SYMBOLCOMMON_NAMEaka. SYNONYMS
win.xxmm (Back to overview)

xxmm

aka: ShadowWalker

Actor(s): Tick


There is no description at this point.

References
2020-01-28Macnica NetworksMacnica Networks
@online{networks:20200128:tick:e511a29, author = {Macnica Networks}, title = {{Tick ​​Group Aiming at Japanese Manufacturing}}, date = {2020-01-28}, organization = {Macnica Networks}, url = {https://www.macnica.net/mpressioncss/feature_05.html/}, language = {Japanese}, urldate = {2021-01-01} } Tick ​​Group Aiming at Japanese Manufacturing
Datper xxmm
2020SecureworksSecureWorks
@online{secureworks:2020:bronze:ef493d6, author = {SecureWorks}, title = {{BRONZE BUTLER}}, date = {2020}, organization = {Secureworks}, url = {https://www.secureworks.com/research/threat-profiles/bronze-butler}, language = {English}, urldate = {2020-05-23} } BRONZE BUTLER
Daserf xxmm Tick
2019-01-18Dell SecureworksYou Nakatsuru
@techreport{nakatsuru:20190118:understanding:15cc8b9, author = {You Nakatsuru}, title = {{Understanding Command and Control - An Anatomy of xxmm Communication}}, date = {2019-01-18}, institution = {Dell Secureworks}, url = {https://jsac.jpcert.or.jp/archive/2019/pdf/JSAC2019_8_nakatsuru_en.pdf}, language = {English}, urldate = {2019-12-10} } Understanding Command and Control - An Anatomy of xxmm Communication
xxmm
2018-10-01Macnica NetworksMacnica Networks
@techreport{networks:20181001:trends:17b1db5, author = {Macnica Networks}, title = {{Trends in cyber espionage (targeted attacks) targeting Japan | First half of 2018}}, date = {2018-10-01}, institution = {Macnica Networks}, url = {https://www.macnica.net/file/mpressioncss_2018-1h-report_mnc_rev3_nopw.pdf}, language = {Japanese}, urldate = {2021-03-02} } Trends in cyber espionage (targeted attacks) targeting Japan | First half of 2018
Anel Cobalt Strike Datper FlawedAmmyy Quasar RAT RedLeaves taidoor Winnti xxmm
2017-11-07Trend MicroTrendmicro
@online{trendmicro:20171107:redbaldknightbronze:f7c817f, author = {Trendmicro}, title = {{REDBALDKNIGHT/BRONZE BUTLER’s Daserf Backdoor Now Using Steganography}}, date = {2017-11-07}, organization = {Trend Micro}, url = {http://blog.trendmicro.com/trendlabs-security-intelligence/redbaldknight-bronze-butler-daserf-backdoor-now-using-steganography/}, language = {English}, urldate = {2019-11-27} } REDBALDKNIGHT/BRONZE BUTLER’s Daserf Backdoor Now Using Steganography
Daserf Datper xxmm
2017-10-12SecureworksCTU Research Team
@online{team:20171012:bronze:7b9ae02, author = {CTU Research Team}, title = {{BRONZE BUTLER Targets Japanese Enterprises}}, date = {2017-10-12}, organization = {Secureworks}, url = {https://www.secureworks.com/research/bronze-butler-targets-japanese-businesses}, language = {English}, urldate = {2020-01-07} } BRONZE BUTLER Targets Japanese Enterprises
Daserf Datper rarstar xxmm Tick
2017-04-25CybereasonAssaf Dahan
@online{dahan:20170425:shadowwali:565d1c1, author = {Assaf Dahan}, title = {{ShadowWali: New variant of the xxmm family of backdoors}}, date = {2017-04-25}, organization = {Cybereason}, url = {https://www.cybereason.com/blog/labs-shadowwali-new-variant-of-the-xxmm-family-of-backdoors}, language = {English}, urldate = {2020-02-11} } ShadowWali: New variant of the xxmm family of backdoors
xxmm
Yara Rules
[TLP:WHITE] win_xxmm_auto (20221125 | Detects win.xxmm.)
rule win_xxmm_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.xxmm."
        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.xxmm"
        malpedia_rule_date = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { 03c1 0fb74814 8d4c0118 3b7114 7303 8bc6 c3 }
            // n = 7, score = 600
            //   03c1                 | add                 eax, ecx
            //   0fb74814             | movzx               ecx, word ptr [eax + 0x14]
            //   8d4c0118             | lea                 ecx, [ecx + eax + 0x18]
            //   3b7114               | cmp                 esi, dword ptr [ecx + 0x14]
            //   7303                 | jae                 5
            //   8bc6                 | mov                 eax, esi
            //   c3                   | ret                 

        $sequence_1 = { 8945f0 3bc1 0f8568feffff 8b733c }
            // n = 4, score = 600
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   3bc1                 | cmp                 eax, ecx
            //   0f8568feffff         | jne                 0xfffffe6e
            //   8b733c               | mov                 esi, dword ptr [ebx + 0x3c]

        $sequence_2 = { 5f 0590040000 5e c9 c3 55 }
            // n = 6, score = 600
            //   5f                   | pop                 edi
            //   0590040000           | add                 eax, 0x490
            //   5e                   | pop                 esi
            //   c9                   | leave               
            //   c3                   | ret                 
            //   55                   | push                ebp

        $sequence_3 = { 81ec88000000 48 8d0dd5160000 ff15???????? }
            // n = 4, score = 600
            //   81ec88000000         | sub                 esp, 0x88
            //   48                   | dec                 eax
            //   8d0dd5160000         | lea                 ecx, [0x16d5]
            //   ff15????????         |                     

        $sequence_4 = { 894de4 894de0 894dec 894ddc 894de8 e8???????? 8bd8 }
            // n = 7, score = 600
            //   894de4               | mov                 dword ptr [ebp - 0x1c], ecx
            //   894de0               | mov                 dword ptr [ebp - 0x20], ecx
            //   894dec               | mov                 dword ptr [ebp - 0x14], ecx
            //   894ddc               | mov                 dword ptr [ebp - 0x24], ecx
            //   894de8               | mov                 dword ptr [ebp - 0x18], ecx
            //   e8????????           |                     
            //   8bd8                 | mov                 ebx, eax

        $sequence_5 = { 394de4 7414 394de0 740f 394dec }
            // n = 5, score = 600
            //   394de4               | cmp                 dword ptr [ebp - 0x1c], ecx
            //   7414                 | je                  0x16
            //   394de0               | cmp                 dword ptr [ebp - 0x20], ecx
            //   740f                 | je                  0x11
            //   394dec               | cmp                 dword ptr [ebp - 0x14], ecx

        $sequence_6 = { 0f875fffffff eb71 81ff5d68fa3c 756f 8b4810 8b413c 8b440878 }
            // n = 7, score = 600
            //   0f875fffffff         | ja                  0xffffff65
            //   eb71                 | jmp                 0x73
            //   81ff5d68fa3c         | cmp                 edi, 0x3cfa685d
            //   756f                 | jne                 0x71
            //   8b4810               | mov                 ecx, dword ptr [eax + 0x10]
            //   8b413c               | mov                 eax, dword ptr [ecx + 0x3c]
            //   8b440878             | mov                 eax, dword ptr [eax + ecx + 0x78]

        $sequence_7 = { eb02 8bce c6040100 8bc6 5b c3 6a08 }
            // n = 7, score = 600
            //   eb02                 | jmp                 4
            //   8bce                 | mov                 ecx, esi
            //   c6040100             | mov                 byte ptr [ecx + eax], 0
            //   8bc6                 | mov                 eax, esi
            //   5b                   | pop                 ebx
            //   c3                   | ret                 
            //   6a08                 | push                8

        $sequence_8 = { 41 ffd3 85ff 7405 83ff03 7537 }
            // n = 6, score = 600
            //   41                   | inc                 ecx
            //   ffd3                 | call                ebx
            //   85ff                 | test                edi, edi
            //   7405                 | je                  7
            //   83ff03               | cmp                 edi, 3
            //   7537                 | jne                 0x39

        $sequence_9 = { 75b0 035204 8b4204 85c0 7594 8b7628 0375f8 }
            // n = 7, score = 600
            //   75b0                 | jne                 0xffffffb2
            //   035204               | add                 edx, dword ptr [edx + 4]
            //   8b4204               | mov                 eax, dword ptr [edx + 4]
            //   85c0                 | test                eax, eax
            //   7594                 | jne                 0xffffff96
            //   8b7628               | mov                 esi, dword ptr [esi + 0x28]
            //   0375f8               | add                 esi, dword ptr [ebp - 8]

    condition:
        7 of them and filesize < 540672
}
[TLP:WHITE] win_xxmm_w0   (20180301 | Detects malware / hacktool sample from Bronze Butler incident)
rule win_xxmm_w0 {
    meta:
        author = "Florian Roth"
        description = "Detects malware / hacktool sample from Bronze Butler incident"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.xxmm"
        malpedia_version = "20180301"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:
        $x1 = "\\Release\\ReflectivLoader.pdb" ascii
        $x3 = "\\Projects\\xxmm2\\Release\\" ascii
        $x5 = "http://127.0.0.1/phptunnel.php" fullword ascii

        $s1 = "xxmm2.exe" fullword ascii
        $s2 = "\\AvUpdate.exe" fullword wide
        $s3 = "stdapi_fs_file_download" fullword ascii
        $s4 = "stdapi_syncshell_open" fullword ascii
        $s5 = "stdapi_execute_sleep" fullword ascii
        $s6 = "stdapi_syncshell_kill" fullword ascii
    condition:
        1 of ($x*) or
        4 of them
}
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