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 (20220516 | Detects win.xxmm.)
rule win_xxmm_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        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 = "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 = { 8b45f0 03c6 3b45ec 7733 }
            // n = 4, score = 600
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]
            //   03c6                 | add                 eax, esi
            //   3b45ec               | cmp                 eax, dword ptr [ebp - 0x14]
            //   7733                 | ja                  0x35

        $sequence_1 = { 837de810 8b45d4 7303 8d45d4 ff7520 }
            // n = 5, score = 600
            //   837de810             | cmp                 dword ptr [ebp - 0x18], 0x10
            //   8b45d4               | mov                 eax, dword ptr [ebp - 0x2c]
            //   7303                 | jae                 5
            //   8d45d4               | lea                 eax, [ebp - 0x2c]
            //   ff7520               | push                dword ptr [ebp + 0x20]

        $sequence_2 = { 740f 394dec 740a 394de8 7405 }
            // n = 5, score = 600
            //   740f                 | je                  0x11
            //   394dec               | cmp                 dword ptr [ebp - 0x14], ecx
            //   740a                 | je                  0xc
            //   394de8               | cmp                 dword ptr [ebp - 0x18], ecx
            //   7405                 | je                  7

        $sequence_3 = { 0fb74614 8d7c302c 0fb74606 8945e8 85c0 }
            // n = 5, score = 600
            //   0fb74614             | movzx               eax, word ptr [esi + 0x14]
            //   8d7c302c             | lea                 edi, [eax + esi + 0x2c]
            //   0fb74606             | movzx               eax, word ptr [esi + 6]
            //   8945e8               | mov                 dword ptr [ebp - 0x18], eax
            //   85c0                 | test                eax, eax

        $sequence_4 = { ff7650 6a00 ff55ec ff7650 8bf8 57 897df8 }
            // n = 7, score = 600
            //   ff7650               | push                dword ptr [esi + 0x50]
            //   6a00                 | push                0
            //   ff55ec               | call                dword ptr [ebp - 0x14]
            //   ff7650               | push                dword ptr [esi + 0x50]
            //   8bf8                 | mov                 edi, eax
            //   57                   | push                edi
            //   897df8               | mov                 dword ptr [ebp - 8], edi

        $sequence_5 = { 8945f8 8945f4 8bfb ab }
            // n = 4, score = 600
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   8bfb                 | mov                 edi, ebx
            //   ab                   | stosd               dword ptr es:[edi], eax

        $sequence_6 = { 895d08 47 81e7ff000080 7908 4f 81cf00ffffff }
            // n = 6, score = 600
            //   895d08               | mov                 dword ptr [ebp + 8], ebx
            //   47                   | inc                 edi
            //   81e7ff000080         | and                 edi, 0x800000ff
            //   7908                 | jns                 0xa
            //   4f                   | dec                 edi
            //   81cf00ffffff         | or                  edi, 0xffffff00

        $sequence_7 = { 23c3 013c08 eb1e 6683ff01 7508 }
            // n = 5, score = 600
            //   23c3                 | and                 eax, ebx
            //   013c08               | add                 dword ptr [eax + ecx], edi
            //   eb1e                 | jmp                 0x20
            //   6683ff01             | cmp                 di, 1
            //   7508                 | jne                 0xa

        $sequence_8 = { 81fb54caaf91 7408 81fbf232f60e 7558 8b45f8 0fb700 8b540e1c }
            // n = 7, score = 600
            //   81fb54caaf91         | cmp                 ebx, 0x91afca54
            //   7408                 | je                  0xa
            //   81fbf232f60e         | cmp                 ebx, 0xef632f2
            //   7558                 | jne                 0x5a
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   0fb700               | movzx               eax, word ptr [eax]
            //   8b540e1c             | mov                 edx, dword ptr [esi + ecx + 0x1c]

        $sequence_9 = { 8b0a 034df8 83c0f8 d1e8 }
            // n = 4, score = 600
            //   8b0a                 | mov                 ecx, dword ptr [edx]
            //   034df8               | add                 ecx, dword ptr [ebp - 8]
            //   83c0f8               | add                 eax, -8
            //   d1e8                 | shr                 eax, 1

    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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