SYMBOLCOMMON_NAMEaka. SYNONYMS
win.daxin (Back to overview)

Daxin


Symantec describes this as a malware written as Windows kernel driver, used by China-linked threat actors. The malware has a custom TCP/IP stack and is capable of hijacking connections.

References
2022-03-09SymantecThreat Hunter Team
@online{team:20220309:daxin:18d9025, author = {Threat Hunter Team}, title = {{Daxin Backdoor: In-Depth Analysis, Part Two}}, date = {2022-03-09}, organization = {Symantec}, url = {https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/daxin-backdoor-espionage-analysis}, language = {English}, urldate = {2022-03-10} } Daxin Backdoor: In-Depth Analysis, Part Two
Daxin
2022-03-08SymantecThreat Hunter Team
@online{team:20220308:daxin:04deb91, author = {Threat Hunter Team}, title = {{Daxin Backdoor: In-Depth Analysis, Part One}}, date = {2022-03-08}, organization = {Symantec}, url = {https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/daxin-malware-espionage-analysis}, language = {English}, urldate = {2022-03-14} } Daxin Backdoor: In-Depth Analysis, Part One
Daxin
2022-03-01Github (usualsuspect)Johann Aydinbas
@online{aydinbas:20220301:python:1e7cf7b, author = {Johann Aydinbas}, title = {{Python script to decrypt embedded driver used in Daxin}}, date = {2022-03-01}, organization = {Github (usualsuspect)}, url = {https://gist.github.com/usualsuspect/839fbc54e0d76bb2626329cd94274cd6}, language = {English}, urldate = {2022-03-07} } Python script to decrypt embedded driver used in Daxin
Daxin
2022-03-01NZZMatthias Sander, Shenzhen
@online{sander:20220301:china:a8c83ec, author = {Matthias Sander and Shenzhen}, title = {{China soll mit präzedenzlos ausgeklügelter Malware Regierungen ausspioniert haben}}, date = {2022-03-01}, organization = {NZZ}, url = {https://www.nzz.ch/technologie/china-soll-mit-praezedenzloser-malware-regierungen-ausspioniert-haben-ld.1672292}, language = {German}, urldate = {2022-03-14} } China soll mit präzedenzlos ausgeklügelter Malware Regierungen ausspioniert haben
Daxin
2022-02-28Bleeping ComputerBill Toulas
@online{toulas:20220228:chinese:217b9bf, author = {Bill Toulas}, title = {{Chinese cyberspies target govts with their ‘most advanced’ backdoor}}, date = {2022-02-28}, organization = {Bleeping Computer}, url = {https://www.bleepingcomputer.com/news/security/chinese-cyberspies-target-govts-with-their-most-advanced-backdoor/}, language = {English}, urldate = {2022-03-01} } Chinese cyberspies target govts with their ‘most advanced’ backdoor
Daxin
2022-02-28Twitter (@M_haggis)The Haag
@online{haag:20220228:parsing:7eb8f68, author = {The Haag}, title = {{Tweet on parsing Daxin driver metadata using powershell}}, date = {2022-02-28}, organization = {Twitter (@M_haggis)}, url = {https://twitter.com/M_haggis/status/1498399791276912640}, language = {English}, urldate = {2022-03-07} } Tweet on parsing Daxin driver metadata using powershell
Daxin
2022-02-28ReutersChristopher Bing
@online{bing:20220228:new:f79957b, author = {Christopher Bing}, title = {{New Chinese hacking tool found, spurring U.S. warning to allies}}, date = {2022-02-28}, organization = {Reuters}, url = {https://www.reuters.com/technology/new-chinese-hacking-tool-found-spurring-us-warning-allies-2022-02-28/}, language = {English}, urldate = {2022-03-08} } New Chinese hacking tool found, spurring U.S. warning to allies
Daxin
2022-02-28SymantecThreat Hunter Team
@online{team:20220228:daxin:164f01a, author = {Threat Hunter Team}, title = {{Daxin: Stealthy Backdoor Designed for Attacks Against Hardened Networks}}, date = {2022-02-28}, organization = {Symantec}, url = {https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/daxin-backdoor-espionage}, language = {English}, urldate = {2022-03-01} } Daxin: Stealthy Backdoor Designed for Attacks Against Hardened Networks
Daxin
Yara Rules
[TLP:WHITE] win_daxin_auto (20220808 | Detects win.daxin.)
rule win_daxin_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        version = "1"
        description = "Detects win.daxin."
        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.daxin"
        malpedia_rule_date = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { 2bc2 d1f8 99 f7f9 }
            // n = 4, score = 400
            //   2bc2                 | sub                 eax, edx
            //   d1f8                 | sar                 eax, 1
            //   99                   | cdq                 
            //   f7f9                 | idiv                ecx

        $sequence_1 = { 4c8bcf 48896c2428 21542420 ff15???????? }
            // n = 4, score = 300
            //   4c8bcf               | mov                 byte ptr [edx + 0x4b], al
            //   48896c2428           | dec                 esp
            //   21542420             | sub                 ecx, eax
            //   ff15????????         |                     

        $sequence_2 = { 4c8bca 4488424b 4c2bc8 44899ad0000000 }
            // n = 4, score = 300
            //   4c8bca               | mov                 dword ptr [ebx + 0x18], eax
            //   4488424b             | dec                 esp
            //   4c2bc8               | mov                 eax, edi
            //   44899ad0000000       | mov                 edx, 0xc

        $sequence_3 = { 4c8bce be02000000 41b800000010 8bd6 }
            // n = 4, score = 300
            //   4c8bce               | dec                 esp
            //   be02000000           | mov                 eax, edi
            //   41b800000010         | mov                 edx, 0xc
            //   8bd6                 | inc                 esp

        $sequence_4 = { 4c8bc7 ba0c000000 448bc8 66c1e008 }
            // n = 4, score = 300
            //   4c8bc7               | dec                 eax
            //   ba0c000000           | mov                 edx, ebp
            //   448bc8               | dec                 esp
            //   66c1e008             | mov                 ebx, dword ptr [esi + 0xf0]

        $sequence_5 = { 4c8bc9 e8???????? 498bd0 498bc9 }
            // n = 4, score = 300
            //   4c8bc9               | dec                 eax
            //   e8????????           |                     
            //   498bd0               | mov                 eax, dword ptr [esi + 0xf8]
            //   498bc9               | dec                 ecx

        $sequence_6 = { 4c8bc7 33d2 48894628 e8???????? 488b4e28 4c8bc3 baff000000 }
            // n = 7, score = 300
            //   4c8bc7               | dec                 esp
            //   33d2                 | mov                 eax, edi
            //   48894628             | xor                 edx, edx
            //   e8????????           |                     
            //   488b4e28             | dec                 eax
            //   4c8bc3               | mov                 dword ptr [esi + 0x28], eax
            //   baff000000           | dec                 eax

        $sequence_7 = { 4c8bc7 498d0c04 488bd5 e8???????? }
            // n = 4, score = 300
            //   4c8bc7               | mov                 eax, edi
            //   498d0c04             | xor                 edx, edx
            //   488bd5               | dec                 eax
            //   e8????????           |                     

        $sequence_8 = { 884604 8b7d44 85ff 0f848f000000 }
            // n = 4, score = 100
            //   884604               | mov                 eax, 0x10000000
            //   8b7d44               | mov                 edx, esi
            //   85ff                 | inc                 ecx
            //   0f848f000000         | cmp                 eax, esi

        $sequence_9 = { 884704 898e88000000 c7868c00000000000000 899690000000 }
            // n = 4, score = 100
            //   884704               | mov                 edi, dword ptr [ebp + 0x44]
            //   898e88000000         | test                edi, edi
            //   c7868c00000000000000     | je    0x9a
            //   899690000000         | mov                 byte ptr [esi + 4], al

        $sequence_10 = { 884604 8b5f44 85db 745e 8b13 8954241c 8b4320 }
            // n = 7, score = 100
            //   884604               | mov                 edx, esi
            //   8b5f44               | inc                 ecx
            //   85db                 | cmp                 eax, esi
            //   745e                 | dec                 esp
            //   8b13                 | mov                 ecx, esi
            //   8954241c             | mov                 esi, 2
            //   8b4320               | inc                 ecx

        $sequence_11 = { 884704 8b0e 8bc6 85c9 }
            // n = 4, score = 100
            //   884704               | mov                 eax, edi
            //   8b0e                 | mov                 edi, dword ptr [esi + 0x14]
            //   8bc6                 | xor                 edx, edx
            //   85c9                 | mov                 byte ptr [esi + 4], al

        $sequence_12 = { 884606 c6460880 8a5730 885609 }
            // n = 4, score = 100
            //   884606               | cdq                 
            //   c6460880             | sub                 eax, edx
            //   8a5730               | sar                 eax, 1
            //   885609               | cdq                 

        $sequence_13 = { 884704 33c0 85ed 7e32 }
            // n = 4, score = 100
            //   884704               | jne                 0x1b
            //   33c0                 | cmp                 edx, dword ptr [esi + 0x80]
            //   85ed                 | jl                  0xf1
            //   7e32                 | dec                 eax

        $sequence_14 = { 884604 8bc7 8b7e14 33d2 }
            // n = 4, score = 100
            //   884604               | dec                 esp
            //   8bc7                 | mov                 ebx, eax
            //   8b7e14               | dec                 eax
            //   33d2                 | test                eax, eax

    condition:
        7 of them and filesize < 3475456
}
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