Edit tour

Linux Analysis Report
.i.elf

Overview

General Information

Sample name:.i.elf
Analysis ID:1639803
MD5:dcf8c7dba337bb22e8ae8720c77134a8
SHA1:6c3831a3062b6305e84a50e3dad17d2cb05bdf51
SHA256:c496c4b0b56b950ce120177d70cf36bfffefe1595833fe5f0968d807df4b32e1
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
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:1639803
Start date and time:2025-03-16 09:20:36 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 31s
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:5597
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: 5597, Parent: 5524, 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.elfReversingLabs: Detection: 58%
Source: .i.elfVirustotal: Detection: 47%Perma Link
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 7.9969 entropy (max. 8.0)
Source: /tmp/.i.elf (PID: 5597)Queries kernel information via 'uname': Jump to behavior
Source: .i.elf, 5597.1.00007fffbe2df000.00007fffbe300000.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, 5597.1.00005563c877e000.00005563c88ac000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: .i.elf, 5597.1.00005563c877e000.00005563c88ac000.rw-.sdmpBinary or memory string: cU!/etc/qemu-binfmt/arm
Source: .i.elf, 5597.1.00007fffbe2df000.00007fffbe300000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: .i.elf, 5597.1.00007fffbe2df000.00007fffbe300000.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: 1639803 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
SourceDetectionScannerLabelLink
.i.elf58%ReversingLabsLinux.Backdoor.Mirai
.i.elf48%VirustotalBrowse
.i.elf100%AviraLINUX/Mirai.vebvu
No Antivirus matches
No Antivirus matches
No Antivirus matches

Download Network PCAP: filteredfull

NameIPActiveMaliciousAntivirus DetectionReputation
daisy.ubuntu.com
162.213.35.24
truefalse
    high
    No contacted IP infos
    No context
    MatchAssociated Sample Name / URLSHA 256DetectionThreat NameLinkContext
    daisy.ubuntu.comyakuza.ppc.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    sora.mpsl.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    sora.sh4.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    sora.arm7.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    sora.spc.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    sora.m68k.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    sora.mips.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    sora.x86.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    hgfs.arm5.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    hgfs.arm.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):7.996877522845406
    TrID:
    • ELF Executable and Linkable format (generic) (4004/1) 100.00%
    File name:.i.elf
    File size:65'000 bytes
    MD5:dcf8c7dba337bb22e8ae8720c77134a8
    SHA1:6c3831a3062b6305e84a50e3dad17d2cb05bdf51
    SHA256:c496c4b0b56b950ce120177d70cf36bfffefe1595833fe5f0968d807df4b32e1
    SHA512:075fbbb25541dde654b67393e55247582759da863f215e74d044c683d6a4b6c78c32d8fdd1f3f70f8fa1664cdbc3a12ceea77a325060567d6a645d619994214d
    SSDEEP:1536:87vbq1lGAXSEYQjbChaAU2yU23M51DjZgSQAvcYkFb:8D+CAXFYQChaAUk5ljnQsK
    TLSH:6F5302D01B71178C5271E87539DE306F8124562F329A29101DA781CEFC1B213A9B7EFD
    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
    LOAD0x00x100000x100000x137e90x137e97.99690x5R E0x10000
    LOAD0x6fc0x506fc0x506fc0x00x00.00000x6RW 0x10000

    Download Network PCAP: filteredfull

    TimestampSource PortDest PortSource IPDest IP
    Mar 16, 2025 09:21:35.933060884 CET5676753192.168.2.158.8.8.8
    Mar 16, 2025 09:21:35.933109045 CET5963353192.168.2.158.8.8.8
    Mar 16, 2025 09:21:35.939285040 CET53596338.8.8.8192.168.2.15
    Mar 16, 2025 09:21:35.939785957 CET53567678.8.8.8192.168.2.15
    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Mar 16, 2025 09:21:35.933060884 CET192.168.2.158.8.8.80x6ae5Standard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Mar 16, 2025 09:21:35.933109045 CET192.168.2.158.8.8.80x2398Standard query (0)daisy.ubuntu.com28IN (0x0001)false
    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Mar 16, 2025 09:21:35.939785957 CET8.8.8.8192.168.2.150x6ae5No error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false
    Mar 16, 2025 09:21:35.939785957 CET8.8.8.8192.168.2.150x6ae5No error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false

    System Behavior

    Start time (UTC):08:21:34
    Start date (UTC):16/03/2025
    Path:/tmp/.i.elf
    Arguments:/tmp/.i.elf
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1