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Linux Analysis Report
kworker.elf

Overview

General Information

Sample name:	kworker.elf
Analysis ID:	1641113
MD5:	4f376b4a0f8ceebe4237c5509996be49
SHA1:	8e8aac1e95220dc2421aebf9dbcad4865bfeb60b
SHA256:	a7cb11dd46b3c940a2e7a620f0f32cbabd885cb80b62c330fbbda577d95cfb2f
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100

Signatures

Multi AV Scanner detection for submitted file

Detected TCP or UDP traffic on non-standard ports

ELF contains segments with high entropy indicating compressed/encrypted content

Sample contains only a LOAD segment without any section mappings

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

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1641113
Start date and time:	2025-03-18 03:13:33 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 6m 45s
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:	kworker.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/kworker.elf
PID:	5427
Exit Code:
Exit Code Info:
Killed:	True
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

kworker.elf (PID: 5427, Parent: 5353, MD5: 4f376b4a0f8ceebe4237c5509996be49) Arguments: /tmp/kworker.elf

cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

• AV Detection
• Networking
• System Summary
• Hooking and other Techniques for Hiding and Protection
• Malware Analysis System Evasion

Click to jump to signature section

Show All Signature Results

AV Detection

Multi AV Scanner detection for submitted file

Source: kworker.elf	Virustotal: Detection: 18%			Perma Link
Source: kworker.elf	ReversingLabs: Detection: 22%

Source: global traffic

TCP traffic: 192.168.2.13:59014 -> 198.98.48.4:55689

Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4
Source: unknown	TCP traffic detected without corresponding DNS query: 198.98.48.4

Source: global traffic

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

Source: LOAD without section mappings

Program segment: 0x400000

Source: classification engine

Classification label: mal48.linELF@0/0@2/0

Source: kworker.elf	Submission file: segment LOAD with 7.6408 entropy (max. 8.0)
Source: kworker.elf	Submission file: segment LOAD with 7.9204 entropy (max. 8.0)

Source: /tmp/kworker.elf (PID: 5427)

Queries kernel information via 'uname':

Jump to behavior

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 Obfuscated Files or Information	OS Credential Dumping	1 Security Software Discovery	Remote Services	Data from Local System	1 Non-Standard Port	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	1 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	1 Application Layer Protocol	Automated Exfiltration	Data Encrypted for Impact

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

Screenshots

Download Video

Thumbnails

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

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
kworker.elf	18%	Virustotal		Browse
kworker.elf	22%	ReversingLabs	Linux.Trojan.VShell

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

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
198.98.48.4	unknown	United States		53667	PONYNETUS	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
198.98.48.4	har.elf	Get hash	malicious	Unknown	Browse	198.98.48.4:3232/ws

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	sync.arm6.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	sync.arm5.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	.i.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	gigab.arm5.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	sync.x86.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	resgod.x86.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	gigab.ppc.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	sshd.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	.i.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	.i.elf	Get hash	malicious	Unknown	Browse	162.213.35.24

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
PONYNETUS	arm.elf	Get hash	malicious	Mirai	Browse	107.189.4.201
	mpsl.elf	Get hash	malicious	Mirai	Browse	107.189.4.201
	arm7.elf	Get hash	malicious	Mirai	Browse	107.189.4.201
	Q3N5HdmTIp.exe	Get hash	malicious	Unknown	Browse	107.189.1.160
	Space.m68k.elf	Get hash	malicious	Mirai	Browse	209.141.59.9
	Space.x86.elf	Get hash	malicious	Unknown	Browse	209.141.59.9
	Space.ppc.elf	Get hash	malicious	Unknown	Browse	209.141.59.9
	Space.i686.elf	Get hash	malicious	Unknown	Browse	209.141.59.9
	Space.sh4.elf	Get hash	malicious	Unknown	Browse	209.141.59.9
	boatnet.mips.elf	Get hash	malicious	Mirai	Browse	209.141.36.93

JA3 Fingerprints

⊘No context

Dropped Files

⊘No context

Created / dropped Files

⊘No created / dropped files found

Static File Info

General

File type:	ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, no section header
Entropy (8bit):	7.920396771324358
TrID:	ELF Executable and Linkable format (Linux) (4029/14) 50.16% ELF Executable and Linkable format (generic) (4004/1) 49.84%
File name:	kworker.elf
File size:	2'877'348 bytes
MD5:	4f376b4a0f8ceebe4237c5509996be49
SHA1:	8e8aac1e95220dc2421aebf9dbcad4865bfeb60b
SHA256:	a7cb11dd46b3c940a2e7a620f0f32cbabd885cb80b62c330fbbda577d95cfb2f
SHA512:	499325235e2a66856adef4c7978c61303ab8f0e2767ea2654e81a0ac6bb88cfb4cbe5579fc8be7400cf1f720835e37085a135591c41b8f773d73cd8ac4cb4b38
SSDEEP:	49152:nM/6zyU33rlPEvfJ5owG2PnfWrjppt9Jumc/hlGLKV2uS3CtPD1:M693rlPefrG2PfWjp/5c/lV2LStp
TLSH:	67D533F36DC107A1D3F52B9ED39A4EF0E9D25A5310401AF1E64F0AC86EFBB715262216
File Content Preview:	.ELF..............>.....P\......@...................@.8...........................@.......@..............~{.............................................+.+.....+.+.............Q.td.......................................................<;Sg!..........x...=

Static ELF Info

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:	0xe75c50
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

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align
LOAD	0x0	0x400000	0x400000	0x1000	0x7b7e10	7.6408	0x6	RW	0x1000
LOAD	0x0	0xbb8000	0xbb8000	0x2be72b	0x2be72b	7.9204	0x5	R E	0x1000
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x6	RW	0x8

Network Behavior

Download Network PCAP: filtered – full

Network Port Distribution

Total Packets: 122
• 55689 undefined
• 53 (DNS)

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Mar 18, 2025 03:14:20.994884014 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:20.999619007 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:20.999686003 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:21.000355959 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:21.001588106 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:21.002970934 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:21.004174948 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:21.005101919 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:21.006287098 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:21.007658958 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:21.008915901 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:21.472961903 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:21.473120928 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:21.475464106 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:21.476603031 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:21.480109930 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:21.481292963 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:22.531662941 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:22.531750917 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.534518957 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.535680056 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.539176941 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:22.540366888 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:22.636445045 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:22.636594057 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.639621973 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.641016006 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.644263029 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:22.645709038 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:22.920342922 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:22.926038980 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.926563025 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.931005001 CET	55689	59014	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:22.931058884 CET	59014	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.931210995 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:22.931257963 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.932161093 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.933907986 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.935830116 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.936784983 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:22.937483072 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:22.938529968 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:22.940525055 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:22.942167997 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:23.406435013 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:23.406712055 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:23.410409927 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:23.412375927 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:23.415110111 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:23.417011976 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:23.937514067 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:23.937783957 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:23.941461086 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:23.943424940 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:23.945441008 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:23.946121931 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:23.948101044 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:23.950171947 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:23.950222969 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:23.951181889 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:23.953164101 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:23.955080032 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:23.955836058 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:23.957112074 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:23.957855940 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:23.959801912 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:23.961860895 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:24.424384117 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:24.424525023 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:24.428256035 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:24.430027008 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:24.432858944 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:24.434715033 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:24.974462032 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:24.974592924 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:24.978276014 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:24.979939938 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:24.982343912 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:24.983043909 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:24.984529018 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:24.984652996 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:24.986515999 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:24.987060070 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:24.988277912 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:24.989248991 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:24.991266966 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:24.992933035 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:25.080617905 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:25.080709934 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:25.087560892 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:25.089288950 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:25.091475964 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:25.092214108 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:25.093375921 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:25.093944073 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:25.096092939 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:25.098084927 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:25.184815884 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:25.225313902 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:29.982573032 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:29.984647036 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:29.986453056 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:29.987303019 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:29.988545895 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:29.989223003 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:29.991041899 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:29.993177891 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:30.101485968 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:30.101658106 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:34.983190060 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:34.985963106 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:34.988109112 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:34.988300085 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:34.990586996 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:34.990601063 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:34.992943048 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:34.995269060 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:35.081506014 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:35.081605911 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:35.089648008 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:35.092097998 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:35.094266891 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:35.094315052 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:35.096013069 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:35.096744061 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:35.098928928 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:35.100709915 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:35.173865080 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:35.173938036 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:38.977262974 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:38.982068062 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:39.982696056 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:39.984673023 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:39.986531019 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:39.987479925 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:39.988522053 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:39.989351034 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:39.991281986 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:39.993225098 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:40.101634979 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:40.101811886 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:44.983057976 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:44.984935045 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:44.986892939 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:44.987795115 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:44.988759041 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:44.989588976 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:44.991588116 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:44.993392944 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:45.080879927 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:45.081012011 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:45.087951899 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:45.090146065 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:45.092178106 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:45.092622042 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:45.094039917 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:45.094788074 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:45.096910954 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:45.098731995 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:45.173155069 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:45.173324108 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:49.983717918 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:49.986717939 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:49.988605976 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:49.989850044 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:49.991400957 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:49.992603064 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:49.994607925 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:49.997309923 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:50.117639065 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:50.117729902 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:50.215779066 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:50.215904951 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:54.017271042 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:54.022046089 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:54.983073950 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:54.985668898 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:54.987832069 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:54.988326073 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:54.990396023 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:54.990755081 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:54.993036985 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:54.995400906 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:55.080812931 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:55.080935001 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:55.082818985 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:55.082859039 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:55.091193914 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:55.094017982 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:55.095935106 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:55.096201897 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:55.098469019 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:55.098691940 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:55.100855112 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:55.103075027 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:55.173257113 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:55.217307091 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:59.983378887 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:59.985748053 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:59.988142967 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:59.988183022 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:59.990489960 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:14:59.990541935 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:59.994023085 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:14:59.995496035 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:00.117762089 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:00.117924929 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:04.983098030 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:04.985008001 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:04.986807108 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:04.987868071 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:04.988586903 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:04.989644051 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:04.991550922 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:04.993292093 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:05.080960035 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:05.081047058 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:05.082062960 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:05.082113981 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:05.088592052 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:05.090424061 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:05.092330933 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:05.093244076 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:05.094172955 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:05.095063925 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:05.096946955 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:05.098891020 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:05.173301935 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:05.173367977 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:06.011140108 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:06.011157990 CET	59016	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:06.016036987 CET	55689	59018	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:06.016077042 CET	59018	55689	192.168.2.13	198.98.48.4
Mar 18, 2025 03:15:06.016433954 CET	55689	59016	198.98.48.4	192.168.2.13
Mar 18, 2025 03:15:06.016488075 CET	59016	55689	192.168.2.13	198.98.48.4

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Mar 18, 2025 03:17:07.607614040 CET	58081	53	192.168.2.13	8.8.8.8
Mar 18, 2025 03:17:07.607670069 CET	42175	53	192.168.2.13	8.8.8.8
Mar 18, 2025 03:17:07.613643885 CET	53	58081	8.8.8.8	192.168.2.13
Mar 18, 2025 03:17:07.613925934 CET	53	42175	8.8.8.8	192.168.2.13

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Mar 18, 2025 03:17:07.607614040 CET	192.168.2.13	8.8.8.8	0x2bff	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Mar 18, 2025 03:17:07.607670069 CET	192.168.2.13	8.8.8.8	0x305c	Standard query (0)	daisy.ubuntu.com	28	IN (0x0001)	false

DNS Answers

Timestamp	Source IP	Dest IP	Trans ID	Reply Code	Name	CName	Address	Type	Class	DNS over HTTPS
Mar 18, 2025 03:17:07.613643885 CET	8.8.8.8	192.168.2.13	0x2bff	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false
Mar 18, 2025 03:17:07.613643885 CET	8.8.8.8	192.168.2.13	0x2bff	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: kworker.elf PID: 5427, Parent PID: 5353

General

Start time (UTC):	02:14:19
Start date (UTC):	18/03/2025
Path:	/tmp/kworker.elf
Arguments:	/tmp/kworker.elf
File size:	2877348 bytes
MD5 hash:	4f376b4a0f8ceebe4237c5509996be49

Description:	Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents on the system or in transit. This is common behavior that can be used across different platforms and the network to evade defenses.
Tactics:	Defense Evasion
Data Sources:	Command: Command Execution, File: File Creation, File: File Metadata, Module: Module Load, Process: OS API Execution, Process: Process Creation, Script: Script Execution, WMI: WMI Creation, Windows Registry: Windows Registry Key Creation
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 communicate using a protocol and port pairing that are typically not associated. For example, HTTPS over port 8088or port 587as opposed to the traditional port 443. Adversaries may make changes to the standard port used by a protocol to bypass filtering or muddle analysis/parsing of network data.
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 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

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

Loading Joe Sandbox Report ...

Warning!

Linux Analysis Report kworker.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Hooking and other Techniques for Hiding and Protection

Malware Analysis System Evasion

Mitre Att&ck Matrix

Malware Configuration

Behavior Graph

Screenshots

Thumbnails

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Domains

URLs

Domains and IPs

Contacted Domains

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

Static ELF Info

ELF header

Program Segments

Network Behavior

Network Port Distribution

TCP Packets

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: kworker.elf PID: 5427, Parent PID: 5353

General

File Activities

File Opened

File Read

Process Activities

Thread Sleep

System Activities

Query System Information (uname)

Network Activities

Socket Connecting

Chronological Activities

Linux Analysis Report
kworker.elf