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Linux Analysis Report
.i.elf

Overview

General Information

Sample name:.i.elf
Analysis ID:1641044
MD5:b71567f70254bb16f17df568a6c867b8
SHA1:d48fb93351b0cb5c43000c46c021db1a395d4ba5
SHA256:837f59019201cb9ea9a8d25da908b4ee5e66c2d7068858d89e7874d4918b07e1
Tags:elfuser-abuse_ch
Infos:

Detection

Score:48
Range:0 - 100

Signatures

Multi AV Scanner detection for submitted file
ELF contains segments with high entropy indicating compressed/encrypted content
Sample contains only a LOAD segment without any section mappings
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

RansomwareSpreadingPhishingBankerTrojan / BotAdwareSpywareExploiterEvaderMinercleansuspiciousmalicious
Joe Sandbox version:42.0.0 Malachite
Analysis ID:1641044
Start date and time:2025-03-18 02:05:20 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 36s
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:.i.elf
Detection:MAL
Classification:mal48.linELF@0/0@2/0
Command:/tmp/.i.elf
PID:5552
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
  • .i.elf (PID: 5552, Parent: 5471, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/.i.elf
  • cleanup
No yara matches
No Suricata rule has matched

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Source: .i.elfVirustotal: Detection: 20%Perma Link
Source: .i.elfReversingLabs: Detection: 44%
Source: global trafficDNS traffic detected: DNS query: daisy.ubuntu.com
Source: LOAD without section mappingsProgram segment: 0x10000
Source: classification engineClassification label: mal48.linELF@0/0@2/0
Source: .i.elfSubmission file: segment LOAD with 7.9909 entropy (max. 8.0)
Source: /tmp/.i.elf (PID: 5552)Queries kernel information via 'uname': Jump to behavior
Source: .i.elf, 5552.1.00007ffc6d271000.00007ffc6d292000.rw-.sdmpBinary or memory string: ex86_64/usr/bin/qemu-arm/tmp/.i.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/.i.elf
Source: .i.elf, 5552.1.0000561186b33000.0000561186c61000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: .i.elf, 5552.1.00007ffc6d271000.00007ffc6d292000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: .i.elf, 5552.1.0000561186b33000.0000561186c61000.rw-.sdmpBinary or memory string: V!/etc/qemu-binfmt/arm
Source: .i.elf, 5552.1.00007ffc6d271000.00007ffc6d292000.rw-.sdmpBinary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped
ReconnaissanceResource DevelopmentInitial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionCommand and ControlExfiltrationImpact
Gather Victim Identity InformationAcquire InfrastructureValid AccountsWindows Management InstrumentationPath InterceptionPath Interception1
Obfuscated Files or Information
OS 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
No configs have been found
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: 1641044 Sample: .i.elf Startdate: 18/03/2025 Architecture: LINUX Score: 48 8 daisy.ubuntu.com 2->8 10 Multi AV Scanner detection for submitted file 2->10 6 .i.elf 2->6         started        signatures3 process4

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


windows-stand
SourceDetectionScannerLabelLink
.i.elf20%VirustotalBrowse
.i.elf44%ReversingLabsLinux.Backdoor.Mirai
No Antivirus matches
No Antivirus matches
No Antivirus matches

Download Network PCAP: filteredfull

NameIPActiveMaliciousAntivirus DetectionReputation
daisy.ubuntu.com
162.213.35.25
truefalse
    high
    No contacted IP infos
    No context
    MatchAssociated Sample Name / URLSHA 256DetectionThreat NameLinkContext
    daisy.ubuntu.com.i.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    arm6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    arm7.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    sshd.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    mips.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    arm.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    arm7.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    hgfs.ppc.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    hgfs.arm.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    hgfs.x86.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    No context
    No context
    No context
    No created / dropped files found
    File type:ELF 32-bit LSB executable, ARM, EABI5 version 1 (GNU/Linux), statically linked, no section header
    Entropy (8bit):7.990862611607833
    TrID:
    • ELF Executable and Linkable format (generic) (4004/1) 100.00%
    File name:.i.elf
    File size:25'056 bytes
    MD5:b71567f70254bb16f17df568a6c867b8
    SHA1:d48fb93351b0cb5c43000c46c021db1a395d4ba5
    SHA256:837f59019201cb9ea9a8d25da908b4ee5e66c2d7068858d89e7874d4918b07e1
    SHA512:e88799e33789a456ac13a4ff94054d5a66c3a3ad84b7d18a656cfa7b327f72a6fa472ddb49b592e8a4810eac910f1bab7b4fc7c248d19764156d4fca89a32253
    SSDEEP:384:yb2eX3zAKuiNPZRwwqdvrrduMXbCAk6Y5VvCYxy0kJXP5:/kAKuobq1rduMGAXSEYEv
    TLSH:9AB2F19123A32159C762CE7837A9740FC1282543729A1D402D90A69BED1FB348CF8FFE
    File Content Preview:.ELF..............(......'..4...........4. ...(......................7...7.............................................c........................i..........?.E.h;....#..$..O.%.......y.A.U"......-R..e....<l>=).!...O........u.....`o..*ziy"......R..~@....x2'_

    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 - Linux
    ABI Version:0
    Entry Point Address:0x22718
    Flags:0x5000202
    ELF Header Size:52
    Program Header Offset:52
    Program Header Size:32
    Number of Program Headers:2
    Section Header Offset:0
    Section Header Size:40
    Number of Section Headers:0
    Header String Table Index:0
    TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
    LOAD0x00x100000x100000x137e90x137e97.99090x5R E0x10000
    LOAD0x6fc0x506fc0x506fc0x00x00.00000x6RW 0x10000

    Download Network PCAP: filteredfull

    TimestampSource PortDest PortSource IPDest IP
    Mar 18, 2025 02:06:20.195529938 CET4516253192.168.2.148.8.8.8
    Mar 18, 2025 02:06:20.200283051 CET53451628.8.8.8192.168.2.14
    Mar 18, 2025 02:06:20.200346947 CET4516253192.168.2.148.8.8.8
    Mar 18, 2025 02:06:20.200406075 CET4516253192.168.2.148.8.8.8
    Mar 18, 2025 02:06:20.200406075 CET4516253192.168.2.148.8.8.8
    Mar 18, 2025 02:06:20.205068111 CET53451628.8.8.8192.168.2.14
    Mar 18, 2025 02:06:20.205338001 CET53451628.8.8.8192.168.2.14
    Mar 18, 2025 02:06:20.690984964 CET53451628.8.8.8192.168.2.14
    Mar 18, 2025 02:06:20.691104889 CET4516253192.168.2.148.8.8.8
    Mar 18, 2025 02:06:22.691020966 CET53451628.8.8.8192.168.2.14
    Mar 18, 2025 02:06:22.691308022 CET4516253192.168.2.148.8.8.8
    Mar 18, 2025 02:06:22.695939064 CET53451628.8.8.8192.168.2.14
    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Mar 18, 2025 02:06:20.200406075 CET192.168.2.148.8.8.80xf660Standard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Mar 18, 2025 02:06:20.200406075 CET192.168.2.148.8.8.80xd923Standard query (0)daisy.ubuntu.com28IN (0x0001)false
    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Mar 18, 2025 02:06:20.690984964 CET8.8.8.8192.168.2.140xf660No error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false
    Mar 18, 2025 02:06:20.690984964 CET8.8.8.8192.168.2.140xf660No error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false

    System Behavior

    Start time (UTC):01:06:18
    Start date (UTC):18/03/2025
    Path:/tmp/.i.elf
    Arguments:/tmp/.i.elf
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1