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Linux Analysis Report
sora.arm5.elf

Overview

General Information

Sample name:sora.arm5.elf
Analysis ID:1592470
MD5:72e562cd5165808264c81dc9068dbdf8
SHA1:ec9bb1b3198b9a851d6830a4c2b49ecd009fd88c
SHA256:83d3cf3a072a6c9e9630ba36f835077423f731512c8f0357c145fc778d49e769
Tags:elfuser-abuse_ch
Infos:

Detection

Mirai
Score:76
Range:0 - 100
Whitelisted:false

Signatures

Malicious sample detected (through community Yara rule)
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
Executes the "rm" command used to delete files or directories
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)
Yara signature match

Classification

Joe Sandbox version:42.0.0 Malachite
Analysis ID:1592470
Start date and time:2025-01-16 07:30:23 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 58s
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:sora.arm5.elf
Detection:MAL
Classification:mal76.troj.evad.linELF@0/0@0/0
Command:/tmp/sora.arm5.elf
PID:6260
Exit Code:127
Exit Code Info:
Killed:False
Standard Output:

Standard Error:
  • system is lnxubuntu20
  • dash New Fork (PID: 6248, Parent: 4332)
  • rm (PID: 6248, Parent: 4332, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.MhHoogAIg2 /tmp/tmp.tQSm5Jtagy /tmp/tmp.1R6aAT6CSo
  • dash New Fork (PID: 6249, Parent: 4332)
  • rm (PID: 6249, Parent: 4332, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.MhHoogAIg2 /tmp/tmp.tQSm5Jtagy /tmp/tmp.1R6aAT6CSo
  • sora.arm5.elf (PID: 6260, Parent: 6181, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/sora.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
6260.1.00007f4ce0017000.00007f4ce0026000.r-x.sdmpJoeSecurity_Mirai_9Yara detected MiraiJoe Security
    6260.1.00007f4ce0017000.00007f4ce0026000.r-x.sdmpJoeSecurity_Mirai_5Yara detected MiraiJoe Security
      6260.1.00007f4ce0017000.00007f4ce0026000.r-x.sdmpMAL_ELF_LNX_Mirai_Oct10_2Detects ELF malware Mirai relatedFlorian Roth
      • 0xd9a0:$c01: 50 4F 53 54 20 2F 63 64 6E 2D 63 67 69 2F 00 00 20 48 54 54 50 2F 31 2E 31 0D 0A 55 73 65 72 2D 41 67 65 6E 74 3A 20 00 0D 0A 48 6F 73 74 3A
      Process Memory Space: sora.arm5.elf PID: 6260JoeSecurity_Mirai_9Yara detected MiraiJoe Security
        No Suricata rule has matched

        Click to jump to signature section

        Show All Signature Results

        AV Detection

        barindex
        Source: sora.arm5.elfVirustotal: Detection: 46%Perma Link
        Source: sora.arm5.elfReversingLabs: Detection: 57%
        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: 91.189.91.42
        Source: unknownTCP traffic detected without corresponding DNS query: 109.202.202.202
        Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.43
        Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.42
        Source: sora.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

        System Summary

        barindex
        Source: 6260.1.00007f4ce0017000.00007f4ce0026000.r-x.sdmp, type: MEMORYMatched rule: Detects ELF malware Mirai related Author: Florian Roth
        Source: LOAD without section mappingsProgram segment: 0x8000
        Source: 6260.1.00007f4ce0017000.00007f4ce0026000.r-x.sdmp, type: MEMORYMatched rule: MAL_ELF_LNX_Mirai_Oct10_2 date = 2018-10-27, hash1 = fa0018e75f503f9748a5de0d14d4358db234f65e28c31c8d5878cc58807081c9, author = Florian Roth, description = Detects ELF malware Mirai related, reference = Internal Research
        Source: classification engineClassification label: mal76.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: /usr/bin/dash (PID: 6248)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.MhHoogAIg2 /tmp/tmp.tQSm5Jtagy /tmp/tmp.1R6aAT6CSoJump to behavior
        Source: /usr/bin/dash (PID: 6249)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.MhHoogAIg2 /tmp/tmp.tQSm5Jtagy /tmp/tmp.1R6aAT6CSoJump to behavior
        Source: sora.arm5.elfSubmission file: segment LOAD with 7.9312 entropy (max. 8.0)
        Source: /tmp/sora.arm5.elf (PID: 6260)Queries kernel information via 'uname': Jump to behavior
        Source: sora.arm5.elf, 6260.1.00007ffee0aec000.00007ffee0b0d000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/sora.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/sora.arm5.elf
        Source: sora.arm5.elf, 6260.1.00005585d00b5000.00005585d02e3000.rw-.sdmpBinary or memory string: U!/etc/qemu-binfmt/arm
        Source: sora.arm5.elf, 6260.1.00005585d00b5000.00005585d02e3000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
        Source: sora.arm5.elf, 6260.1.00007ffee0aec000.00007ffee0b0d000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm

        Stealing of Sensitive Information

        barindex
        Source: Yara matchFile source: 6260.1.00007f4ce0017000.00007f4ce0026000.r-x.sdmp, type: MEMORY
        Source: Yara matchFile source: Process Memory Space: sora.arm5.elf PID: 6260, type: MEMORYSTR

        Remote Access Functionality

        barindex
        Source: Yara matchFile source: 6260.1.00007f4ce0017000.00007f4ce0026000.r-x.sdmp, type: MEMORY
        Source: Yara matchFile source: Process Memory Space: sora.arm5.elf PID: 6260, 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 Scripts1
        File Deletion
        LSASS 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
        SourceDetectionScannerLabelLink
        sora.arm5.elf46%VirustotalBrowse
        sora.arm5.elf58%ReversingLabsLinux.Trojan.Mirai
        No Antivirus matches
        No Antivirus matches
        No Antivirus matches
        No contacted domains info
        NameSourceMaliciousAntivirus DetectionReputation
        http://upx.sf.netsora.arm5.elffalse
          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
          MatchAssociated Sample Name / URLSHA 256DetectionThreat NameLinkContext
          109.202.202.202kpLwzBouH4.elfGet hashmaliciousUnknownBrowse
          • ch.archive.ubuntu.com/ubuntu/pool/main/f/firefox/firefox_92.0%2bbuild3-0ubuntu0.20.04.1_amd64.deb
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                          dlr.arm5.elfGet hashmaliciousUnknownBrowse
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                              91.189.91.42byte.arm7.elfGet hashmaliciousMirai, OkiruBrowse
                                byte.arm6.elfGet hashmaliciousMirai, OkiruBrowse
                                  byte.mips.elfGet hashmaliciousMirai, OkiruBrowse
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                                                  CANONICAL-ASGBbyte.arm7.elfGet hashmaliciousMirai, OkiruBrowse
                                                  • 91.189.91.42
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                                                  • 91.189.91.42
                                                  na.elfGet hashmaliciousPrometeiBrowse
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                                                  na.elfGet hashmaliciousPrometeiBrowse
                                                  • 91.189.91.42
                                                  byte.sh4.elfGet hashmaliciousMirai, OkiruBrowse
                                                  • 91.189.91.42
                                                  byte.arm.elfGet hashmaliciousMirai, OkiruBrowse
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                                                  • 91.189.91.42
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                                                  • 185.125.190.26
                                                  CANONICAL-ASGBbyte.arm7.elfGet hashmaliciousMirai, OkiruBrowse
                                                  • 91.189.91.42
                                                  byte.arm6.elfGet hashmaliciousMirai, OkiruBrowse
                                                  • 91.189.91.42
                                                  byte.mips.elfGet hashmaliciousMirai, OkiruBrowse
                                                  • 91.189.91.42
                                                  na.elfGet hashmaliciousPrometeiBrowse
                                                  • 91.189.91.42
                                                  na.elfGet hashmaliciousPrometeiBrowse
                                                  • 91.189.91.42
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                                                  • 91.189.91.42
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                                                  • 91.189.91.42
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                                                  • 91.189.91.42
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                                                  • 185.125.190.26
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                                                  • 185.125.190.26
                                                  INIT7CHbyte.arm7.elfGet hashmaliciousMirai, OkiruBrowse
                                                  • 109.202.202.202
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                                                  • 109.202.202.202
                                                  byte.mips.elfGet hashmaliciousMirai, OkiruBrowse
                                                  • 109.202.202.202
                                                  na.elfGet hashmaliciousPrometeiBrowse
                                                  • 109.202.202.202
                                                  na.elfGet hashmaliciousPrometeiBrowse
                                                  • 109.202.202.202
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                                                  • 109.202.202.202
                                                  byte.arm.elfGet hashmaliciousMirai, OkiruBrowse
                                                  • 109.202.202.202
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                                                  • 109.202.202.202
                                                  dlr.arm5.elfGet hashmaliciousUnknownBrowse
                                                  • 109.202.202.202
                                                  dlr.x86.elfGet hashmaliciousMirai, OkiruBrowse
                                                  • 109.202.202.202
                                                  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):7.927869975657495
                                                  TrID:
                                                  • ELF Executable and Linkable format (generic) (4004/1) 100.00%
                                                  File name:sora.arm5.elf
                                                  File size:24'536 bytes
                                                  MD5:72e562cd5165808264c81dc9068dbdf8
                                                  SHA1:ec9bb1b3198b9a851d6830a4c2b49ecd009fd88c
                                                  SHA256:83d3cf3a072a6c9e9630ba36f835077423f731512c8f0357c145fc778d49e769
                                                  SHA512:cd43f7cdb4e2a2d29048f89af8c869fc778b529acb16541813927e683d74d41271f213c27ebd27ed64ef778707237169f546608b015d0f33e20144b16c019b3f
                                                  SSDEEP:384:4GaKXlJIDFUS0Mggks3aIrokYVDoDDRRKj55N7LB9U+BK/GhymdGUop5hu79:4GaKQFH0rs3zWoDDRsjt7LB9U+BXs3UR
                                                  TLSH:D7B2D0A48BA4570AC670B435A27CCF926E3B15E4C1F539262B2093FCE69145632FCAC7
                                                  File Content Preview:.ELF...a..........(.........4...........4. ...(....................._^.._^...............i..........................Q.td..............................CvUPX!....................q..........?.E.h;.}...^.........O#..&...^.W...4.s...irL.Y.n.i.+..r....4......@.

                                                  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:0xccb0
                                                  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
                                                  LOAD0x00x80000x80000x5e5f0x5e5f7.93120x5R E0x8000
                                                  LOAD0x69e80x1e9e80x1e9e80x00x00.00000x6RW 0x8000
                                                  GNU_STACK0x00x00x00x00x00.00000x7RWE0x4
                                                  TimestampSource PortDest PortSource IPDest IP
                                                  Jan 16, 2025 07:31:29.431786060 CET43928443192.168.2.2391.189.91.42
                                                  Jan 16, 2025 07:31:35.062977076 CET42836443192.168.2.2391.189.91.43
                                                  Jan 16, 2025 07:31:49.397093058 CET43928443192.168.2.2391.189.91.42
                                                  Jan 16, 2025 07:31:55.540189981 CET4251680192.168.2.23109.202.202.202
                                                  Jan 16, 2025 07:32:01.683329105 CET42836443192.168.2.2391.189.91.43
                                                  Jan 16, 2025 07:32:30.351397991 CET43928443192.168.2.2391.189.91.42

                                                  System Behavior

                                                  Start time (UTC):06:31:21
                                                  Start date (UTC):16/01/2025
                                                  Path:/usr/bin/dash
                                                  Arguments:-
                                                  File size:129816 bytes
                                                  MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                                  Start time (UTC):06:31:21
                                                  Start date (UTC):16/01/2025
                                                  Path:/usr/bin/rm
                                                  Arguments:rm -f /tmp/tmp.MhHoogAIg2 /tmp/tmp.tQSm5Jtagy /tmp/tmp.1R6aAT6CSo
                                                  File size:72056 bytes
                                                  MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                                                  Start time (UTC):06:31:21
                                                  Start date (UTC):16/01/2025
                                                  Path:/usr/bin/dash
                                                  Arguments:-
                                                  File size:129816 bytes
                                                  MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                                  Start time (UTC):06:31:21
                                                  Start date (UTC):16/01/2025
                                                  Path:/usr/bin/rm
                                                  Arguments:rm -f /tmp/tmp.MhHoogAIg2 /tmp/tmp.tQSm5Jtagy /tmp/tmp.1R6aAT6CSo
                                                  File size:72056 bytes
                                                  MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                                                  Start time (UTC):06:31:29
                                                  Start date (UTC):16/01/2025
                                                  Path:/tmp/sora.arm5.elf
                                                  Arguments:/tmp/sora.arm5.elf
                                                  File size:4956856 bytes
                                                  MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1