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Linux Analysis Report
tftp.elf

Overview

General Information

Sample name:tftp.elf
Analysis ID:1629568
MD5:c5fb30f47117944dbd14bd86e51ba504
SHA1:89c6a1de4a09ce1b8ddcdbc1978e3c19586a0c8b
SHA256:78410d92efab1e5b4d23aa58744103313546171196bb98663e6c05f32074a75a
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
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

RansomwareSpreadingPhishingBankerTrojan / BotAdwareSpywareExploiterEvaderMinercleansuspiciousmalicious
Joe Sandbox version:42.0.0 Malachite
Analysis ID:1629568
Start date and time:2025-03-04 21:42:24 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 30s
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@2/0
Command:/tmp/tftp.elf
PID:5504
Exit Code:135
Exit Code Info:
Killed:False
Standard Output:

Standard Error:
  • system is lnxubuntu20
  • tftp.elf (PID: 5504, Parent: 5429, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/tftp.elf
  • dash New Fork (PID: 5545, Parent: 3656)
  • rm (PID: 5545, Parent: 3656, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.c3el1MfV0d /tmp/tmp.AcYqKBjCpG /tmp/tmp.reOhvtc8re
  • dash New Fork (PID: 5546, Parent: 3656)
  • cat (PID: 5546, Parent: 3656, MD5: 7e9d213e404ad3bb82e4ebb2e1f2c1b3) Arguments: cat /tmp/tmp.c3el1MfV0d
  • dash New Fork (PID: 5547, Parent: 3656)
  • head (PID: 5547, Parent: 3656, MD5: fd96a67145172477dd57131396fc9608) Arguments: head -n 10
  • dash New Fork (PID: 5548, Parent: 3656)
  • tr (PID: 5548, Parent: 3656, MD5: fbd1402dd9f72d8ebfff00ce7c3a7bb5) Arguments: tr -d \\000-\\011\\013\\014\\016-\\037
  • dash New Fork (PID: 5549, Parent: 3656)
  • cut (PID: 5549, Parent: 3656, MD5: d8ed0ea8f22c0de0f8692d4d9f1759d3) Arguments: cut -c -80
  • dash New Fork (PID: 5550, Parent: 3656)
  • cat (PID: 5550, Parent: 3656, MD5: 7e9d213e404ad3bb82e4ebb2e1f2c1b3) Arguments: cat /tmp/tmp.c3el1MfV0d
  • dash New Fork (PID: 5551, Parent: 3656)
  • head (PID: 5551, Parent: 3656, MD5: fd96a67145172477dd57131396fc9608) Arguments: head -n 10
  • dash New Fork (PID: 5552, Parent: 3656)
  • tr (PID: 5552, Parent: 3656, MD5: fbd1402dd9f72d8ebfff00ce7c3a7bb5) Arguments: tr -d \\000-\\011\\013\\014\\016-\\037
  • dash New Fork (PID: 5553, Parent: 3656)
  • cut (PID: 5553, Parent: 3656, MD5: d8ed0ea8f22c0de0f8692d4d9f1759d3) Arguments: cut -c -80
  • dash New Fork (PID: 5554, Parent: 3656)
  • rm (PID: 5554, Parent: 3656, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.c3el1MfV0d /tmp/tmp.AcYqKBjCpG /tmp/tmp.reOhvtc8re
  • 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: 18%
Source: unknownHTTPS traffic detected: 54.217.10.153:443 -> 192.168.2.14:34596 version: TLS 1.2
Source: global trafficDNS traffic detected: DNS query: daisy.ubuntu.com
Source: unknownNetwork traffic detected: HTTP traffic on port 34596 -> 443
Source: unknownNetwork traffic detected: HTTP traffic on port 443 -> 34596
Source: unknownHTTPS traffic detected: 54.217.10.153:443 -> 192.168.2.14:34596 version: TLS 1.2
Source: classification engineClassification label: mal48.linELF@0/0@2/0
Source: /usr/bin/dash (PID: 5545)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.c3el1MfV0d /tmp/tmp.AcYqKBjCpG /tmp/tmp.reOhvtc8reJump to behavior
Source: /usr/bin/dash (PID: 5554)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.c3el1MfV0d /tmp/tmp.AcYqKBjCpG /tmp/tmp.reOhvtc8reJump to behavior
Source: /tmp/tftp.elf (PID: 5504)Queries kernel information via 'uname': Jump to behavior
Source: tftp.elf, 5504.1.000055bec7e07000.000055bec7f13000.rw-.sdmpBinary or memory string: U!/etc/qemu-binfmt/arm
Source: tftp.elf, 5504.1.00007ffd9de09000.00007ffd9de2a000.rw-.sdmpBinary or memory string: cx86_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, 5504.1.000055bec7e07000.000055bec7f13000.rw-.sdmpBinary or memory string: Urg.qemu.gdb.arm.sys.regs">
Source: tftp.elf, 5504.1.000055bec7e07000.000055bec7f13000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: tftp.elf, 5504.1.00007ffd9de09000.00007ffd9de2a000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: tftp.elf, 5504.1.000055bec7e07000.000055bec7f13000.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
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: 1629568 Sample: tftp.elf Startdate: 04/03/2025 Architecture: LINUX Score: 48 14 54.217.10.153, 34596, 443 AMAZON-02US United States 2->14 16 daisy.ubuntu.com 2->16 18 Multi AV Scanner detection for submitted file 2->18 6 dash rm 2->6         started        8 dash head 2->8         started        10 dash tr 2->10         started        12 8 other processes 2->12 signatures3 process4

This section contains all screenshots as thumbnails, including those not shown in the slideshow.


windows-stand
SourceDetectionScannerLabelLink
tftp.elf18%ReversingLabsLinux.Trojan.Multiverze
No Antivirus matches
No Antivirus matches
No Antivirus matches

Download Network PCAP: filteredfull

NameIPActiveMaliciousAntivirus DetectionReputation
daisy.ubuntu.com
162.213.35.24
truefalse
    high
    • No. of IPs < 25%
    • 25% < No. of IPs < 50%
    • 50% < No. of IPs < 75%
    • 75% < No. of IPs
    IPDomainCountryFlagASNASN NameMalicious
    54.217.10.153
    unknownUnited States
    16509AMAZON-02USfalse
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                        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):6.009541300275253
                        TrID:
                        • ELF Executable and Linkable format (generic) (4004/1) 100.00%
                        File name:tftp.elf
                        File size:102'400 bytes
                        MD5:c5fb30f47117944dbd14bd86e51ba504
                        SHA1:89c6a1de4a09ce1b8ddcdbc1978e3c19586a0c8b
                        SHA256:78410d92efab1e5b4d23aa58744103313546171196bb98663e6c05f32074a75a
                        SHA512:0dc1663366ebfdef55bb0f34ec7a28a2bd34544bc516ec490783d8bedb5510b8f89a53a17571136b1e7a6e35a8b717bfabb75f67bb0896ad1e097915a15e39a7
                        SSDEEP:3072:9LOuh02xHCKQnqZ9YfMXKgyLlBZSyPjYDC:FOuhPHCKsqZ9YfM6g23ZJLYDC
                        TLSH:FBA30A96F8A28B56C4C557B7FB4FC75637231795E3DF36038A184E34278B50A8E3AA01
                        File Content Preview:.ELF..............(.........4...........4. ...(........p.....+...+......................4...4...4...@...@...............t...t...t..............................................................................................................................

                        Download Network PCAP: filteredfull

                        • Total Packets: 12
                        • 443 (HTTPS)
                        • 53 (DNS)
                        TimestampSource PortDest PortSource IPDest IP
                        Mar 4, 2025 21:43:16.119309902 CET4433459654.217.10.153192.168.2.14
                        Mar 4, 2025 21:43:16.119322062 CET4433459654.217.10.153192.168.2.14
                        Mar 4, 2025 21:43:16.119332075 CET4433459654.217.10.153192.168.2.14
                        Mar 4, 2025 21:43:16.119343042 CET4433459654.217.10.153192.168.2.14
                        Mar 4, 2025 21:43:16.119548082 CET34596443192.168.2.1454.217.10.153
                        Mar 4, 2025 21:43:16.119549036 CET34596443192.168.2.1454.217.10.153
                        Mar 4, 2025 21:43:16.119549036 CET34596443192.168.2.1454.217.10.153
                        Mar 4, 2025 21:43:16.119549036 CET34596443192.168.2.1454.217.10.153
                        Mar 4, 2025 21:43:16.120250940 CET34596443192.168.2.1454.217.10.153
                        Mar 4, 2025 21:43:16.125260115 CET4433459654.217.10.153192.168.2.14
                        Mar 4, 2025 21:43:16.400243998 CET4433459654.217.10.153192.168.2.14
                        Mar 4, 2025 21:43:16.400414944 CET34596443192.168.2.1454.217.10.153
                        Mar 4, 2025 21:43:16.400568962 CET34596443192.168.2.1454.217.10.153
                        Mar 4, 2025 21:43:16.405527115 CET4433459654.217.10.153192.168.2.14
                        Mar 4, 2025 21:43:16.839623928 CET4433459654.217.10.153192.168.2.14
                        Mar 4, 2025 21:43:16.839751005 CET34596443192.168.2.1454.217.10.153
                        Mar 4, 2025 21:43:16.840557098 CET34596443192.168.2.1454.217.10.153
                        Mar 4, 2025 21:43:16.845799923 CET4433459654.217.10.153192.168.2.14
                        Mar 4, 2025 21:43:16.845833063 CET34596443192.168.2.1454.217.10.153
                        TimestampSource PortDest PortSource IPDest IP
                        Mar 4, 2025 21:43:12.810770035 CET5370153192.168.2.148.8.8.8
                        Mar 4, 2025 21:43:12.810770035 CET4102453192.168.2.148.8.8.8
                        Mar 4, 2025 21:43:12.818844080 CET53410248.8.8.8192.168.2.14
                        Mar 4, 2025 21:43:12.818964005 CET53537018.8.8.8192.168.2.14
                        TimestampSource IPDest IPTrans IDOP CodeNameTypeClassDNS over HTTPS
                        Mar 4, 2025 21:43:12.810770035 CET192.168.2.148.8.8.80x1852Standard query (0)daisy.ubuntu.comA (IP address)IN (0x0001)false
                        Mar 4, 2025 21:43:12.810770035 CET192.168.2.148.8.8.80xf31aStandard query (0)daisy.ubuntu.com28IN (0x0001)false
                        TimestampSource IPDest IPTrans IDReply CodeNameCNameAddressTypeClassDNS over HTTPS
                        Mar 4, 2025 21:43:12.818964005 CET8.8.8.8192.168.2.140x1852No error (0)daisy.ubuntu.com162.213.35.24A (IP address)IN (0x0001)false
                        Mar 4, 2025 21:43:12.818964005 CET8.8.8.8192.168.2.140x1852No error (0)daisy.ubuntu.com162.213.35.25A (IP address)IN (0x0001)false
                        TimestampSource IPSource PortDest IPDest PortSubjectIssuerNot BeforeNot AfterJA3 SSL Client FingerprintJA3 SSL Client Digest
                        Mar 4, 2025 21:43:16.119332075 CET54.217.10.153443192.168.2.1434596CN=motd.ubuntu.com CN=R11, O=Let's Encrypt, C=USCN=R11, O=Let's Encrypt, C=US CN=ISRG Root X1, O=Internet Security Research Group, C=USSun Jan 05 09:21:36 CET 2025 Wed Mar 13 01:00:00 CET 2024Sat Apr 05 10:21:35 CEST 2025 Sat Mar 13 00:59:59 CET 2027
                        CN=R11, O=Let's Encrypt, C=USCN=ISRG Root X1, O=Internet Security Research Group, C=USWed Mar 13 01:00:00 CET 2024Sat Mar 13 00:59:59 CET 2027

                        System Behavior

                        Start time (UTC):20:43:10
                        Start date (UTC):04/03/2025
                        Path:/tmp/tftp.elf
                        Arguments:/tmp/tftp.elf
                        File size:4956856 bytes
                        MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/dash
                        Arguments:-
                        File size:129816 bytes
                        MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/rm
                        Arguments:rm -f /tmp/tmp.c3el1MfV0d /tmp/tmp.AcYqKBjCpG /tmp/tmp.reOhvtc8re
                        File size:72056 bytes
                        MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/dash
                        Arguments:-
                        File size:129816 bytes
                        MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/cat
                        Arguments:cat /tmp/tmp.c3el1MfV0d
                        File size:43416 bytes
                        MD5 hash:7e9d213e404ad3bb82e4ebb2e1f2c1b3

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/dash
                        Arguments:-
                        File size:129816 bytes
                        MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/head
                        Arguments:head -n 10
                        File size:47480 bytes
                        MD5 hash:fd96a67145172477dd57131396fc9608

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/dash
                        Arguments:-
                        File size:129816 bytes
                        MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/tr
                        Arguments:tr -d \\000-\\011\\013\\014\\016-\\037
                        File size:51544 bytes
                        MD5 hash:fbd1402dd9f72d8ebfff00ce7c3a7bb5

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/dash
                        Arguments:-
                        File size:129816 bytes
                        MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/cut
                        Arguments:cut -c -80
                        File size:47480 bytes
                        MD5 hash:d8ed0ea8f22c0de0f8692d4d9f1759d3

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/dash
                        Arguments:-
                        File size:129816 bytes
                        MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/cat
                        Arguments:cat /tmp/tmp.c3el1MfV0d
                        File size:43416 bytes
                        MD5 hash:7e9d213e404ad3bb82e4ebb2e1f2c1b3

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/dash
                        Arguments:-
                        File size:129816 bytes
                        MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/head
                        Arguments:head -n 10
                        File size:47480 bytes
                        MD5 hash:fd96a67145172477dd57131396fc9608

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/dash
                        Arguments:-
                        File size:129816 bytes
                        MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/tr
                        Arguments:tr -d \\000-\\011\\013\\014\\016-\\037
                        File size:51544 bytes
                        MD5 hash:fbd1402dd9f72d8ebfff00ce7c3a7bb5

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/dash
                        Arguments:-
                        File size:129816 bytes
                        MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/cut
                        Arguments:cut -c -80
                        File size:47480 bytes
                        MD5 hash:d8ed0ea8f22c0de0f8692d4d9f1759d3

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/dash
                        Arguments:-
                        File size:129816 bytes
                        MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                        Start time (UTC):20:43:15
                        Start date (UTC):04/03/2025
                        Path:/usr/bin/rm
                        Arguments:rm -f /tmp/tmp.c3el1MfV0d /tmp/tmp.AcYqKBjCpG /tmp/tmp.reOhvtc8re
                        File size:72056 bytes
                        MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b