Edit tour

Linux Analysis Report
.i.elf

Overview

General Information

Sample name:.i.elf
Analysis ID:1646119
MD5:b7bd8c2f2a8a6c5b5b6abde9dd464e45
SHA1:38bff29d205bca1a244a50de29e0666bf6806947
SHA256:404d195d5e3536933413f19e53307a14b099ba7872f9b6a4794dc09795570f03
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:1646119
Start date and time:2025-03-23 10:57:11 +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:5429
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: 5429, Parent: 5355, 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: 58%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 7.9971 entropy (max. 8.0)
Source: /tmp/.i.elf (PID: 5429)Queries kernel information via 'uname': Jump to behavior
Source: .i.elf, 5429.1.000055f394aec000.000055f394b73000.rw-.sdmpBinary or memory string: U!/etc/qemu-binfmt/mips
Source: .i.elf, 5429.1.000055f394aec000.000055f394b73000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/mips
Source: .i.elf, 5429.1.00007ffd13429000.00007ffd1344a000.rw-.sdmpBinary or memory string: /usr/bin/qemu-mips
Source: .i.elf, 5429.1.00007ffd13429000.00007ffd1344a000.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, 5429.1.00007ffd13429000.00007ffd1344a000.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: 1646119 Sample: .i.elf Startdate: 23/03/2025 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.elf59%VirustotalBrowse
.i.elf58%ReversingLabsLinux.Infostealer.Berbew
.i.elf100%AviraLINUX/Hajime.rguvn
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.comdrea4.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    efea6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    boatnet.ppc.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    boatnet.m68k.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    boatnet.arm7.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    boatnet.x86.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    boatnet.sh4.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    boatnet.arm6.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    boatnet.mpsl.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    boatnet.spc.elfGet hashmaliciousMiraiBrowse
    • 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):7.997085555911882
    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:75'924 bytes
    MD5:b7bd8c2f2a8a6c5b5b6abde9dd464e45
    SHA1:38bff29d205bca1a244a50de29e0666bf6806947
    SHA256:404d195d5e3536933413f19e53307a14b099ba7872f9b6a4794dc09795570f03
    SHA512:9afa4c10e1008e5348c0a9fce5be839971fa2b837cac3989c73318ac212f5e6bea48c3235f54cd354db710c4e6a6aa4ce66a108ba02d88fa187ea3bc432bd0ca
    SSDEEP:1536:yYI0ARqw1qAEW67UIWi7M8gmfmJo0WgswnD6Efyq8PxlRkp2K3/Js:yYI0ARqw1qAEv7UIFM8oJorFquyjkRk8
    TLSH:EB73121613A9296262314AF1D7FE6F88E50D2A6C8FF1AC24BC217C6CED3236D2CD5519
    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
    LOAD0x00x1000000x1000000x142640x142647.99710x5R E0x10000
    LOAD0xa6c00x47a6c00x47a6c00x00x00.00000x6RW 0x10000

    Download Network PCAP: filteredfull

    TimestampSource PortDest PortSource IPDest IP
    Mar 23, 2025 10:57:55.144814014 CET3700653192.168.2.131.1.1.1
    Mar 23, 2025 10:57:55.144814014 CET5149353192.168.2.131.1.1.1
    Mar 23, 2025 10:57:55.244385958 CET53370061.1.1.1192.168.2.13
    Mar 23, 2025 10:57:55.244410038 CET53514931.1.1.1192.168.2.13
    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Mar 23, 2025 10:57:55.144814014 CET192.168.2.131.1.1.10xd634Standard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Mar 23, 2025 10:57:55.144814014 CET192.168.2.131.1.1.10x38a9Standard query (0)daisy.ubuntu.com28IN (0x0001)false
    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Mar 23, 2025 10:57:55.244385958 CET1.1.1.1192.168.2.130xd634No error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false
    Mar 23, 2025 10:57:55.244385958 CET1.1.1.1192.168.2.130xd634No error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false

    System Behavior

    Start time (UTC):09:57:53
    Start date (UTC):23/03/2025
    Path:/tmp/.i.elf
    Arguments:/tmp/.i.elf
    File size:5777432 bytes
    MD5 hash:0083f1f0e77be34ad27f849842bbb00c