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Linux Analysis Report
tftp.elf

Overview

General Information

Sample name:tftp.elf
Analysis ID:1674262
MD5:9a876c4d9ae87eb594f34de44748bbf5
SHA1:4f431923a97537bcb9cac89c376cc1e6139fe135
SHA256:640e2beaa0b744f57224e60fed10c57d6e1edbd89570ec5986c8d8824e38d7ea
Tags:elfuser-abuse_ch
Infos:

Detection

Score:48
Range:0 - 100

Signatures

Multi AV Scanner detection for submitted file
Executes the "rm" command used to delete files or directories
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:1674262
Start date and time:2025-04-25 18:03:12 +02:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 29s
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:tftp.elf
Detection:MAL
Classification:mal48.linELF@0/0@0/0
Command:/tmp/tftp.elf
PID:6245
Exit Code:135
Exit Code Info:
Killed:False
Standard Output:

Standard Error:
  • system is lnxubuntu20
  • dash New Fork (PID: 6227, Parent: 4331)
  • rm (PID: 6227, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.6QLktQDYnO /tmp/tmp.8vDilE4Yhe /tmp/tmp.APQO1ycBrx
  • dash New Fork (PID: 6228, Parent: 4331)
  • cat (PID: 6228, Parent: 4331, MD5: 7e9d213e404ad3bb82e4ebb2e1f2c1b3) Arguments: cat /tmp/tmp.6QLktQDYnO
  • dash New Fork (PID: 6229, Parent: 4331)
  • head (PID: 6229, Parent: 4331, MD5: fd96a67145172477dd57131396fc9608) Arguments: head -n 10
  • dash New Fork (PID: 6230, Parent: 4331)
  • tr (PID: 6230, Parent: 4331, MD5: fbd1402dd9f72d8ebfff00ce7c3a7bb5) Arguments: tr -d \\000-\\011\\013\\014\\016-\\037
  • dash New Fork (PID: 6231, Parent: 4331)
  • cut (PID: 6231, Parent: 4331, MD5: d8ed0ea8f22c0de0f8692d4d9f1759d3) Arguments: cut -c -80
  • dash New Fork (PID: 6232, Parent: 4331)
  • cat (PID: 6232, Parent: 4331, MD5: 7e9d213e404ad3bb82e4ebb2e1f2c1b3) Arguments: cat /tmp/tmp.6QLktQDYnO
  • dash New Fork (PID: 6233, Parent: 4331)
  • head (PID: 6233, Parent: 4331, MD5: fd96a67145172477dd57131396fc9608) Arguments: head -n 10
  • dash New Fork (PID: 6234, Parent: 4331)
  • tr (PID: 6234, Parent: 4331, MD5: fbd1402dd9f72d8ebfff00ce7c3a7bb5) Arguments: tr -d \\000-\\011\\013\\014\\016-\\037
  • dash New Fork (PID: 6235, Parent: 4331)
  • cut (PID: 6235, Parent: 4331, MD5: d8ed0ea8f22c0de0f8692d4d9f1759d3) Arguments: cut -c -80
  • dash New Fork (PID: 6236, Parent: 4331)
  • rm (PID: 6236, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.6QLktQDYnO /tmp/tmp.8vDilE4Yhe /tmp/tmp.APQO1ycBrx
  • tftp.elf (PID: 6245, Parent: 6158, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/tftp.elf
  • cleanup
No yara matches
No Suricata rule has matched

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Source: tftp.elfReversingLabs: Detection: 19%
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: classification engineClassification label: mal48.linELF@0/0@0/0
Source: /usr/bin/dash (PID: 6227)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.6QLktQDYnO /tmp/tmp.8vDilE4Yhe /tmp/tmp.APQO1ycBrxJump to behavior
Source: /usr/bin/dash (PID: 6236)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.6QLktQDYnO /tmp/tmp.8vDilE4Yhe /tmp/tmp.APQO1ycBrxJump to behavior
Source: /tmp/tftp.elf (PID: 6245)Queries kernel information via 'uname': Jump to behavior
Source: tftp.elf, 6245.1.000055e7aa0ed000.000055e7aa1f9000.rw-.sdmpBinary or memory string: U!/etc/qemu-binfmt/arm
Source: tftp.elf, 6245.1.00007ffe578bf000.00007ffe578e0000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/tftp.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/tftp.elf
Source: tftp.elf, 6245.1.000055e7aa0ed000.000055e7aa1f9000.rw-.sdmpBinary or memory string: Urg.qemu.gdb.arm.sys.regs">
Source: tftp.elf, 6245.1.000055e7aa0ed000.000055e7aa1f9000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: tftp.elf, 6245.1.00007ffe578bf000.00007ffe578e0000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: tftp.elf, 6245.1.000055e7aa0ed000.000055e7aa1f9000.rw-.sdmpBinary or memory string: rg.qemu.gdb.arm.sys.regs">
ReconnaissanceResource DevelopmentInitial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionCommand and ControlExfiltrationImpact
Gather Victim Identity InformationAcquire InfrastructureValid AccountsWindows Management InstrumentationPath InterceptionPath Interception1
File Deletion
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 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: 1674262 Sample: tftp.elf Startdate: 25/04/2025 Architecture: LINUX Score: 48 14 109.202.202.202, 80 INIT7CH Switzerland 2->14 16 91.189.91.42, 443 CANONICAL-ASGB United Kingdom 2->16 18 91.189.91.43, 443 CANONICAL-ASGB United Kingdom 2->18 20 Multi AV Scanner detection for submitted file 2->20 6 dash rm tftp.elf 2->6         started        8 dash rm 2->8         started        10 dash cut 2->10         started        12 7 other processes 2->12 signatures3 process4
SourceDetectionScannerLabelLink
tftp.elf19%ReversingLabsLinux.Trojan.Multiverze
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
        na.elfGet hashmaliciousPrometeiBrowse
          na.elfGet hashmaliciousPrometeiBrowse
            na.elfGet hashmaliciousPrometeiBrowse
              na.elfGet hashmaliciousPrometeiBrowse
                na.elfGet hashmaliciousPrometeiBrowse
                  SecuriteInfo.com.ELF.Mirai-CXB.17711.4087.elfGet hashmaliciousUnknownBrowse
                    na.elfGet hashmaliciousPrometeiBrowse
                      91.189.91.42na.elfGet hashmaliciousPrometeiBrowse
                        na.elfGet hashmaliciousPrometeiBrowse
                          na.elfGet hashmaliciousPrometeiBrowse
                            na.elfGet hashmaliciousPrometeiBrowse
                              na.elfGet hashmaliciousPrometeiBrowse
                                na.elfGet hashmaliciousPrometeiBrowse
                                  na.elfGet hashmaliciousPrometeiBrowse
                                    na.elfGet hashmaliciousPrometeiBrowse
                                      SecuriteInfo.com.ELF.Mirai-CXB.17711.4087.elfGet hashmaliciousUnknownBrowse
                                        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
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 185.125.190.26
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 185.125.190.26
                                          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
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 185.125.190.26
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 91.189.91.42
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 185.125.190.26
                                          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
                                          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
                                          SecuriteInfo.com.ELF.Mirai-CXB.17711.4087.elfGet hashmaliciousUnknownBrowse
                                          • 109.202.202.202
                                          na.elfGet hashmaliciousPrometeiBrowse
                                          • 109.202.202.202
                                          No context
                                          No context
                                          No created / dropped files found
                                          File type:ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.3, missing section headers at 381572
                                          Entropy (8bit):6.009615572465946
                                          TrID:
                                          • ELF Executable and Linkable format (generic) (4004/1) 100.00%
                                          File name:tftp.elf
                                          File size:102'400 bytes
                                          MD5:9a876c4d9ae87eb594f34de44748bbf5
                                          SHA1:4f431923a97537bcb9cac89c376cc1e6139fe135
                                          SHA256:640e2beaa0b744f57224e60fed10c57d6e1edbd89570ec5986c8d8824e38d7ea
                                          SHA512:2c741cc9176f9d4ccf9cabd2add2a7ae6a29f2bcab4437c34708ec96262e499d0b9854a28141ac4194bd5241bdc7ee148a5d33d89b5b9369990db2e485818f37
                                          SSDEEP:3072:9LOuh02xHCKQnqZ9YfMXKgyLlBZSyPjrm+:FOuhPHCKsqZ9YfM6g23ZJLrm+
                                          TLSH:FDA30A96F8A28B56C4C557B7FB4FC75637231795E3DF36038A184E34278B50A8E3AA01
                                          File Content Preview:.ELF..............(.........4...........4. ...(........p.....+...+......................4...4...4...@...@...............t...t...t..............................................................................................................................

                                          Download Network PCAP: filteredfull

                                          • Total Packets: 7
                                          • 443 (HTTPS)
                                          • 80 (HTTP)
                                          TimestampSource PortDest PortSource IPDest IP
                                          Apr 25, 2025 18:03:58.134597063 CEST43928443192.168.2.2391.189.91.42
                                          Apr 25, 2025 18:04:03.509710073 CEST42836443192.168.2.2391.189.91.43
                                          Apr 25, 2025 18:04:04.789541960 CEST4251680192.168.2.23109.202.202.202
                                          Apr 25, 2025 18:04:19.635481119 CEST43928443192.168.2.2391.189.91.42
                                          Apr 25, 2025 18:04:29.874085903 CEST42836443192.168.2.2391.189.91.43
                                          Apr 25, 2025 18:04:36.017256975 CEST4251680192.168.2.23109.202.202.202
                                          Apr 25, 2025 18:05:00.589853048 CEST43928443192.168.2.2391.189.91.42

                                          System Behavior

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/dash
                                          Arguments:-
                                          File size:129816 bytes
                                          MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/rm
                                          Arguments:rm -f /tmp/tmp.6QLktQDYnO /tmp/tmp.8vDilE4Yhe /tmp/tmp.APQO1ycBrx
                                          File size:72056 bytes
                                          MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/dash
                                          Arguments:-
                                          File size:129816 bytes
                                          MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/cat
                                          Arguments:cat /tmp/tmp.6QLktQDYnO
                                          File size:43416 bytes
                                          MD5 hash:7e9d213e404ad3bb82e4ebb2e1f2c1b3

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/dash
                                          Arguments:-
                                          File size:129816 bytes
                                          MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/head
                                          Arguments:head -n 10
                                          File size:47480 bytes
                                          MD5 hash:fd96a67145172477dd57131396fc9608

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/dash
                                          Arguments:-
                                          File size:129816 bytes
                                          MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/tr
                                          Arguments:tr -d \\000-\\011\\013\\014\\016-\\037
                                          File size:51544 bytes
                                          MD5 hash:fbd1402dd9f72d8ebfff00ce7c3a7bb5

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/dash
                                          Arguments:-
                                          File size:129816 bytes
                                          MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/cut
                                          Arguments:cut -c -80
                                          File size:47480 bytes
                                          MD5 hash:d8ed0ea8f22c0de0f8692d4d9f1759d3

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/dash
                                          Arguments:-
                                          File size:129816 bytes
                                          MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/cat
                                          Arguments:cat /tmp/tmp.6QLktQDYnO
                                          File size:43416 bytes
                                          MD5 hash:7e9d213e404ad3bb82e4ebb2e1f2c1b3

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/dash
                                          Arguments:-
                                          File size:129816 bytes
                                          MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/head
                                          Arguments:head -n 10
                                          File size:47480 bytes
                                          MD5 hash:fd96a67145172477dd57131396fc9608

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/dash
                                          Arguments:-
                                          File size:129816 bytes
                                          MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/tr
                                          Arguments:tr -d \\000-\\011\\013\\014\\016-\\037
                                          File size:51544 bytes
                                          MD5 hash:fbd1402dd9f72d8ebfff00ce7c3a7bb5

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/dash
                                          Arguments:-
                                          File size:129816 bytes
                                          MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/cut
                                          Arguments:cut -c -80
                                          File size:47480 bytes
                                          MD5 hash:d8ed0ea8f22c0de0f8692d4d9f1759d3

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/dash
                                          Arguments:-
                                          File size:129816 bytes
                                          MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                          Start time (UTC):16:03:50
                                          Start date (UTC):25/04/2025
                                          Path:/usr/bin/rm
                                          Arguments:rm -f /tmp/tmp.6QLktQDYnO /tmp/tmp.8vDilE4Yhe /tmp/tmp.APQO1ycBrx
                                          File size:72056 bytes
                                          MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                                          Start time (UTC):16:03:54
                                          Start date (UTC):25/04/2025
                                          Path:/tmp/tftp.elf
                                          Arguments:/tmp/tftp.elf
                                          File size:4956856 bytes
                                          MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1