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Linux Analysis Report
arm5.elf

Overview

General Information

Sample name:arm5.elf
Analysis ID:1646381
MD5:dcac020572e14c87842eeff2041824eb
SHA1:eb6ba209d8bdf7cec04f387f38a526d90bb9df3b
SHA256:8d7527e8f1773383d762079abe0c3df2d9274b05b70d989e3b2a2523f7b7fdb1
Tags:elfuser-abuse_ch
Infos:

Detection

Mirai
Score:60
Range:0 - 100

Signatures

Multi AV Scanner detection for submitted file
Yara detected Mirai
Sample is packed with UPX
ELF contains segments with high entropy indicating compressed/encrypted content
Sample contains only a LOAD segment without any section mappings
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

RansomwareSpreadingPhishingBankerTrojan / BotAdwareSpywareExploiterEvaderMinercleansuspiciousmalicious
Joe Sandbox version:42.0.0 Malachite
Analysis ID:1646381
Start date and time:2025-03-24 00:18:01 +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:arm5.elf
Detection:MAL
Classification:mal60.troj.evad.linELF@0/0@0/0
Command:/tmp/arm5.elf
PID:6229
Exit Code:127
Exit Code Info:
Killed:False
Standard Output:

Standard Error:
  • system is lnxubuntu20
  • arm5.elf (PID: 6229, Parent: 6144, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/arm5.elf
  • cleanup
NameDescriptionAttributionBlogpost URLsLink
MiraiMirai is one of the first significant botnets targeting exposed networking devices running Linux. Found in August 2016 by MalwareMustDie, its name means "future" in Japanese. Nowadays it targets a wide range of networked embedded devices such as IP cameras, home routers (many vendors involved), and other IoT devices. Since the source code was published on "Hack Forums" many variants of the Mirai family appeared, infecting mostly home networks all around the world.No Attributionhttps://malpedia.caad.fkie.fraunhofer.de/details/elf.mirai
SourceRuleDescriptionAuthorStrings
6229.1.00007f1284017000.00007f128401d000.r-x.sdmpJoeSecurity_Mirai_6Yara detected MiraiJoe Security
    Process Memory Space: arm5.elf PID: 6229JoeSecurity_Mirai_6Yara detected MiraiJoe Security
      No Suricata rule has matched

      Click to jump to signature section

      Show All Signature Results

      AV Detection

      barindex
      Source: arm5.elfReversingLabs: Detection: 25%
      Source: global trafficTCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
      Source: global trafficTCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
      Source: global trafficTCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80
      Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.42
      Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.43
      Source: unknownTCP traffic detected without corresponding DNS query: 109.202.202.202
      Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.42
      Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.43
      Source: unknownTCP traffic detected without corresponding DNS query: 109.202.202.202
      Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.42
      Source: arm5.elf, 6229.1.00007f1284017000.00007f128401d000.r-x.sdmpString found in binary or memory: http://schemas.xmlsoap.org/soap/encoding/
      Source: arm5.elf, 6229.1.00007f1284017000.00007f128401d000.r-x.sdmpString found in binary or memory: http://schemas.xmlsoap.org/soap/envelope/
      Source: arm5.elfString found in binary or memory: http://upx.sf.net
      Source: unknownNetwork traffic detected: HTTP traffic on port 43928 -> 443
      Source: unknownNetwork traffic detected: HTTP traffic on port 42836 -> 443
      Source: LOAD without section mappingsProgram segment: 0x8000
      Source: classification engineClassification label: mal60.troj.evad.linELF@0/0@0/0

      Data Obfuscation

      barindex
      Source: initial sampleString containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
      Source: initial sampleString containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
      Source: initial sampleString containing UPX found: $Id: UPX 3.94 Copyright (C) 1996-2017 the UPX Team. All Rights Reserved. $
      Source: arm5.elfSubmission file: segment LOAD with 7.727 entropy (max. 8.0)
      Source: /tmp/arm5.elf (PID: 6229)Queries kernel information via 'uname': Jump to behavior
      Source: arm5.elf, 6229.1.00007ffe57e67000.00007ffe57e88000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/arm5.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/arm5.elf
      Source: arm5.elf, 6229.1.000055fd9c56d000.000055fd9c73b000.rw-.sdmpBinary or memory string: U!/etc/qemu-binfmt/arm
      Source: arm5.elf, 6229.1.000055fd9c56d000.000055fd9c73b000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
      Source: arm5.elf, 6229.1.00007ffe57e67000.00007ffe57e88000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm

      Stealing of Sensitive Information

      barindex
      Source: Yara matchFile source: 6229.1.00007f1284017000.00007f128401d000.r-x.sdmp, type: MEMORY
      Source: Yara matchFile source: Process Memory Space: arm5.elf PID: 6229, type: MEMORYSTR

      Remote Access Functionality

      barindex
      Source: Yara matchFile source: 6229.1.00007f1284017000.00007f128401d000.r-x.sdmp, type: MEMORY
      Source: Yara matchFile source: Process Memory Space: arm5.elf PID: 6229, type: MEMORYSTR
      ReconnaissanceResource DevelopmentInitial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionCommand and ControlExfiltrationImpact
      Gather Victim Identity InformationAcquire InfrastructureValid AccountsWindows Management InstrumentationPath InterceptionPath Interception11
      Obfuscated Files or Information
      OS Credential Dumping11
      Security Software Discovery
      Remote ServicesData from Local System1
      Encrypted Channel
      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: 1646381 Sample: arm5.elf Startdate: 24/03/2025 Architecture: LINUX Score: 60 8 109.202.202.202, 80 INIT7CH Switzerland 2->8 10 91.189.91.42, 443 CANONICAL-ASGB United Kingdom 2->10 12 91.189.91.43, 443 CANONICAL-ASGB United Kingdom 2->12 14 Multi AV Scanner detection for submitted file 2->14 16 Yara detected Mirai 2->16 18 Sample is packed with UPX 2->18 6 arm5.elf 2->6         started        signatures3 process4

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


      windows-stand
      SourceDetectionScannerLabelLink
      arm5.elf25%ReversingLabsLinux.Trojan.Mirai
      No Antivirus matches
      No Antivirus matches
      No Antivirus matches

      Download Network PCAP: filteredfull

      No contacted domains info
      NameSourceMaliciousAntivirus DetectionReputation
      http://upx.sf.netarm5.elffalse
        high
        http://schemas.xmlsoap.org/soap/encoding/arm5.elf, 6229.1.00007f1284017000.00007f128401d000.r-x.sdmpfalse
          high
          http://schemas.xmlsoap.org/soap/envelope/arm5.elf, 6229.1.00007f1284017000.00007f128401d000.r-x.sdmpfalse
            high
            • No. of IPs < 25%
            • 25% < No. of IPs < 50%
            • 50% < No. of IPs < 75%
            • 75% < No. of IPs
            IPDomainCountryFlagASNASN NameMalicious
            109.202.202.202
            unknownSwitzerland
            13030INIT7CHfalse
            91.189.91.43
            unknownUnited Kingdom
            41231CANONICAL-ASGBfalse
            91.189.91.42
            unknownUnited Kingdom
            41231CANONICAL-ASGBfalse
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                                                    No context
                                                    No context
                                                    No created / dropped files found
                                                    File type:ELF 32-bit LSB executable, ARM, version 1 (ARM), statically linked, no section header
                                                    Entropy (8bit):7.719900126913264
                                                    TrID:
                                                    • ELF Executable and Linkable format (generic) (4004/1) 100.00%
                                                    File name:arm5.elf
                                                    File size:16'044 bytes
                                                    MD5:dcac020572e14c87842eeff2041824eb
                                                    SHA1:eb6ba209d8bdf7cec04f387f38a526d90bb9df3b
                                                    SHA256:8d7527e8f1773383d762079abe0c3df2d9274b05b70d989e3b2a2523f7b7fdb1
                                                    SHA512:6e696c6a3011880a601243ee64f07484252a29b3fefa0e2f51595232b2809afd9b0a2fe7227ff39559c314b1b9ec9fd579f6e42d6066f68ab126b135276fd5bb
                                                    SSDEEP:384:W30dwljSuuhpbQnJCP0k3XNoccMtrR6RBQWyeAk/hTp/ftBi:dUipbQnJwTXNogtrGBByeAk/dRi
                                                    TLSH:D772C0BAA561DB1BFAC9C737DC4E28D49303393A41938062FF1AAE2152172CD5908F9C
                                                    File Content Preview:.ELF...a..........(.........4...........4. ...(......................=...=..............4...4...4...................Q.td................................UPX!X........`...`......{.........ELF.ra....(....d...4...^... ........{.......s.M..4...y..9........|[o?

                                                    ELF header

                                                    Class:ELF32
                                                    Data:2's complement, little endian
                                                    Version:1 (current)
                                                    Machine:ARM
                                                    Version Number:0x1
                                                    Type:EXEC (Executable file)
                                                    OS/ABI:ARM - ABI
                                                    ABI Version:0
                                                    Entry Point Address:0xb3d0
                                                    Flags:0x2
                                                    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
                                                    LOAD0x00x80000x80000x3d0b0x3d0b7.72700x5R E0x8000
                                                    LOAD0xd340x18d340x18d340x00x00.00000x6RW 0x8000
                                                    GNU_STACK0x00x00x00x00x00.00000x7RWE0x4

                                                    Download Network PCAP: filteredfull

                                                    • Total Packets: 7
                                                    • 443 (HTTPS)
                                                    • 80 (HTTP)
                                                    TimestampSource PortDest PortSource IPDest IP
                                                    Mar 24, 2025 00:18:41.550153971 CET43928443192.168.2.2391.189.91.42
                                                    Mar 24, 2025 00:18:47.181238890 CET42836443192.168.2.2391.189.91.43
                                                    Mar 24, 2025 00:18:48.461078882 CET4251680192.168.2.23109.202.202.202
                                                    Mar 24, 2025 00:19:01.771440983 CET43928443192.168.2.2391.189.91.42
                                                    Mar 24, 2025 00:19:14.057851076 CET42836443192.168.2.2391.189.91.43
                                                    Mar 24, 2025 00:19:18.153028011 CET4251680192.168.2.23109.202.202.202
                                                    Mar 24, 2025 00:19:42.725831985 CET43928443192.168.2.2391.189.91.42

                                                    System Behavior

                                                    Start time (UTC):23:18:39
                                                    Start date (UTC):23/03/2025
                                                    Path:/tmp/arm5.elf
                                                    Arguments:/tmp/arm5.elf
                                                    File size:4956856 bytes
                                                    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1