Joe Sandbox Cloud Basic Analysis Report
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Linux Analysis Report
i.elf

Overview

General Information

Sample name:i.elf
Analysis ID:1647885
MD5:5c4afc81224ef711d01b7b758ee879a1
SHA1:d9ca8be5bb16be9d2c5fd6ec6a454e8f864c3845
SHA256:63fed137b37986710cc3edd4f870d1c07e35fb0b24e8d3f341edf26c7ae454ac
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

General Information

Joe Sandbox version:42.0.0 Malachite
Analysis ID:1647885
Start date and time:2025-03-25 11:02:23 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 16s
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

Runtime Messages

Command:/tmp/i.elf
PID:5424
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

Process Tree

  • system is lnxubuntu20
  • i.elf (PID: 5424, Parent: 5347, MD5: 0083f1f0e77be34ad27f849842bbb00c) Arguments: /tmp/i.elf
  • cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

  • • AV Detection
  • • Networking
  • • System Summary
  • • Hooking and other Techniques for Hiding and Protection
  • • Malware Analysis System Evasion

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Source: i.elfReversingLabs: Detection: 44%
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: 0x100000
Source: classification engineClassification label: mal48.linELF@0/0@2/0
Source: i.elfSubmission file: segment LOAD with 7.9964 entropy (max. 8.0)
Source: /tmp/i.elf (PID: 5424)Queries kernel information via 'uname': Jump to behavior
Source: i.elf, 5424.1.00007ffee3077000.00007ffee3098000.rw-.sdmpBinary or memory string: Wx86_64/usr/bin/qemu-mips/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, 5424.1.000055c205e73000.000055c205efa000.rw-.sdmpBinary or memory string: U!/etc/qemu-binfmt/mips
Source: i.elf, 5424.1.000055c205e73000.000055c205efa000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/mips
Source: i.elf, 5424.1.00007ffee3077000.00007ffee3098000.rw-.sdmpBinary or memory string: /usr/bin/qemu-mips
Source: i.elf, 5424.1.00007ffee3077000.00007ffee3098000.rw-.sdmpBinary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Mitre Att&ck Matrix

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

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: 1647885 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

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

SourceDetectionScannerLabelLink
i.elf44%ReversingLabsLinux.Infostealer.Berbew

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.comaarch64.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
    arm5.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    arm7.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    arm.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25

    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 MSB executable, MIPS, MIPS-I version 1 (SYSV), statically linked, no section header
    Entropy (8bit):7.996395313470565
    TrID:
    • ELF Executable and Linkable format (Linux) (4029/14) 50.16%
    • ELF Executable and Linkable format (generic) (4004/1) 49.84%
    File name:i.elf
    File size:78'064 bytes
    MD5:5c4afc81224ef711d01b7b758ee879a1
    SHA1:d9ca8be5bb16be9d2c5fd6ec6a454e8f864c3845
    SHA256:63fed137b37986710cc3edd4f870d1c07e35fb0b24e8d3f341edf26c7ae454ac
    SHA512:faea8a92f569be4e7f5007aaa62c7d88fc477ed17f8ad7994eab6b86cd6f589d1920fbe33a2d91b7397deb8bba7aca92237046cf200ae0dc7b7bafdd4fcbf925
    SSDEEP:1536:yYI0ARqw1qAEW67UIWi7M8gmfmJo0WgswnD6Efyq8PxlRkp2K3/JV:yYI0ARqw1qAEv7UIFM8oJorFquyjkRkl
    TLSH:3B73121623A925A1663146F1E3FD2F88F94D6A6C8FF1AC24BC117CA8E93336D1CD9518
    File Content Preview:.ELF....................../....4.........4. ...(......................Bd..Bd.................G...G.................................................^.......?.E.h4...@b..) ..]..0...a.t<..mc.zy/..>..!c...gM\<j..W`xD'..}...\..].j.L.u...S..i...../..F...@`..'k.

    Static ELF Info

    ELF header

    Class:ELF32
    Data:2's complement, big endian
    Version:1 (current)
    Machine:MIPS R3000
    Version Number:0x1
    Type:EXEC (Executable file)
    OS/ABI:UNIX - System V
    ABI Version:0
    Entry Point Address:0x112fe8
    Flags:0x1007
    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

    Program Segments

    TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
    LOAD0x00x1000000x1000000x142640x142647.99640x5R E0x10000
    LOAD0xa6c00x47a6c00x47a6c00x00x00.00000x6RW 0x10000

    Network Behavior

    Download Network PCAP: filtered – full

    TimestampSource PortDest PortSource IPDest IP
    Mar 25, 2025 11:03:05.975420952 CET4447153192.168.2.131.1.1.1
    Mar 25, 2025 11:03:05.975477934 CET4467653192.168.2.131.1.1.1
    Mar 25, 2025 11:03:05.982713938 CET53444711.1.1.1192.168.2.13
    Mar 25, 2025 11:03:05.983493090 CET53446761.1.1.1192.168.2.13

    DNS Queries

    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Mar 25, 2025 11:03:05.975420952 CET192.168.2.131.1.1.10x3901Standard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Mar 25, 2025 11:03:05.975477934 CET192.168.2.131.1.1.10x1f45Standard query (0)daisy.ubuntu.com28IN (0x0001)false

    DNS Answers

    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Mar 25, 2025 11:03:05.982713938 CET1.1.1.1192.168.2.130x3901No error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false
    Mar 25, 2025 11:03:05.982713938 CET1.1.1.1192.168.2.130x3901No error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false

    System Behavior

    General

    Start time (UTC):10:03:02
    Start date (UTC):25/03/2025
    Path:/tmp/i.elf
    Arguments:/tmp/i.elf
    File size:5777432 bytes
    MD5 hash:0083f1f0e77be34ad27f849842bbb00c

    File Activities

    Process Activities

    System Activities