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Linux Analysis Report
i.elf

Overview

General Information

Sample name:i.elf
Analysis ID:1643484
MD5:03579345dcdfe6ed9dfda8df664db3bf
SHA1:13346e47750ad37758b79af35982e042b0918fe1
SHA256:cc07f0d93599efb8563a67c11205f3cbae529f0ff6f5fd039e2f1f74bd26304c
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:1643484
Start date and time:2025-03-19 20:57:36 +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:5417
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: 5417, Parent: 5339, 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.elfVirustotal: Detection: 39%Perma Link
Source: i.elfReversingLabs: Detection: 41%
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 7.9912 entropy (max. 8.0)
Source: /tmp/i.elf (PID: 5417)Queries kernel information via 'uname': Jump to behavior
Source: i.elf, 5417.1.00007ffcab2ef000.00007ffcab310000.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, 5417.1.000055a5968ea000.000055a596971000.rw-.sdmpBinary or memory string: U!/etc/qemu-binfmt/mips
Source: i.elf, 5417.1.000055a5968ea000.000055a596971000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/mips
Source: i.elf, 5417.1.00007ffcab2ef000.00007ffcab310000.rw-.sdmpBinary or memory string: /usr/bin/qemu-mips
Source: i.elf, 5417.1.00007ffcab2ef000.00007ffcab310000.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: 1643484 Sample: i.elf Startdate: 19/03/2025 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.elf40%VirustotalBrowse
i.elf42%ReversingLabsLinux.Infostealer.Berbew
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.comjkse.arm7.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    jkse.ppc.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    jkse.arm6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    jkse.arm.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    jkse.x86.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    nklarm6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    zerarm6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    jklarm6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    resgod.ppc.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    resgod.arm.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    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):7.991219333708544
    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:29'104 bytes
    MD5:03579345dcdfe6ed9dfda8df664db3bf
    SHA1:13346e47750ad37758b79af35982e042b0918fe1
    SHA256:cc07f0d93599efb8563a67c11205f3cbae529f0ff6f5fd039e2f1f74bd26304c
    SHA512:f47b177d6a9e131223f9c08e74e286ab01ca269e633e60b5752f157b80d4a61aca623e5f30db7563bfe0217c5a929adaf55231048f53e7020eae89b9b6b84eee
    SSDEEP:384:YTYXvQDuYY2xZ6VTgDK4mpwTl5yejHSDeWBbo7hcXBOo3g1qs9LrEQSXm0j7M5N8:YTYIDfYG6ZmewZ59+Nw1qsREH20j7UN8
    TLSH:4BD2F1D333943B13E1A269F4E3BDAFCA61163D649FFE142B9050362270B311D5A88C6B
    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
    LOAD0x00x1000000x1000000x142640x142647.99120x5R E0x10000
    LOAD0xa6c00x47a6c00x47a6c00x00x00.00000x6RW 0x10000

    Download Network PCAP: filteredfull

    TimestampSource PortDest PortSource IPDest IP
    Mar 19, 2025 20:58:22.612859964 CET6082553192.168.2.138.8.8.8
    Mar 19, 2025 20:58:22.612860918 CET3661753192.168.2.138.8.8.8
    Mar 19, 2025 20:58:22.710310936 CET53366178.8.8.8192.168.2.13
    Mar 19, 2025 20:58:22.710371971 CET53608258.8.8.8192.168.2.13
    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Mar 19, 2025 20:58:22.612859964 CET192.168.2.138.8.8.80x278cStandard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Mar 19, 2025 20:58:22.612860918 CET192.168.2.138.8.8.80xf328Standard query (0)daisy.ubuntu.com28IN (0x0001)false
    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Mar 19, 2025 20:58:22.710371971 CET8.8.8.8192.168.2.130x278cNo error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false
    Mar 19, 2025 20:58:22.710371971 CET8.8.8.8192.168.2.130x278cNo error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false

    System Behavior

    Start time (UTC):19:58:20
    Start date (UTC):19/03/2025
    Path:/tmp/i.elf
    Arguments:/tmp/i.elf
    File size:5777432 bytes
    MD5 hash:0083f1f0e77be34ad27f849842bbb00c