Joe Sandbox Cloud Basic Analysis Report
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Linux Analysis Report
jkse.arm7.elf

Overview

General Information

Sample name:jkse.arm7.elf
Analysis ID:1643716
MD5:79be81620055a16b6ba577a5fba95013
SHA1:193c93ea263b08abc71e1bd71ac8636e4c18b2a2
SHA256:d88e2cf4026202d98cc853ca1d640cc0979a04978a7ee61a187ef4dbac4a9d6b
Tags:elfuser-abuse_ch
Infos:

Detection

Score:48
Range:0 - 100

Signatures

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

RansomwareSpreadingPhishingBankerTrojan / BotAdwareSpywareExploiterEvaderMinercleansuspiciousmalicious

General Information

Joe Sandbox version:42.0.0 Malachite
Analysis ID:1643716
Start date and time:2025-03-20 02:37:17 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 10m 26s
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:jkse.arm7.elf
Detection:MAL
Classification:mal48.linELF@0/0@2/0
Cookbook Comments:
  • Analysis time extended to 480s due to sleep detection in submitted sample

Runtime Messages

Command:/tmp/jkse.arm7.elf
PID:5433
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
  • jkse.arm7.elf (PID: 5433, Parent: 5354, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/jkse.arm7.elf
  • cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

  • • AV Detection
  • • Networking
  • • System Summary
  • • Malware Analysis System Evasion

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Source: jkse.arm7.elfReversingLabs: Detection: 27%
Source: global trafficDNS traffic detected: DNS query: daisy.ubuntu.com
Source: ELF static info symbol of initial sample.symtab present: no
Source: classification engineClassification label: mal48.linELF@0/0@2/0
Source: /tmp/jkse.arm7.elf (PID: 5433)Queries kernel information via 'uname': Jump to behavior
Source: jkse.arm7.elf, 5433.1.00007fffaa364000.00007fffaa385000.rw-.sdmpBinary or memory string: qemu: %s: %s
Source: jkse.arm7.elf, 5433.1.00005629b362c000.00005629b375a000.rw-.sdmpBinary or memory string: )V!/etc/qemu-binfmt/arm
Source: jkse.arm7.elf, 5433.1.00007fffaa364000.00007fffaa385000.rw-.sdmpBinary or memory string: leqemu: %s: %s
Source: jkse.arm7.elf, 5433.1.00005629b362c000.00005629b375a000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: jkse.arm7.elf, 5433.1.00007fffaa364000.00007fffaa385000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: jkse.arm7.elf, 5433.1.00005629b362c000.00005629b375a000.rw-.sdmpBinary or memory string: rg.qemu.gdb.arm.sys.regs">
Source: jkse.arm7.elf, 5433.1.00005629b362c000.00005629b375a000.rw-.sdmpBinary or memory string: )Vrg.qemu.gdb.arm.sys.regs">
Source: jkse.arm7.elf, 5433.1.00007fffaa364000.00007fffaa385000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/jkse.arm7.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/jkse.arm7.elf

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

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Legend:

  • Process
  • Signature
  • Created File
  • DNS/IP Info
  • Is Dropped
  • Number of created Files
  • Is malicious
  • Internet
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1643716 Sample: jkse.arm7.elf Startdate: 20/03/2025 Architecture: LINUX Score: 48 8 daisy.ubuntu.com 2->8 10 Multi AV Scanner detection for submitted file 2->10 6 jkse.arm7.elf 2->6         started        signatures3 process4

Screenshots

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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
jkse.arm7.elf28%ReversingLabsLinux.Backdoor.Mirai

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.comjkse.x86.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    bin.sh.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    jkse.arm7.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    jkse.arm.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    jkse.ppc.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    jkse.mips.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    jkse.mpsl.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    jkse.x86.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    .i.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    i.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25

    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), dynamically linked, interpreter /lib/ld-uClibc.so.0, stripped
    Entropy (8bit):5.559112187378634
    TrID:
    • ELF Executable and Linkable format (generic) (4004/1) 100.00%
    File name:jkse.arm7.elf
    File size:18'311 bytes
    MD5:79be81620055a16b6ba577a5fba95013
    SHA1:193c93ea263b08abc71e1bd71ac8636e4c18b2a2
    SHA256:d88e2cf4026202d98cc853ca1d640cc0979a04978a7ee61a187ef4dbac4a9d6b
    SHA512:08ffc7ba3d669862f64885c3373916d0921711f1635df2007a354f7028e4ac71e89376fabc03e5b007373eb880bacbf910b163186ba1162fa14881b80a908436
    SSDEEP:384:tKtnCyGXmcmMnnnnn6lcnnnnnnnnnnnnkg0l5w4VSK0bE3Telic:OCyGcl5w4EK0bEDelR
    TLSH:FC828588E929637FC3E1F7FFDB8546CE33761B89A74F361AD235819023C17589A25620
    File Content Preview:.ELF..............(.........4....C......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:UNIX - System V
    ABI Version:0
    Entry Point Address:0x8cc0
    Flags:0x4000002
    ELF Header Size:52
    Program Header Offset:52
    Program Header Size:32
    Number of Program Headers:6
    Section Header Offset:17376
    Section Header Size:40
    Number of Section Headers:22
    Header String Table Index:21

    Sections

    NameTypeAddressOffsetSizeEntSizeFlagsFlags DescriptionLinkInfoAlign
    NULL0x00x00x00x00x0000
    .interpPROGBITS0x80f40xf40x140x00x2A001
    .hashHASH0x81080x1080x1900x40x2A304
    .dynsymDYNSYM0x82980x2980x3d00x100x2A414
    .dynstrSTRTAB0x86680x6680x1cc0x00x2A001
    .rel.pltREL0x88340x8340x1880x80x2A374
    .initPROGBITS0x89bc0x9bc0x100x00x6AX004
    .pltPROGBITS0x89cc0x9cc0x2600x40x6AX004
    .textPROGBITS0x8c2c0xc2c0x2dc40x00x6AX004
    .finiPROGBITS0xb9f00x39f00x100x00x6AX004
    .rodataPROGBITS0xba000x3a000x28c0x00x2A004
    .eh_framePROGBITS0x140000x40000x40x00x3WA004
    .init_arrayINIT_ARRAY0x140040x40040x40x00x3WA004
    .fini_arrayFINI_ARRAY0x140080x40080x40x00x3WA004
    .jcrPROGBITS0x1400c0x400c0x40x00x3WA004
    .dynamicDYNAMIC0x140100x40100xb80x80x3WA404
    .gotPROGBITS0x140c80x40c80xd00x40x3WA004
    .dataPROGBITS0x141980x41980x9c0x00x3WA004
    .bssNOBITS0x142340x42340xd42c0x00x3WA004
    .commentPROGBITS0x00x42340xee0x00x0001
    .ARM.attributesARM_ATTRIBUTES0x00x43220x160x00x0001
    .shstrtabSTRTAB0x00x43380xa50x00x0001

    Program Segments

    TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
    PHDR0x340x80340x80340xc00xc02.20330x5R E0x4
    INTERP0xf40x80f40x80f40x140x143.68420x4R 0x1/lib/ld-uClibc.so.0.interp
    LOAD0x00x80000x80000x3c8c0x3c8c5.79720x5R E0x8000.interp .hash .dynsym .dynstr .rel.plt .init .plt .text .fini .rodata
    LOAD0x40000x140000x140000x2340xd6604.01990x6RW 0x8000.eh_frame .init_array .fini_array .jcr .dynamic .got .data .bss
    DYNAMIC0x40100x140100x140100xb80xb82.05240x6RW 0x4.dynamic
    GNU_STACK0x00x00x00x00x00.00000x7RWE0x4

    Dynamic Tags

    TypeMetaValueTag
    DT_NEEDEDsharedliblibc.so.00x1
    DT_INITvalue0x89bc0xc
    DT_FINIvalue0xb9f00xd
    DT_INIT_ARRAYvalue0x140040x19
    DT_INIT_ARRAYSZbytes40x1b
    DT_FINI_ARRAYvalue0x140080x1a
    DT_FINI_ARRAYSZbytes40x1c
    DT_HASHvalue0x81080x4
    DT_STRTABvalue0x86680x5
    DT_SYMTABvalue0x82980x6
    DT_STRSZbytes4600xa
    DT_SYMENTbytes160xb
    DT_DEBUGvalue0x00x15
    DT_PLTGOTvalue0x140c80x3
    DT_PLTRELSZbytes3920x2
    DT_PLTRELpltrelDT_REL0x14
    DT_JMPRELvalue0x88340x17
    DT_NULLvalue0x00x0

    Symbols

    NameVersion Info NameVersion Info File NameSection NameValueSizeSymbol TypeSymbol BindSymbol VisibilityNdx
    .dynsym0x00NOTYPE<unknown>DEFAULTSHN_UNDEF
    __bss_end__.dynsym0x216600NOTYPE<unknown>DEFAULTSHN_ABS
    __bss_start.dynsym0x142340NOTYPE<unknown>DEFAULTSHN_ABS
    __bss_start__.dynsym0x142340NOTYPE<unknown>DEFAULTSHN_ABS
    __data_start.dynsym0x141980NOTYPE<unknown>DEFAULT17
    __end__.dynsym0x216600NOTYPE<unknown>DEFAULTSHN_ABS
    __errno_location.dynsym0x8b8432FUNC<unknown>DEFAULTSHN_UNDEF
    __exidx_end.dynsym0xbc8c0NOTYPE<unknown>DEFAULTSHN_ABS
    __exidx_start.dynsym0xbc8c0NOTYPE<unknown>DEFAULTSHN_ABS
    __uClibc_main.dynsym0x8b30848FUNC<unknown>DEFAULTSHN_UNDEF
    _bss_end__.dynsym0x216600NOTYPE<unknown>DEFAULTSHN_ABS
    _edata.dynsym0x142340NOTYPE<unknown>DEFAULTSHN_ABS
    _end.dynsym0x216600NOTYPE<unknown>DEFAULTSHN_ABS
    _exit.dynsym0x8ba8104FUNC<unknown>DEFAULTSHN_UNDEF
    _start.dynsym0x8cc080FUNC<unknown>DEFAULT8
    abort.dynsym0x8a94296FUNC<unknown>DEFAULTSHN_UNDEF
    atoi.dynsym0x8b9c32FUNC<unknown>DEFAULTSHN_UNDEF
    clock.dynsym0x8bcc52FUNC<unknown>DEFAULTSHN_UNDEF
    close.dynsym0x8bf0100FUNC<unknown>DEFAULTSHN_UNDEF
    connect.dynsym0x89f8116FUNC<unknown>DEFAULTSHN_UNDEF
    exit.dynsym0x8b90196FUNC<unknown>DEFAULTSHN_UNDEF
    fcntl.dynsym0x8be4244FUNC<unknown>DEFAULTSHN_UNDEF
    fork.dynsym0x8b24972FUNC<unknown>DEFAULTSHN_UNDEF
    free.dynsym0x8c08572FUNC<unknown>DEFAULTSHN_UNDEF
    getpid.dynsym0x8a1c72FUNC<unknown>DEFAULTSHN_UNDEF
    getppid.dynsym0x8b4820FUNC<unknown>DEFAULTSHN_UNDEF
    getsockname.dynsym0x8c2068FUNC<unknown>DEFAULTSHN_UNDEF
    getsockopt.dynsym0x8b6c72FUNC<unknown>DEFAULTSHN_UNDEF
    htonl.dynsym0x8b0032FUNC<unknown>DEFAULTSHN_UNDEF
    htons.dynsym0x8b7816FUNC<unknown>DEFAULTSHN_UNDEF
    inet_addr.dynsym0x8ac440FUNC<unknown>DEFAULTSHN_UNDEF
    ioctl.dynsym0x89ec224FUNC<unknown>DEFAULTSHN_UNDEF
    kill.dynsym0x8aac56FUNC<unknown>DEFAULTSHN_UNDEF
    malloc.dynsym0x8a4c2360FUNC<unknown>DEFAULTSHN_UNDEF
    memcpy.dynsym0x8a344FUNC<unknown>DEFAULTSHN_UNDEF
    memmove.dynsym0x8a104FUNC<unknown>DEFAULTSHN_UNDEF
    memset.dynsym0x8b3c156FUNC<unknown>DEFAULTSHN_UNDEF
    open.dynsym0x8bc0100FUNC<unknown>DEFAULTSHN_UNDEF
    prctl.dynsym0x8a2868FUNC<unknown>DEFAULTSHN_UNDEF
    raise.dynsym0x8bfc240FUNC<unknown>DEFAULTSHN_UNDEF
    read.dynsym0x8af4100FUNC<unknown>DEFAULTSHN_UNDEF
    select.dynsym0x8a70132FUNC<unknown>DEFAULTSHN_UNDEF
    send.dynsym0x8a88112FUNC<unknown>DEFAULTSHN_UNDEF
    sendto.dynsym0x8b0c136FUNC<unknown>DEFAULTSHN_UNDEF
    setsid.dynsym0x8bd864FUNC<unknown>DEFAULTSHN_UNDEF
    setsockopt.dynsym0x8ad072FUNC<unknown>DEFAULTSHN_UNDEF
    sigaddset.dynsym0x8a7c80FUNC<unknown>DEFAULTSHN_UNDEF
    sigemptyset.dynsym0x8a0420FUNC<unknown>DEFAULTSHN_UNDEF
    signal.dynsym0x8ae8196FUNC<unknown>DEFAULTSHN_UNDEF
    sigprocmask.dynsym0x8c14140FUNC<unknown>DEFAULTSHN_UNDEF
    sleep.dynsym0x8a58272FUNC<unknown>DEFAULTSHN_UNDEF
    socket.dynsym0x8a6468FUNC<unknown>DEFAULTSHN_UNDEF
    strcat.dynsym0x8ab840FUNC<unknown>DEFAULTSHN_UNDEF
    strcmp.dynsym0x8b6028FUNC<unknown>DEFAULTSHN_UNDEF
    strcpy.dynsym0x89e036FUNC<unknown>DEFAULTSHN_UNDEF
    strlen.dynsym0x8bb496FUNC<unknown>DEFAULTSHN_UNDEF
    strstr.dynsym0x8adc252FUNC<unknown>DEFAULTSHN_UNDEF
    strtok.dynsym0x8b1848FUNC<unknown>DEFAULTSHN_UNDEF
    system.dynsym0x8a40132FUNC<unknown>DEFAULTSHN_UNDEF
    time.dynsym0x8b5448FUNC<unknown>DEFAULTSHN_UNDEF
    write.dynsym0x8aa0100FUNC<unknown>DEFAULTSHN_UNDEF

    Network Behavior

    Download Network PCAP: filtered – full

    TimestampSource PortDest PortSource IPDest IP
    Mar 20, 2025 02:40:51.489697933 CET5424053192.168.2.138.8.8.8
    Mar 20, 2025 02:40:51.489739895 CET3780153192.168.2.138.8.8.8
    Mar 20, 2025 02:40:51.620990038 CET53542408.8.8.8192.168.2.13
    Mar 20, 2025 02:40:51.623402119 CET53378018.8.8.8192.168.2.13

    DNS Queries

    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Mar 20, 2025 02:40:51.489697933 CET192.168.2.138.8.8.80x29b9Standard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Mar 20, 2025 02:40:51.489739895 CET192.168.2.138.8.8.80x318Standard query (0)daisy.ubuntu.com28IN (0x0001)false

    DNS Answers

    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Mar 20, 2025 02:40:51.620990038 CET8.8.8.8192.168.2.130x29b9No error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false
    Mar 20, 2025 02:40:51.620990038 CET8.8.8.8192.168.2.130x29b9No error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false

    System Behavior

    General

    Start time (UTC):01:38:04
    Start date (UTC):20/03/2025
    Path:/tmp/jkse.arm7.elf
    Arguments:/tmp/jkse.arm7.elf
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

    File Activities

    Process Activities

    System Activities