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Linux Analysis Report
sora.arm7.elf

Overview

General Information

Sample name:sora.arm7.elf
Analysis ID:1587505
MD5:f32f84146d04e92d8e7f6637f054e239
SHA1:793a1c75a5076a910a8a69dc4a5acbc08f728ecc
SHA256:fc3bf82d5d84ecf0a7f166289d03ff1df91874b02e9e94cc4ff32d2de00acad7
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:1587505
Start date and time:2025-01-10 13:42:05 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 45s
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.arm7.elf
Detection:MAL
Classification:mal76.troj.evad.linELF@0/0@0/0
Command:/tmp/sora.arm7.elf
PID:6260
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
  • dash New Fork (PID: 6235, Parent: 4332)
  • rm (PID: 6235, Parent: 4332, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.WPmIeiiZHJ /tmp/tmp.cuEl6ZYtOt /tmp/tmp.PrzLk3x7Z7
  • dash New Fork (PID: 6236, Parent: 4332)
  • rm (PID: 6236, Parent: 4332, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.WPmIeiiZHJ /tmp/tmp.cuEl6ZYtOt /tmp/tmp.PrzLk3x7Z7
  • sora.arm7.elf (PID: 6260, Parent: 6168, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/sora.arm7.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
6260.1.00007f850c017000.00007f850c02e000.r-x.sdmpJoeSecurity_Mirai_9Yara detected MiraiJoe Security
    6260.1.00007f850c017000.00007f850c02e000.r-x.sdmpJoeSecurity_Mirai_5Yara detected MiraiJoe Security
      6260.1.00007f850c017000.00007f850c02e000.r-x.sdmpMAL_ELF_LNX_Mirai_Oct10_2Detects ELF malware Mirai relatedFlorian Roth
      • 0x152b8:$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.arm7.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.arm7.elfVirustotal: Detection: 48%Perma Link
        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: unknownTCP traffic detected without corresponding DNS query: 91.189.91.43
        Source: sora.arm7.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: 6260.1.00007f850c017000.00007f850c02e000.r-x.sdmp, type: MEMORYMatched rule: Detects ELF malware Mirai related Author: Florian Roth
        Source: LOAD without section mappingsProgram segment: 0x8000
        Source: 6260.1.00007f850c017000.00007f850c02e000.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: 6235)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.WPmIeiiZHJ /tmp/tmp.cuEl6ZYtOt /tmp/tmp.PrzLk3x7Z7Jump to behavior
        Source: /usr/bin/dash (PID: 6236)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.WPmIeiiZHJ /tmp/tmp.cuEl6ZYtOt /tmp/tmp.PrzLk3x7Z7Jump to behavior
        Source: sora.arm7.elfSubmission file: segment LOAD with 7.9651 entropy (max. 8.0)
        Source: /tmp/sora.arm7.elf (PID: 6260)Queries kernel information via 'uname': Jump to behavior
        Source: sora.arm7.elf, 6260.1.00007ffd7c525000.00007ffd7c546000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/sora.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/sora.arm7.elf
        Source: sora.arm7.elf, 6260.1.0000555f1b393000.0000555f1b581000.rw-.sdmpBinary or memory string: _U!/etc/qemu-binfmt/arm
        Source: sora.arm7.elf, 6260.1.0000555f1b393000.0000555f1b581000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
        Source: sora.arm7.elf, 6260.1.00007ffd7c525000.00007ffd7c546000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
        Source: sora.arm7.elf, 6260.1.00007ffd7c525000.00007ffd7c546000.rw-.sdmpBinary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

        Stealing of Sensitive Information

        barindex
        Source: Yara matchFile source: 6260.1.00007f850c017000.00007f850c02e000.r-x.sdmp, type: MEMORY
        Source: Yara matchFile source: Process Memory Space: sora.arm7.elf PID: 6260, type: MEMORYSTR

        Remote Access Functionality

        barindex
        Source: Yara matchFile source: 6260.1.00007f850c017000.00007f850c02e000.r-x.sdmp, type: MEMORY
        Source: Yara matchFile source: Process Memory Space: sora.arm7.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.arm7.elf48%VirustotalBrowse
        No Antivirus matches
        No Antivirus matches
        No Antivirus matches
        No contacted domains info
        NameSourceMaliciousAntivirus DetectionReputation
        http://upx.sf.netsora.arm7.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
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                                                  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):7.978733317682272
                                                  TrID:
                                                  • ELF Executable and Linkable format (generic) (4004/1) 100.00%
                                                  File name:sora.arm7.elf
                                                  File size:52'512 bytes
                                                  MD5:f32f84146d04e92d8e7f6637f054e239
                                                  SHA1:793a1c75a5076a910a8a69dc4a5acbc08f728ecc
                                                  SHA256:fc3bf82d5d84ecf0a7f166289d03ff1df91874b02e9e94cc4ff32d2de00acad7
                                                  SHA512:c15e7503e2fd1cf8b188240ac1a9c7bd1b992e8c3a0b971c3344d05c96a52c20bafc75ca4ff63772d4bd8dfb1d6e4430c8b706814fcb38b01de05804daa30234
                                                  SSDEEP:1536:C9O/sqIMe4rj+1ekULcPqF1aBexo4opKZb4:C9O/sqo4rSevLGqFUFZ
                                                  TLSH:1833F272E772BDB8D19096331839D89196DDA66D9E0E30E41C70137D3F9A82B49F0BC4
                                                  File Content Preview:.ELF..............(.........4...........4. ...(.....................................................................Q.td............................>. NUPX!.........2...2......j..........?.E.h;....#..$...o...T[_.....*).......X...hb..F.....(........e...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:0xff98
                                                  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
                                                  LOAD0x00x80000x80000x91850x91857.96510x5R E0x8000
                                                  LOAD0x17940x297940x297940x00x00.00000x6RW 0x8000
                                                  GNU_STACK0x00x00x00x00x00.00000x7RWE0x4
                                                  TimestampSource PortDest PortSource IPDest IP
                                                  Jan 10, 2025 13:42:59.424092054 CET43928443192.168.2.2391.189.91.42
                                                  Jan 10, 2025 13:43:04.799443960 CET42836443192.168.2.2391.189.91.43
                                                  Jan 10, 2025 13:43:05.567246914 CET4251680192.168.2.23109.202.202.202
                                                  Jan 10, 2025 13:43:20.669358969 CET43928443192.168.2.2391.189.91.42
                                                  Jan 10, 2025 13:43:30.907737970 CET42836443192.168.2.2391.189.91.43
                                                  Jan 10, 2025 13:43:35.003149033 CET4251680192.168.2.23109.202.202.202
                                                  Jan 10, 2025 13:44:01.623552084 CET43928443192.168.2.2391.189.91.42
                                                  Jan 10, 2025 13:44:22.100625992 CET42836443192.168.2.2391.189.91.43

                                                  System Behavior

                                                  Start time (UTC):12:42:54
                                                  Start date (UTC):10/01/2025
                                                  Path:/usr/bin/dash
                                                  Arguments:-
                                                  File size:129816 bytes
                                                  MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                                  Start time (UTC):12:42:54
                                                  Start date (UTC):10/01/2025
                                                  Path:/usr/bin/rm
                                                  Arguments:rm -f /tmp/tmp.WPmIeiiZHJ /tmp/tmp.cuEl6ZYtOt /tmp/tmp.PrzLk3x7Z7
                                                  File size:72056 bytes
                                                  MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                                                  Start time (UTC):12:42:54
                                                  Start date (UTC):10/01/2025
                                                  Path:/usr/bin/dash
                                                  Arguments:-
                                                  File size:129816 bytes
                                                  MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                                  Start time (UTC):12:42:54
                                                  Start date (UTC):10/01/2025
                                                  Path:/usr/bin/rm
                                                  Arguments:rm -f /tmp/tmp.WPmIeiiZHJ /tmp/tmp.cuEl6ZYtOt /tmp/tmp.PrzLk3x7Z7
                                                  File size:72056 bytes
                                                  MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                                                  Start time (UTC):12:42:59
                                                  Start date (UTC):10/01/2025
                                                  Path:/tmp/sora.arm7.elf
                                                  Arguments:/tmp/sora.arm7.elf
                                                  File size:4956856 bytes
                                                  MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1