Joe Sandbox Cloud Basic Analysis Report
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Linux Analysis Report
k03ldc.arm5.elf

Overview

General Information

Sample name:k03ldc.arm5.elf
Analysis ID:1650091
MD5:bf4a0264b91e7ea91b3f2bb6aee1210b
SHA1:4afe589d6d0a32e7104b28647d1bf6717df44382
SHA256:78cabff0297908c5a9e688a3014b0e9925bef1c2b00855723f3497d4b2f715b7
Tags:elfuser-abuse_ch
Infos:

Detection

Score:56
Range:0 - 100

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

RansomwareSpreadingPhishingBankerTrojan / BotAdwareSpywareExploiterEvaderMinercleansuspiciousmalicious

General Information

Joe Sandbox version:42.0.0 Malachite
Analysis ID:1650091
Start date and time:2025-03-27 13:15:25 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 10m 18s
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:k03ldc.arm5.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/k03ldc.arm5.elf
PID:5503
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
  • k03ldc.arm5.elf (PID: 5503, Parent: 5426, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/k03ldc.arm5.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: k03ldc.arm5.elfAvira: detected
Source: k03ldc.arm5.elfVirustotal: Detection: 53%Perma Link
Source: k03ldc.arm5.elfReversingLabs: Detection: 61%
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: mal56.linELF@0/0@2/0
Source: /tmp/k03ldc.arm5.elf (PID: 5503)Queries kernel information via 'uname': Jump to behavior
Source: k03ldc.arm5.elf, 5503.1.0000557a491d3000.0000557a49301000.rw-.sdmpBinary or memory string: IzUrg.qemu.gdb.arm.sys.regs">
Source: k03ldc.arm5.elf, 5503.1.00007ffdf43e8000.00007ffdf4409000.rw-.sdmpBinary or memory string: qemu: %s: %s
Source: k03ldc.arm5.elf, 5503.1.00007ffdf43e8000.00007ffdf4409000.rw-.sdmpBinary or memory string: leqemu: %s: %s
Source: k03ldc.arm5.elf, 5503.1.00007ffdf43e8000.00007ffdf4409000.rw-.sdmpBinary or memory string: {x86_64/usr/bin/qemu-arm/tmp/k03ldc.arm5.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/k03ldc.arm5.elf
Source: k03ldc.arm5.elf, 5503.1.0000557a491d3000.0000557a49301000.rw-.sdmpBinary or memory string: IzU!/etc/qemu-binfmt/arm
Source: k03ldc.arm5.elf, 5503.1.0000557a491d3000.0000557a49301000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: k03ldc.arm5.elf, 5503.1.00007ffdf43e8000.00007ffdf4409000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: k03ldc.arm5.elf, 5503.1.0000557a491d3000.0000557a49301000.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
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1650091 Sample: k03ldc.arm5.elf Startdate: 27/03/2025 Architecture: LINUX Score: 56 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 6 k03ldc.arm5.elf 2->6         started        signatures3 process4

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

SourceDetectionScannerLabelLink
k03ldc.arm5.elf54%VirustotalBrowse
k03ldc.arm5.elf61%ReversingLabsLinux.Trojan.Mirai
k03ldc.arm5.elf100%AviraEXP/ELF.Gafgyt.Z.A

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.comk03ldc.arm6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    tftp.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    i.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    i.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    morte.spc.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    efjepc.elfGet hashmaliciousGafgyt, MiraiBrowse
    • 162.213.35.25
    morte.arm6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    spc.elfGet hashmaliciousOkiruBrowse
    • 162.213.35.24
    resgod.ppc.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    x64.elfGet hashmaliciousGafgyt, OkiruBrowse
    • 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, version 1 (ARM), dynamically linked, interpreter /lib/ld-uClibc.so.0, stripped
    Entropy (8bit):6.0960475231345805
    TrID:
    • ELF Executable and Linkable format (generic) (4004/1) 100.00%
    File name:k03ldc.arm5.elf
    File size:52'788 bytes
    MD5:bf4a0264b91e7ea91b3f2bb6aee1210b
    SHA1:4afe589d6d0a32e7104b28647d1bf6717df44382
    SHA256:78cabff0297908c5a9e688a3014b0e9925bef1c2b00855723f3497d4b2f715b7
    SHA512:995e7eaf5becc252717bd8b42f2dd8d596553e3311b45b3cb31efc9280c08e0c5b60e25dcf4f2158070013b336d5c7f48d6e260734f1383371ae769d189f0912
    SSDEEP:768:Jzk9GZVH0G1iSw2xBOdMQgRFtZ6o736y0uiDz701T1fj7NSqtUut65aQ8MoK6RXY:qMZ6G1N7xBPLZ96B8t462ZJcF/m2c
    TLSH:2833C6C2BD41A629C7C04677ED6F509E3310A7DCE0DA37429C184BA47A9FD1B0D9BB89
    File Content Preview:.ELF...a..........(.........4...d.......4. ...(.........4...4...4...................................................................H...H...............L...L...L.......H...............`...`...`...................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:0x8e8c
    Flags:0x2
    ELF Header Size:52
    Program Header Offset:52
    Program Header Size:32
    Number of Program Headers:6
    Section Header Offset:52068
    Section Header Size:40
    Number of Section Headers:18
    Header String Table Index:17

    Sections

    NameTypeAddressOffsetSizeEntSizeFlagsFlags DescriptionLinkInfoAlign
    NULL0x00x00x00x00x0000
    .interpPROGBITS0x80f40xf40x140x00x2A001
    .hashHASH0x81080x1080x2240x40x2A304
    .dynsymDYNSYM0x832c0x32c0x4400x100x2A414
    .dynstrSTRTAB0x876c0x76c0x22b0x00x2A001
    .rel.pltREL0x89980x9980x1900x80x2A374
    .initPROGBITS0x8b280xb280x180x00x6AX004
    .pltPROGBITS0x8b400xb400x26c0x40x6AX004
    .textPROGBITS0x8dac0xdac0xb1b80x00x6AX004
    .finiPROGBITS0x13f640xbf640x140x00x6AX004
    .rodataPROGBITS0x13f780xbf780x9d00x00x2A004
    .ctorsPROGBITS0x1c94c0xc94c0x80x00x3WA004
    .dtorsPROGBITS0x1c9540xc9540x80x00x3WA004
    .dynamicDYNAMIC0x1c9600xc9600x980x80x3WA404
    .gotPROGBITS0x1c9f80xc9f80xd40x40x3WA004
    .dataPROGBITS0x1cacc0xcacc0x240x00x3WA004
    .bssNOBITS0x1caf00xcaf00x3a40x00x3WA004
    .shstrtabSTRTAB0x00xcaf00x730x00x0001

    Program Segments

    TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
    PHDR0x340x80340x80340xc00xc02.25300x5R E0x4
    INTERP0xf40x80f40x80f40x140x143.68420x4R 0x1/lib/ld-uClibc.so.0.interp
    LOAD0x00x80000x80000xc9480xc9486.13380x5R E0x8000.interp .hash .dynsym .dynstr .rel.plt .init .plt .text .fini .rodata
    LOAD0xc94c0x1c94c0x1c94c0x1a40x5482.28590x6RW 0x8000.ctors .dtors .dynamic .got .data .bss
    DYNAMIC0xc9600x1c9600x1c9600x980x981.92470x6RW 0x4.dynamic
    GNU_STACK0x00x00x00x00x00.00000x7RWE0x4

    Dynamic Tags

    TypeMetaValueTag
    DT_NEEDEDsharedliblibc.so.00x1
    DT_INITvalue0x8b280xc
    DT_FINIvalue0x13f640xd
    DT_HASHvalue0x81080x4
    DT_STRTABvalue0x876c0x5
    DT_SYMTABvalue0x832c0x6
    DT_STRSZbytes5550xa
    DT_SYMENTbytes160xb
    DT_DEBUGvalue0x00x15
    DT_PLTGOTvalue0x1c9f80x3
    DT_PLTRELSZbytes4000x2
    DT_PLTRELpltrelDT_REL0x14
    DT_JMPRELvalue0x89980x17
    DT_NULLvalue0x00x0

    Symbols

    NameVersion Info NameVersion Info File NameSection NameValueSizeSymbol TypeSymbol BindSymbol VisibilityNdx
    .dynsym0x00NOTYPE<unknown>DEFAULTSHN_UNDEF
    __aeabi_idiv0.dynsym0x13f244FUNC<unknown>DEFAULT8
    __aeabi_ldiv0.dynsym0x13f244FUNC<unknown>DEFAULT8
    __aeabi_uidiv.dynsym0x13c640FUNC<unknown>DEFAULT8
    __aeabi_uidivmod.dynsym0x13d5c24FUNC<unknown>DEFAULT8
    __bss_end__.dynsym0x1ce940NOTYPE<unknown>DEFAULTSHN_ABS
    __bss_start.dynsym0x1caf00NOTYPE<unknown>DEFAULTSHN_ABS
    __bss_start__.dynsym0x1caf00NOTYPE<unknown>DEFAULTSHN_ABS
    __data_start.dynsym0x1cacc0NOTYPE<unknown>DEFAULT17
    __div0.dynsym0x13f244FUNC<unknown>DEFAULT8
    __end__.dynsym0x1ce940NOTYPE<unknown>DEFAULTSHN_ABS
    __errno_location.dynsym0x8d2832FUNC<unknown>DEFAULTSHN_UNDEF
    __modsi3.dynsym0x13e40228FUNC<unknown>DEFAULT8
    __uClibc_main.dynsym0x8ce0488FUNC<unknown>DEFAULTSHN_UNDEF
    __udivsi3.dynsym0x13c64248FUNC<unknown>DEFAULT8
    __umodsi3.dynsym0x13d74204FUNC<unknown>DEFAULT8
    _bss_end__.dynsym0x1ce940NOTYPE<unknown>DEFAULTSHN_ABS
    _edata.dynsym0x1caf00NOTYPE<unknown>DEFAULTSHN_ABS
    _end.dynsym0x1ce940NOTYPE<unknown>DEFAULTSHN_ABS
    _start.dynsym0x8e8c80FUNC<unknown>DEFAULT8
    abort.dynsym0x8c2c352FUNC<unknown>DEFAULTSHN_UNDEF
    accept.dynsym0x8c3844FUNC<unknown>DEFAULTSHN_UNDEF
    bind.dynsym0x8c6844FUNC<unknown>DEFAULTSHN_UNDEF
    calloc.dynsym0x8c4488FUNC<unknown>DEFAULTSHN_UNDEF
    clock.dynsym0x8d4c52FUNC<unknown>DEFAULTSHN_UNDEF
    close.dynsym0x8d7c44FUNC<unknown>DEFAULTSHN_UNDEF
    closedir.dynsym0x8d64196FUNC<unknown>DEFAULTSHN_UNDEF
    connect.dynsym0x8b7844FUNC<unknown>DEFAULTSHN_UNDEF
    exit.dynsym0x8d34172FUNC<unknown>DEFAULTSHN_UNDEF
    fcntl.dynsym0x8d70116FUNC<unknown>DEFAULTSHN_UNDEF
    fork.dynsym0x8cd444FUNC<unknown>DEFAULTSHN_UNDEF
    free.dynsym0x8d88288FUNC<unknown>DEFAULTSHN_UNDEF
    getpid.dynsym0x8b9c44FUNC<unknown>DEFAULTSHN_UNDEF
    getppid.dynsym0x8cf844FUNC<unknown>DEFAULTSHN_UNDEF
    getsockname.dynsym0x8da044FUNC<unknown>DEFAULTSHN_UNDEF
    getsockopt.dynsym0x8d1c48FUNC<unknown>DEFAULTSHN_UNDEF
    inet_addr.dynsym0x8c7436FUNC<unknown>DEFAULTSHN_UNDEF
    ioctl.dynsym0x8b6080FUNC<unknown>DEFAULTSHN_UNDEF
    kill.dynsym0x8c5c44FUNC<unknown>DEFAULTSHN_UNDEF
    listen.dynsym0x8cc844FUNC<unknown>DEFAULTSHN_UNDEF
    malloc.dynsym0x8bcc400FUNC<unknown>DEFAULTSHN_UNDEF
    memcpy.dynsym0x8bb44FUNC<unknown>DEFAULTSHN_UNDEF
    memmove.dynsym0x8b904FUNC<unknown>DEFAULTSHN_UNDEF
    memset.dynsym0x8cec156FUNC<unknown>DEFAULTSHN_UNDEF
    open.dynsym0x8d4092FUNC<unknown>DEFAULTSHN_UNDEF
    opendir.dynsym0x8d10264FUNC<unknown>DEFAULTSHN_UNDEF
    prctl.dynsym0x8ba848FUNC<unknown>DEFAULTSHN_UNDEF
    rand.dynsym0x8c8c4FUNC<unknown>DEFAULTSHN_UNDEF
    read.dynsym0x8ca444FUNC<unknown>DEFAULTSHN_UNDEF
    readdir.dynsym0x8c08224FUNC<unknown>DEFAULTSHN_UNDEF
    readlink.dynsym0x8bc044FUNC<unknown>DEFAULTSHN_UNDEF
    realloc.dynsym0x8cbc312FUNC<unknown>DEFAULTSHN_UNDEF
    recv.dynsym0x8b6c44FUNC<unknown>DEFAULTSHN_UNDEF
    recvfrom.dynsym0x8be452FUNC<unknown>DEFAULTSHN_UNDEF
    select.dynsym0x8bfc48FUNC<unknown>DEFAULTSHN_UNDEF
    send.dynsym0x8c2044FUNC<unknown>DEFAULTSHN_UNDEF
    sendto.dynsym0x8cb052FUNC<unknown>DEFAULTSHN_UNDEF
    setsid.dynsym0x8d5844FUNC<unknown>DEFAULTSHN_UNDEF
    setsockopt.dynsym0x8c8048FUNC<unknown>DEFAULTSHN_UNDEF
    sigaddset.dynsym0x8c1448FUNC<unknown>DEFAULTSHN_UNDEF
    sigemptyset.dynsym0x8b8424FUNC<unknown>DEFAULTSHN_UNDEF
    signal.dynsym0x8c98200FUNC<unknown>DEFAULTSHN_UNDEF
    sigprocmask.dynsym0x8d9484FUNC<unknown>DEFAULTSHN_UNDEF
    sleep.dynsym0x8bd8420FUNC<unknown>DEFAULTSHN_UNDEF
    socket.dynsym0x8bf044FUNC<unknown>DEFAULTSHN_UNDEF
    strcpy.dynsym0x8b5428FUNC<unknown>DEFAULTSHN_UNDEF
    time.dynsym0x8d0444FUNC<unknown>DEFAULTSHN_UNDEF
    write.dynsym0x8c5044FUNC<unknown>DEFAULTSHN_UNDEF

    Network Behavior

    Download Network PCAP: filtered – full

    TimestampSource PortDest PortSource IPDest IP
    Mar 27, 2025 13:18:50.499190092 CET4678253192.168.2.148.8.8.8
    Mar 27, 2025 13:18:50.499249935 CET3510753192.168.2.148.8.8.8
    Mar 27, 2025 13:18:50.587538958 CET53351078.8.8.8192.168.2.14
    Mar 27, 2025 13:18:50.587564945 CET53467828.8.8.8192.168.2.14

    DNS Queries

    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Mar 27, 2025 13:18:50.499190092 CET192.168.2.148.8.8.80xf383Standard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Mar 27, 2025 13:18:50.499249935 CET192.168.2.148.8.8.80xc2e8Standard query (0)daisy.ubuntu.com28IN (0x0001)false

    DNS Answers

    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Mar 27, 2025 13:18:50.587564945 CET8.8.8.8192.168.2.140xf383No error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false
    Mar 27, 2025 13:18:50.587564945 CET8.8.8.8192.168.2.140xf383No error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false

    System Behavior

    General

    Start time (UTC):12:16:05
    Start date (UTC):27/03/2025
    Path:/tmp/k03ldc.arm5.elf
    Arguments:/tmp/k03ldc.arm5.elf
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

    File Activities

    Process Activities

    System Activities