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Linux Analysis Report
.i.elf

Overview

General Information

Sample name:.i.elf
Analysis ID:1639704
MD5:b6bd0e03be089372b6b849c8af78d8a3
SHA1:a6357899ac26a279e83391e783b45bcb81df0aca
SHA256:7b8313021406210a23e32acc2ddee70b4351757a37422c641055ad85378eac82
Tags:elfMiraiuser-abuse_ch
Infos:

Detection

Score:56
Range:0 - 100

Signatures

Antivirus / Scanner detection for submitted sample
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:1639704
Start date and time:2025-03-16 03:06:39 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 51s
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:mal56.linELF@0/0@2/0
Command:/tmp/.i.elf
PID:5830
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: 5830, Parent: 5755, 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.elfAvira: detected
Source: .i.elfVirustotal: Detection: 54%Perma Link
Source: .i.elfReversingLabs: Detection: 58%
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: mal56.linELF@0/0@2/0
Source: .i.elfSubmission file: segment LOAD with 7.9959 entropy (max. 8.0)
Source: /tmp/.i.elf (PID: 5830)Queries kernel information via 'uname': Jump to behavior
Source: .i.elf, 5830.1.000055b4a6871000.000055b4a699f000.rw-.sdmpBinary or memory string: U!/etc/qemu-binfmt/arm
Source: .i.elf, 5830.1.00007fff7726e000.00007fff7728f000.rw-.sdmpBinary or memory string: ADx86_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, 5830.1.000055b4a6871000.000055b4a699f000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: .i.elf, 5830.1.00007fff7726e000.00007fff7728f000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: .i.elf, 5830.1.00007fff7726e000.00007fff7728f000.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: 1639704 Sample: .i.elf Startdate: 16/03/2025 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 .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.elf55%VirustotalBrowse
.i.elf58%ReversingLabsLinux.Backdoor.Mirai
.i.elf100%AviraBDS/Berbew.dzcpt
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.comsshd.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    arm7.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    mpsl.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    ppc.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    mips.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    arm.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    arm6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    .i.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    .i.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    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):7.995897890796692
    TrID:
    • ELF Executable and Linkable format (generic) (4004/1) 100.00%
    File name:.i.elf
    File size:52'896 bytes
    MD5:b6bd0e03be089372b6b849c8af78d8a3
    SHA1:a6357899ac26a279e83391e783b45bcb81df0aca
    SHA256:7b8313021406210a23e32acc2ddee70b4351757a37422c641055ad85378eac82
    SHA512:22ee0998b2728d87ea184beabe35e41f128c0b504efeb06e25ddf4c1cfe1a4e7ac9e6af21ab79d2f4e6fc84ea00d1bf2694a7010357d6100573f004b2ffa4c1c
    SSDEEP:1536:87vbq1lGAXSEYQjbChaAU2yU23M51DjZgSQAk:8D+CAXFYQChaAUk5ljnQ9
    TLSH:D93301D01761278C4275D97438EA305E8524292B72EA39542DABD08FF41B623ACB7EFD
    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
    LOAD0x00x100000x100000x137e90x137e97.99590x5R E0x10000
    LOAD0x6fc0x506fc0x506fc0x00x00.00000x6RW 0x10000

    Download Network PCAP: filteredfull

    TimestampSource PortDest PortSource IPDest IP
    Mar 16, 2025 03:07:54.539113998 CET3700153192.168.2.151.1.1.1
    Mar 16, 2025 03:07:54.539180994 CET4887353192.168.2.151.1.1.1
    Mar 16, 2025 03:07:54.548635006 CET53370011.1.1.1192.168.2.15
    Mar 16, 2025 03:07:54.548696041 CET53488731.1.1.1192.168.2.15
    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Mar 16, 2025 03:07:54.539113998 CET192.168.2.151.1.1.10x3ba4Standard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Mar 16, 2025 03:07:54.539180994 CET192.168.2.151.1.1.10x3647Standard query (0)daisy.ubuntu.com28IN (0x0001)false
    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Mar 16, 2025 03:07:54.548635006 CET1.1.1.1192.168.2.150x3ba4No error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false
    Mar 16, 2025 03:07:54.548635006 CET1.1.1.1192.168.2.150x3ba4No error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false

    System Behavior

    Start time (UTC):02:07:52
    Start date (UTC):16/03/2025
    Path:/tmp/.i.elf
    Arguments:/tmp/.i.elf
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1