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Linux Analysis Report
tftp.elf

Overview

General Information

Sample name:	tftp.elf
Analysis ID:	1670817
MD5:	4684a6c9b95e21018e4cfebff4db91ac
SHA1:	87c3bf9ad4acd5a8ff77b0fa09d64240fcd7dc0f
SHA256:	be4f35ebba6a985a8267579f31d6cb864730e2e4e04dcac500cc49e9016314a7
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	1
Range:	0 - 100

Signatures

Executes the "rm" command used to delete files or directories

Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable

Uses the "uname" system call to query kernel version information (possible evasion)

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1670817
Start date and time:	2025-04-22 08:34:14 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 24s
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:	CLEAN
Classification:	clean1.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/tftp.elf
PID:	5424
Exit Code:	135
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

tftp.elf (PID: 5424, Parent: 5348, MD5: 0083f1f0e77be34ad27f849842bbb00c) Arguments: /tmp/tftp.elf

dash New Fork (PID: 5492, Parent: 3578)

rm (PID: 5492, Parent: 3578, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.Hxy7NPNj2k /tmp/tmp.EU0zsj7Gwh /tmp/tmp.fi4F4SaQjR

dash New Fork (PID: 5493, Parent: 3578)

cat (PID: 5493, Parent: 3578, MD5: 7e9d213e404ad3bb82e4ebb2e1f2c1b3) Arguments: cat /tmp/tmp.Hxy7NPNj2k

dash New Fork (PID: 5494, Parent: 3578)

head (PID: 5494, Parent: 3578, MD5: fd96a67145172477dd57131396fc9608) Arguments: head -n 10

dash New Fork (PID: 5495, Parent: 3578)

tr (PID: 5495, Parent: 3578, MD5: fbd1402dd9f72d8ebfff00ce7c3a7bb5) Arguments: tr -d \\000-\\011\\013\\014\\016-\\037

dash New Fork (PID: 5496, Parent: 3578)

cut (PID: 5496, Parent: 3578, MD5: d8ed0ea8f22c0de0f8692d4d9f1759d3) Arguments: cut -c -80

dash New Fork (PID: 5497, Parent: 3578)

cat (PID: 5497, Parent: 3578, MD5: 7e9d213e404ad3bb82e4ebb2e1f2c1b3) Arguments: cat /tmp/tmp.Hxy7NPNj2k

dash New Fork (PID: 5498, Parent: 3578)

head (PID: 5498, Parent: 3578, MD5: fd96a67145172477dd57131396fc9608) Arguments: head -n 10

dash New Fork (PID: 5499, Parent: 3578)

tr (PID: 5499, Parent: 3578, MD5: fbd1402dd9f72d8ebfff00ce7c3a7bb5) Arguments: tr -d \\000-\\011\\013\\014\\016-\\037

dash New Fork (PID: 5500, Parent: 3578)

cut (PID: 5500, Parent: 3578, MD5: d8ed0ea8f22c0de0f8692d4d9f1759d3) Arguments: cut -c -80

dash New Fork (PID: 5501, Parent: 3578)

rm (PID: 5501, Parent: 3578, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.Hxy7NPNj2k /tmp/tmp.EU0zsj7Gwh /tmp/tmp.fi4F4SaQjR

cleanup

HTTP traffic detected: GET / HTTP/1.1User-Agent: wget/1.20.3-1ubuntu1 Ubuntu/20.04.2/LTS GNU/Linux/5.4.0-72-generic/x86_64 Intel(R)/Xeon(R)/Silver/4210/CPU/@/2.20GHz cloud_id/noneAccept: */*Accept-Encoding: identityHost: motd.ubuntu.comConnection: Keep-Alive

Source: global traffic

DNS traffic detected: DNS query: daisy.ubuntu.com

Source: unknown	Network traffic detected: HTTP traffic on port 57224 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 58866 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 57224

Source: Initial sample	String containing 'busybox' found: busybox_main
Source: Initial sample	String containing 'busybox' found: _fini__uClibc_mainbb_applet_namerun_applet_by_namebb_error_msg_and_diebeen_there_done_thatstderrbb_msg_full_versionappletsfputsbb_strlenmemmovememsetusage_messagesstrcmpbsearchfind_applet_by_namebb_show_usagebusybox_maintest_maincat_mainchmod_mainchown_mainclear_maincp_maindate_maindf_maindu_mainecho_mainenv_mainfalse_mainhalt_mainhostname_mainifconfig_maininit_maininsmod_mainkill_mainln_mainls_mainlsmod_mainmesg_mainmkdir_mainmknod_mainmodprobe_mainmore_mainmsh_mainmv_mainnetstat_mainnslookup_mainping_mainpoweroff_mainps_mainpwd_mainreboot_mainreset_mainrm_mainrmdir_mainrmmod_mainstart_stop_daemon_mainstty_maintail_maintelnet_maintftp_maintop_maintouch_maintrue_mainumount_mainuname_mainuptime_mainwhoami_mainbb_getopt_ulflagsoptindbb_wfopen_inputfilenobb_copyfd_eofbb_fclose_nonstdinbb_parse_modechmodbb_perror_msgrecursive_actionlchownstrchrget_ug_idmy_getgrnammy_getpwnamlstatcp_mv_stat2cp_mv_statbb_get_last_path_componentconcat_path_filecopy_filefreebb_opt_complementalyputenvbb_perror_msg_and_dielocaltimememc

Source: classification engine

Classification label: clean1.linELF@0/0@2/0

Source: /usr/bin/dash (PID: 5492)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.Hxy7NPNj2k /tmp/tmp.EU0zsj7Gwh /tmp/tmp.fi4F4SaQjR			Jump to behavior
Source: /usr/bin/dash (PID: 5501)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.Hxy7NPNj2k /tmp/tmp.EU0zsj7Gwh /tmp/tmp.fi4F4SaQjR			Jump to behavior

Source: /tmp/tftp.elf (PID: 5424)

Queries kernel information via 'uname':

Jump to behavior

Source: tftp.elf, 5424.1.0000565499274000.00005654992d8000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/mips
Source: tftp.elf, 5424.1.0000565499274000.00005654992d8000.rw-.sdmp	Binary or memory string: TV!/etc/qemu-binfmt/mips
Source: tftp.elf, 5424.1.00007ffd6f46c000.00007ffd6f48d000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-mips
Source: tftp.elf, 5424.1.00007ffd6f46c000.00007ffd6f48d000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-mips/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

Mitre Att&ck Matrix

Reconnaissance	Resource Development	Initial Access	Execution	Persistence	Privilege Escalation	Defense Evasion	Credential Access	Discovery	Lateral Movement	Collection	Command and Control	Exfiltration	Impact
Gather Victim Identity Information	Acquire Infrastructure	Valid Accounts	Windows Management Instrumentation	Path Interception	Path Interception	1 File Deletion	OS Credential Dumping	11 Security Software Discovery	Remote Services	Data from Local System	1 Encrypted Channel	Exfiltration Over Other Network Medium	Abuse Accessibility Features
Credentials	Domains	Default Accounts	Scheduled Task/Job	Boot or Logon Initialization Scripts	Boot or Logon Initialization Scripts	Rootkit	LSASS Memory	Application Window Discovery	Remote Desktop Protocol	Data from Removable Media	2 Non-Application Layer Protocol	Exfiltration Over Bluetooth	Network Denial of Service
Email Addresses	DNS Server	Domain Accounts	At	Logon Script (Windows)	Logon Script (Windows)	Obfuscated Files or Information	Security Account Manager	Query Registry	SMB/Windows Admin Shares	Data from Network Shared Drive	3 Application Layer Protocol	Automated Exfiltration	Data Encrypted for Impact
Employee Names	Virtual Private Server	Local Accounts	Cron	Login Hook	Login Hook	Binary Padding	NTDS	System Network Configuration Discovery	Distributed Component Object Model	Input Capture	1 Ingress Tool Transfer	Traffic Duplication	Data Destruction

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

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
tftp.elf	0%	ReversingLabs

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Download Network PCAP: filtered – full

Contacted Domains

Name	IP	Active	Malicious	Antivirus Detection	Reputation
daisy.ubuntu.com	162.213.35.24	true	false		high

Contacted URLs

Name	Malicious	Antivirus Detection	Reputation
https://motd.ubuntu.com/	false		high

World Map of Contacted IPs

No. of IPs < 25%
25% < No. of IPs < 50%
50% < No. of IPs < 75%
75% < No. of IPs

Public IPs

IP	Domain	Country	Flag	ASN	ASN Name	Malicious
54.171.230.55	unknown	United States		16509	AMAZON-02US	false
54.247.62.1	unknown	United States		16509	AMAZON-02US	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link
54.171.230.55	sora.m68k.elf	Get hash	malicious	Mirai	Browse
	boatnet.mpsl.elf	Get hash	malicious	Mirai	Browse
	boatnet.spc.elf	Get hash	malicious	Mirai	Browse
	boatnet.arc.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	bin.sh.elf	Get hash	malicious	Unknown	Browse
	2t54wQPHGM.elf	Get hash	malicious	Unknown	Browse
	whYxTcV4Sd.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
54.247.62.1	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	bin.sh.elf	Get hash	malicious	Unknown	Browse
	skid.mips.elf	Get hash	malicious	Unknown	Browse
	i-5.8-6.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	Aqua.m68k.elf	Get hash	malicious	Unknown	Browse
	1qciiq.arm6.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	vision.arm6.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	sora.sh4.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	sora.i686.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	sora.arm6.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	sora.x86_64.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	sora.spc.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	boatnet.arm5.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	sora.mips.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	boatnet.arm.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	boatnet.arm7.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	boatnet.mips.elf	Get hash	malicious	Mirai	Browse	162.213.35.25

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
AMAZON-02US	sora.arm.elf	Get hash	malicious	Mirai	Browse	34.249.145.219
	sora.m68k.elf	Get hash	malicious	Mirai	Browse	54.171.230.55
	sora.mips.elf	Get hash	malicious	Mirai	Browse	46.137.14.228
	https://eu-central-1.protection.sophos.com/?d=brandengineviolationcomplaint.vercel.app&u=aHR0cHM6Ly9icmFuZGVuZ2luZXZpb2xhdGlvbmNvbXBsYWludC52ZXJjZWwuYXBwL2RlY2lzaW9uJmNvcHlyaWdodA==&i=NjUxZWQxMDA4N2FjMWQxNThkZDkzYzBk&t=UXVWNXhKRDRMNHczWVQxbXRCUVY5ek1ZS2pPNTRxb1FYUm9qM1o5MkYzOD0=&h=26ccc16f7b314ca7af0d14dcbe1a8539&s=AVNPUEhUT0NFTkNSWVBUSVZUaY3LknUtlR58a7YV0y3FSjyq75Dcl3y2M62Z1i9YlndOhxpxIu_EXMNwEzI7Ffnw3WqcVEidN-wpYr4Ly1-YJ8YX7HhrMaOditPfeoG6yg	Get hash	malicious	HTMLPhisher	Browse	3.168.132.21
	Ref. No. 0360304 I.exe	Get hash	malicious	FormBook	Browse	13.248.169.48
	Quarantined Messages.zip	Get hash	malicious	HTMLPhisher	Browse	216.137.39.37
	boatnet.arm6.elf	Get hash	malicious	Mirai	Browse	34.249.145.219
	boatnet.mpsl.elf	Get hash	malicious	Mirai	Browse	54.171.230.55
	boatnet.spc.elf	Get hash	malicious	Mirai	Browse	34.249.145.219
	boatnet.arc.elf	Get hash	malicious	Mirai	Browse	54.171.230.55
AMAZON-02US	sora.arm.elf	Get hash	malicious	Mirai	Browse	34.249.145.219
	sora.m68k.elf	Get hash	malicious	Mirai	Browse	54.171.230.55
	sora.mips.elf	Get hash	malicious	Mirai	Browse	46.137.14.228
	https://eu-central-1.protection.sophos.com/?d=brandengineviolationcomplaint.vercel.app&u=aHR0cHM6Ly9icmFuZGVuZ2luZXZpb2xhdGlvbmNvbXBsYWludC52ZXJjZWwuYXBwL2RlY2lzaW9uJmNvcHlyaWdodA==&i=NjUxZWQxMDA4N2FjMWQxNThkZDkzYzBk&t=UXVWNXhKRDRMNHczWVQxbXRCUVY5ek1ZS2pPNTRxb1FYUm9qM1o5MkYzOD0=&h=26ccc16f7b314ca7af0d14dcbe1a8539&s=AVNPUEhUT0NFTkNSWVBUSVZUaY3LknUtlR58a7YV0y3FSjyq75Dcl3y2M62Z1i9YlndOhxpxIu_EXMNwEzI7Ffnw3WqcVEidN-wpYr4Ly1-YJ8YX7HhrMaOditPfeoG6yg	Get hash	malicious	HTMLPhisher	Browse	3.168.132.21
	Ref. No. 0360304 I.exe	Get hash	malicious	FormBook	Browse	13.248.169.48
	Quarantined Messages.zip	Get hash	malicious	HTMLPhisher	Browse	216.137.39.37
	boatnet.arm6.elf	Get hash	malicious	Mirai	Browse	34.249.145.219
	boatnet.mpsl.elf	Get hash	malicious	Mirai	Browse	54.171.230.55
	boatnet.spc.elf	Get hash	malicious	Mirai	Browse	34.249.145.219
	boatnet.arc.elf	Get hash	malicious	Mirai	Browse	54.171.230.55

JA3 Fingerprints

⊘No context

Dropped Files

⊘No context

Created / dropped Files

⊘No created / dropped files found

Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	TCP traffic detected without corresponding DNS query: 54.247.62.1
Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1

File type:	ELF 32-bit MSB executable, MIPS, MIPS32 version 1 (SYSV), dynamically linked, interpreter /lib/ld-uClibc.so.0, missing section headers at 243968
Entropy (8bit):	5.355328752623158
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	tftp.elf
File size:	102'400 bytes
MD5:	4684a6c9b95e21018e4cfebff4db91ac
SHA1:	87c3bf9ad4acd5a8ff77b0fa09d64240fcd7dc0f
SHA256:	be4f35ebba6a985a8267579f31d6cb864730e2e4e04dcac500cc49e9016314a7
SHA512:	d7aee38fa1e7018e600283497e6e746241b508c9dede15ceeaa58f733861ae85639039f083e5e25e963f0da08c20dc950395ca823d9fa259bbbeda73d28cdb03
SSDEEP:	1536:fmdurU07J8MtqHxqGPkncW/RVi/wJz8H6xVRFOr4kp6Qh2d:fma7JLqHxcncWZViTH6xVRFOR6Qh+
TLSH:	F4A3825E7A218F7DF6B8C73497FB1B34A77922CA2A91C580D1ACD5012E2434D981FF68
File Content Preview:	.ELF.....................@7....4....P....4. ...(...........4.@.4.@.4.........................@...@..................p......(.@.(.@.(.........................@...@....a...a...............a..Da..Da.......N0...............@.@.@.@.@...........................

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Apr 22, 2025 08:34:57.895121098 CEST	58866	443	192.168.2.13	54.171.230.55
Apr 22, 2025 08:35:26.332598925 CEST	57224	443	192.168.2.13	54.247.62.1
Apr 22, 2025 08:35:26.332643032 CEST	443	57224	54.247.62.1	192.168.2.13
Apr 22, 2025 08:35:26.332787991 CEST	57224	443	192.168.2.13	54.247.62.1
Apr 22, 2025 08:35:26.342389107 CEST	57224	443	192.168.2.13	54.247.62.1
Apr 22, 2025 08:35:26.342405081 CEST	443	57224	54.247.62.1	192.168.2.13
Apr 22, 2025 08:35:27.245934963 CEST	443	57224	54.247.62.1	192.168.2.13
Apr 22, 2025 08:35:27.246124029 CEST	57224	443	192.168.2.13	54.247.62.1
Apr 22, 2025 08:35:27.246613979 CEST	57224	443	192.168.2.13	54.247.62.1
Apr 22, 2025 08:35:27.246624947 CEST	443	57224	54.247.62.1	192.168.2.13
Apr 22, 2025 08:35:27.248126030 CEST	443	57224	54.247.62.1	192.168.2.13
Apr 22, 2025 08:35:27.248200893 CEST	57224	443	192.168.2.13	54.247.62.1
Apr 22, 2025 08:35:27.250169992 CEST	57224	443	192.168.2.13	54.247.62.1
Apr 22, 2025 08:35:27.250247955 CEST	443	57224	54.247.62.1	192.168.2.13
Apr 22, 2025 08:35:27.250315905 CEST	57224	443	192.168.2.13	54.247.62.1
Apr 22, 2025 08:35:27.250323057 CEST	443	57224	54.247.62.1	192.168.2.13
Apr 22, 2025 08:35:27.250375032 CEST	57224	443	192.168.2.13	54.247.62.1
Apr 22, 2025 08:35:27.525171995 CEST	443	57224	54.247.62.1	192.168.2.13
Apr 22, 2025 08:35:27.525299072 CEST	57224	443	192.168.2.13	54.247.62.1
Apr 22, 2025 08:35:27.525336027 CEST	443	57224	54.247.62.1	192.168.2.13
Apr 22, 2025 08:35:27.525352001 CEST	443	57224	54.247.62.1	192.168.2.13
Apr 22, 2025 08:35:27.525372982 CEST	57224	443	192.168.2.13	54.247.62.1
Apr 22, 2025 08:35:27.525556087 CEST	57224	443	192.168.2.13	54.247.62.1
Apr 22, 2025 08:35:27.525587082 CEST	443	57224	54.247.62.1	192.168.2.13
Apr 22, 2025 08:35:27.525615931 CEST	57224	443	192.168.2.13	54.247.62.1

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Apr 22, 2025 08:34:56.042506933 CEST	57767	53	192.168.2.13	1.1.1.1
Apr 22, 2025 08:34:56.042540073 CEST	46292	53	192.168.2.13	1.1.1.1
Apr 22, 2025 08:34:56.199587107 CEST	53	46292	1.1.1.1	192.168.2.13
Apr 22, 2025 08:34:56.306684017 CEST	53	57767	1.1.1.1	192.168.2.13

Timestamp	Bytes transferred	Direction	Data
2025-04-22 06:35:27 UTC	249	OUT	GET / HTTP/1.1 User-Agent: wget/1.20.3-1ubuntu1 Ubuntu/20.04.2/LTS GNU/Linux/5.4.0-72-generic/x86_64 Intel(R)/Xeon(R)/Silver/4210/CPU/@/2.20GHz cloud_id/none Accept: / Accept-Encoding: identity Host: motd.ubuntu.com Connection: Keep-Alive
2025-04-22 06:35:27 UTC	271	IN	HTTP/1.1 200 OK Date: Tue, 22 Apr 2025 06:35:27 GMT Server: Apache/2.4.18 (Ubuntu) Last-Modified: Tue, 01 Apr 2025 23:01:00 GMT ETag: "d8-631bf82a3c95e" Accept-Ranges: bytes Content-Length: 216 Vary: Accept-Encoding Connection: close Content-Type: text/plain
2025-04-22 06:35:27 UTC	216	IN	Data Raw: 20 2a 20 53 74 72 69 63 74 6c 79 20 63 6f 6e 66 69 6e 65 64 20 4b 75 62 65 72 6e 65 74 65 73 20 6d 61 6b 65 73 20 65 64 67 65 20 61 6e 64 20 49 6f 54 20 73 65 63 75 72 65 2e 20 4c 65 61 72 6e 20 68 6f 77 20 4d 69 63 72 6f 4b 38 73 0a 20 20 20 6a 75 73 74 20 72 61 69 73 65 64 20 74 68 65 20 62 61 72 20 66 6f 72 20 65 61 73 79 2c 20 72 65 73 69 6c 69 65 6e 74 20 61 6e 64 20 73 65 63 75 72 65 20 4b 38 73 20 63 6c 75 73 74 65 72 20 64 65 70 6c 6f 79 6d 65 6e 74 2e 0a 0a 20 20 20 68 74 74 70 73 3a 2f 2f 75 62 75 6e 74 75 2e 63 6f 6d 2f 65 6e 67 61 67 65 2f 73 65 63 75 72 65 2d 6b 75 62 65 72 6e 65 74 65 73 2d 61 74 2d 74 68 65 2d 65 64 67 65 0a Data Ascii: * Strictly confined Kubernetes makes edge and IoT secure. Learn how MicroK8s just raised the bar for easy, resilient and secure K8s cluster deployment. https://ubuntu.com/engage/secure-kubernetes-at-the-edge

Start time (UTC):	06:34:54
Start date (UTC):	22/04/2025
Path:	/tmp/tftp.elf
Arguments:	/tmp/tftp.elf
File size:	5777432 bytes
MD5 hash:	0083f1f0e77be34ad27f849842bbb00c

Start time (UTC):	06:35:27
Start date (UTC):	22/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Description:	Adversaries may delete files left behind by the actions of their intrusion activity. Malware, tools, or other non-native files dropped or created on a system by an adversary (ex: Ingress Tool Transfer ) may leave traces to indicate to what was done within a network and how. Removal of these files can occur during an intrusion, or as part of a post-intrusion process to minimize the adversary's footprint.
Tactics:	Defense Evasion
Data Sources:	Command: Command Execution, File: File Deletion
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to get a listing of security software, configurations, defensive tools, and sensors that are installed on a system or in a cloud environment. This may include things such as firewall rules and anti-virus. Adversaries may use the information from Security Software Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	Command: Command Execution, Firewall: Firewall Enumeration, Firewall: Firewall Metadata, Process: OS API Execution, Process: Process Creation
Platforms:	Azure AD, Google Workspace, IaaS, Linux, macOS, Office 365, SaaS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may employ a known encryption algorithm to conceal command and control traffic rather than relying on any inherent protections provided by a communication protocol. Despite the use of a secure algorithm, these implementations may be vulnerable to reverse engineering if secret keys are encoded and/or generated within malware samples/configuration files.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may use an OSI non-application layer protocol for communication between host and C2 server or among infected hosts within a network. The list of possible protocols is extensive.Specific examples include use of network layer protocols, such as the Internet Control Message Protocol (ICMP), transport layer protocols, such as the User Datagram Protocol (UDP), session layer protocols, such as Socket Secure (SOCKS), as well as redirected/tunneled protocols, such as Serial over LAN (SOL).
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow
Platforms:	Linux, macOS, Network, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may communicate using OSI application layer protocols to avoid detection/network filtering by blending in with existing traffic. Commands to the remote system, and often the results of those commands, will be embedded within the protocol traffic between the client and server.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may transfer tools or other files from an external system into a compromised environment. Tools or files may be copied from an external adversary-controlled system to the victim network through the command and control channel or through alternate protocols such as ftp . Once present, adversaries may also transfer/spread tools between victim devices within a compromised environment (i.e. Lateral Tool Transfer ).
Tactics:	Command and Control
Data Sources:	Command: Command Execution, File: File Creation, Network Traffic: Network Connection Creation, Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

Loading Joe Sandbox Report ...

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Linux Analysis Report tftp.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

Networking

System Summary

Persistence and Installation Behavior

Malware Analysis System Evasion

Mitre Att&ck Matrix

Malware Configuration

Behavior Graph

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Domains

URLs

Domains and IPs

Contacted Domains

Contacted URLs

World Map of Contacted IPs

Public IPs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

General

Network Behavior

Network Port Distribution

TCP Packets

UDP Packets

DNS Queries

DNS Answers

HTTP Request Dependency Graph

HTTPS Proxied Packets

System Behavior

Analysis Process: tftp.elf PID: 5424, Parent PID: 5348

General

File Activities

File Opened

File Read

Process Activities

Thread Sleep

System Activities

Query System Information (uname)

Chronological Activities

Analysis Process: dash PID: 5492, Parent PID: 3578

General

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 5492, Parent PID: 3578

General

File Activities

File Opened

File Deleted

File Read

Chronological Activities

Analysis Process: dash PID: 5493, Parent PID: 3578

General

Process Activities

Process Overlayed (Exec)

Linux Analysis Report
tftp.elf