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Linux Analysis Report
jkse.arm6.elf

Overview

General Information

Sample name:jkse.arm6.elf
Analysis ID:1643422
MD5:4f9bd5199c820276a44ececc580ae6f6
SHA1:36f105f231c988d59da746f9f4a873905599ac11
SHA256:5647f319df716f59a847fbe68417833890f5d20ce1d9b99d60b6bd4d67cc4342
Tags:elfuser-abuse_ch
Infos:

Detection

Score:48
Range:0 - 100

Signatures

Multi AV Scanner detection for submitted file
Sample contains strings that are potentially command strings
Sample has stripped symbol table
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:1643422
Start date and time:2025-03-19 20:26:08 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 40s
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:jkse.arm6.elf
Detection:MAL
Classification:mal48.linELF@0/0@2/0
Command:/tmp/jkse.arm6.elf
PID:5435
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
  • jkse.arm6.elf (PID: 5435, Parent: 5355, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/jkse.arm6.elf
  • cleanup
No yara matches
No Suricata rule has matched

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Source: jkse.arm6.elfVirustotal: Detection: 45%Perma Link
Source: jkse.arm6.elfReversingLabs: Detection: 47%
Source: global trafficTCP traffic: 192.168.2.13:48202 -> 185.125.190.26:443
Source: unknownTCP traffic detected without corresponding DNS query: 185.125.190.26
Source: unknownTCP traffic detected without corresponding DNS query: 185.125.190.26
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: jkse.arm6.elfString found in binary or memory: http://196.251.81.246/a
Source: unknownNetwork traffic detected: HTTP traffic on port 48202 -> 443
Source: Initial samplePotential command found: GET /set_ftp.cgi?loginuse=
Source: Initial samplePotential command found: GET /ftptest.cgi?loginuse=
Source: Initial samplePotential command found: GET login.cgi HTTP/1.0
Source: Initial samplePotential command found: GET /set_ftp.cgi?loginuse=&loginpas=&next_url=ftp.htm&port=21&user=ftp&pwd=ftp&dir=/&mode=PORT&upload_interval=0&svr=%24%28echo+-e+cd+/tmp+>>+/tmp/t%29 HTTP/1.0
Source: Initial samplePotential command found: GET /ftptest.cgi?loginuse=GET login.cgi HTTP/1.0
Source: ELF static info symbol of initial sample.symtab present: no
Source: classification engineClassification label: mal48.linELF@0/0@2/0
Source: /tmp/jkse.arm6.elf (PID: 5435)Queries kernel information via 'uname': Jump to behavior
Source: jkse.arm6.elf, 5435.1.00005578fa2c3000.00005578fa3f1000.rw-.sdmpBinary or memory string: xU!/etc/qemu-binfmt/arm
Source: jkse.arm6.elf, 5435.1.00005578fa2c3000.00005578fa3f1000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: jkse.arm6.elf, 5435.1.00007ffe4199a000.00007ffe419bb000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: jkse.arm6.elf, 5435.1.00007ffe4199a000.00007ffe419bb000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/jkse.arm6.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/jkse.arm6.elf
Source: jkse.arm6.elf, 5435.1.00007ffe4199a000.00007ffe419bb000.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 Accounts1
Command and Scripting Interpreter
Path InterceptionPath InterceptionDirect Volume AccessOS 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
Non-Application Layer Protocol
Exfiltration Over BluetoothNetwork Denial of Service
Email AddressesDNS ServerDomain AccountsAtLogon Script (Windows)Logon Script (Windows)Obfuscated Files or InformationSecurity Account ManagerQuery RegistrySMB/Windows Admin SharesData from Network Shared Drive2
Application Layer Protocol
Automated ExfiltrationData Encrypted for Impact
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: 1643422 Sample: jkse.arm6.elf Startdate: 19/03/2025 Architecture: LINUX Score: 48 8 185.125.190.26, 443 CANONICAL-ASGB United Kingdom 2->8 10 daisy.ubuntu.com 2->10 12 Multi AV Scanner detection for submitted file 2->12 6 jkse.arm6.elf 2->6         started        signatures3 process4
SourceDetectionScannerLabelLink
jkse.arm6.elf45%VirustotalBrowse
jkse.arm6.elf47%ReversingLabsLinux.Trojan.Mirai
No Antivirus matches
No Antivirus matches
No Antivirus matches

Download Network PCAP: filteredfull

NameIPActiveMaliciousAntivirus DetectionReputation
daisy.ubuntu.com
162.213.35.25
truefalse
    high
    NameSourceMaliciousAntivirus DetectionReputation
    http://196.251.81.246/ajkse.arm6.elffalse
      high
      • No. of IPs < 25%
      • 25% < No. of IPs < 50%
      • 50% < No. of IPs < 75%
      • 75% < No. of IPs
      IPDomainCountryFlagASNASN NameMalicious
      185.125.190.26
      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 (SYSV), statically linked, stripped
                          Entropy (8bit):6.107479793628966
                          TrID:
                          • ELF Executable and Linkable format (generic) (4004/1) 100.00%
                          File name:jkse.arm6.elf
                          File size:54'540 bytes
                          MD5:4f9bd5199c820276a44ececc580ae6f6
                          SHA1:36f105f231c988d59da746f9f4a873905599ac11
                          SHA256:5647f319df716f59a847fbe68417833890f5d20ce1d9b99d60b6bd4d67cc4342
                          SHA512:9d1312b2ea5e441a211d932f7308878b4fa13be92073d41fac912713f8a73d5d074944507a72fd147a11f0f0316401101302778338c74c1ac510ae17d2e8fda4
                          SSDEEP:1536:WRncmmUubxkaCtxj1ITiK/rVp2/Xyb5iYO:lmTUOanrVp2/Xybk5
                          TLSH:6733F85AB9819F11D5C2117AFE1E118E73130B7CE3DEB3229E24AF2167C796B0E3A415
                          File Content Preview:.ELF..............(.....T...4...,.......4. ...(.........................................................4{..........Q.td..................................-...L..................@-.,@...0....S..... 0....S.........../..0...0...@..../...............-.@0....S

                          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:54060
                          Section Header Size:40
                          Number of Section Headers:12
                          Header String Table Index:11
                          NameTypeAddressOffsetSizeEntSizeFlagsFlags DescriptionLinkInfoAlign
                          NULL0x00x00x00x00x0000
                          .initPROGBITS0x80940x940x100x00x6AX004
                          .textPROGBITS0x80b00xb00xb8600x00x6AX0016
                          .finiPROGBITS0x139100xb9100x100x00x6AX004
                          .rodataPROGBITS0x139200xb9200x15c80x00x2A008
                          .init_arrayINIT_ARRAY0x1d0040xd0080x40x00x3WA004
                          .fini_arrayFINI_ARRAY0x1d0080xd00c0x40x00x3WA004
                          .gotPROGBITS0x1d0100xd0140x780x40x3WA004
                          .dataPROGBITS0x1d0880xd08c0x2300x00x3WA004
                          .bssNOBITS0x1d2b80xd2bc0xf8800x00x3WA004
                          .ARM.attributesARM_ATTRIBUTES0x00xd2bc0x100x00x0001
                          .shstrtabSTRTAB0x00xd2cc0x5d0x00x0001
                          TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
                          LOAD0x00x80000x80000xcee80xcee86.15720x5R E0x8000.init .text .fini .rodata
                          LOAD0xd0040x1d0040x1d0000x2b80x17b343.75040x6RW 0x8000.init_array .fini_array .got .data .bss
                          GNU_STACK0x00x00x00x00x00.00000x7RWE0x4

                          Download Network PCAP: filteredfull

                          • Total Packets: 4
                          • 443 (HTTPS)
                          • 53 (DNS)
                          TimestampSource PortDest PortSource IPDest IP
                          Mar 19, 2025 20:27:16.206737995 CET48202443192.168.2.13185.125.190.26
                          Mar 19, 2025 20:27:46.670712948 CET48202443192.168.2.13185.125.190.26
                          TimestampSource PortDest PortSource IPDest IP
                          Mar 19, 2025 20:27:08.893852949 CET3732253192.168.2.131.1.1.1
                          Mar 19, 2025 20:27:08.893852949 CET3728953192.168.2.131.1.1.1
                          Mar 19, 2025 20:27:08.990097046 CET53372891.1.1.1192.168.2.13
                          Mar 19, 2025 20:27:08.990124941 CET53373221.1.1.1192.168.2.13
                          TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
                          Mar 19, 2025 20:27:08.893852949 CET192.168.2.131.1.1.10x2d05Standard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
                          Mar 19, 2025 20:27:08.893852949 CET192.168.2.131.1.1.10xca0fStandard query (0)daisy.ubuntu.com28IN (0x0001)false
                          TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
                          Mar 19, 2025 20:27:08.990124941 CET1.1.1.1192.168.2.130x2d05No error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false
                          Mar 19, 2025 20:27:08.990124941 CET1.1.1.1192.168.2.130x2d05No error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false

                          System Behavior

                          Start time (UTC):19:27:06
                          Start date (UTC):19/03/2025
                          Path:/tmp/jkse.arm6.elf
                          Arguments:/tmp/jkse.arm6.elf
                          File size:4956856 bytes
                          MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1