Joe Sandbox Cloud Basic Analysis Report

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Linux Analysis Report
kBNrex15s8.elf

Overview

General Information

Sample name:kBNrex15s8.elf
renamed because original name is a hash value
Original sample name:c24d81ebf3483fde718d20064d0817ce.elf
Analysis ID:1427867
MD5:c24d81ebf3483fde718d20064d0817ce
SHA1:40842dc0a0ad06b4f04ea1e11dfde1a2106f4b3c
SHA256:d40205245ed1ca9ce3f55730a1cf2afbde414a8ce06a4cfce853657a2a9ee7e2
Tags:32armelfmirai
Infos:

Detection

Score:56
Range:0 - 100
Whitelisted:false

Signatures

Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
Sample has stripped symbol table
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

Analysis Advice

Static ELF header machine description suggests that the sample might not execute correctly on this machine.
Non-zero exit code suggests an error during the execution. Lookup the error code for hints.
Static ELF header machine description suggests that the sample might only run correctly on MIPS or ARM architectures.

General Information

Joe Sandbox version:40.0.0 Tourmaline
Analysis ID:1427867
Start date and time:2024-04-18 09:50:36 +02:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 10m 42s
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:kBNrex15s8.elf
renamed because original name is a hash value
Original Sample Name:c24d81ebf3483fde718d20064d0817ce.elf
Detection:MAL
Classification:mal56.linELF@0/0@2/0
Cookbook Comments:
  • Analysis time extended to 480s due to sleep detection in submitted sample

Runtime Messages

Command:/tmp/kBNrex15s8.elf
PID:5525
Exit Code:255
Exit Code Info:
Killed:False
Standard Output:

Standard Error:/lib/ld-uClibc.so.0: No such file or directory

Process Tree

  • system is lnxubuntu20
  • kBNrex15s8.elf (PID: 5525, Parent: 5449, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/kBNrex15s8.elf
  • cleanup

Yara Signatures

⊘No yara matches

Snort Signatures

⊘No Snort rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Antivirus / Scanner detection for submitted sample
Source: kBNrex15s8.elfAvira: detected
Multi AV Scanner detection for submitted file
Source: kBNrex15s8.elfReversingLabs: Detection: 71%
Source: kBNrex15s8.elfVirustotal: Detection: 61%Perma Link
Source: unknownDNS traffic detected: queries for: daisy.ubuntu.com
Source: ELF static info symbol of initial sample.symtab present: no
Source: classification engineClassification label: mal56.linELF@0/0@2/0
Source: /tmp/kBNrex15s8.elf (PID: 5525)Queries kernel information via 'uname': Jump to behavior
Source: kBNrex15s8.elf, 5525.1.000055d6d3bb9000.000055d6d3ce7000.rw-.sdmpBinary or memory string: U!/etc/qemu-binfmt/arm
Source: kBNrex15s8.elf, 5525.1.00007fff6e4f6000.00007fff6e517000.rw-.sdmpBinary or memory string: qemu: %s: %s
Source: kBNrex15s8.elf, 5525.1.00007fff6e4f6000.00007fff6e517000.rw-.sdmpBinary or memory string: leqemu: %s: %s
Source: kBNrex15s8.elf, 5525.1.000055d6d3bb9000.000055d6d3ce7000.rw-.sdmpBinary or memory string: Urg.qemu.gdb.arm.sys.regs">
Source: kBNrex15s8.elf, 5525.1.000055d6d3bb9000.000055d6d3ce7000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: kBNrex15s8.elf, 5525.1.00007fff6e4f6000.00007fff6e517000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: kBNrex15s8.elf, 5525.1.00007fff6e4f6000.00007fff6e517000.rw-.sdmpBinary or memory string: hx86_64/usr/bin/qemu-arm/tmp/kBNrex15s8.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/kBNrex15s8.elf
Source: kBNrex15s8.elf, 5525.1.000055d6d3bb9000.000055d6d3ce7000.rw-.sdmpBinary or memory string: rg.qemu.gdb.arm.sys.regs">

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

Screenshots

Thumbnails

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


windows-stand

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

SourceDetectionScannerLabelLink
kBNrex15s8.elf71%ReversingLabsLinux.Trojan.Mirai
kBNrex15s8.elf61%VirustotalBrowse
kBNrex15s8.elf100%AviraEXP/ELF.Mirai.T

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Contacted Domains

NameIPActiveMaliciousAntivirus DetectionReputation
daisy.ubuntu.com
162.213.35.25
truefalse
    		high

    World Map of Contacted IPs

    ⊘No contacted IP infos

    Joe Sandbox View / Context

    IPs

    ⊘No context

    Domains

    ⊘No context

    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, version 1 (ARM), dynamically linked, interpreter /lib/ld-uClibc.so.0, stripped
    Entropy (8bit):5.940035455132328
    TrID:
    • ELF Executable and Linkable format (generic) (4004/1) 100.00%
    File name:kBNrex15s8.elf
    File size:50'540 bytes
    MD5:c24d81ebf3483fde718d20064d0817ce
    SHA1:40842dc0a0ad06b4f04ea1e11dfde1a2106f4b3c
    SHA256:d40205245ed1ca9ce3f55730a1cf2afbde414a8ce06a4cfce853657a2a9ee7e2
    SHA512:ae0a4f9090e371f19e2a07545c902cafecee91007dda4a83cba087f1a3c65705b85a1b84929d90f36548515a96ffc59067ce351dd59cb5bb7dd76f1556a8ce72
    SSDEEP:1536:9I6mvHvT8kHTwOIjMxA0ouH/zY4XsAlDFZ:q6oHvT8kAMzkqDF
    TLSH:8333C5A178916A2BC2E0137FF9AE618D336067A8D1CF322BC9111F15B7C562F0DA7B51
    File Content Preview:.ELF...a..........(.........4...........4. ...(.........4...4...4...................................................................................................................................................Q.td............................/lib/ld-uCl

    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:ARM - ABI
    ABI Version:0
    Entry Point Address:0x8dfc
    Flags:0x2
    ELF Header Size:52
    Program Header Offset:52
    Program Header Size:32
    Number of Program Headers:6
    Section Header Offset:49820
    Section Header Size:40
    Number of Section Headers:18
    Header String Table Index:17

    Sections

    NameTypeAddressOffsetSizeEntSizeFlagsFlags DescriptionLinkInfoAlign
    NULL0x00x00x00x00x0000
    .interpPROGBITS0x80f40xf40x140x00x2A001
    .hashHASH0x81080x1080x2240x40x2A304
    .dynsymDYNSYM0x832c0x32c0x4400x100x2A414
    .dynstrSTRTAB0x876c0x76c0x2280x00x2A001
    .rel.pltREL0x89940x9940x1580x80x2A374
    .initPROGBITS0x8aec0xaec0x180x00x6AX004
    .pltPROGBITS0x8b040xb040x2180x40x6AX004
    .textPROGBITS0x8d1c0xd1c0xa5300x00x6AX004
    .finiPROGBITS0x1324c0xb24c0x140x00x6AX004
    .rodataPROGBITS0x132600xb2600xe400x00x2A004
    .ctorsPROGBITS0x1c0a40xc0a40x80x00x3WA004
    .dtorsPROGBITS0x1c0ac0xc0ac0x80x00x3WA004
    .dynamicDYNAMIC0x1c0b80xc0b80x980x80x3WA404
    .gotPROGBITS0x1c1500xc1500xb80x40x3WA004
    .dataPROGBITS0x1c2080xc2080x200x00x3WA004
    .bssNOBITS0x1c2280xc2280x1480x00x3WA004
    .shstrtabSTRTAB0x00xc2280x730x00x0001

    Program Segments

    TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
    PHDR0x340x80340x80340xc00xc02.23370x5R E0x4
    INTERP0xf40x80f40x80f40x140x143.68420x4R 0x1/lib/ld-uClibc.so.0.interp
    LOAD0x00x80000x80000xc0a00xc0a05.97420x5R E0x8000.interp .hash .dynsym .dynstr .rel.plt .init .plt .text .fini .rodata
    LOAD0xc0a40x1c0a40x1c0a40x1840x2cc2.31850x6RW 0x8000.ctors .dtors .dynamic .got .data .bss
    DYNAMIC0xc0b80x1c0b80x1c0b80x980x981.92470x6RW 0x4.dynamic
    GNU_STACK0x00x00x00x00x00.00000x7RWE0x4

    Dynamic Tags

    TypeMetaValueTag
    DT_NEEDEDsharedliblibc.so.00x1
    DT_INITvalue0x8aec0xc
    DT_FINIvalue0x1324c0xd
    DT_HASHvalue0x81080x4
    DT_STRTABvalue0x876c0x5
    DT_SYMTABvalue0x832c0x6
    DT_STRSZbytes5520xa
    DT_SYMENTbytes160xb
    DT_DEBUGvalue0x00x15
    DT_PLTGOTvalue0x1c1500x3
    DT_PLTRELSZbytes3440x2
    DT_PLTRELpltrelDT_REL0x14
    DT_JMPRELvalue0x89940x17
    DT_NULLvalue0x00x0

    Symbols

    NameVersion Info NameVersion Info File NameSection NameValueSizeSymbol TypeSymbol BindSymbol VisibilityNdx
    .dynsym0x00NOTYPE<unknown>DEFAULTSHN_UNDEF
    __aeabi_idiv0.dynsym0x1320c4FUNC<unknown>DEFAULT8
    __aeabi_ldiv0.dynsym0x1320c4FUNC<unknown>DEFAULT8
    __aeabi_uidiv.dynsym0x12f4c0FUNC<unknown>DEFAULT8
    __aeabi_uidivmod.dynsym0x1304424FUNC<unknown>DEFAULT8
    __bss_end__.dynsym0x1c3700NOTYPE<unknown>DEFAULTSHN_ABS
    __bss_start.dynsym0x1c2280NOTYPE<unknown>DEFAULTSHN_ABS
    __bss_start__.dynsym0x1c2280NOTYPE<unknown>DEFAULTSHN_ABS
    __data_start.dynsym0x1c2080NOTYPE<unknown>DEFAULT17
    __div0.dynsym0x1320c4FUNC<unknown>DEFAULT8
    __end__.dynsym0x1c3700NOTYPE<unknown>DEFAULTSHN_ABS
    __errno_location.dynsym0x8ca432FUNC<unknown>DEFAULTSHN_UNDEF
    __modsi3.dynsym0x13128228FUNC<unknown>DEFAULT8
    __uClibc_main.dynsym0x8c68488FUNC<unknown>DEFAULTSHN_UNDEF
    __udivsi3.dynsym0x12f4c248FUNC<unknown>DEFAULT8
    __umodsi3.dynsym0x1305c204FUNC<unknown>DEFAULT8
    _bss_end__.dynsym0x1c3700NOTYPE<unknown>DEFAULTSHN_ABS
    _edata.dynsym0x1c2280NOTYPE<unknown>DEFAULTSHN_ABS
    _end.dynsym0x1c3700NOTYPE<unknown>DEFAULTSHN_ABS
    _start.dynsym0x8dfc80FUNC<unknown>DEFAULT8
    abort.dynsym0x8bcc352FUNC<unknown>DEFAULTSHN_UNDEF
    atoi.dynsym0x012FUNC<unknown>DEFAULTSHN_UNDEF
    bind.dynsym0x8bfc44FUNC<unknown>DEFAULTSHN_UNDEF
    calloc.dynsym0x8bd888FUNC<unknown>DEFAULTSHN_UNDEF
    clock.dynsym0x8cc852FUNC<unknown>DEFAULTSHN_UNDEF
    close.dynsym0x8cec44FUNC<unknown>DEFAULTSHN_UNDEF
    closedir.dynsym0x0196FUNC<unknown>DEFAULTSHN_UNDEF
    connect.dynsym0x8b3c44FUNC<unknown>DEFAULTSHN_UNDEF
    exit.dynsym0x8cb0172FUNC<unknown>DEFAULTSHN_UNDEF
    fcntl.dynsym0x8ce0116FUNC<unknown>DEFAULTSHN_UNDEF
    fork.dynsym0x8c5c44FUNC<unknown>DEFAULTSHN_UNDEF
    free.dynsym0x8cf8288FUNC<unknown>DEFAULTSHN_UNDEF
    getpid.dynsym0x8b5444FUNC<unknown>DEFAULTSHN_UNDEF
    getppid.dynsym0x8c8044FUNC<unknown>DEFAULTSHN_UNDEF
    getsockname.dynsym0x8d1044FUNC<unknown>DEFAULTSHN_UNDEF
    getsockopt.dynsym0x8c9848FUNC<unknown>DEFAULTSHN_UNDEF
    inet_addr.dynsym0x8c0836FUNC<unknown>DEFAULTSHN_UNDEF
    ioctl.dynsym0x8b2480FUNC<unknown>DEFAULTSHN_UNDEF
    kill.dynsym0x8bf044FUNC<unknown>DEFAULTSHN_UNDEF
    listen.dynsym0x044FUNC<unknown>DEFAULTSHN_UNDEF
    malloc.dynsym0x8b78400FUNC<unknown>DEFAULTSHN_UNDEF
    memcpy.dynsym0x8b6c4FUNC<unknown>DEFAULTSHN_UNDEF
    memset.dynsym0x8c74156FUNC<unknown>DEFAULTSHN_UNDEF
    open.dynsym0x8cbc92FUNC<unknown>DEFAULTSHN_UNDEF
    opendir.dynsym0x0264FUNC<unknown>DEFAULTSHN_UNDEF
    prctl.dynsym0x8b6048FUNC<unknown>DEFAULTSHN_UNDEF
    rand.dynsym0x8c204FUNC<unknown>DEFAULTSHN_UNDEF
    read.dynsym0x8c3844FUNC<unknown>DEFAULTSHN_UNDEF
    readdir.dynsym0x0224FUNC<unknown>DEFAULTSHN_UNDEF
    readlink.dynsym0x044FUNC<unknown>DEFAULTSHN_UNDEF
    realloc.dynsym0x8c50312FUNC<unknown>DEFAULTSHN_UNDEF
    recv.dynsym0x8b3044FUNC<unknown>DEFAULTSHN_UNDEF
    recvfrom.dynsym0x8b9052FUNC<unknown>DEFAULTSHN_UNDEF
    select.dynsym0x8ba848FUNC<unknown>DEFAULTSHN_UNDEF
    send.dynsym0x8bc044FUNC<unknown>DEFAULTSHN_UNDEF
    sendto.dynsym0x8c4452FUNC<unknown>DEFAULTSHN_UNDEF
    setsid.dynsym0x8cd444FUNC<unknown>DEFAULTSHN_UNDEF
    setsockopt.dynsym0x8c1448FUNC<unknown>DEFAULTSHN_UNDEF
    sigaddset.dynsym0x8bb448FUNC<unknown>DEFAULTSHN_UNDEF
    sigemptyset.dynsym0x8b4824FUNC<unknown>DEFAULTSHN_UNDEF
    signal.dynsym0x8c2c200FUNC<unknown>DEFAULTSHN_UNDEF
    sigprocmask.dynsym0x8d0484FUNC<unknown>DEFAULTSHN_UNDEF
    sleep.dynsym0x8b84420FUNC<unknown>DEFAULTSHN_UNDEF
    socket.dynsym0x8b9c44FUNC<unknown>DEFAULTSHN_UNDEF
    strcpy.dynsym0x8b1828FUNC<unknown>DEFAULTSHN_UNDEF
    time.dynsym0x8c8c44FUNC<unknown>DEFAULTSHN_UNDEF
    unlink.dynsym0x044FUNC<unknown>DEFAULTSHN_UNDEF
    write.dynsym0x8be444FUNC<unknown>DEFAULTSHN_UNDEF

    Network Behavior

    Network Port Distribution

    UDP Packets

    TimestampSource PortDest PortSource IPDest IP
    Apr 18, 2024 09:54:01.196126938 CEST3657453192.168.2.158.8.8.8
    Apr 18, 2024 09:54:01.196178913 CEST5317453192.168.2.158.8.8.8
    Apr 18, 2024 09:54:01.300769091 CEST53531748.8.8.8192.168.2.15
    Apr 18, 2024 09:54:01.301117897 CEST53365748.8.8.8192.168.2.15

    DNS Queries

    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Apr 18, 2024 09:54:01.196126938 CEST192.168.2.158.8.8.80x1e66Standard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Apr 18, 2024 09:54:01.196178913 CEST192.168.2.158.8.8.80x7893Standard query (0)daisy.ubuntu.com28IN (0x0001)false

    DNS Answers

    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Apr 18, 2024 09:54:01.301117897 CEST8.8.8.8192.168.2.150x1e66No error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false
    Apr 18, 2024 09:54:01.301117897 CEST8.8.8.8192.168.2.150x1e66No error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false

    System Behavior

    General

    Start time (UTC):07:51:15
    Start date (UTC):18/04/2024
    Path:/tmp/kBNrex15s8.elf
    Arguments:/tmp/kBNrex15s8.elf
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

    Chronological Activities