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 (20201023 | autogenerated rule brought to you by yara-signator)
rule win_xxmm_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.xxmm"
        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 = { 57 33c0 33ff 663bc3 731e 0fb7c7 6bc028 }
            // n = 7, score = 600
            //   57                   | push                edi
            //   33c0                 | xor                 eax, eax
            //   33ff                 | xor                 edi, edi
            //   663bc3               | cmp                 ax, bx
            //   731e                 | jae                 0x20
            //   0fb7c7               | movzx               eax, di
            //   6bc028               | imul                eax, eax, 0x28

        $sequence_1 = { 8d440108 894308 c745f401000000 8b45f0 0145f8 03f0 }
            // n = 6, score = 600
            //   8d440108             | lea                 eax, [ecx + eax + 8]
            //   894308               | mov                 dword ptr [ebx + 8], eax
            //   c745f401000000       | mov                 dword ptr [ebp - 0xc], 1
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]
            //   0145f8               | add                 dword ptr [ebp - 8], eax
            //   03f0                 | add                 esi, eax

        $sequence_2 = { 397d08 0f84bc000000 397d10 0f84b3000000 3bf7 0f84ab000000 6800010000 }
            // n = 7, score = 600
            //   397d08               | cmp                 dword ptr [ebp + 8], edi
            //   0f84bc000000         | je                  0xc2
            //   397d10               | cmp                 dword ptr [ebp + 0x10], edi
            //   0f84b3000000         | je                  0xb9
            //   3bf7                 | cmp                 esi, edi
            //   0f84ab000000         | je                  0xb1
            //   6800010000           | push                0x100

        $sequence_3 = { 8b30 ff4df4 8bcf e8???????? 03c7 68???????? }
            // n = 6, score = 600
            //   8b30                 | mov                 esi, dword ptr [eax]
            //   ff4df4               | dec                 dword ptr [ebp - 0xc]
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     
            //   03c7                 | add                 eax, edi
            //   68????????           |                     

        $sequence_4 = { ff75f8 ffd6 5f 8bc6 }
            // n = 4, score = 600
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ffd6                 | call                esi
            //   5f                   | pop                 edi
            //   8bc6                 | mov                 eax, esi

        $sequence_5 = { 7424 8b00 85c0 791e 8b4a3c }
            // n = 5, score = 600
            //   7424                 | je                  0x26
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   85c0                 | test                eax, eax
            //   791e                 | jns                 0x20
            //   8b4a3c               | mov                 ecx, dword ptr [edx + 0x3c]

        $sequence_6 = { 38591d 752a 8b5108 385a1d 7518 eb02 }
            // n = 6, score = 600
            //   38591d               | cmp                 byte ptr [ecx + 0x1d], bl
            //   752a                 | jne                 0x2c
            //   8b5108               | mov                 edx, dword ptr [ecx + 8]
            //   385a1d               | cmp                 byte ptr [edx + 0x1d], bl
            //   7518                 | jne                 0x1a
            //   eb02                 | jmp                 4

        $sequence_7 = { 8a11 88140f 41 48 }
            // n = 4, score = 600
            //   8a11                 | mov                 dl, byte ptr [ecx]
            //   88140f               | mov                 byte ptr [edi + ecx], dl
            //   41                   | inc                 ecx
            //   48                   | dec                 eax

        $sequence_8 = { 7303 8d45d4 ff7520 51 }
            // n = 4, score = 600
            //   7303                 | jae                 5
            //   8d45d4               | lea                 eax, [ebp - 0x2c]
            //   ff7520               | push                dword ptr [ebp + 0x20]
            //   51                   | push                ecx

        $sequence_9 = { 0fb74614 8d7c302c 0fb74606 8945e8 85c0 7429 }
            // n = 6, 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
            //   7429                 | je                  0x2b

    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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