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Linux Analysis Report
kyosh4.elf

Overview

General Information

Sample name:	kyosh4.elf
Analysis ID:	1665367
MD5:	f1ccf2e1832cb8bc8ab20e8ae1be3da5
SHA1:	aaae2b56f7a92e3ebef5089f2e4a187283d61e93
SHA256:	05c759be68ba7ea0d4b9a1735b109d81fafba566a5dda7aabd5b11330b3514e3
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	52
Range:	0 - 100

Signatures

Multi AV Scanner detection for submitted file

Sample deletes itself

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

Found strings indicative of a multi-platform dropper

Sample has stripped symbol table

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

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1665367
Start date and time:	2025-04-15 14:15:00 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 48s
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:	kyosh4.elf
Detection:	MAL
Classification:	mal52.evad.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/kyosh4.elf
PID:	6256
Exit Code:	0
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

kyosh4.elf (PID: 6256, Parent: 6181, MD5: 8943e5f8f8c280467b4472c15ae93ba9) Arguments: /tmp/kyosh4.elf

kyosh4.elf New Fork (PID: 6258, Parent: 6256)

dash New Fork (PID: 6305, Parent: 4336)

rm (PID: 6305, Parent: 4336, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.APpUGhnBvO /tmp/tmp.Cnxjz85I46 /tmp/tmp.bT2ZLDS3ye

dash New Fork (PID: 6306, Parent: 4336)

cat (PID: 6306, Parent: 4336, MD5: 7e9d213e404ad3bb82e4ebb2e1f2c1b3) Arguments: cat /tmp/tmp.APpUGhnBvO

dash New Fork (PID: 6307, Parent: 4336)

head (PID: 6307, Parent: 4336, MD5: fd96a67145172477dd57131396fc9608) Arguments: head -n 10

dash New Fork (PID: 6308, Parent: 4336)

tr (PID: 6308, Parent: 4336, MD5: fbd1402dd9f72d8ebfff00ce7c3a7bb5) Arguments: tr -d \\000-\\011\\013\\014\\016-\\037

dash New Fork (PID: 6309, Parent: 4336)

cut (PID: 6309, Parent: 4336, MD5: d8ed0ea8f22c0de0f8692d4d9f1759d3) Arguments: cut -c -80

dash New Fork (PID: 6310, Parent: 4336)

cat (PID: 6310, Parent: 4336, MD5: 7e9d213e404ad3bb82e4ebb2e1f2c1b3) Arguments: cat /tmp/tmp.APpUGhnBvO

dash New Fork (PID: 6311, Parent: 4336)

head (PID: 6311, Parent: 4336, MD5: fd96a67145172477dd57131396fc9608) Arguments: head -n 10

dash New Fork (PID: 6312, Parent: 4336)

tr (PID: 6312, Parent: 4336, MD5: fbd1402dd9f72d8ebfff00ce7c3a7bb5) Arguments: tr -d \\000-\\011\\013\\014\\016-\\037

dash New Fork (PID: 6313, Parent: 4336)

cut (PID: 6313, Parent: 4336, MD5: d8ed0ea8f22c0de0f8692d4d9f1759d3) Arguments: cut -c -80

dash New Fork (PID: 6314, Parent: 4336)

rm (PID: 6314, Parent: 4336, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.APpUGhnBvO /tmp/tmp.Cnxjz85I46 /tmp/tmp.bT2ZLDS3ye

cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Multi AV Scanner detection for submitted file

Source: kyosh4.elf	Virustotal: Detection: 8%			Perma Link
Source: kyosh4.elf	ReversingLabs: Detection: 13%

Source: unknown

HTTPS traffic detected: 54.171.230.55:443 -> 192.168.2.23:33606 version: TLS 1.2

Source: kyosh4.elf

String: /dev/watchdog/dev/misc/watchdog//proc/self/exe/status nothinglmao/bin/bashtelnetdvsftpdrebootwgetcurltftp

Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown	TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown	TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.43

Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 33606
Source: unknown	Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 33606 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 42836 -> 443

Source: unknown

HTTPS traffic detected: 54.171.230.55:443 -> 192.168.2.23:33606 version: TLS 1.2

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

Classification label: mal52.evad.linELF@0/0@0/0

Source: /usr/bin/dash (PID: 6305)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.APpUGhnBvO /tmp/tmp.Cnxjz85I46 /tmp/tmp.bT2ZLDS3ye			Jump to behavior
Source: /usr/bin/dash (PID: 6314)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.APpUGhnBvO /tmp/tmp.Cnxjz85I46 /tmp/tmp.bT2ZLDS3ye			Jump to behavior

Hooking and other Techniques for Hiding and Protection

Sample deletes itself

Source: /tmp/kyosh4.elf (PID: 6256)

File: /tmp/kyosh4.elf

Jump to behavior

Source: /tmp/kyosh4.elf (PID: 6256)

Queries kernel information via 'uname':

Jump to behavior

Source: kyosh4.elf, 6256.1.00007ffcdd77d000.00007ffcdd79e000.rw-.sdmp, kyosh4.elf, 6258.1.00007ffcdd77d000.00007ffcdd79e000.rw-.sdmp	Binary or memory string: Ox86_64/usr/bin/qemu-sh4/tmp/kyosh4.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/kyosh4.elf
Source: kyosh4.elf, 6256.1.00007ffcdd77d000.00007ffcdd79e000.rw-.sdmp, kyosh4.elf, 6258.1.00007ffcdd77d000.00007ffcdd79e000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-sh4
Source: kyosh4.elf, 6256.1.000055dd959b5000.000055dd95a18000.rw-.sdmp, kyosh4.elf, 6258.1.000055dd959b5000.000055dd95a18000.rw-.sdmp	Binary or memory string: U5!/etc/qemu-binfmt/sh4
Source: kyosh4.elf, 6256.1.000055dd959b5000.000055dd95a18000.rw-.sdmp, kyosh4.elf, 6258.1.000055dd959b5000.000055dd95a18000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/sh4

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	1 Scripting	Valid Accounts	Windows Management Instrumentation	1 Scripting	Path Interception	11 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	1 Application Layer Protocol	Exfiltration Over Bluetooth	Network Denial of Service

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
kyosh4.elf	8%	Virustotal		Browse
kyosh4.elf	14%	ReversingLabs	Linux.Backdoor.Gafgyt

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Contacted Domains

⊘No contacted domains info

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	ASN	ASN Name	Malicious
54.171.230.55	unknown	United States	16509	AMAZON-02US	false
109.202.202.202	unknown	Switzerland	13030	INIT7CH	false
91.189.91.43	unknown	United Kingdom	41231	CANONICAL-ASGB	false
91.189.91.42	unknown	United Kingdom	41231	CANONICAL-ASGB	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
54.171.230.55	m68k.elf	Get hash	malicious	Mirai	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	boatnet.m68k.elf	Get hash	malicious	Mirai	Browse
	boatnet.m68k.elf	Get hash	malicious	Mirai	Browse
109.202.202.202	kpLwzBouH4.elf	Get hash	malicious	Unknown	Browse	ch.archive.ubuntu.com/ubuntu/pool/main/f/firefox/firefox_92.0%2bbuild3-0ubuntu0.20.04.1_amd64.deb
91.189.91.43	Space.arm7.elf	Get hash	malicious	Mirai	Browse
	Space.x86.elf	Get hash	malicious	Unknown	Browse
	a-r.m-6.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	sh4.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
91.189.91.42	Space.arm7.elf	Get hash	malicious	Mirai	Browse
	Space.x86.elf	Get hash	malicious	Unknown	Browse
	a-r.m-6.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	sh4.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	Space.arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	Space.x86.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	a-r.m-6.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	sh4.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
CANONICAL-ASGB	Space.arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	Space.x86.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	a-r.m-6.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	sh4.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
AMAZON-02US	Scanned Page(s).pdf	Get hash	malicious	Unknown	Browse	3.170.91.82
	Space.spc.elf	Get hash	malicious	Mirai	Browse	54.247.62.1
	Space.arm7.elf	Get hash	malicious	Mirai	Browse	34.249.145.219
	Space.arm5.elf	Get hash	malicious	Unknown	Browse	54.247.62.1
	Space.sh4.elf	Get hash	malicious	Unknown	Browse	34.243.160.129
	Space.m68k.elf	Get hash	malicious	Mirai	Browse	54.247.62.1
	done1.ps1	Get hash	malicious	FormBook	Browse	143.204.29.58
	https://files.stample.com/browserUpload/59722db0-d3c0-43c0-b975-c51a1290a89d	Get hash	malicious	HTMLPhisher	Browse	3.163.115.83
	na.elf	Get hash	malicious	Prometei	Browse	52.11.240.239
	https://we.tl/t-IBThwlthXD?trk=dw_recover_expired_transfer&utm_campaign=dw_recover_expired_transfer&utm_medium=email&utm_source=wt_sendgrid&utm_template=pre_deletion_72hrs_email	Get hash	malicious	Unknown	Browse	3.248.132.116
INIT7CH	Space.arm7.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	Space.x86.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	a-r.m-6.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	sh4.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202

JA3 Fingerprints

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
fb4726d465c5f28b84cd6d14cedd13a7	na.elf	Get hash	malicious	Prometei	Browse	54.171.230.55
	na.elf	Get hash	malicious	Prometei	Browse	54.171.230.55
	edit.menu.elf	Get hash	malicious	Unknown	Browse	54.171.230.55
	na.elf	Get hash	malicious	Prometei	Browse	54.171.230.55
	na.elf	Get hash	malicious	Prometei	Browse	54.171.230.55
	resgod.arm.elf	Get hash	malicious	Mirai	Browse	54.171.230.55
	na.elf	Get hash	malicious	Prometei	Browse	54.171.230.55
	arm.elf	Get hash	malicious	Mirai	Browse	54.171.230.55
	na.elf	Get hash	malicious	Prometei	Browse	54.171.230.55
	na.elf	Get hash	malicious	Prometei	Browse	54.171.230.55

Dropped Files

⊘No context

Created / dropped Files

⊘No created / dropped files found

Static File Info

General

File type:	ELF 32-bit LSB executable, Renesas SH, version 1 (SYSV), statically linked, stripped
Entropy (8bit):	6.816558091466297
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	kyosh4.elf
File size:	26'904 bytes
MD5:	f1ccf2e1832cb8bc8ab20e8ae1be3da5
SHA1:	aaae2b56f7a92e3ebef5089f2e4a187283d61e93
SHA256:	05c759be68ba7ea0d4b9a1735b109d81fafba566a5dda7aabd5b11330b3514e3
SHA512:	973572e307cbec27b33b3a7a286ea3fe94531bea3a9afa128ba90a5dfef7a383a97db438d8c562c7a38fff337218b66e44dfaa0e018f2c62835ceb627a831238
SSDEEP:	384:CUIHTZ3IJTvT22Roon1Y0oXnU/ItqBAG5CV7d2Ym:oW22DoXnsIqC6Z
TLSH:	FCC24C93D8691E84D51D897CB4218F3C2F63E222DE875EFE502BC5168483D8EF45A3B9
File Content Preview:	.ELF.....................@.4....g......4. ...(...............@...@..e...e.............. e.. eA. eA.(...PH..........Q.td............................././"O.n........#.@........#.*@L_...o&O.n...l..............................././.../.a"O.!...n...a.b("...q.

Static ELF Info

ELF header
Class:	ELF32
Data:	2's complement, little endian
Version:	1 (current)
Machine:	<unknown>
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	UNIX - System V
ABI Version:	0
Entry Point Address:	0x4001a0
Flags:	0x9
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	26504
Section Header Size:	40
Number of Section Headers:	10
Header String Table Index:	9

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.init	PROGBITS	0x400094	0x94	0x30	0x0	0x6	AX	4
.text	PROGBITS	0x4000e0	0xe0	0x5f60	0x0	0x6	AX	32
.fini	PROGBITS	0x406040	0x6040	0x24	0x0	0x6	AX	4
.rodata	PROGBITS	0x406064	0x6064	0x4b8	0x0	0x2	A	4
.ctors	PROGBITS	0x416520	0x6520	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x416528	0x6528	0x8	0x0	0x3	WA	4
.data	PROGBITS	0x416534	0x6534	0x214	0x0	0x3	WA	4
.bss	NOBITS	0x416748	0x6748	0x24628	0x0	0x3	WA	4
.shstrtab	STRTAB	0x0	0x6748	0x3e	0x0	0x0		1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
LOAD	0x0	0x400000	0x400000	0x651c	0x651c	6.9010	0x5	R E	0x10000	.init .text .fini .rodata
LOAD	0x6520	0x416520	0x416520	0x228	0x24850	2.9825	0x6	RW	0x10000	.ctors .dtors .data .bss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x7	RWE	0x4

Network Behavior

Network Port Distribution

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Apr 15, 2025 14:15:48.707775116 CEST	43928	443	192.168.2.23	91.189.91.42
Apr 15, 2025 14:15:51.779318094 CEST	33606	443	192.168.2.23	54.171.230.55
Apr 15, 2025 14:15:54.083107948 CEST	42836	443	192.168.2.23	91.189.91.43
Apr 15, 2025 14:15:55.362947941 CEST	42516	80	192.168.2.23	109.202.202.202
Apr 15, 2025 14:16:05.089634895 CEST	33606	443	192.168.2.23	54.171.230.55
Apr 15, 2025 14:16:09.441056013 CEST	43928	443	192.168.2.23	91.189.91.42
Apr 15, 2025 14:16:19.679512024 CEST	42836	443	192.168.2.23	91.189.91.43
Apr 15, 2025 14:16:25.822665930 CEST	42516	80	192.168.2.23	109.202.202.202
Apr 15, 2025 14:16:31.965792894 CEST	33606	443	192.168.2.23	54.171.230.55
Apr 15, 2025 14:16:32.184166908 CEST	443	33606	54.171.230.55	192.168.2.23
Apr 15, 2025 14:16:35.625436068 CEST	443	33606	54.171.230.55	192.168.2.23
Apr 15, 2025 14:16:35.625467062 CEST	443	33606	54.171.230.55	192.168.2.23
Apr 15, 2025 14:16:35.625482082 CEST	443	33606	54.171.230.55	192.168.2.23
Apr 15, 2025 14:16:35.625658035 CEST	33606	443	192.168.2.23	54.171.230.55
Apr 15, 2025 14:16:35.625658035 CEST	33606	443	192.168.2.23	54.171.230.55
Apr 15, 2025 14:16:35.625658035 CEST	33606	443	192.168.2.23	54.171.230.55
Apr 15, 2025 14:16:35.626610041 CEST	33606	443	192.168.2.23	54.171.230.55
Apr 15, 2025 14:16:35.850591898 CEST	443	33606	54.171.230.55	192.168.2.23
Apr 15, 2025 14:16:35.850917101 CEST	443	33606	54.171.230.55	192.168.2.23
Apr 15, 2025 14:16:35.850986958 CEST	33606	443	192.168.2.23	54.171.230.55
Apr 15, 2025 14:16:35.851125956 CEST	33606	443	192.168.2.23	54.171.230.55
Apr 15, 2025 14:16:36.093856096 CEST	443	33606	54.171.230.55	192.168.2.23
Apr 15, 2025 14:16:36.094083071 CEST	33606	443	192.168.2.23	54.171.230.55
Apr 15, 2025 14:16:36.095577002 CEST	33606	443	192.168.2.23	54.171.230.55
Apr 15, 2025 14:16:36.332591057 CEST	443	33606	54.171.230.55	192.168.2.23
Apr 15, 2025 14:16:36.332631111 CEST	443	33606	54.171.230.55	192.168.2.23
Apr 15, 2025 14:16:36.332701921 CEST	33606	443	192.168.2.23	54.171.230.55
Apr 15, 2025 14:16:36.332701921 CEST	33606	443	192.168.2.23	54.171.230.55
Apr 15, 2025 14:16:50.395339966 CEST	43928	443	192.168.2.23	91.189.91.42
Apr 15, 2025 14:17:10.872486115 CEST	42836	443	192.168.2.23	91.189.91.43

HTTPS Connections

Timestamp	Source IP	Source Port	Dest IP	Dest Port	Subject	Issuer	Not Before	Not After	JA3 SSL Client Fingerprint	JA3 SSL Client Digest
Apr 15, 2025 14:16:35.625482082 CEST	54.171.230.55	443	192.168.2.23	33606	CN=motd.ubuntu.com CN=R10, O=Let's Encrypt, C=US	CN=R10, O=Let's Encrypt, C=US CN=ISRG Root X1, O=Internet Security Research Group, C=US	Sat Mar 22 09:18:05 CET 2025 Wed Mar 13 01:00:00 CET 2024	Fri Jun 20 10:18:04 CEST 2025 Sat Mar 13 00:59:59 CET 2027	771,4866-4867-4865-49196-49200-163-159-52393-52392-52394-49327-49325-49315-49311-49245-49249-49239-49235-49195-49199-162-158-49326-49324-49314-49310-49244-49248-49238-49234-49188-49192-107-106-49267-49271-196-195-49187-49191-103-64-49266-49270-190-189-49162-49172-57-56-136-135-49161-49171-51-50-69-68-157-49313-49309-49233-156-49312-49308-49232-61-192-60-186-53-132-47-65-255,0-11-10-35-22-23-13-43-45-51,29-23-30-25-24,0-1-2	fb4726d465c5f28b84cd6d14cedd13a7
Apr 15, 2025 14:16:35.625482082 CEST	54.171.230.55	443	192.168.2.23	33606	CN=R10, O=Let's Encrypt, C=US	CN=ISRG Root X1, O=Internet Security Research Group, C=US	Wed Mar 13 01:00:00 CET 2024	Sat Mar 13 00:59:59 CET 2027		fb4726d465c5f28b84cd6d14cedd13a7

System Behavior

Analysis Process: kyosh4.elf PID: 6256, Parent PID: 6181

General

Start time (UTC):	12:15:49
Start date (UTC):	15/04/2025
Path:	/tmp/kyosh4.elf
Arguments:	/tmp/kyosh4.elf
File size:	4139976 bytes
MD5 hash:	8943e5f8f8c280467b4472c15ae93ba9

Chronological Activities

Analysis Process: kyosh4.elf PID: 6258, Parent PID: 6256

General

Start time (UTC):	12:15:49
Start date (UTC):	15/04/2025
Path:	/tmp/kyosh4.elf
Arguments:	-
File size:	4139976 bytes
MD5 hash:	8943e5f8f8c280467b4472c15ae93ba9

Analysis Process: dash PID: 6305, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 6305, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.APpUGhnBvO /tmp/tmp.Cnxjz85I46 /tmp/tmp.bT2ZLDS3ye
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Chronological Activities

Analysis Process: dash PID: 6306, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: cat PID: 6306, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/cat
Arguments:	cat /tmp/tmp.APpUGhnBvO
File size:	43416 bytes
MD5 hash:	7e9d213e404ad3bb82e4ebb2e1f2c1b3

Chronological Activities

Analysis Process: dash PID: 6307, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: head PID: 6307, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/head
Arguments:	head -n 10
File size:	47480 bytes
MD5 hash:	fd96a67145172477dd57131396fc9608

Chronological Activities

Analysis Process: dash PID: 6308, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: tr PID: 6308, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/tr
Arguments:	tr -d \\000-\\011\\013\\014\\016-\\037
File size:	51544 bytes
MD5 hash:	fbd1402dd9f72d8ebfff00ce7c3a7bb5

Chronological Activities

Analysis Process: dash PID: 6309, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: cut PID: 6309, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/cut
Arguments:	cut -c -80
File size:	47480 bytes
MD5 hash:	d8ed0ea8f22c0de0f8692d4d9f1759d3

Chronological Activities

Analysis Process: dash PID: 6310, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: cat PID: 6310, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/cat
Arguments:	cat /tmp/tmp.APpUGhnBvO
File size:	43416 bytes
MD5 hash:	7e9d213e404ad3bb82e4ebb2e1f2c1b3

Chronological Activities

Analysis Process: dash PID: 6311, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: head PID: 6311, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/head
Arguments:	head -n 10
File size:	47480 bytes
MD5 hash:	fd96a67145172477dd57131396fc9608

Chronological Activities

Analysis Process: dash PID: 6312, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: tr PID: 6312, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/tr
Arguments:	tr -d \\000-\\011\\013\\014\\016-\\037
File size:	51544 bytes
MD5 hash:	fbd1402dd9f72d8ebfff00ce7c3a7bb5

Chronological Activities

Analysis Process: dash PID: 6313, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: cut PID: 6313, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/cut
Arguments:	cut -c -80
File size:	47480 bytes
MD5 hash:	d8ed0ea8f22c0de0f8692d4d9f1759d3

Chronological Activities

Analysis Process: dash PID: 6314, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 6314, Parent PID: 4336

General

Start time (UTC):	12:16:35
Start date (UTC):	15/04/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.APpUGhnBvO /tmp/tmp.Cnxjz85I46 /tmp/tmp.bT2ZLDS3ye
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Description:	This technique has been deprecated. Please use Command and Scripting Interpreter where appropriate.
Tactics:	Defense Evasion, Execution
Data Sources:
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

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 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 kyosh4.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Compliance

Spreading

Networking

System Summary

Persistence and Installation Behavior

Hooking and other Techniques for Hiding and Protection

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

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

Sections

Program Segments

Network Behavior

Network Port Distribution

TCP Packets

HTTPS Connections

System Behavior

Analysis Process: kyosh4.elf PID: 6256, Parent PID: 6181

General

Chronological Activities

Analysis Process: kyosh4.elf PID: 6258, Parent PID: 6256

General

Analysis Process: dash PID: 6305, Parent PID: 4336

General

Chronological Activities

Analysis Process: rm PID: 6305, Parent PID: 4336

General

Chronological Activities

Analysis Process: dash PID: 6306, Parent PID: 4336

General

Chronological Activities

Analysis Process: cat PID: 6306, Parent PID: 4336

General

Chronological Activities

Analysis Process: dash PID: 6307, Parent PID: 4336

General

Chronological Activities

Analysis Process: head PID: 6307, Parent PID: 4336

General

Chronological Activities

Linux Analysis Report
kyosh4.elf