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Linux Analysis Report
yakuza.sh4.elf

Overview

General Information

Sample name:	yakuza.sh4.elf
Analysis ID:	1646229
MD5:	389aba896910222f3992182127edaf93
SHA1:	a87a1441f76f44908c697c7bf63333c642eaa720
SHA256:	362dfb4e57705448f3428c1c1f74bf8492f49ba7e8c2b3a2d29ecbf6909bca85
Tags:	elfuser-abuse_ch
Infos:

Detection

Gafgyt, Mirai

Score:	80
Range:	0 - 100

Signatures

Antivirus / Scanner detection for submitted sample

Found malware configuration

Multi AV Scanner detection for submitted file

Yara detected Gafgyt

Yara detected Mirai

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

Sample and/or dropped files contains symbols with suspicious names

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

Sample contains strings that are user agent strings indicative of HTTP manipulation

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

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1646229
Start date and time:	2025-03-23 18:12:16 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 5m 18s
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:	yakuza.sh4.elf
Detection:	MAL
Classification:	mal80.troj.linELF@0/0@2/0

Warnings

VT rate limit hit for: 194.180.158.53:23

Runtime Messages

Command:	/tmp/yakuza.sh4.elf
PID:	5495
Exit Code:	0
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

yakuza.sh4.elf (PID: 5495, Parent: 5418, MD5: 8943e5f8f8c280467b4472c15ae93ba9) Arguments: /tmp/yakuza.sh4.elf

yakuza.sh4.elf New Fork (PID: 5497, Parent: 5495)

yakuza.sh4.elf New Fork (PID: 5499, Parent: 5497)

yakuza.sh4.elf New Fork (PID: 5505, Parent: 5499)

yakuza.sh4.elf New Fork (PID: 5571, Parent: 5505)

yakuza.sh4.elf New Fork (PID: 5590, Parent: 5571)

yakuza.sh4.elf New Fork (PID: 5607, Parent: 5590)

yakuza.sh4.elf New Fork (PID: 5626, Parent: 5607)

yakuza.sh4.elf New Fork (PID: 5652, Parent: 5626)

yakuza.sh4.elf New Fork (PID: 5669, Parent: 5652)

dash New Fork (PID: 5543, Parent: 3589)

rm (PID: 5543, Parent: 3589, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.pZzHEg4svZ /tmp/tmp.J9j6eZltEh /tmp/tmp.OiTBfV2Upw

dash New Fork (PID: 5544, Parent: 3589)

cat (PID: 5544, Parent: 3589, MD5: 7e9d213e404ad3bb82e4ebb2e1f2c1b3) Arguments: cat /tmp/tmp.pZzHEg4svZ

dash New Fork (PID: 5545, Parent: 3589)

head (PID: 5545, Parent: 3589, MD5: fd96a67145172477dd57131396fc9608) Arguments: head -n 10

dash New Fork (PID: 5546, Parent: 3589)

tr (PID: 5546, Parent: 3589, MD5: fbd1402dd9f72d8ebfff00ce7c3a7bb5) Arguments: tr -d \\000-\\011\\013\\014\\016-\\037

dash New Fork (PID: 5547, Parent: 3589)

cut (PID: 5547, Parent: 3589, MD5: d8ed0ea8f22c0de0f8692d4d9f1759d3) Arguments: cut -c -80

dash New Fork (PID: 5548, Parent: 3589)

cat (PID: 5548, Parent: 3589, MD5: 7e9d213e404ad3bb82e4ebb2e1f2c1b3) Arguments: cat /tmp/tmp.pZzHEg4svZ

dash New Fork (PID: 5549, Parent: 3589)

head (PID: 5549, Parent: 3589, MD5: fd96a67145172477dd57131396fc9608) Arguments: head -n 10

dash New Fork (PID: 5550, Parent: 3589)

tr (PID: 5550, Parent: 3589, MD5: fbd1402dd9f72d8ebfff00ce7c3a7bb5) Arguments: tr -d \\000-\\011\\013\\014\\016-\\037

dash New Fork (PID: 5551, Parent: 3589)

cut (PID: 5551, Parent: 3589, MD5: d8ed0ea8f22c0de0f8692d4d9f1759d3) Arguments: cut -c -80

dash New Fork (PID: 5552, Parent: 3589)

rm (PID: 5552, Parent: 3589, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.pZzHEg4svZ /tmp/tmp.J9j6eZltEh /tmp/tmp.OiTBfV2Upw

cleanup

Malware Threat Intel

Provided by

Name	Description	Attribution	Blogpost URLs	Link
Bashlite, Gafgyt	Bashlite is a malware family which infects Linux systems in order to launch distributed denial-of-service attacks (DDoS). Originally it was also known under the name Bashdoor, but this term now refers to the exploit method used by the malware. It has been used to launch attacks of up to 400 Gbps.	No Attribution	http://blog.trendmicro.com/trendlabs-security-intelligence/bashlite-affects-devices-running-on-busybox/ https://blog.cyber5w.com/gafgyt-backdoor-analysis https://blog.netlab.360.com/gafgtyt_tor-and-necro-are-on-the-move-again/ https://blog.netlab.360.com/public-cloud-threat-intelligence-202203/ https://blog.netlab.360.com/some_details_of_the_ddos_attacks_targeting_ukraine_and_russia_in_recent_days/	https://malpedia.caad.fkie.fraunhofer.de/details/elf.bashlite

Name	Description	Attribution	Blogpost URLs	Link
Mirai	Mirai is one of the first significant botnets targeting exposed networking devices running Linux. Found in August 2016 by MalwareMustDie, its name means "future" in Japanese. Nowadays it targets a wide range of networked embedded devices such as IP cameras, home routers (many vendors involved), and other IoT devices. Since the source code was published on "Hack Forums" many variants of the Mirai family appeared, infecting mostly home networks all around the world.	No Attribution	http://osint.bambenekconsulting.com/feeds/ http://www.simonroses.com/2016/10/mirai-ddos-botnet-source-code-binary-analysis/ https://blog.malwaremustdie.org/2020/02/mmd-0065-2021-linuxmirai-fbot-re.html https://blog.netlab.360.com/another-lilin-dvr-0-day-being-used-to-spread-mirai-en/ https://blog.netlab.360.com/mirai_ptea-botnet-is-exploiting-undisclosed-kguard-dvr-vulnerability-en/	https://malpedia.caad.fkie.fraunhofer.de/details/elf.mirai

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
yakuza.sh4.elf	JoeSecurity_Gafgyt	Yara detected Gafgyt	Joe Security
yakuza.sh4.elf	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security

Memory Dumps

Source	Rule	Description	Author
5495.1.00007f855c400000.00007f855c411000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
5497.1.00007f855c400000.00007f855c411000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
5590.1.00007f855c400000.00007f855c411000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
5505.1.00007f855c400000.00007f855c411000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
5626.1.00007f855c400000.00007f855c411000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
5607.1.00007f855c400000.00007f855c411000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
5499.1.00007f855c400000.00007f855c411000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
5652.1.00007f855c400000.00007f855c411000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
5571.1.00007f855c400000.00007f855c411000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
Click to see the 4 entries

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: yakuza.sh4.elf	String found in binary or memory: http://0.0.0.0/bins.sh;
Source: yakuza.sh4.elf	String found in binary or memory: http://fast.no/support/crawler.asp)
Source: yakuza.sh4.elf	String found in binary or memory: http://feedback.redkolibri.com/
Source: yakuza.sh4.elf	String found in binary or memory: http://www.baidu.com/search/spider.htm)
Source: yakuza.sh4.elf	String found in binary or memory: http://www.baidu.com/search/spider.html)
Source: yakuza.sh4.elf	String found in binary or memory: http://www.billybobbot.com/crawler/)

Source: unknown	Network traffic detected: HTTP traffic on port 54644 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 54644

Source: yakuza.sh4.elf	ELF static info symbol of initial sample: TelnetScanner
Source: yakuza.sh4.elf	ELF static info symbol of initial sample: payload
Source: yakuza.sh4.elf	ELF static info symbol of initial sample: tel_passwords
Source: yakuza.sh4.elf	ELF static info symbol of initial sample: tel_usernames

Source: Initial sample

String containing 'busybox' found: busybox

Source: classification engine

Classification label: mal80.troj.linELF@0/0@2/0

Source: yakuza.sh4.elf	ELF static info symbol of initial sample: /home/firmware/build/temp-sh4/gcc-core/gcc/config/sh/lib1funcs.asm
Source: yakuza.sh4.elf	ELF static info symbol of initial sample: /home/firmware/build/temp-sh4/gcc-core/gcc/config/sh/lib1funcs.asm
Source: yakuza.sh4.elf	ELF static info symbol of initial sample: libc/string/sh/sh4/memcpy.S
Source: yakuza.sh4.elf	ELF static info symbol of initial sample: libc/sysdeps/linux/sh/crt1.S
Source: yakuza.sh4.elf	ELF static info symbol of initial sample: libc/sysdeps/linux/sh/crti.S
Source: yakuza.sh4.elf	ELF static info symbol of initial sample: libc/sysdeps/linux/sh/crtn.S
Source: yakuza.sh4.elf	ELF static info symbol of initial sample: libc/sysdeps/linux/sh/vfork.S

Source: /usr/bin/dash (PID: 5543)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.pZzHEg4svZ /tmp/tmp.J9j6eZltEh /tmp/tmp.OiTBfV2Upw			Jump to behavior
Source: /usr/bin/dash (PID: 5552)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.pZzHEg4svZ /tmp/tmp.J9j6eZltEh /tmp/tmp.OiTBfV2Upw			Jump to behavior

Source: /tmp/yakuza.sh4.elf (PID: 5495)

Queries kernel information via 'uname':

Jump to behavior

Source: yakuza.sh4.elf, 5495.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5497.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5499.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5505.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5571.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5590.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5607.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5626.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5652.1.00007ffed765c000.00007ffed767d000.rw-.sdmp	Binary or memory string: tmx86_64/usr/bin/qemu-sh4/tmp/yakuza.sh4.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/yakuza.sh4.elf
Source: yakuza.sh4.elf, 5495.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5497.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5499.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5505.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5571.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5590.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5607.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5626.1.00007ffed765c000.00007ffed767d000.rw-.sdmp, yakuza.sh4.elf, 5652.1.00007ffed765c000.00007ffed767d000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-sh4
Source: yakuza.sh4.elf, 5495.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5497.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5499.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5505.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5571.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5590.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5607.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5626.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5652.1.00005639344e6000.0000563934549000.rw-.sdmp	Binary or memory string: N49V5!/etc/qemu-binfmt/sh4
Source: yakuza.sh4.elf, 5495.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5497.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5499.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5505.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5571.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5590.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5607.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5626.1.00005639344e6000.0000563934549000.rw-.sdmp, yakuza.sh4.elf, 5652.1.00005639344e6000.0000563934549000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/sh4

Stealing of Sensitive Information

Yara detected Gafgyt

Source: Yara match

File source: yakuza.sh4.elf, type: SAMPLE

Yara detected Mirai

Source: Yara match	File source: yakuza.sh4.elf, type: SAMPLE
Source: Yara match	File source: 5495.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5497.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5590.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5505.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5626.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5607.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5499.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5652.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5571.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY

Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36
Source: Initial sample	User agent string found: Opera/9.80 (X11; Linux i686; Ubuntu/14.10) Presto/2.12.388 Version/12.16
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows; U; Windows NT 6.1; rv:2.2) Gecko/20110201
Source: Initial sample	User agent string found: Opera/9.80 (Windows NT 5.2; U; ru) Presto/2.5.22 Version/10.51
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; AS; rv:11.0) like Gecko
Source: Initial sample	User agent string found: Mozilla/5.0 (Android; Linux armv7l; rv:9.0) Gecko/20111216 Firefox/9.0 Fennec/9.0
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.56 Safari/536.5
Source: Initial sample	User agent string found: Opera/9.80 (Windows NT 5.1; U; en) Presto/2.10.229 Version/11.60
Source: Initial sample	User agent string found: Mozilla/5.0 (iPad; U; CPU OS 5_1 like Mac OS X) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B367 Safari/531.21.10 UCBrowser/3.4.3.532
Source: Initial sample	User agent string found: Mozilla/5.0 (Nintendo WiiU) AppleWebKit/536.30 (KHTML, like Gecko) NX/3.0.4.2.12 NintendoBrowser/4.3.1.11264.US
Source: Initial sample	User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:25.0) Gecko/20100101 Firefox/25.0
Source: Initial sample	User agent string found: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; pl) Opera 11.00
Source: Initial sample	User agent string found: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; en) Opera 11.00
Source: Initial sample	User agent string found: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; ja) Opera 11.00
Source: Initial sample	User agent string found: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; cn) Opera 11.00
Source: Initial sample	User agent string found: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; fr) Opera 11.00
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20100101 Firefox/12.0
Source: Initial sample	User agent string found: Mozilla/5.0 (X11; U; Linux x86_64; de; rv:1.9.2.8) Gecko/20100723 Ubuntu/10.04 (lucid) Firefox/3.6.8
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20100101 Firefox/13.0.1
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:11.0) Gecko/20100101 Firefox/11.0
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:13.0) Gecko/20100101 Firefox/13.0.1
Source: Initial sample	User agent string found: Opera/9.80 (Windows NT 5.1; U; en) Presto/2.10.289 Version/12.01
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 5.1; rv:5.0.1) Gecko/20100101 Firefox/5.0.1
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.02
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.0) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/13.0.782.112 Safari/535.1
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36

Remote Access Functionality

Yara detected Gafgyt

Source: Yara match

File source: yakuza.sh4.elf, type: SAMPLE

Yara detected Mirai

Source: Yara match	File source: yakuza.sh4.elf, type: SAMPLE
Source: Yara match	File source: 5495.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5497.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5590.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5505.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5626.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5607.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5499.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5652.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5571.1.00007f855c400000.00007f855c411000.r-x.sdmp, type: MEMORY

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 Masquerading	OS Credential Dumping	11 Security Software Discovery	Remote Services	Data from Local System	1 Data Obfuscation	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	1 File Deletion	LSASS Memory	Application Window Discovery	Remote Desktop Protocol	Data from Removable Media	1 Encrypted Channel	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	2 Non-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	3 Application Layer Protocol	Traffic Duplication	Data Destruction
Gather Victim Network Information	Server	Cloud Accounts	Launchd	Network Logon Script	Network Logon Script	Software Packing	LSA Secrets	Internet Connection Discovery	SSH	Keylogging	1 Ingress Tool Transfer	Scheduled Transfer	Data Encrypted for Impact

Malware Configuration

Threatname: Gafgyt

{
  "C2 url": "194.180.158.53:23"
}

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
yakuza.sh4.elf	67%	Virustotal		Browse
yakuza.sh4.elf	69%	ReversingLabs	Linux.Trojan.Gafgyt
yakuza.sh4.elf	100%	Avira	EXP/ELF.Gafgyt.E

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
194.180.158.53:23	true		unknown

URLs from Memory and Binaries

Name	Source	Malicious	Reputation
http://www.baidu.com/search/spider.html)	yakuza.sh4.elf	false	high
http://www.billybobbot.com/crawler/)	yakuza.sh4.elf	false	high
http://fast.no/support/crawler.asp)	yakuza.sh4.elf	false	high
http://feedback.redkolibri.com/	yakuza.sh4.elf	false	high
http://www.baidu.com/search/spider.htm)	yakuza.sh4.elf	false	high
http://0.0.0.0/bins.sh;	yakuza.sh4.elf	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
194.180.158.53	unknown	unknown		39798	MIVOCLOUDMD	true
34.254.182.186	unknown	United States		16509	AMAZON-02US	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link
194.180.158.53	yakuza.x32.elf	Get hash	malicious	Gafgyt, Mirai	Browse
34.254.182.186	na.elf	Get hash	malicious	Prometei	Browse
	arm6.elf	Get hash	malicious	Mirai	Browse
	x.rar.elf	Get hash	malicious	Xmrig	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	main_x86_64.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	miner.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	Space.arm5.elf	Get hash	malicious	Unknown	Browse
	arm.elf	Get hash	malicious	Unknown	Browse

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	m68k.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	sshd.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	morte.arm7.elf	Get hash	malicious	Okiru	Browse	162.213.35.25
	morte.sh4.elf	Get hash	malicious	Gafgyt, Okiru	Browse	162.213.35.24
	morte.arm.elf	Get hash	malicious	Gafgyt, Okiru	Browse	162.213.35.24
	morte.arm6.elf	Get hash	malicious	Gafgyt, Okiru	Browse	162.213.35.24
	morte.m68k.elf	Get hash	malicious	Gafgyt, Okiru	Browse	162.213.35.25
	sshd.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	arm6.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	.i.elf	Get hash	malicious	Unknown	Browse	162.213.35.25

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
AMAZON-02US	updated.elf	Get hash	malicious	Unknown	Browse	54.171.230.55
	Setup.exe	Get hash	malicious	Unknown	Browse	18.238.55.96
	spc.elf	Get hash	malicious	Mirai	Browse	54.171.230.55
	sh4.elf	Get hash	malicious	Mirai	Browse	54.247.62.1
	i.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	na.elf	Get hash	malicious	Prometei	Browse	52.43.119.120
	na.elf	Get hash	malicious	Prometei	Browse	52.43.119.120
	na.elf	Get hash	malicious	Prometei	Browse	52.43.119.120
	miner.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	na.elf	Get hash	malicious	Prometei	Browse	52.43.119.120
MIVOCLOUDMD	yakuza.x32.elf	Get hash	malicious	Gafgyt, Mirai	Browse	194.180.158.53
	compited.ps1	Get hash	malicious	Unknown	Browse	5.181.157.225
	boatnet.arm7.elf	Get hash	malicious	Mirai	Browse	5.181.159.16
	boatnet.arm.elf	Get hash	malicious	Mirai	Browse	5.181.159.16
	boatnet.arm6.elf	Get hash	malicious	Mirai	Browse	5.181.159.16
	mips.elf	Get hash	malicious	Mirai	Browse	5.252.177.18
	U0443.pdf.js	Get hash	malicious	RMSRemoteAdmin	Browse	194.180.158.11
	43 15.pdf.js	Get hash	malicious	RMSRemoteAdmin	Browse	194.180.158.11
	https://040030025.blob.core.windows.net/factura/index.html	Get hash	malicious	Phisher	Browse	185.225.19.22
	scan_doc_000_132.js	Get hash	malicious	NetSupport RAT	Browse	5.181.159.212

JA3 Fingerprints

⊘No context

Dropped Files

⊘No context

Created / dropped Files

⊘No created / dropped files found

Source: yakuza.sh4.elf	Virustotal: Detection: 67%			Perma Link
Source: yakuza.sh4.elf	ReversingLabs: Detection: 69%

Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown	TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown	TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown	TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown	TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown	TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown	TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown	TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown	TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown	TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown	TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53
Source: unknown	TCP traffic detected without corresponding DNS query: 194.180.158.53

File type:	ELF 32-bit LSB executable, Renesas SH, version 1 (SYSV), statically linked, not stripped
Entropy (8bit):	6.633083778890203
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	yakuza.sh4.elf
File size:	95'921 bytes
MD5:	389aba896910222f3992182127edaf93
SHA1:	a87a1441f76f44908c697c7bf63333c642eaa720
SHA256:	362dfb4e57705448f3428c1c1f74bf8492f49ba7e8c2b3a2d29ecbf6909bca85
SHA512:	4a97b2be0f5f0e51c707706383849c61b2337c0ae75f02f24db61e4701b32a4f2ae6e60859b31933cd5021746ac4d902bec9fb2dc501d529345fdf1a0a012c24
SSDEEP:	1536:vghck8XcYT8z7XKDbTD1hulgkn2JxZ3CZ5h8OWI6MaRMnhR090jUeQfXm:quqvaDnulgT385h8OvYMhR090QeQfXm
TLSH:	D5933B0348615FB3C0456DB126FB59340B67BE260F4F1E9A752CAAF4474B8CEB41EBA4
File Content Preview:	.ELF.....................@.4...."......4. ...(...............@...@...........................B...B.....Hi..........Q.td............................././"O.n........#.@........#.*@.....o&O.n...l..............................././.../.a"O.!...n...a.b("...q.

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:	74244
Section Header Size:	40
Number of Section Headers:	16
Header String Table Index:	13

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Link	Info	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0	0	0
.init	PROGBITS	0x400094	0x94	0x30	0x0	0x6	AX	0	0	4
.text	PROGBITS	0x4000e0	0xe0	0xdec0	0x0	0x6	AX	0	0	32
.fini	PROGBITS	0x40dfa0	0xdfa0	0x24	0x0	0x6	AX	0	0	4
.rodata	PROGBITS	0x40dfc4	0xdfc4	0x2ffc	0x0	0x2	A	0	0	4
.eh_frame	PROGBITS	0x410fc0	0x10fc0	0x4	0x0	0x2	A	0	0	4
.ctors	PROGBITS	0x421000	0x11000	0x8	0x0	0x3	WA	0	0	4
.dtors	PROGBITS	0x421008	0x11008	0x8	0x0	0x3	WA	0	0	4
.jcr	PROGBITS	0x421010	0x11010	0x4	0x0	0x3	WA	0	0	4
.data	PROGBITS	0x421014	0x11014	0x5a4	0x0	0x3	WA	0	0	4
.got	PROGBITS	0x4215b8	0x115b8	0x10	0x4	0x3	WA	0	0	4
.bss	NOBITS	0x4215c8	0x115c8	0x6380	0x0	0x3	WA	0	0	4
.comment	PROGBITS	0x0	0x115c8	0xbd0	0x0	0x0		0	0	1
.shstrtab	STRTAB	0x0	0x12198	0x6b	0x0	0x0		0	0	1
.symtab	SYMTAB	0x0	0x12484	0x2ed0	0x10	0x0		15	274	4
.strtab	STRTAB	0x0	0x15354	0x235d	0x0	0x0		0	0	1

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
LOAD	0x0	0x400000	0x400000	0x10fc4	0x10fc4	6.9176	0x5	R E	0x10000	.init .text .fini .rodata .eh_frame
LOAD	0x11000	0x421000	0x421000	0x5c8	0x6948	3.6690	0x6	RW	0x10000	.ctors .dtors .jcr .data .got .bss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x7	RWE	0x4

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Mar 23, 2025 18:13:06.731262922 CET	39466	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:13:07.745254993 CET	39466	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:13:09.761838913 CET	39466	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:13:13.858793974 CET	39466	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:13:22.052920103 CET	39466	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:13:28.099936962 CET	54644	443	192.168.2.13	34.254.182.186
Mar 23, 2025 18:13:28.100044966 CET	443	54644	34.254.182.186	192.168.2.13
Mar 23, 2025 18:13:28.100158930 CET	54644	443	192.168.2.13	34.254.182.186
Mar 23, 2025 18:13:28.101824045 CET	54644	443	192.168.2.13	34.254.182.186
Mar 23, 2025 18:13:28.101864100 CET	443	54644	34.254.182.186	192.168.2.13
Mar 23, 2025 18:13:31.685234070 CET	443	54644	34.254.182.186	192.168.2.13
Mar 23, 2025 18:13:31.685667992 CET	54644	443	192.168.2.13	34.254.182.186
Mar 23, 2025 18:13:31.686161041 CET	54644	443	192.168.2.13	34.254.182.186
Mar 23, 2025 18:13:31.686197042 CET	443	54644	34.254.182.186	192.168.2.13
Mar 23, 2025 18:13:31.687553883 CET	443	54644	34.254.182.186	192.168.2.13
Mar 23, 2025 18:13:31.687676907 CET	54644	443	192.168.2.13	34.254.182.186
Mar 23, 2025 18:13:31.689661026 CET	54644	443	192.168.2.13	34.254.182.186
Mar 23, 2025 18:13:31.689774036 CET	443	54644	34.254.182.186	192.168.2.13
Mar 23, 2025 18:13:31.689826965 CET	54644	443	192.168.2.13	34.254.182.186
Mar 23, 2025 18:13:31.689836025 CET	443	54644	34.254.182.186	192.168.2.13
Mar 23, 2025 18:13:31.689881086 CET	54644	443	192.168.2.13	34.254.182.186
Mar 23, 2025 18:13:32.930432081 CET	443	54644	34.254.182.186	192.168.2.13
Mar 23, 2025 18:13:32.930682898 CET	443	54644	34.254.182.186	192.168.2.13
Mar 23, 2025 18:13:32.930690050 CET	54644	443	192.168.2.13	34.254.182.186
Mar 23, 2025 18:13:32.931421995 CET	54644	443	192.168.2.13	34.254.182.186
Mar 23, 2025 18:13:32.931477070 CET	443	54644	34.254.182.186	192.168.2.13
Mar 23, 2025 18:13:38.185107946 CET	39466	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:13:41.811068058 CET	39470	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:13:42.826406956 CET	39470	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:13:44.842745066 CET	39470	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:13:48.939780951 CET	39470	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:13:57.133814096 CET	39470	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:14:13.265934944 CET	39470	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:14:16.849071026 CET	39472	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:14:17.875129938 CET	39472	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:14:19.891614914 CET	39472	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:14:24.020822048 CET	39472	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:14:32.214799881 CET	39472	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:14:48.346812963 CET	39472	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:14:51.898232937 CET	39474	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:14:52.924066067 CET	39474	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:14:54.940577030 CET	39474	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:14:59.101679087 CET	39474	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:15:07.295655012 CET	39474	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:15:23.427695036 CET	39474	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:15:26.918473959 CET	39476	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:15:27.940802097 CET	39476	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:15:29.957433939 CET	39476	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:15:34.182440996 CET	39476	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:15:42.376473904 CET	39476	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:15:58.508539915 CET	39476	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:16:01.962086916 CET	39478	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:16:02.989706039 CET	39478	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:16:05.006198883 CET	39478	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:16:09.263415098 CET	39478	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:16:17.457889080 CET	39478	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:16:33.589622021 CET	39478	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:16:36.997643948 CET	39480	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:16:38.006648064 CET	39480	23	192.168.2.13	194.180.158.53
Mar 23, 2025 18:16:40.023082972 CET	39480	23	192.168.2.13	194.180.158.53

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Mar 23, 2025 18:15:48.847903967 CET	40266	53	192.168.2.13	1.1.1.1
Mar 23, 2025 18:15:48.847955942 CET	36511	53	192.168.2.13	1.1.1.1
Mar 23, 2025 18:15:48.948600054 CET	53	36511	1.1.1.1	192.168.2.13
Mar 23, 2025 18:15:48.949989080 CET	53	40266	1.1.1.1	192.168.2.13

Timestamp	Bytes transferred	Direction	Data
2025-03-23 17:13:31 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
2025-03-23 17:13:32 UTC	271	IN	HTTP/1.1 200 OK Date: Sun, 23 Mar 2025 17:13:32 GMT Server: Apache/2.4.18 (Ubuntu) Last-Modified: Sun, 23 Mar 2025 17:00:45 GMT ETag: "d8-631056dbc0414" Accept-Ranges: bytes Content-Length: 216 Vary: Accept-Encoding Connection: close Content-Type: text/plain
2025-03-23 17:13:32 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):	17:13:05
Start date (UTC):	23/03/2025
Path:	/tmp/yakuza.sh4.elf
Arguments:	/tmp/yakuza.sh4.elf
File size:	4139976 bytes
MD5 hash:	8943e5f8f8c280467b4472c15ae93ba9

Start time (UTC):	17:13:40
Start date (UTC):	23/03/2025
Path:	/tmp/yakuza.sh4.elf
Arguments:	-
File size:	4139976 bytes
MD5 hash:	8943e5f8f8c280467b4472c15ae93ba9

Start time (UTC):	17:14:16
Start date (UTC):	23/03/2025
Path:	/tmp/yakuza.sh4.elf
Arguments:	-
File size:	4139976 bytes
MD5 hash:	8943e5f8f8c280467b4472c15ae93ba9

Start time (UTC):	17:14:51
Start date (UTC):	23/03/2025
Path:	/tmp/yakuza.sh4.elf
Arguments:	-
File size:	4139976 bytes
MD5 hash:	8943e5f8f8c280467b4472c15ae93ba9

Start time (UTC):	17:15:26
Start date (UTC):	23/03/2025
Path:	/tmp/yakuza.sh4.elf
Arguments:	-
File size:	4139976 bytes
MD5 hash:	8943e5f8f8c280467b4472c15ae93ba9

Start time (UTC):	17:16:01
Start date (UTC):	23/03/2025
Path:	/tmp/yakuza.sh4.elf
Arguments:	-
File size:	4139976 bytes
MD5 hash:	8943e5f8f8c280467b4472c15ae93ba9

Start time (UTC):	17:16:36
Start date (UTC):	23/03/2025
Path:	/tmp/yakuza.sh4.elf
Arguments:	-
File size:	4139976 bytes
MD5 hash:	8943e5f8f8c280467b4472c15ae93ba9

Start time (UTC):	17:13:32
Start date (UTC):	23/03/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Description:	Adversaries may attempt to manipulate features of their artifacts to make them appear legitimate or benign to users and/or security tools. Masquerading occurs when the name or location of an object, legitimate or malicious, is manipulated or abused for the sake of evading defenses and observation. This may include manipulating file metadata, tricking users into misidentifying the file type, and giving legitimate task or service names.
Tactics:	Defense Evasion
Data Sources:	Command: Command Execution, File: File Metadata, File: File Modification, Image: Image Metadata, Process: OS API Execution, Process: Process Creation, Process: Process Metadata, Scheduled Job: Scheduled Job Metadata, Scheduled Job: Scheduled Job Modification, Service: Service Creation, Service: Service Metadata
Platforms:	Containers, 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

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

Loading Joe Sandbox Report ...

Warning!

Linux Analysis Report yakuza.sh4.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Warnings

Runtime Messages

Process Tree

Malware Threat Intel

Yara Signatures

Initial Sample

Memory Dumps

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Persistence and Installation Behavior

Malware Analysis System Evasion

Stealing of Sensitive Information

Remote Access Functionality

Mitre Att&ck Matrix

Malware Configuration

Threatname: Gafgyt

Behavior Graph

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Domains

URLs

Domains and IPs

Contacted Domains

Contacted URLs

URLs from Memory and Binaries

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

Symbols

Network Behavior

Network Port Distribution

TCP Packets

UDP Packets

DNS Queries

DNS Answers

HTTP Request Dependency Graph

HTTPS Proxied Packets

System Behavior

Analysis Process: yakuza.sh4.elf PID: 5495, Parent PID: 5418

General

File Activities

File Opened

File Read

Process Activities

Process Forked

Prctl Requested

Thread Sleep

System Activities

Query System Information (uname)

Chronological Activities

Linux Analysis Report
yakuza.sh4.elf

Description:	Adversaries may obfuscate command and control traffic to make it more difficult to detect. Command and control (C2) communications are hidden (but not necessarily encrypted) in an attempt to make the content more difficult to discover or decipher and to make the communication less conspicuous and hide commands from being seen. This encompasses many methods, such as adding junk data to protocol traffic, using steganography, or impersonating legitimate protocols.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content
Platforms:	Linux, macOS, 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