Linux Analysis Report
cayo.arm7.elf

Overview

General Information

Sample name:	cayo.arm7.elf
Analysis ID:	1521418
MD5:	d71764370ef5157a82e4c28805612ed0
SHA1:	3fa10032373ec8cdaeebb0c878ea42c9f90547f9
SHA256:	7acd635448d76f937529575beccb06aae61b45d4abd94e78fc536b446b4e6d85
Tags:	cayoelfuser-NDA0E
Infos:

Detection

Mirai, Gafgyt

Score:	100
Range:	0 - 100
Whitelisted:	false

Signatures

Antivirus / Scanner detection for submitted sample

Detected Mirai

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Suricata IDS alerts for network traffic

Yara detected Gafgyt

Yara detected Mirai

Opens /proc/net/* files useful for finding connected devices and routers

Detected TCP or UDP traffic on non-standard ports

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

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

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

Yara signature match

Classification

Malware Threat Intel
Provided by

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

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

Signatures

AV Detection

Antivirus / Scanner detection for submitted sample

Source: cayo.arm7.elf

Avira: detected

Multi AV Scanner detection for submitted file

Source: cayo.arm7.elf

ReversingLabs: Detection: 42%

Spreading

Opens /proc/net/* files useful for finding connected devices and routers

Source: /tmp/cayo.arm7.elf (PID: 5487)

Opens: /proc/net/route

Jump to behavior

Networking

Suricata IDS alerts for network traffic

Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58816
Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58818
Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58812
Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58804
Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58806
Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58802
Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58822
Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58820
Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58814
Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58810
Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58808
Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58824
Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58826
Source: Network traffic	Suricata IDS: 2840516 - Severity 1 - ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message : 207.244.199.83:8008 -> 192.168.2.14:58828

Detected TCP or UDP traffic on non-standard ports

Source: global traffic

TCP traffic: 192.168.2.14:58802 -> 207.244.199.83:8008

Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83
Source: unknown	TCP traffic detected without corresponding DNS query: 207.244.199.83

Source: global traffic

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

Source: cayo.arm7.elf

String found in binary or memory: https://www.gnu.org/software/libc/bugs.html

System Summary

Malicious sample detected (through community Yara rule)

Source: cayo.arm7.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5491.1.00007f15b801f000.00007f15b80b3000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5487.1.00007f15b801f000.00007f15b80b3000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5489.1.00007f15b801f000.00007f15b80b3000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: cayo.arm7.elf PID: 5487, type: MEMORYSTR	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: cayo.arm7.elf PID: 5489, type: MEMORYSTR	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: cayo.arm7.elf PID: 5491, type: MEMORYSTR	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown

Yara signature match

Source: cayo.arm7.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16
Source: 5491.1.00007f15b801f000.00007f15b80b3000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16
Source: 5487.1.00007f15b801f000.00007f15b80b3000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16
Source: 5489.1.00007f15b801f000.00007f15b80b3000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16
Source: Process Memory Space: cayo.arm7.elf PID: 5487, type: MEMORYSTR	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16
Source: Process Memory Space: cayo.arm7.elf PID: 5489, type: MEMORYSTR	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16
Source: Process Memory Space: cayo.arm7.elf PID: 5491, type: MEMORYSTR	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16

Source: classification engine

Classification label: mal100.spre.troj.linELF@0/0@2/0

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

Source: /usr/bin/dash (PID: 5475)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.H1exLYzdDd /tmp/tmp.F4EIyQ4tQL /tmp/tmp.D3iSmRZF42			Jump to behavior
Source: /usr/bin/dash (PID: 5476)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.H1exLYzdDd /tmp/tmp.F4EIyQ4tQL /tmp/tmp.D3iSmRZF42			Jump to behavior

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

Source: /tmp/cayo.arm7.elf (PID: 5487)

Queries kernel information via 'uname':

Jump to behavior

Source: cayo.arm7.elf, 5487.1.00007ffd616f8000.00007ffd61719000.rw-.sdmp, cayo.arm7.elf, 5489.1.00007ffd616f8000.00007ffd61719000.rw-.sdmp, cayo.arm7.elf, 5491.1.00007ffd616f8000.00007ffd61719000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/cayo.arm7.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/cayo.arm7.elf
Source: cayo.arm7.elf, 5487.1.000055bd29fd7000.000055bd2a12a000.rw-.sdmp, cayo.arm7.elf, 5489.1.000055bd29fd7000.000055bd2a12a000.rw-.sdmp, cayo.arm7.elf, 5491.1.000055bd29fd7000.000055bd2a12a000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/arm
Source: cayo.arm7.elf, 5487.1.000055bd29fd7000.000055bd2a12a000.rw-.sdmp, cayo.arm7.elf, 5489.1.000055bd29fd7000.000055bd2a12a000.rw-.sdmp, cayo.arm7.elf, 5491.1.000055bd29fd7000.000055bd2a12a000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: cayo.arm7.elf, 5487.1.00007ffd616f8000.00007ffd61719000.rw-.sdmp, cayo.arm7.elf, 5489.1.00007ffd616f8000.00007ffd61719000.rw-.sdmp, cayo.arm7.elf, 5491.1.00007ffd616f8000.00007ffd61719000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm

Stealing of Sensitive Information

Yara detected Gafgyt

Source: Yara match

File source: cayo.arm7.elf, type: SAMPLE

Yara detected Mirai

Source: Yara match	File source: cayo.arm7.elf, type: SAMPLE
Source: Yara match	File source: 5491.1.00007f15b801f000.00007f15b80b3000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5487.1.00007f15b801f000.00007f15b80b3000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5489.1.00007f15b801f000.00007f15b80b3000.r-x.sdmp, type: MEMORY

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

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; de) Opera 11.01
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 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0
Source: Initial sample	User agent string found: Mozilla/5.0 (iPhone; CPU iPhone OS 8_4 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12H143 Safari/600.1.4
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:41.0) Gecko/20100101 Firefox/41.0
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 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/46.0.2490.80 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11) AppleWebKit/601.1.56 (KHTML, like Gecko) Version/9.0 Safari/601.1.56
Source: Initial sample	User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.7 (KHTML, like Gecko) Version/9.0.1 Safari/601.2.7
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
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: 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 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.75.14 (KHTML, like Gecko) Version/7.0.3 Safari/7046A194A
Source: Initial sample	User agent string found: Mozilla/5.0 (Windows NT 10.0; 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) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.94 Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Linux; Android 4.4.3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.89 Mobile Safari/537.36
Source: Initial sample	User agent string found: Mozilla/5.0 (Linux; Android 4.4.3; HTC_0PCV2 Build/KTU84L) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36
Source: Initial sample	User agent string found: Mozilla/4.0 (compatible; MSIE 8.0; X11; Linux x86_64; pl) Opera 11.00
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/5.0 (Macintosh; Intel Mac OS X 10.8; rv:21.0) Gecko/20100101 Firefox/21.0
Source: Initial sample	User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:24.0) Gecko/20100101 Firefox/24.0
Source: Initial sample	User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10; rv:33.0) Gecko/20100101 Firefox/33.0

Remote Access Functionality

Detected Mirai

Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message
Source: Traffic	Suricata IDS: ETPRO MALWARE ELF/BASHLITE/Mirai Cayosin Variant CnC Server Message

Yara detected Gafgyt

Source: Yara match

File source: cayo.arm7.elf, type: SAMPLE

Yara detected Mirai

Source: Yara match	File source: cayo.arm7.elf, type: SAMPLE
Source: Yara match	File source: 5491.1.00007f15b801f000.00007f15b80b3000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5487.1.00007f15b801f000.00007f15b80b3000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: 5489.1.00007f15b801f000.00007f15b80b3000.r-x.sdmp, type: MEMORY

Screenshots

Network Map

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

Contacted Public IPs

IP	Domain	Country	Flag	ASN	ASN Name	Malicious
207.244.199.83	unknown	United States		6428	CDMUS	true

Contacted Domains

Name	IP	Active
daisy.ubuntu.com	162.213.35.24	true

ID:	1521418
Product:	CloudBasic
Start time:	10:34:10
Start date:	28.09.2024
Sample:	cayo.arm7.elf
Cookbook:	defaultlinuxfilecookbook.jbs
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)
Architecture:	LINUX
MD5:	d71764370ef5157a82e4c28805612ed0
SHA1:	3fa10032373ec8cdaeebb0c878ea42c9f90547f9
SHA256:	7acd635448d76f937529575beccb06aae61b45d4abd94e78fc536b446b4e6d85
Filetype:	ELF Executable and Linkable format (generic) (4004/1) 100.00%

Linux Analysis Report
cayo.arm7.elf

Overview

General Information

Detection

Signatures

Classification

Malware Threat Intel
Provided by

Signatures

AV Detection

Spreading

Networking

System Summary

Persistence and Installation Behavior

Malware Analysis System Evasion

Stealing of Sensitive Information

Remote Access Functionality

Screenshots

Network Map

Contacted Public IPs

Contacted Domains

Linux Analysis Report cayo.arm7.elf

Overview

General Information

Detection

Signatures

Classification

Malware Threat Intel Provided by

Signatures

AV Detection

Spreading

Networking

System Summary

Persistence and Installation Behavior

Malware Analysis System Evasion

Stealing of Sensitive Information

Remote Access Functionality

Screenshots

Network Map

Contacted Public IPs

Contacted Domains

Linux Analysis Report
cayo.arm7.elf

Malware Threat Intel
Provided by