Edit tour

Linux Analysis Report
.i.elf

Overview

General Information

Sample name:.i.elf
Analysis ID:1648048
MD5:4b3bd86fe87d83d973e66b4cde031058
SHA1:28c100f504c469f1b5118865e8d8e9c70a767664
SHA256:4dba95235a05789b47de3df4859c663cd58e48a03381d18a50c81a56107f5a65
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:1648048
Start date and time:2025-03-25 14:11:31 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 28s
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:5414
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: 5414, Parent: 5336, 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: 26%Perma Link
Source: .i.elfReversingLabs: Detection: 52%
Source: unknownUDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknownUDP traffic detected without corresponding DNS query: 1.1.1.1
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 7.9936 entropy (max. 8.0)
Source: /tmp/.i.elf (PID: 5414)Queries kernel information via 'uname': Jump to behavior
Source: .i.elf, 5414.1.00007ffd1fec3000.00007ffd1fee4000.rw-.sdmpBinary or memory string: x86_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, 5414.1.0000560094f01000.000056009502f000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: .i.elf, 5414.1.0000560094f01000.000056009502f000.rw-.sdmpBinary or memory string: V!/etc/qemu-binfmt/arm
Source: .i.elf, 5414.1.00007ffd1fec3000.00007ffd1fee4000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: .i.elf, 5414.1.00007ffd1fec3000.00007ffd1fee4000.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: 1648048 Sample: .i.elf Startdate: 25/03/2025 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
SourceDetectionScannerLabelLink
.i.elf27%VirustotalBrowse
.i.elf53%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.comgarm6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    tarm6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    i.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    aarch64.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    sh4.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    arm6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    mips.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    arm7.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    arm5.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    mips.elfGet hashmaliciousMiraiBrowse
    • 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):7.993570446272894
    TrID:
    • ELF Executable and Linkable format (generic) (4004/1) 100.00%
    File name:.i.elf
    File size:36'720 bytes
    MD5:4b3bd86fe87d83d973e66b4cde031058
    SHA1:28c100f504c469f1b5118865e8d8e9c70a767664
    SHA256:4dba95235a05789b47de3df4859c663cd58e48a03381d18a50c81a56107f5a65
    SHA512:3e49104f6982b8c61abc5550a93365d901a5449fdcfe45a0974cc50f82c3d96e95361c4182b1a147f8702ca47145b1ea5d97f06f8d97c904e1509cfc5c008e27
    SSDEEP:768:/kAKuobq1rduMGAXSEYEYv6DjbChaAUKvNvy0OQTN:87vbq1lGAXSEYQjbChaAU2yUN
    TLSH:F0F2F1D11361178CC766DB783DBD7019C838111B32E90E402DD3A68AEA0F724A87AEFD
    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
    LOAD0x00x100000x100000x137e90x137e97.99360x5R E0x10000
    LOAD0x6fc0x506fc0x506fc0x00x00.00000x6RW 0x10000

    Download Network PCAP: filteredfull

    TimestampSource PortDest PortSource IPDest IP
    Mar 25, 2025 14:12:20.872162104 CET3909253192.168.2.131.1.1.1
    Mar 25, 2025 14:12:20.872220993 CET5426753192.168.2.131.1.1.1
    Mar 25, 2025 14:12:20.980195999 CET53390921.1.1.1192.168.2.13
    Mar 25, 2025 14:12:20.995635033 CET53542671.1.1.1192.168.2.13
    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Mar 25, 2025 14:12:20.872162104 CET192.168.2.131.1.1.10x4feaStandard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Mar 25, 2025 14:12:20.872220993 CET192.168.2.131.1.1.10x2f82Standard query (0)daisy.ubuntu.com28IN (0x0001)false
    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Mar 25, 2025 14:12:20.980195999 CET1.1.1.1192.168.2.130x4feaNo error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false
    Mar 25, 2025 14:12:20.980195999 CET1.1.1.1192.168.2.130x4feaNo error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false

    System Behavior

    Start time (UTC):13:12:19
    Start date (UTC):25/03/2025
    Path:/tmp/.i.elf
    Arguments:/tmp/.i.elf
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1