SYMBOLCOMMON_NAMEaka. SYNONYMS
win.crosswalk (Back to overview)

CROSSWALK

aka: ProxIP, Motnug, TOMMYGUN

Actor(s): APT41


According to FireEye, CROSSWALK is a skeletal, modular backdoor capable of system survey and adding modules in response to C&C replies.

References
2021-09-09SymantecThreat Hunter Team
@online{team:20210909:grayfly:60c5478, author = {Threat Hunter Team}, title = {{Grayfly: Chinese Threat Actor Uses Newly-discovered Sidewalk Malware}}, date = {2021-09-09}, organization = {Symantec}, url = {https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/grayfly-china-sidewalk-malware}, language = {English}, urldate = {2021-09-10} } Grayfly: Chinese Threat Actor Uses Newly-discovered Sidewalk Malware
CROSSWALK MimiKatz SideWalk
2021-08-24ESET ResearchThibaut Passilly, Mathieu Tartare
@online{passilly:20210824:sidewalk:75d39db, author = {Thibaut Passilly and Mathieu Tartare}, title = {{The SideWalk may be as dangerous as the CROSSWALK}}, date = {2021-08-24}, organization = {ESET Research}, url = {https://www.welivesecurity.com/2021/08/24/sidewalk-may-be-as-dangerous-as-crosswalk/}, language = {English}, urldate = {2021-08-31} } The SideWalk may be as dangerous as the CROSSWALK
Cobalt Strike CROSSWALK SideWalk
2021-01-15The Hacker NewsRavie Lakshmaman
@online{lakshmaman:20210115:researchers:d524572, author = {Ravie Lakshmaman}, title = {{Researchers Disclose Undocumented Chinese Malware Used in Recent Attacks}}, date = {2021-01-15}, organization = {The Hacker News}, url = {https://thehackernews.com/2021/01/researchers-disclose-undocumented.html}, language = {English}, urldate = {2021-06-29} } Researchers Disclose Undocumented Chinese Malware Used in Recent Attacks
CROSSWALK
2021-01-14PTSecurityPT ESC Threat Intelligence
@online{intelligence:20210114:higaisa:4676ec7, author = {PT ESC Threat Intelligence}, title = {{Higaisa or Winnti? APT41 backdoors, old and new}}, date = {2021-01-14}, organization = {PTSecurity}, url = {https://www.ptsecurity.com/ww-en/analytics/pt-esc-threat-intelligence/higaisa-or-winnti-apt-41-backdoors-old-and-new/}, language = {English}, urldate = {2021-02-09} } Higaisa or Winnti? APT41 backdoors, old and new
Cobalt Strike CROSSWALK FunnySwitch PlugX ShadowPad
2020-11-13Youtube (The Standoff)Alexey Zakharov, Positive Technologies
@online{zakharov:20201113:ff202eng:1d1222c, author = {Alexey Zakharov and Positive Technologies}, title = {{FF_202_Eng - From old Higaisa samples to new Winnti backdoors: The story of one research}}, date = {2020-11-13}, organization = {Youtube (The Standoff)}, url = {https://www.youtube.com/watch?v=8x-pGlWpIYI}, language = {English}, urldate = {2020-11-23} } FF_202_Eng - From old Higaisa samples to new Winnti backdoors: The story of one research
CROSSWALK Unidentified 076 (Higaisa LNK to Shellcode)
2020-11-03Kaspersky LabsGReAT
@online{great:20201103:trends:febc159, author = {GReAT}, title = {{APT trends report Q3 2020}}, date = {2020-11-03}, organization = {Kaspersky Labs}, url = {https://securelist.com/apt-trends-report-q3-2020/99204/}, language = {English}, urldate = {2020-11-04} } APT trends report Q3 2020
WellMail EVILNUM Janicab Poet RAT AsyncRAT Ave Maria Cobalt Strike Crimson RAT CROSSWALK Dtrack LODEINFO MoriAgent Okrum PlugX poisonplug Rover ShadowPad SoreFang Winnti
2020-09-18SymantecThreat Hunter Team
@online{team:20200918:apt41:363daa8, author = {Threat Hunter Team}, title = {{APT41: Indictments Put Chinese Espionage Group in the Spotlight}}, date = {2020-09-18}, organization = {Symantec}, url = {https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/apt41-indictments-china-espionage}, language = {English}, urldate = {2020-09-23} } APT41: Indictments Put Chinese Espionage Group in the Spotlight
CROSSWALK PlugX poisonplug ShadowPad Winnti
2020-07-29ESET Researchwelivesecurity
@techreport{welivesecurity:20200729:threat:496355c, author = {welivesecurity}, title = {{THREAT REPORT Q2 2020}}, date = {2020-07-29}, institution = {ESET Research}, url = {https://www.welivesecurity.com/wp-content/uploads/2020/07/ESET_Threat_Report_Q22020.pdf}, language = {English}, urldate = {2020-07-30} } THREAT REPORT Q2 2020
DEFENSOR ID HiddenAd Bundlore Pirrit Agent.BTZ Cerber ClipBanker CROSSWALK Cryptowall CTB Locker DanaBot Dharma Formbook Gandcrab Grandoreiro Houdini ISFB LockBit Locky Mailto Maze Microcin Nemty NjRAT Phobos PlugX Pony REvil Socelars STOP Tinba TrickBot WannaCryptor
2020-07-21YouTube ( OPCDE with Matt Suiche)Mohamad Mokbel
@online{mokbel:20200721:vopcde:26d48d0, author = {Mohamad Mokbel}, title = {{vOPCDE #9 - A Journey into Malware HTTP Communication Channels Spectacles (Mohamad Mokbel)}}, date = {2020-07-21}, organization = {YouTube ( OPCDE with Matt Suiche)}, url = {https://www.youtube.com/watch?v=FttiysUZmDw}, language = {English}, urldate = {2021-10-24} } vOPCDE #9 - A Journey into Malware HTTP Communication Channels Spectacles (Mohamad Mokbel)
Alureon Aytoke Cobra Carbon System CROSSWALK danbot ProtonBot Silence
2019-09-30vmwareScott Knight
@online{knight:20190930:cb:a21cf30, author = {Scott Knight}, title = {{CB Threat Analysis Unit: Technical Analysis of “Crosswalk”}}, date = {2019-09-30}, organization = {vmware}, url = {https://www.carbonblack.com/2019/09/30/cb-threat-analysis-unit-technical-analysis-of-crosswalk/}, language = {English}, urldate = {2020-04-21} } CB Threat Analysis Unit: Technical Analysis of “Crosswalk”
CROSSWALK
2019-08-09FireEyeFireEye
@online{fireeye:20190809:double:40f736e, author = {FireEye}, title = {{Double Dragon APT41, a dual espionage and cyber crime operation}}, date = {2019-08-09}, organization = {FireEye}, url = {https://content.fireeye.com/apt-41/rpt-apt41/}, language = {English}, urldate = {2019-12-18} } Double Dragon APT41, a dual espionage and cyber crime operation
CLASSFON crackshot CROSSWALK GEARSHIFT HIGHNOON HIGHNOON.BIN JUMPALL poisonplug Winnti
2018-12-24Twitter (@MrDanPerez)Dan Perez
@online{perez:20181224:hashes:9a4fc8c, author = {Dan Perez}, title = {{Tweet on hashes for CROSSWALK}}, date = {2018-12-24}, organization = {Twitter (@MrDanPerez)}, url = {https://twitter.com/MrDanPerez/status/1159459082534825986}, language = {English}, urldate = {2019-11-27} } Tweet on hashes for CROSSWALK
CROSSWALK
Yara Rules
[TLP:WHITE] win_crosswalk_auto (20220516 | Detects win.crosswalk.)
rule win_crosswalk_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.crosswalk."
        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.crosswalk"
        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 = { 33f6 8d6e20 8bcd e8???????? }
            // n = 4, score = 1300
            //   33f6                 | movsx               eax, byte ptr [eax]
            //   8d6e20               | dec                 ecx
            //   8bcd                 | inc                 eax
            //   e8????????           |                     

        $sequence_1 = { 458bc6 33d2 488bc8 e8???????? 4533c9 4533c0 }
            // n = 6, score = 1300
            //   458bc6               | add                 edx, eax
            //   33d2                 | imul                eax, edx, 0xe89
            //   488bc8               | inc                 ecx
            //   e8????????           |                     
            //   4533c9               | mov                 eax, eax
            //   4533c0               | imul                ecx

        $sequence_2 = { 4883ec28 4885c9 7402 ffd1 }
            // n = 4, score = 1300
            //   4883ec28             | dec                 ecx
            //   4885c9               | inc                 eax
            //   7402                 | ror                 edx, cl
            //   ffd1                 | inc                 ecx

        $sequence_3 = { 41b88d56e68c 418bc0 f7e9 03d1 c1fa0b 8bc2 }
            // n = 6, score = 1300
            //   41b88d56e68c         | dec                 ecx
            //   418bc0               | inc                 eax
            //   f7e9                 | ror                 edx, cl
            //   03d1                 | add                 edx, eax
            //   c1fa0b               | inc                 ecx
            //   8bc2                 | sub                 edi, 1

        $sequence_4 = { 458d7ee0 418bd7 ff15???????? 4821742420 }
            // n = 4, score = 1300
            //   458d7ee0             | xor                 edx, edx
            //   418bd7               | inc                 ecx
            //   ff15????????         |                     
            //   4821742420           | movsx               eax, byte ptr [eax]

        $sequence_5 = { c1fa0b 8bc2 c1e81f 03d0 69c2890e0000 }
            // n = 5, score = 1300
            //   c1fa0b               | inc                 ecx
            //   8bc2                 | mov                 eax, 0x8ce6568d
            //   c1e81f               | inc                 ecx
            //   03d0                 | mov                 eax, eax
            //   69c2890e0000         | imul                ecx

        $sequence_6 = { ff15???????? 448bf0 4533c9 4533c0 }
            // n = 4, score = 1300
            //   ff15????????         |                     
            //   448bf0               | inc                 esp
            //   4533c9               | mov                 esi, eax
            //   4533c0               | inc                 ebp

        $sequence_7 = { 33d2 410fbe00 49ffc0 d3ca 03d0 4183ef01 }
            // n = 6, score = 1300
            //   33d2                 | xor                 ecx, ecx
            //   410fbe00             | inc                 ebp
            //   49ffc0               | xor                 eax, eax
            //   d3ca                 | xor                 edx, edx
            //   03d0                 | inc                 ecx
            //   4183ef01             | movsx               eax, byte ptr [eax]

        $sequence_8 = { 897de4 8365fc00 8b049d808e4100 8b4de0 }
            // n = 4, score = 200
            //   897de4               | mov                 dword ptr [ebp - 0x1c], edi
            //   8365fc00             | and                 dword ptr [ebp - 4], 0
            //   8b049d808e4100       | mov                 eax, dword ptr [ebx*4 + 0x418e80]
            //   8b4de0               | mov                 ecx, dword ptr [ebp - 0x20]

        $sequence_9 = { 8b0485808e4100 33db 8b7508 57 8b440818 8b4d10 8bf9 }
            // n = 7, score = 200
            //   8b0485808e4100       | mov                 eax, dword ptr [eax*4 + 0x418e80]
            //   33db                 | xor                 ebx, ebx
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   57                   | push                edi
            //   8b440818             | mov                 eax, dword ptr [eax + ecx + 0x18]
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]
            //   8bf9                 | mov                 edi, ecx

        $sequence_10 = { 8b45fc 817848f0844100 7409 ff7048 }
            // n = 4, score = 200
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   817848f0844100       | cmp                 dword ptr [eax + 0x48], 0x4184f0
            //   7409                 | je                  0xb
            //   ff7048               | push                dword ptr [eax + 0x48]

        $sequence_11 = { 89861c020000 8b45e0 8d4e0c 6a06 8d90fc814100 }
            // n = 5, score = 200
            //   89861c020000         | mov                 dword ptr [esi + 0x21c], eax
            //   8b45e0               | mov                 eax, dword ptr [ebp - 0x20]
            //   8d4e0c               | lea                 ecx, [esi + 0xc]
            //   6a06                 | push                6
            //   8d90fc814100         | lea                 edx, [eax + 0x4181fc]

        $sequence_12 = { 83c404 8bd8 8d45fc 6a00 50 6a0c }
            // n = 6, score = 200
            //   83c404               | add                 esp, 4
            //   8bd8                 | mov                 ebx, eax
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   6a0c                 | push                0xc

        $sequence_13 = { 8bde 895dd8 8365fc00 8b45e4 8b0485808e4100 8b4de0 f644082801 }
            // n = 7, score = 200
            //   8bde                 | mov                 ebx, esi
            //   895dd8               | mov                 dword ptr [ebp - 0x28], ebx
            //   8365fc00             | and                 dword ptr [ebp - 4], 0
            //   8b45e4               | mov                 eax, dword ptr [ebp - 0x1c]
            //   8b0485808e4100       | mov                 eax, dword ptr [eax*4 + 0x418e80]
            //   8b4de0               | mov                 ecx, dword ptr [ebp - 0x20]
            //   f644082801           | test                byte ptr [eax + ecx + 0x28], 1

        $sequence_14 = { 7810 3de4000000 7309 8b04c5502e4100 5d c3 33c0 }
            // n = 7, score = 200
            //   7810                 | js                  0x12
            //   3de4000000           | cmp                 eax, 0xe4
            //   7309                 | jae                 0xb
            //   8b04c5502e4100       | mov                 eax, dword ptr [eax*8 + 0x412e50]
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   33c0                 | xor                 eax, eax

        $sequence_15 = { eb17 81fa00010000 7313 8a87f4814100 08441619 42 }
            // n = 6, score = 200
            //   eb17                 | jmp                 0x19
            //   81fa00010000         | cmp                 edx, 0x100
            //   7313                 | jae                 0x15
            //   8a87f4814100         | mov                 al, byte ptr [edi + 0x4181f4]
            //   08441619             | or                  byte ptr [esi + edx + 0x19], al
            //   42                   | inc                 edx

    condition:
        7 of them and filesize < 286720
}
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