Joe Sandbox Cloud Basic Analysis Report

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Linux Analysis Report
.i.elf

Overview

General Information

Sample name:.i.elf
Analysis ID:1546476
MD5:2b4764e9e98801e22876b216a3ca7d84
SHA1:9d7476831794fa883dbf42fe9711112cad043138
SHA256:d6da675777279bd7c79a3a25e15f0a5f078fa190b1dbb857f7011850eb0f84ba
Tags:elfuser-abuse_ch
Infos:

Detection

Score:48
Range:0 - 100
Whitelisted:false

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

General Information

Joe Sandbox version:41.0.0 Charoite
Analysis ID:1546476
Start date and time:2024-11-01 00:32:08 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 33s
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@0/2@2/0

Warnings

  • VT rate limit hit for: .i.elf

Runtime Messages

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

Process Tree

  • system is lnxubuntu20
  • .i.elf (PID: 5434, Parent: 5357, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/.i.elf
  • sshd New Fork (PID: 5494, Parent: 936)
  • sshd (PID: 5494, Parent: 936, MD5: dbca7a6bbf7bf57fedac243d4b2cb340) Arguments: /usr/sbin/sshd -D -R
  • sshd New Fork (PID: 5495, Parent: 936)
  • sshd (PID: 5495, Parent: 936, MD5: dbca7a6bbf7bf57fedac243d4b2cb340) Arguments: /usr/sbin/sshd -D -R
    • sshd New Fork (PID: 5496, Parent: 5495)
  • sshd New Fork (PID: 5499, Parent: 936)
  • sshd (PID: 5499, Parent: 936, MD5: dbca7a6bbf7bf57fedac243d4b2cb340) Arguments: /usr/sbin/sshd -D -R
    • sshd New Fork (PID: 5500, Parent: 5499)
  • cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Multi AV Scanner detection for submitted file
Source: .i.elfReversingLabs: Detection: 57%
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: 0x10000
Source: classification engineClassification label: mal48.linELF@0/2@2/0
Source: .i.elfSubmission file: segment LOAD with 7.9974 entropy (max. 8.0)
Source: /tmp/.i.elf (PID: 5434)Queries kernel information via 'uname': Jump to behavior
Source: .i.elf, 5434.1.00005568774b9000.000055687765a000.rw-.sdmpBinary or memory string: MwhU!/etc/qemu-binfmt/arm
Source: .i.elf, 5434.1.00005568774b9000.000055687765a000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: .i.elf, 5434.1.00007ffdf1583000.00007ffdf15a4000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: .i.elf, 5434.1.00007ffdf1583000.00007ffdf15a4000.rw-.sdmpBinary or memory string: 9x86_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, 5434.1.00007ffdf1583000.00007ffdf15a4000.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: 1546476 Sample: .i.elf Startdate: 01/11/2024 Architecture: LINUX Score: 48 19 daisy.ubuntu.com 2->19 21 Multi AV Scanner detection for submitted file 2->21 7 sshd sshd 2->7         started        9 sshd sshd 2->9         started        11 sshd sshd 2->11         started        13 .i.elf 2->13         started        signatures3 process4 process5 15 sshd 7->15         started        17 sshd 9->17         started       

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

SourceDetectionScannerLabelLink
.i.elf58%ReversingLabsLinux.Infostealer.Berbew

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Contacted Domains

NameIPActiveMaliciousAntivirus DetectionReputation
daisy.ubuntu.com
162.213.35.24
truefalse
    		unknown

    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.comboatnet.arm6.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    boatnet.spc.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    boatnet.mips.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    boatnet.mpsl.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    boatnet.arm7.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    boatnet.sh4.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    boatnet.ppc.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    boatnet.x86_64.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    main_arm6.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.25
    arm6.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24

    ASNs

    ⊘No context

    JA3 Fingerprints

    ⊘No context

    Dropped Files

    ⊘No context

    Created / dropped Files

    /var/log/btmp

    Download File
    Process:/usr/sbin/sshd
    File Type:data
    Category:dropped
    Size (bytes):384
    Entropy (8bit):0.8735982127940438
    Encrypted:false
    SSDEEP:3:X4aDLwbXWXCl/lN2/l:XdMbG2to/
    MD5:E95AB6DF6F61D4CFFAFAD747EE583FBB
    SHA1:E2B0F911A678013AF6E2E13A3534B520BF146ECD
    SHA-256:31095989CAB872640C229ECC25A58881EAB9B0A0C6AC4F9DB622769BE16FF781
    SHA-512:168245897E23725AA34AA00A8F0505F09F37FDFD3CDAD479A139F6AE7FFB2FB4E9AC77FBE7012FD79A069A01E380FF686DCE40DF6D1FC99750921AE61C6BF7B6
    Malicious:false
    Reputation:low
    Preview:....{...ssh:notty...........................root............................192.168.2.23..............................................................................................................................................................................................................................................................$g........................................

    Static File Info

    General

    File type:ELF 32-bit LSB executable, ARM, EABI5 version 1 (GNU/Linux), statically linked, no section header
    Entropy (8bit):7.997414038106231
    TrID:
    • ELF Executable and Linkable format (generic) (4004/1) 100.00%
    File name:.i.elf
    File size:75'168 bytes
    MD5:2b4764e9e98801e22876b216a3ca7d84
    SHA1:9d7476831794fa883dbf42fe9711112cad043138
    SHA256:d6da675777279bd7c79a3a25e15f0a5f078fa190b1dbb857f7011850eb0f84ba
    SHA512:fb514d28ede84176416f77ae7a849b1b2be2852c3f61fa4d6d334c55825e7d8a1ef0be5fc4a37ffa1c391b4bd5df6bd47d992d89b0a776b4a44b671d47c26dee
    SSDEEP:1536:87vbq1lGAXSEYQjbChaAU2yU23M51DjZgSQAvcYkFtZTjzBN:8D+CAXFYQChaAUk5ljnQss3
    TLSH:597312E017B5178C1276E8393BDE306F8024622A339A29246DD791CEF917713A973DBD
    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'_

    Static ELF Info

    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

    Program Segments

    TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
    LOAD0x00x100000x100000x137e90x137e97.99740x5R E0x10000
    LOAD0x6fc0x506fc0x506fc0x00x00.00000x6RW 0x10000

    Network Behavior

    Network Port Distribution

    UDP Packets

    TimestampSource PortDest PortSource IPDest IP
    Nov 1, 2024 00:32:57.024388075 CET5387453192.168.2.131.1.1.1
    Nov 1, 2024 00:32:57.024445057 CET5610553192.168.2.131.1.1.1
    Nov 1, 2024 00:32:57.032280922 CET53561051.1.1.1192.168.2.13
    Nov 1, 2024 00:32:57.045340061 CET53538741.1.1.1192.168.2.13

    DNS Queries

    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Nov 1, 2024 00:32:57.024388075 CET192.168.2.131.1.1.10xe39cStandard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Nov 1, 2024 00:32:57.024445057 CET192.168.2.131.1.1.10xf20Standard query (0)daisy.ubuntu.com28IN (0x0001)false

    DNS Answers

    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Nov 1, 2024 00:32:57.045340061 CET1.1.1.1192.168.2.130xe39cNo error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false
    Nov 1, 2024 00:32:57.045340061 CET1.1.1.1192.168.2.130xe39cNo error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false

    System Behavior

    General

    Start time (UTC):23:32:54
    Start date (UTC):31/10/2024
    Path:/tmp/.i.elf
    Arguments:/tmp/.i.elf
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

    Chronological Activities


    General

    Start time (UTC):23:33:17
    Start date (UTC):31/10/2024
    Path:/usr/sbin/sshd
    Arguments:-
    File size:876328 bytes
    MD5 hash:dbca7a6bbf7bf57fedac243d4b2cb340

    Chronological Activities


    General

    Start time (UTC):23:33:17
    Start date (UTC):31/10/2024
    Path:/usr/sbin/sshd
    Arguments:/usr/sbin/sshd -D -R
    File size:876328 bytes
    MD5 hash:dbca7a6bbf7bf57fedac243d4b2cb340

    Chronological Activities


    General

    Start time (UTC):23:33:17
    Start date (UTC):31/10/2024
    Path:/usr/sbin/sshd
    Arguments:-
    File size:876328 bytes
    MD5 hash:dbca7a6bbf7bf57fedac243d4b2cb340

    Chronological Activities


    General

    Start time (UTC):23:33:17
    Start date (UTC):31/10/2024
    Path:/usr/sbin/sshd
    Arguments:/usr/sbin/sshd -D -R
    File size:876328 bytes
    MD5 hash:dbca7a6bbf7bf57fedac243d4b2cb340

    Chronological Activities


    General

    Start time (UTC):23:33:17
    Start date (UTC):31/10/2024
    Path:/usr/sbin/sshd
    Arguments:-
    File size:876328 bytes
    MD5 hash:dbca7a6bbf7bf57fedac243d4b2cb340

    Chronological Activities


    General

    Start time (UTC):23:33:22
    Start date (UTC):31/10/2024
    Path:/usr/sbin/sshd
    Arguments:-
    File size:876328 bytes
    MD5 hash:dbca7a6bbf7bf57fedac243d4b2cb340

    Chronological Activities


    General

    Start time (UTC):23:33:22
    Start date (UTC):31/10/2024
    Path:/usr/sbin/sshd
    Arguments:/usr/sbin/sshd -D -R
    File size:876328 bytes
    MD5 hash:dbca7a6bbf7bf57fedac243d4b2cb340

    Chronological Activities


    General

    Start time (UTC):23:33:22
    Start date (UTC):31/10/2024
    Path:/usr/sbin/sshd
    Arguments:-
    File size:876328 bytes
    MD5 hash:dbca7a6bbf7bf57fedac243d4b2cb340

    Chronological Activities