Joe Sandbox Cloud Basic Analysis Report
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Linux Analysis Report
efea6.elf

Overview

General Information

Sample name:efea6.elf
Analysis ID:1644586
MD5:b4bf131e36eb976e1958ca76af16102a
SHA1:dd785e1e1a14c94687d84bfcb7649bb763575b3f
SHA256:d4c116ba08bacbe22b0ace4c0b5a276a58cfaf821affe69ad6b53f0a93a4c271
Tags:user-elfdigest
Infos:

Detection

Score:48
Range:0 - 100

Signatures

Multi AV Scanner detection for submitted file
Executes the "systemctl" command used for controlling the systemd system and service manager
Reads system version information
Sample has stripped symbol table
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:1644586
Start date and time:2025-03-20 17:50:13 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 5m 15s
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:efea6.elf
Detection:MAL
Classification:mal48.linELF@0/0@4/0

Runtime Messages

Command:/tmp/efea6.elf
PID:5718
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
  • efea6.elf (PID: 5718, Parent: 5523, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/efea6.elf
  • systemd New Fork (PID: 5782, Parent: 1)
  • snap-failure (PID: 5782, Parent: 1, MD5: 69136a7d575731ce62349f2e4d3e5c36) Arguments: /usr/lib/snapd/snap-failure snapd
    • systemctl (PID: 5796, Parent: 5782, MD5: 4deddfb6741481f68aeac522cc26ff4b) Arguments: systemctl stop snapd.socket
  • cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

  • • AV Detection
  • • Networking
  • • System Summary
  • • Persistence and Installation Behavior
  • • Malware Analysis System Evasion

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Source: efea6.elfVirustotal: Detection: 25%Perma Link
Source: efea6.elfReversingLabs: Detection: 33%
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: ELF static info symbol of initial sample.symtab present: no
Source: classification engineClassification label: mal48.linELF@0/0@4/0
Source: /usr/lib/snapd/snap-failure (PID: 5796)Systemctl executable: /usr/bin/systemctl -> systemctl stop snapd.socketJump to behavior
Source: /usr/lib/snapd/snap-failure (PID: 5782)Reads version info: /proc/versionJump to behavior
Source: /tmp/efea6.elf (PID: 5718)Queries kernel information via 'uname': Jump to behavior
Source: efea6.elf, 5718.1.0000558438dcf000.0000558438efd000.rw-.sdmpBinary or memory string: U!/etc/qemu-binfmt/arm
Source: efea6.elf, 5718.1.00007ffe52d14000.00007ffe52d35000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/efea6.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/efea6.elf
Source: efea6.elf, 5718.1.0000558438dcf000.0000558438efd000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: efea6.elf, 5718.1.00007ffe52d14000.00007ffe52d35000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: efea6.elf, 5718.1.00007ffe52d14000.00007ffe52d35000.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 Instrumentation1
Systemd Service		1
Systemd Service		Direct Volume AccessOS 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 Memory1
System Information Discovery		Remote 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: 1644586 Sample: efea6.elf Startdate: 20/03/2025 Architecture: LINUX Score: 48 15 daisy.ubuntu.com 2->15 17 Multi AV Scanner detection for submitted file 2->17 7 systemd snap-failure 2->7         started        9 efea6.elf 2->9         started        signatures3 process4 process5 11 snap-failure systemctl 7->11         started        13 snap-failure 7->13         started       

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

SourceDetectionScannerLabelLink
efea6.elf25%VirustotalBrowse
efea6.elf33%ReversingLabsLinux.Backdoor.Mirai

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.comweje64.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    sshd.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    dlr.sh4.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    arc.elfGet hashmaliciousMiraiBrowse
    • 162.213.35.24
    dlr.spc.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    dlr.ppc.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    sh4.elfGet hashmaliciousGafgyt, MiraiBrowse
    • 162.213.35.25
    mips.elfGet hashmaliciousGafgyt, MiraiBrowse
    • 162.213.35.25
    x86.elfGet hashmaliciousGafgyt, MiraiBrowse
    • 162.213.35.24
    resgod.spc.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 LSB executable, ARM, EABI4 version 1 (SYSV), statically linked, stripped
    Entropy (8bit):5.552069334142911
    TrID:
    • ELF Executable and Linkable format (generic) (4004/1) 100.00%
    File name:efea6.elf
    File size:166'780 bytes
    MD5:b4bf131e36eb976e1958ca76af16102a
    SHA1:dd785e1e1a14c94687d84bfcb7649bb763575b3f
    SHA256:d4c116ba08bacbe22b0ace4c0b5a276a58cfaf821affe69ad6b53f0a93a4c271
    SHA512:61232005e2341945e2ee5019a517d3eb20f25d96ffed1fc7b1ad24f6fa8e9f76a97c3c01ed3ac0cf0d781b72b20d36fcaea7da0ca183cc25d9ba0bf9dc3b7f26
    SSDEEP:3072:UOH9TAS2WYN7xuXfBtXECaqokv9esZ30EPR2XUF:UOH9mjNwX5tXzaSksZnPR2k
    TLSH:1DF30956B8819B15D5D112BAFE1E428E33131B78E3EE72139D246F207B8A87F0E3B515
    File Content Preview:.ELF..............(.....T...4...t.......4. ...(.....................,?..,?...............@...@...@...H..............Q.td..................................-...L..................@-.,@...0....S..... 0....S.........../..0...0...@..../..........@....-.@0....S

    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 - System V
    ABI Version:0
    Entry Point Address:0x8154
    Flags:0x4000002
    ELF Header Size:52
    Program Header Offset:52
    Program Header Size:32
    Number of Program Headers:3
    Section Header Offset:166260
    Section Header Size:40
    Number of Section Headers:13
    Header String Table Index:12

    Sections

    NameTypeAddressOffsetSizeEntSizeFlagsFlags DescriptionLinkInfoAlign
    NULL0x00x00x00x00x0000
    .initPROGBITS0x80940x940x100x00x6AX004
    .textPROGBITS0x80b00xb00x202a80x00x6AX0016
    .finiPROGBITS0x283580x203580x100x00x6AX004
    .rodataPROGBITS0x283680x203680x3bc40x00x2A008
    .init_arrayINIT_ARRAY0x340040x240080x80x00x3WA004
    .fini_arrayFINI_ARRAY0x3400c0x240100x40x00x3WA004
    .data.rel.roPROGBITS0x340140x240180x780x00x3WA004
    .gotPROGBITS0x3408c0x240900x11c0x40x3WA004
    .dataPROGBITS0x341c00x241c40x47340x00x3WA0032
    .bssNOBITS0x388f80x288f80xc8900x00x3WA008
    .ARM.attributesARM_ATTRIBUTES0x00x288f80x100x00x0001
    .shstrtabSTRTAB0x00x289080x6a0x00x0001

    Program Segments

    TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
    LOAD0x00x80000x80000x23f2c0x23f2c5.96170x5R E0x8000.init .text .fini .rodata
    LOAD0x240040x340040x340000x48f40x111840.59080x6RW 0x8000.init_array .fini_array .data.rel.ro .got .data .bss
    GNU_STACK0x00x00x00x00x00.00000x7RWE0x4

    Network Behavior

    Download Network PCAP: filtered – full

    TimestampSource PortDest PortSource IPDest IP
    Mar 20, 2025 17:52:00.331361055 CET3481053192.168.2.138.8.8.8
    Mar 20, 2025 17:52:00.434355021 CET53348108.8.8.8192.168.2.13
    Mar 20, 2025 17:52:00.434506893 CET3481053192.168.2.138.8.8.8
    Mar 20, 2025 17:52:00.434506893 CET3481053192.168.2.138.8.8.8
    Mar 20, 2025 17:52:00.538573027 CET53348108.8.8.8192.168.2.13
    Mar 20, 2025 17:52:00.538592100 CET53348108.8.8.8192.168.2.13
    Mar 20, 2025 17:52:00.538779020 CET3481053192.168.2.138.8.8.8
    Mar 20, 2025 17:52:00.539002895 CET3481053192.168.2.138.8.8.8
    Mar 20, 2025 17:52:00.641283035 CET53348108.8.8.8192.168.2.13
    Mar 20, 2025 17:52:00.641395092 CET3481053192.168.2.138.8.8.8
    Mar 20, 2025 17:52:02.644445896 CET53348108.8.8.8192.168.2.13
    Mar 20, 2025 17:52:02.644831896 CET3481053192.168.2.138.8.8.8
    Mar 20, 2025 17:52:02.748907089 CET53348108.8.8.8192.168.2.13
    TimestampSource PortDest PortSource IPDest IP
    Mar 20, 2025 17:51:55.326735020 CET5268153192.168.2.131.1.1.1
    Mar 20, 2025 17:51:55.326735020 CET4019753192.168.2.131.1.1.1
    Mar 20, 2025 17:51:55.433670998 CET53401971.1.1.1192.168.2.13

    DNS Queries

    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Mar 20, 2025 17:51:55.326735020 CET192.168.2.131.1.1.10xe7b2Standard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Mar 20, 2025 17:51:55.326735020 CET192.168.2.131.1.1.10x28a9Standard query (0)daisy.ubuntu.com28IN (0x0001)false
    Mar 20, 2025 17:52:00.434506893 CET192.168.2.138.8.8.80xe7b2Standard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Mar 20, 2025 17:52:00.539002895 CET192.168.2.138.8.8.80x897fStandard query (0)daisy.ubuntu.com28IN (0x0001)false

    DNS Answers

    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Mar 20, 2025 17:52:00.538592100 CET8.8.8.8192.168.2.130xe7b2No error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false
    Mar 20, 2025 17:52:00.538592100 CET8.8.8.8192.168.2.130xe7b2No error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false

    System Behavior

    General

    Start time (UTC):16:51:51
    Start date (UTC):20/03/2025
    Path:/tmp/efea6.elf
    Arguments:/tmp/efea6.elf
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

    File Activities

    Process Activities

    System Activities


    General

    Start time (UTC):16:52:31
    Start date (UTC):20/03/2025
    Path:/usr/lib/systemd/systemd
    Arguments:-
    File size:1620224 bytes
    MD5 hash:9b2bec7092a40488108543f9334aab75

    Process Activities


    General

    Start time (UTC):16:52:31
    Start date (UTC):20/03/2025
    Path:/usr/lib/snapd/snap-failure
    Arguments:/usr/lib/snapd/snap-failure snapd
    File size:4764904 bytes
    MD5 hash:69136a7d575731ce62349f2e4d3e5c36

    File Activities

    Process Activities


    General

    Start time (UTC):16:52:31
    Start date (UTC):20/03/2025
    Path:/usr/lib/snapd/snap-failure
    Arguments:-
    File size:4764904 bytes
    MD5 hash:69136a7d575731ce62349f2e4d3e5c36

    Process Activities


    General

    Start time (UTC):16:52:31
    Start date (UTC):20/03/2025
    Path:/usr/bin/systemctl
    Arguments:systemctl stop snapd.socket
    File size:996584 bytes
    MD5 hash:4deddfb6741481f68aeac522cc26ff4b

    File Activities

    Network Activities


    General

    Start time (UTC):16:52:32
    Start date (UTC):20/03/2025
    Path:/usr/lib/snapd/snap-failure
    Arguments:-
    File size:4764904 bytes
    MD5 hash:69136a7d575731ce62349f2e4d3e5c36

    Process Activities