     
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   b8feffffff           | mov                 eax, 0xfffffffe

        $sequence_2 = { 50 8bcf e8???????? 3bc6 5e c7442428ffffffff 8d4c2404 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     
            //   3bc6                 | cmp                 eax, esi
            //   5e                   | pop                 esi
            //   c7442428ffffffff     | mov                 dword ptr [esp + 0x28], 0xffffffff
            //   8d4c2404             | lea                 ecx, [esp + 4]

        $sequence_3 = { c644243002 e8???????? 68???????? 6800100000 8d5740 6a14 52 }
            // n = 7, score = 100
            //   c644243002           | mov                 byte ptr [esp + 0x30], 2
            //   e8????????           |                     
            //   68????????           |                     
            //   6800100000           | push                0x1000
            //   8d5740               | lea                 edx, [edi + 0x40]
            //   6a14                 | push                0x14
            //   52                   | push                edx

        $sequence_4 = { 6a00 85c0 0f849e000000 8d4f34 6a08 51 e8???????? }
            // n = 7, score = 100
            //   6a00                 | push                0
            //   85c0                 | test                eax, eax
            //   0f849e000000         | je                  0xa4
            //   8d4f34               | lea                 ecx, [edi + 0x34]
            //   6a08                 | push                8
            //   51                   | push                ecx
            //   e8????????           |                     

        $sequence_5 = { 8b591c 33eb 33db 33c5 89442414 8be8 8a5c2416 }
            // n = 7, score = 100
            //   8b591c               | mov                 ebx, dword ptr [ecx + 0x1c]
            //   33eb                 | xor                 ebp, ebx
            //   33db                 | xor                 ebx, ebx
            //   33c5                 | xor                 eax, ebp
            //   89442414             | mov                 dword ptr [esp + 0x14], eax
            //   8be8                 | mov                 ebp, eax
            //   8a5c2416             | mov                 bl, byte ptr [esp + 0x16]

        $sequence_6 = { 7406 8b01 6a01 ff10 8b442410 83c304 48 }
            // n = 7, score = 100
            //   7406                 | je                  8
            //   8b01                 | mov                 eax, dword ptr [ecx]
            //   6a01                 | push                1
            //   ff10                 | call                dword ptr [eax]
            //   8b442410             | mov                 eax, dword ptr [esp + 0x10]
            //   83c304               | add                 ebx, 4
            //   48                   | dec                 eax

        $sequence_7 = { 5b c20400 8b06 8bce ff503c 5f }
            // n = 6, score = 100
            //   5b                   | pop                 ebx
            //   c20400               | ret                 4
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   8bce                 | mov                 ecx, esi
            //   ff503c               | call                dword ptr [eax + 0x3c]
            //   5f                   | pop                 edi

        $sequence_8 = { 8bc8 894310 8d343a 8bd1 c1e902 f3a5 8bca }
            // n = 7, score = 100
            //   8bc8                 | mov                 ecx, eax
            //   894310               | mov                 dword ptr [ebx + 0x10], eax
            //   8d343a               | lea                 esi, [edx + edi]
            //   8bd1                 | mov                 edx, ecx
            //   c1e902               | shr                 ecx, 2
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   8bca                 | mov                 ecx, edx

        $sequence_9 = { 83c404 85c0 8984f2905f0100 7453 }
            // n = 4, score = 100
            //   83c404               | add                 esp, 4
            //   85c0                 | test                eax, eax
            //   8984f2905f0100       | mov                 dword ptr [edx + esi*8 + 0x15f90], eax
            //   7453                 | je                  0x55

    condition:
        7 of them and filesize < 1138688
}
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