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
2022-03-01NZZMatthias 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
2022-03-01Github (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
2022-02-28SymantecThreat 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
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
2022-02-28Bleeping 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
2022-02-28ReutersChristopher 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
Yara Rules
[TLP:WHITE] win_daxin_auto (20220516 | Detects win.daxin.)
rule win_daxin_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        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 = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { e9???????? 41b802000000 8bd7 488bc8 }
            // n = 4, score = 300
            //   e9????????           |                     
            //   41b802000000         | dec                 eax
            //   8bd7                 | cmp                 edx, dword ptr [ebx + 0x30]
            //   488bc8               | jb                  0x17

        $sequence_2 = { 884708 4c8b8380000000 4d85c0 7405 }
            // n = 4, score = 300
            //   884708               | dec                 eax
            //   4c8b8380000000       | sub                 ecx, dword ptr [ebx + 0x30]
            //   4d85c0               | test                eax, eax
            //   7405                 | jle                 0x92

        $sequence_3 = { 8991d0000000 488b08 488b00 c1e110 498bd0 03c8 898bcc000000 }
            // n = 7, score = 300
            //   8991d0000000         | mov                 dword ptr [ecx + 0xd0], edx
            //   488b08               | dec                 eax
            //   488b00               | mov                 ecx, dword ptr [eax]
            //   c1e110               | dec                 eax
            //   498bd0               | mov                 eax, dword ptr [eax]
            //   03c8                 | shl                 ecx, 0x10
            //   898bcc000000         | dec                 ecx

        $sequence_4 = { 884710 4885ff 0f84fd000000 488b4728 }
            // n = 4, score = 300
            //   884710               | dec                 eax
            //   4885ff               | mov                 ecx, eax
            //   0f84fd000000         | dec                 eax
            //   488b4728             | mov                 ecx, ebx

        $sequence_5 = { 75dc 33d2 488bcb ff15???????? 33c0 488b5c2430 488b742438 }
            // n = 7, score = 300
            //   75dc                 | dec                 ebp
            //   33d2                 | test                eax, eax
            //   488bcb               | je                  0xa
            //   ff15????????         |                     
            //   33c0                 | mov                 byte ptr [edi + 8], al
            //   488b5c2430           | dec                 esp
            //   488b742438           | mov                 eax, dword ptr [ebx + 0x80]

        $sequence_6 = { 85c0 0f8e8c000000 488b5320 483b5330 7207 }
            // n = 5, score = 300
            //   85c0                 | mov                 ecx, ecx
            //   0f8e8c000000         | inc                 ebp
            //   488b5320             | cmp                 dword ptr [ecx], eax
            //   483b5330             | jne                 0x19
            //   7207                 | inc                 esp

        $sequence_7 = { 884708 448ad8 498bc9 453901 7517 443b4710 0f8da7000000 }
            // n = 7, score = 300
            //   884708               | mov                 edx, eax
            //   448ad8               | add                 ecx, eax
            //   498bc9               | mov                 dword ptr [ebx + 0xcc], ecx
            //   453901               | mov                 byte ptr [edi + 8], al
            //   7517                 | inc                 esp
            //   443b4710             | mov                 bl, al
            //   0f8da7000000         | dec                 ecx

        $sequence_8 = { 884604 8b3b 8b4304 8a5604 }
            // n = 4, score = 100
            //   884604               | mov                 ecx, dword ptr [ebp + 0x18]
            //   8b3b                 | test                ecx, ecx
            //   8b4304               | je                  0x13c
            //   8a5604               | mov                 byte ptr [esi + 4], al

        $sequence_9 = { 884604 8b4608 50 51 }
            // n = 4, score = 100
            //   884604               | test                eax, eax
            //   8b4608               | je                  0xc
            //   50                   | mov                 ecx, eax
            //   51                   | mov                 eax, dword ptr [ecx]

        $sequence_10 = { 884604 85ed 0f8436010000 8b4d18 }
            // n = 4, score = 100
            //   884604               | cdq                 
            //   85ed                 | idiv                ecx
            //   0f8436010000         | mov                 ecx, eax
            //   8b4d18               | and                 eax, 0x1f

        $sequence_11 = { 884604 8b01 85c0 7408 }
            // n = 4, score = 100
            //   884604               | inc                 ecx
            //   8b01                 | movzx               ecx, word ptr [edx + 0xd4]
            //   85c0                 | rol                 cx, 8
            //   7408                 | inc                 cx

        $sequence_12 = { 884604 85db 0f8438010000 8b4b18 85c9 }
            // n = 5, score = 100
            //   884604               | dec                 eax
            //   85db                 | mov                 eax, dword ptr [edi + 0x28]
            //   0f8438010000         | dec                 eax
            //   8b4b18               | test                eax, eax
            //   85c9                 | jmp                 0xffffffd1

        $sequence_13 = { 884604 8b03 8d542410 51 }
            // n = 4, score = 100
            //   884604               | mov                 ecx, dword ptr [ebx + 0x18]
            //   8b03                 | test                ecx, ecx
            //   8d542410             | je                  0x140
            //   51                   | mov                 byte ptr [esi + 4], al

        $sequence_14 = { 884604 8b5f44 85db 745e }
            // n = 4, score = 100
            //   884604               | push                edx
            //   8b5f44               | mov                 byte ptr [esi + 4], al
            //   85db                 | mov                 eax, dword ptr [ebx]
            //   745e                 | lea                 edx, [esp + 0x10]

    condition:
        7 of them and filesize < 3475456
}
Download all Yara Rules