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Linux Analysis Report
arm7.elf

Overview

General Information

Sample name:arm7.elf
Analysis ID:1644234
MD5:ed5880b520100ebe5438d3b431724d11
SHA1:eddc15b9ff4d8ec0c37ec1cdd19aa102c76f4123
SHA256:cc6619458ff03f1e02a12264a924b07d3aeabfee83592f392f42e5ee027b8af0
Tags:elfMiraiuser-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:1644234
Start date and time:2025-03-20 13:22:56 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 39s
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:arm7.elf
Detection:MAL
Classification:mal56.linELF@0/0@2/0
Command:/tmp/arm7.elf
PID:5643
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
  • arm7.elf (PID: 5643, Parent: 5560, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/arm7.elf
  • cleanup
No yara matches
No Suricata rule has matched

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Source: arm7.elfAvira: detected
Source: arm7.elfVirustotal: Detection: 36%Perma Link
Source: arm7.elfReversingLabs: Detection: 44%
Source: global trafficDNS traffic detected: DNS query: daisy.ubuntu.com
Source: LOAD without section mappingsProgram segment: 0x8000
Source: classification engineClassification label: mal56.linELF@0/0@2/0
Source: arm7.elfSubmission file: segment LOAD with 7.9746 entropy (max. 8.0)
Source: /tmp/arm7.elf (PID: 5643)Queries kernel information via 'uname': Jump to behavior
Source: arm7.elf, 5643.1.00005581e87d9000.00005581e8907000.rw-.sdmpBinary or memory string: U!/etc/qemu-binfmt/arm
Source: arm7.elf, 5643.1.00005581e87d9000.00005581e8907000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: arm7.elf, 5643.1.00007ffe8a22b000.00007ffe8a24c000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: arm7.elf, 5643.1.00007ffe8a22b000.00007ffe8a24c000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/arm7.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/arm7.elf
Source: arm7.elf, 5643.1.00007ffe8a22b000.00007ffe8a24c000.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: 1644234 Sample: arm7.elf Startdate: 20/03/2025 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 arm7.elf 2->6         started        signatures3 process4

This section contains all screenshots as thumbnails, including those not shown in the slideshow.


windows-stand
SourceDetectionScannerLabelLink
arm7.elf37%VirustotalBrowse
arm7.elf44%ReversingLabsLinux.Backdoor.Mirai
arm7.elf100%AviraEXP/ELF.Agent.F.14
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
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    • 162.213.35.24
    rtk.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.24
    zte.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    root.elfGet hashmaliciousUnknownBrowse
    • 162.213.35.25
    .5r3fqt67ew531has4231.sh4.elfGet hashmaliciousGafgyt, Mirai, Moobot, OkiruBrowse
    • 162.213.35.24
    yakuza.ppc.elfGet hashmaliciousGafgyt, MiraiBrowse
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    yakuza.arm6.elfGet hashmaliciousGafgyt, MiraiBrowse
    • 162.213.35.24
    No context
    No context
    No context
    No created / dropped files found
    File type:ELF 32-bit LSB executable, ARM, EABI4 version 1 (GNU/Linux), statically linked, no section header
    Entropy (8bit):7.984259784385397
    TrID:
    • ELF Executable and Linkable format (generic) (4004/1) 100.00%
    File name:arm7.elf
    File size:62'904 bytes
    MD5:ed5880b520100ebe5438d3b431724d11
    SHA1:eddc15b9ff4d8ec0c37ec1cdd19aa102c76f4123
    SHA256:cc6619458ff03f1e02a12264a924b07d3aeabfee83592f392f42e5ee027b8af0
    SHA512:5840ddbdbc5ba448a8afff614376772b33bca86265568ca0e8101419cd2d1380286a27cc35268296d96e916f5baed7fc1f3b1bdb2ede975a78f24218d8d94f1c
    SSDEEP:1536:iCfwV0knaC2NjcjkHK8QVxde0CPZbZOfTpySaPBRmeZn9ppLFAk:tO0kcjqkq8QLaZbZ4pyfbm+V
    TLSH:A753F2A1F2D45E765BA23D13CB9D0364E7532FDD436AB626D6A00A34F0E7E42983903D
    File Content Preview:.ELF..............(.........4...........4. ...(.....................................................................Q.td............................"...YTS.|........y...y......k..........?.E.h;....#..$...o....2....w...G..../.]..h....ki.....6../.FKRZ.v..{p

    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:0x11e9c
    Flags:0x4000002
    ELF Header Size:52
    Program Header Offset:52
    Program Header Size:32
    Number of Program Headers:3
    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
    LOAD0x00x80000x80000xb00b0xb00b7.97460x5R E0x8000
    LOAD0x00x180000x180000x00xf5980.00000x6RW 0x8000
    GNU_STACK0x00x00x00x00x00.00000x7RWE0x4

    Download Network PCAP: filteredfull

    TimestampSource PortDest PortSource IPDest IP
    Mar 20, 2025 13:23:59.059263945 CET4516253192.168.2.148.8.8.8
    Mar 20, 2025 13:23:59.148832083 CET53451628.8.8.8192.168.2.14
    Mar 20, 2025 13:23:59.148861885 CET53451628.8.8.8192.168.2.14
    Mar 20, 2025 13:23:59.148930073 CET4516253192.168.2.148.8.8.8
    Mar 20, 2025 13:23:59.148930073 CET4516253192.168.2.148.8.8.8
    Mar 20, 2025 13:23:59.149010897 CET4516253192.168.2.148.8.8.8
    Mar 20, 2025 13:23:59.243870974 CET53451628.8.8.8192.168.2.14
    Mar 20, 2025 13:23:59.243951082 CET53451628.8.8.8192.168.2.14
    Mar 20, 2025 13:23:59.244021893 CET4516253192.168.2.148.8.8.8
    Mar 20, 2025 13:24:01.250221014 CET53451628.8.8.8192.168.2.14
    Mar 20, 2025 13:24:01.250519037 CET4516253192.168.2.148.8.8.8
    Mar 20, 2025 13:24:01.361926079 CET53451628.8.8.8192.168.2.14
    TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
    Mar 20, 2025 13:23:59.059263945 CET192.168.2.148.8.8.80x50e8Standard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
    Mar 20, 2025 13:23:59.149010897 CET192.168.2.148.8.8.80xc7ffStandard query (0)daisy.ubuntu.com28IN (0x0001)false
    TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
    Mar 20, 2025 13:23:59.148861885 CET8.8.8.8192.168.2.140x50e8No error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false
    Mar 20, 2025 13:23:59.148861885 CET8.8.8.8192.168.2.140x50e8No error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false

    System Behavior

    Start time (UTC):12:23:57
    Start date (UTC):20/03/2025
    Path:/tmp/arm7.elf
    Arguments:/tmp/arm7.elf
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1