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Linux Analysis Report
linux.elf

Overview

General Information

Sample name:linux.elf
Analysis ID:1669007
MD5:d092c4dffeea8b5614ab0583e5ac67e3
SHA1:d508af4e967b66835060c0e91f2752ffb096b2ac
SHA256:57fc6ff247041fbee66177a89fee1935ca0e2cd1987aac464e9c398923bf3551
Tags:elfuser-abuse_ch
Infos:

Detection

Score:1
Range:0 - 100

Signatures

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)

Classification

RansomwareSpreadingPhishingBankerTrojan / BotAdwareSpywareExploiterEvaderMinercleansuspiciousmalicious
Joe Sandbox version:42.0.0 Malachite
Analysis ID:1669007
Start date and time:2025-04-19 04:19:39 +02:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 27s
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:linux.elf
Detection:CLEAN
Classification:clean1.linELF@0/0@0/0
Command:/tmp/linux.elf
PID:6224
Exit Code:135
Exit Code Info:
Killed:False
Standard Output:

Standard Error:
  • system is lnxubuntu20
  • linux.elf (PID: 6224, Parent: 6140, MD5: d092c4dffeea8b5614ab0583e5ac67e3) Arguments: /tmp/linux.elf
  • cleanup
No yara matches
No Suricata rule has matched

Click to jump to signature section

Show All Signature Results

There are no malicious signatures, click here to show all signatures.

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: 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: 0x400000
Source: classification engineClassification label: clean1.linELF@0/0@0/0
Source: linux.elfSubmission file: segment LOAD with 7.627 entropy (max. 8.0)
Source: linux.elfSubmission file: segment LOAD with 7.9458 entropy (max. 8.0)
ReconnaissanceResource DevelopmentInitial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionCommand and ControlExfiltrationImpact
Gather Victim Identity InformationAcquire InfrastructureValid AccountsWindows Management InstrumentationPath InterceptionPath Interception1
Obfuscated Files or Information
OS Credential DumpingSystem Service DiscoveryRemote 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: 1669007 Sample: linux.elf Startdate: 19/04/2025 Architecture: LINUX Score: 1 7 109.202.202.202, 80 INIT7CH Switzerland 2->7 9 91.189.91.42, 443 CANONICAL-ASGB United Kingdom 2->9 11 91.189.91.43, 443 CANONICAL-ASGB United Kingdom 2->11 5 linux.elf 2->5         started        process3
No Antivirus matches
No Antivirus matches
No Antivirus matches
No Antivirus matches

Download Network PCAP: filteredfull

No contacted domains info
  • 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
91.189.91.43na.elfGet hashmaliciousPrometeiBrowse
    na.elfGet hashmaliciousPrometeiBrowse
      na.elfGet hashmaliciousPrometeiBrowse
        tftp.elfGet hashmaliciousUnknownBrowse
          na.elfGet hashmaliciousPrometeiBrowse
            na.elfGet hashmaliciousPrometeiBrowse
              na.elfGet hashmaliciousPrometeiBrowse
                na.elfGet hashmaliciousPrometeiBrowse
                  na.elfGet hashmaliciousPrometeiBrowse
                    na.elfGet hashmaliciousPrometeiBrowse
                      91.189.91.42na.elfGet hashmaliciousPrometeiBrowse
                        na.elfGet hashmaliciousPrometeiBrowse
                          na.elfGet hashmaliciousPrometeiBrowse
                            tftp.elfGet hashmaliciousUnknownBrowse
                              na.elfGet hashmaliciousPrometeiBrowse
                                na.elfGet hashmaliciousPrometeiBrowse
                                  na.elfGet hashmaliciousPrometeiBrowse
                                    na.elfGet hashmaliciousPrometeiBrowse
                                      na.elfGet hashmaliciousPrometeiBrowse
                                        na.elfGet hashmaliciousPrometeiBrowse
                                          No context
                                          MatchAssociated Sample Name / URLSHA 256DetectionThreat NameLinkContext
                                          CANONICAL-ASGBna.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          tftp.elfGet hashmaliciousUnknownBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          CANONICAL-ASGBna.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          tftp.elfGet hashmaliciousUnknownBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          INIT7CHna.elfGet hashmaliciousPrometeiBrowse
                                          • 109.202.202.202
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 109.202.202.202
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 109.202.202.202
                                          tftp.elfGet hashmaliciousUnknownBrowse
                                          • 109.202.202.202
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 109.202.202.202
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 109.202.202.202
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 109.202.202.202
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 109.202.202.202
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 109.202.202.202
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 109.202.202.202
                                          No context
                                          No context
                                          No created / dropped files found
                                          File type:ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, no section header
                                          Entropy (8bit):7.945786056576137
                                          TrID:
                                          • ELF Executable and Linkable format (Linux) (4029/14) 50.16%
                                          • ELF Executable and Linkable format (generic) (4004/1) 49.84%
                                          File name:linux.elf
                                          File size:1'701'400 bytes
                                          MD5:d092c4dffeea8b5614ab0583e5ac67e3
                                          SHA1:d508af4e967b66835060c0e91f2752ffb096b2ac
                                          SHA256:57fc6ff247041fbee66177a89fee1935ca0e2cd1987aac464e9c398923bf3551
                                          SHA512:e9054c90aef738741aee90ada8d2f21101fb5e29eeb57030254389287883b7e3b91fcde458f81d99bbb275a6c307be2161946fb99f1d600f9609aae4efa3b20b
                                          SSDEEP:49152:gSTThuIhuiywLRV7G6w8HMl7X0oTP0XX7zgm4GIy:ZJzuMLz7G6u0oTPULE+t
                                          TLSH:F67533585FA499C139E78D77372786DF2268F916F1BD7DA3CE3C1DBA206CC422806618
                                          File Content Preview:.ELF..............>.....x.......@...................@.8...........................@.......@...............|.............................................>V$.....>V$.............Q.td....................................................#...UPX!..........W..4T

                                          ELF header

                                          Class:ELF64
                                          Data:2's complement, little endian
                                          Version:1 (current)
                                          Machine:Advanced Micro Devices X86-64
                                          Version Number:0x1
                                          Type:EXEC (Executable file)
                                          OS/ABI:UNIX - System V
                                          ABI Version:0
                                          Entry Point Address:0xe0db78
                                          Flags:0x0
                                          ELF Header Size:64
                                          Program Header Offset:64
                                          Program Header Size:56
                                          Number of Program Headers:3
                                          Section Header Offset:0
                                          Section Header Size:0
                                          Number of Section Headers:0
                                          Header String Table Index:0
                                          TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
                                          LOAD0x00x4000000x4000000x10000x7c87b07.62700x6RW 0x1000
                                          LOAD0x00xbc90000xbc90000x24563e0x24563e7.94580x5R E0x1000
                                          GNU_STACK0x00x00x00x00x00.00000x6RW 0x10

                                          Download Network PCAP: filteredfull

                                          • Total Packets: 7
                                          • 443 (HTTPS)
                                          • 80 (HTTP)
                                          TimestampSource PortDest PortSource IPDest IP
                                          Apr 19, 2025 04:20:23.134574890 CEST43928443192.168.2.2391.189.91.42
                                          Apr 19, 2025 04:20:28.765844107 CEST42836443192.168.2.2391.189.91.43
                                          Apr 19, 2025 04:20:30.045792103 CEST4251680192.168.2.23109.202.202.202
                                          Apr 19, 2025 04:20:43.355933905 CEST43928443192.168.2.2391.189.91.42
                                          Apr 19, 2025 04:20:55.642138004 CEST42836443192.168.2.2391.189.91.43
                                          Apr 19, 2025 04:20:59.737560987 CEST4251680192.168.2.23109.202.202.202
                                          Apr 19, 2025 04:21:24.310141087 CEST43928443192.168.2.2391.189.91.42

                                          System Behavior

                                          Start time (UTC):02:20:22
                                          Start date (UTC):19/04/2025
                                          Path:/tmp/linux.elf
                                          Arguments:/tmp/linux.elf
                                          File size:1701400 bytes
                                          MD5 hash:d092c4dffeea8b5614ab0583e5ac67e3