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Linux Analysis Report
i.elf

Overview

General Information

Sample name:i.elf
Analysis ID:1647071
MD5:b4470e0da768bdc8a349e7cce04e9566
SHA1:36127076db4133408f9a65ad45aad0533c778cd7
SHA256:6dfef63f421142fe5a5cb866d7c8ed5b455426cc333154c3ae90ac96c182bece
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:1647071
Start date and time:2025-03-24 15:15:20 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 25s
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:5434
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: 5434, Parent: 5354, MD5: 0083f1f0e77be34ad27f849842bbb00c) 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: 57%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: 0x100000
Source: classification engineClassification label: mal56.linELF@0/0@2/0
Source: i.elfSubmission file: segment LOAD with 7.9947 entropy (max. 8.0)
Source: /tmp/i.elf (PID: 5434)Queries kernel information via 'uname': Jump to behavior
Source: i.elf, 5434.1.00007fff2cfe4000.00007fff2d005000.rw-.sdmpBinary or memory string: x86_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, 5434.1.000055c96d684000.000055c96d70b000.rw-.sdmpBinary or memory string: U!/etc/qemu-binfmt/mips
Source: i.elf, 5434.1.000055c96d684000.000055c96d70b000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/mips
Source: i.elf, 5434.1.00007fff2cfe4000.00007fff2d005000.rw-.sdmpBinary or memory string: /usr/bin/qemu-mips
Source: i.elf, 5434.1.00007fff2cfe4000.00007fff2d005000.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: 1647071 Sample: i.elf Startdate: 24/03/2025 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%VirustotalBrowse
i.elf58%ReversingLabsLinux.Infostealer.Berbew
i.elf100%AviraBDS/Berbew.vzbjd
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
    • 162.213.35.24
    sh4.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    arm6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    arm.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    arm5.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    tftp.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    aarch64.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    g4za.arm5.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    g4za.arm6.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    .i.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    No context
    No context
    No context
    No created / dropped files found
    File type:ELF 32-bit MSB executable, MIPS, MIPS-I version 1 (SYSV), statically linked, no section header
    Entropy (8bit):7.994664198126255
    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:44'992 bytes
    MD5:b4470e0da768bdc8a349e7cce04e9566
    SHA1:36127076db4133408f9a65ad45aad0533c778cd7
    SHA256:6dfef63f421142fe5a5cb866d7c8ed5b455426cc333154c3ae90ac96c182bece
    SHA512:6dd15b96f99f0fe20622bdedf77b89f915ec2a0f2200c779097de22b2dcf73c35ceb2654b38d4c01ead45ef384d9ca5ac161bef45564001c2ddc70ac2f8de153
    SSDEEP:768:YTYIDfYG6ZmewZ59+Nw1qsREH20j7UNqVwi7M8ghFM04ZTzEsDO:yYI0ARqw1qAEW67UIWi7M8gmfO
    TLSH:0613028237953F72D52188F4D7BCEFCA614A7D94AFA9181BBC113598747135C28C9C1E
    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.

    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
    TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
    LOAD0x00x1000000x1000000x142640x142647.99470x5R E0x10000
    LOAD0xa6c00x47a6c00x47a6c00x00x00.00000x6RW 0x10000

    Download Network PCAP: filteredfull

    TimestampSource PortDest PortSource IPDest IP
    Mar 24, 2025 15:16:08.440064907 CET4993753192.168.2.131.1.1.1
    Mar 24, 2025 15:16:08.440128088 CET4014853192.168.2.131.1.1.1
    Mar 24, 2025 15:16:08.538194895 CET53401481.1.1.1192.168.2.13
    Mar 24, 2025 15:16:08.538878918 CET53499371.1.1.1192.168.2.13
    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Mar 24, 2025 15:16:08.440064907 CET192.168.2.131.1.1.10xa92aStandard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Mar 24, 2025 15:16:08.440128088 CET192.168.2.131.1.1.10x238eStandard query (0)daisy.ubuntu.com28IN (0x0001)false
    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Mar 24, 2025 15:16:08.538878918 CET1.1.1.1192.168.2.130xa92aNo error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false
    Mar 24, 2025 15:16:08.538878918 CET1.1.1.1192.168.2.130xa92aNo error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false

    System Behavior

    Start time (UTC):14:16:06
    Start date (UTC):24/03/2025
    Path:/tmp/i.elf
    Arguments:/tmp/i.elf
    File size:5777432 bytes
    MD5 hash:0083f1f0e77be34ad27f849842bbb00c