Joe Sandbox Cloud Basic Analysis Report
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Linux Analysis Report
Nyx4r.arm6.elf

Overview

General Information

Sample name:Nyx4r.arm6.elf
Analysis ID:1644248
MD5:15687e7cab222acf949beea580d2e4e8
SHA1:fbb335e4cdc206f5a37b996c31c6b272366be87c
SHA256:4af2b07709c57ba97319963404d821558923a0539adbc423f9df7545d98e52d4
Tags:elfMiraiuser-abuse_ch
Infos:

Detection

Okiru
Score:64
Range:0 - 100

Signatures

Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
Yara detected Okiru
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable
Sample has stripped symbol table
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

RansomwareSpreadingPhishingBankerTrojan / BotAdwareSpywareExploiterEvaderMinercleansuspiciousmalicious

General Information

Joe Sandbox version:42.0.0 Malachite
Analysis ID:1644248
Start date and time:2025-03-20 13:41:12 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 22s
Hypervisor based Inspection enabled:false
Report type:full
Cookbook file name:defaultlinuxfilecookbook.jbs
Analysis system description:Ubuntu Linux 20.04 x64 (Kernel 5.4.0-72, Firefox 91.0, Evince Document Viewer 3.36.10, LibreOffice 6.4.7.2, OpenJDK 11.0.11)
Analysis Mode:default
Sample name:Nyx4r.arm6.elf
Detection:MAL
Classification:mal64.troj.linELF@0/0@2/0

Runtime Messages

Command:/tmp/Nyx4r.arm6.elf
PID:5529
Exit Code:139
Exit Code Info:SIGSEGV (11) Segmentation fault invalid memory reference
Killed:False
Standard Output:

Standard Error:qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Process Tree

  • system is lnxubuntu20
  • Nyx4r.arm6.elf (PID: 5529, Parent: 5448, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/Nyx4r.arm6.elf
  • cleanup

Yara Signatures

Initial Sample

SourceRuleDescriptionAuthorStrings
Nyx4r.arm6.elfJoeSecurity_OkiruYara detected OkiruJoe Security

    Memory Dumps

    SourceRuleDescriptionAuthorStrings
    5529.1.00007f9234017000.00007f923402b000.r-x.sdmpJoeSecurity_OkiruYara detected OkiruJoe Security
      Process Memory Space: Nyx4r.arm6.elf PID: 5529JoeSecurity_OkiruYara detected OkiruJoe Security

        Suricata Signatures

        ⊘No Suricata rule has matched

        Joe Sandbox Signatures

        • • AV Detection
        • • Networking
        • • System Summary
        • • Malware Analysis System Evasion
        • • Stealing of Sensitive Information
        • • Remote Access Functionality

        Click to jump to signature section

        Show All Signature Results

        AV Detection

        barindex
        Source: Nyx4r.arm6.elfAvira: detected
        Source: Nyx4r.arm6.elfVirustotal: Detection: 58%Perma Link
        Source: Nyx4r.arm6.elfReversingLabs: Detection: 63%
        Source: unknownUDP traffic detected without corresponding DNS query: 1.1.1.1
        Source: unknownUDP traffic detected without corresponding DNS query: 1.1.1.1
        Source: global trafficDNS traffic detected: DNS query: daisy.ubuntu.com
        Source: Initial sampleString containing 'busybox' found: /bin/busybox
        Source: Initial sampleString containing 'busybox' found: var/Challengeapp/hi3511gmDVRiboxusr/dvr_main _8182T_1108mnt/mtd/app/guivar/Kylinl0 c/udevdanko-app/ankosample _8182T_1104var/tmp/soniahicorestm_hi3511_dvr/bin/busybox/usr/lib/systemd/systemd/usr/libexec/openssh/sftp-serverusr/shellmnt/sys/bin/boot/media/srv/var/run/sbin/lib/etc/dev/home/Davincitelnetsshwatchdog/var/spool/var/SofiasshdbashhttpdtelnetddropbearropbearencodersystemNyx4ar/root/dvr_gui//root/dvr_app//anko-app//opt/157.245.200.182
        Source: ELF static info symbol of initial sample.symtab present: no
        Source: classification engineClassification label: mal64.troj.linELF@0/0@2/0
        Source: /tmp/Nyx4r.arm6.elf (PID: 5529)Queries kernel information via 'uname': Jump to behavior
        Source: Nyx4r.arm6.elf, 5529.1.00005578a94ba000.00005578a95e8000.rw-.sdmpBinary or memory string: xU!/etc/qemu-binfmt/arm
        Source: Nyx4r.arm6.elf, 5529.1.00007ffe57d27000.00007ffe57d48000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/Nyx4r.arm6.elfSUDO_USER=saturninoPATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/binDISPLAY=:1.0XAUTHORITY=/run/user/1000/gdm/XauthoritySUDO_UID=1000TERM=xterm-256colorCOLORTERM=truecolorLOGNAME=rootUSER=rootLANG=en_US.UTF-8SUDO_COMMAND=/bin/bashHOME=/rootMAIL=/var/mail/rootSUDO_GID=1000SHELL=/bin/bash/tmp/Nyx4r.arm6.elf
        Source: Nyx4r.arm6.elf, 5529.1.00005578a94ba000.00005578a95e8000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
        Source: Nyx4r.arm6.elf, 5529.1.00007ffe57d27000.00007ffe57d48000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
        Source: Nyx4r.arm6.elf, 5529.1.00007ffe57d27000.00007ffe57d48000.rw-.sdmpBinary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

        Stealing of Sensitive Information

        barindex
        Source: Yara matchFile source: Nyx4r.arm6.elf, type: SAMPLE
        Source: Yara matchFile source: 5529.1.00007f9234017000.00007f923402b000.r-x.sdmp, type: MEMORY
        Source: Yara matchFile source: Process Memory Space: Nyx4r.arm6.elf PID: 5529, type: MEMORYSTR

        Remote Access Functionality

        barindex
        Source: Yara matchFile source: Nyx4r.arm6.elf, type: SAMPLE
        Source: Yara matchFile source: 5529.1.00007f9234017000.00007f923402b000.r-x.sdmp, type: MEMORY
        Source: Yara matchFile source: Process Memory Space: Nyx4r.arm6.elf PID: 5529, type: MEMORYSTR

        Mitre Att&ck Matrix

        ReconnaissanceResource DevelopmentInitial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionCommand and ControlExfiltrationImpact
        Gather Victim Identity InformationAcquire InfrastructureValid AccountsWindows Management InstrumentationPath InterceptionPath InterceptionDirect Volume AccessOS Credential Dumping11
        Security Software Discovery        		Remote ServicesData from Local System1
        Non-Application Layer Protocol        		Exfiltration Over Other Network MediumAbuse Accessibility Features
        CredentialsDomainsDefault AccountsScheduled Task/JobBoot or Logon Initialization ScriptsBoot or Logon Initialization ScriptsRootkitLSASS MemoryApplication Window DiscoveryRemote Desktop ProtocolData from Removable Media1
        Application Layer Protocol        		Exfiltration Over BluetoothNetwork Denial of Service

        Malware Configuration

        ⊘No configs have been found

        Behavior Graph

        Hide Legend

        Legend:

        • Process
        • Signature
        • Created File
        • DNS/IP Info
        • Is Dropped
        • Number of created Files
        • Is malicious
        • Internet
        behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1644248 Sample: Nyx4r.arm6.elf Startdate: 20/03/2025 Architecture: LINUX Score: 64 8 daisy.ubuntu.com 2->8 10 Antivirus / Scanner detection for submitted sample 2->10 12 Multi AV Scanner detection for submitted file 2->12 14 Yara detected Okiru 2->14 6 Nyx4r.arm6.elf 2->6         started        signatures3 process4

        Screenshots

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        Thumbnails

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        windows-stand

        Antivirus, Machine Learning and Genetic Malware Detection

        Initial Sample

        SourceDetectionScannerLabelLink
        Nyx4r.arm6.elf59%VirustotalBrowse
        Nyx4r.arm6.elf64%ReversingLabsLinux.Trojan.Mirai
        Nyx4r.arm6.elf100%AviraEXP/ELF.Mirai.Bootnet.o

        Dropped Files

        ⊘No Antivirus matches

        Domains

        ⊘No Antivirus matches

        URLs

        ⊘No Antivirus matches

        Domains and IPs

        Download Network PCAP: filtered – full

        Contacted Domains

        NameIPActiveMaliciousAntivirus DetectionReputation
        daisy.ubuntu.com
        		162.213.35.24
        		truefalse
          		high

          World Map of Contacted IPs

          ⊘No contacted IP infos

          Joe Sandbox View / Context

          IPs

          ⊘No context

          Domains

          MatchAssociated Sample Name / URLSHA 256DetectionThreat NameLinkContext
          daisy.ubuntu.comNyx4r.m68k.elfGet hashmaliciousOkiruBrowse
          • 162.213.35.25
          Nyx4r.arm5.elfGet hashmaliciousOkiruBrowse
          • 162.213.35.24
          Nyx4r.x86.elfGet hashmaliciousOkiruBrowse
          • 162.213.35.25
          hoho.mips.elfGet hashmaliciousUnknownBrowse
          • 162.213.35.24
          hoho.i486.elfGet hashmaliciousUnknownBrowse
          • 162.213.35.25
          arm7.elfGet hashmaliciousUnknownBrowse
          • 162.213.35.25
          arm6.elfGet hashmaliciousUnknownBrowse
          • 162.213.35.24
          mpsl.elfGet hashmaliciousUnknownBrowse
          • 162.213.35.24
          x86.elfGet hashmaliciousUnknownBrowse
          • 162.213.35.25
          arm.elfGet hashmaliciousUnknownBrowse
          • 162.213.35.24

          ASNs

          ⊘No context

          JA3 Fingerprints

          ⊘No context

          Dropped Files

          ⊘No context

          Created / dropped Files

          ⊘No created / dropped files found

          Static File Info

          General

          File type:ELF 32-bit LSB executable, ARM, EABI4 version 1 (SYSV), statically linked, stripped
          Entropy (8bit):6.09574161044931
          TrID:
          • ELF Executable and Linkable format (generic) (4004/1) 100.00%
          File name:Nyx4r.arm6.elf
          File size:83'272 bytes
          MD5:15687e7cab222acf949beea580d2e4e8
          SHA1:fbb335e4cdc206f5a37b996c31c6b272366be87c
          SHA256:4af2b07709c57ba97319963404d821558923a0539adbc423f9df7545d98e52d4
          SHA512:67a29ee3748bb587cb27f1ae14a4dac6e31c921de14e3ea4fc07c5a89a2fd2b4330f6af8475f10eaceef3bc325dd09316c10fe94a120a1cb81bae8e08ab7591d
          SSDEEP:1536:a1n1HI0qrxI9TS43sw1B0+zAxzOXm1AUd0ey7dafL35MTi8FhrAhBZ+yF51Y8e:otqlwTFzm+gi21Ldia8X8hBZ+yFfHe
          TLSH:06831986B9816B15C6C116BBFE1F008E3313576CE2DE73129C245F6477CB95B0E6BA0A
          File Content Preview:.ELF..............(.....T...4...hC......4. ...(.....................X?..X?...............@...@...@..................Q.td..................................-...L..................@-.,@...0....S..... 0....S.........../..0...0...@..../..B.......@....-.@0....S

          Static ELF Info

          ELF header

          Class:ELF32
          Data:2's complement, little endian
          Version:1 (current)
          Machine:ARM
          Version Number:0x1
          Type:EXEC (Executable file)
          OS/ABI:UNIX - System V
          ABI Version:0
          Entry Point Address:0x8154
          Flags:0x4000002
          ELF Header Size:52
          Program Header Offset:52
          Program Header Size:32
          Number of Program Headers:3
          Section Header Offset:82792
          Section Header Size:40
          Number of Section Headers:12
          Header String Table Index:11

          Sections

          NameTypeAddressOffsetSizeEntSizeFlagsFlags DescriptionLinkInfoAlign
          NULL0x00x00x00x00x0000
          .initPROGBITS0x80940x940x100x00x6AX004
          .textPROGBITS0x80b00xb00x1294c0x00x6AX0016
          .finiPROGBITS0x1a9fc0x129fc0x100x00x6AX004
          .rodataPROGBITS0x1aa100x12a100x15480x00x2A008
          .init_arrayINIT_ARRAY0x240040x140080x40x00x3WA004
          .fini_arrayFINI_ARRAY0x240080x1400c0x40x00x3WA004
          .gotPROGBITS0x240100x140140x780x40x3WA004
          .dataPROGBITS0x240880x1408c0x26c0x00x3WA004
          .bssNOBITS0x242f40x142f80x25a80x00x3WA004
          .ARM.attributesARM_ATTRIBUTES0x00x142f80x100x00x0001
          .shstrtabSTRTAB0x00x143080x5d0x00x0001

          Program Segments

          TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
          LOAD0x00x80000x80000x13f580x13f586.12450x5R E0x8000.init .text .fini .rodata
          LOAD0x140040x240040x240000x2f40xa8983.11010x6RW 0x8000.init_array .fini_array .got .data .bss
          GNU_STACK0x00x00x00x00x00.00000x7RWE0x4

          Network Behavior

          Download Network PCAP: filtered – full

          TimestampSource PortDest PortSource IPDest IP
          Mar 20, 2025 13:42:01.705127954 CET5844153192.168.2.151.1.1.1
          Mar 20, 2025 13:42:01.705183983 CET5255453192.168.2.151.1.1.1
          Mar 20, 2025 13:42:01.802578926 CET53525541.1.1.1192.168.2.15
          Mar 20, 2025 13:42:01.802747965 CET53584411.1.1.1192.168.2.15

          DNS Queries

          TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
          Mar 20, 2025 13:42:01.705127954 CET192.168.2.151.1.1.10xb12bStandard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
          Mar 20, 2025 13:42:01.705183983 CET192.168.2.151.1.1.10x6d54Standard query (0)daisy.ubuntu.com28IN (0x0001)false

          DNS Answers

          TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
          Mar 20, 2025 13:42:01.802747965 CET1.1.1.1192.168.2.150xb12bNo error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false
          Mar 20, 2025 13:42:01.802747965 CET1.1.1.1192.168.2.150xb12bNo error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false

          System Behavior

          General

          Start time (UTC):12:42:00
          Start date (UTC):20/03/2025
          Path:/tmp/Nyx4r.arm6.elf
          Arguments:/tmp/Nyx4r.arm6.elf
          File size:4956856 bytes
          MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

          File Activities

          Process Activities

          System Activities