Linux Analysis Report
FBI.sh4.elf

Overview

General Information

Sample name:	FBI.sh4.elf
Analysis ID:	1542895
MD5:	b1f662abfdb22d1b0fe96da141637274
SHA1:	6e27cdbc13eae576f8806f80ef5a08de6dbd0dae
SHA256:	cc173070d6d0d5c1d1e425be668726042fda8d5ecc17eb2614bb1fe2d7ed761a
Tags:	200botnetelfFBIGafgytYakuzauser-NDA0E
Infos:

Detection

Gafgyt, Mirai

Score:	80
Range:	0 - 100
Whitelisted:	false

Signatures

Antivirus / Scanner detection for submitted sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Yara detected Gafgyt

Yara detected Mirai

Detected TCP or UDP traffic on non-standard ports

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

Sample has stripped symbol table

Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)

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
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

Signatures

AV Detection

Antivirus / Scanner detection for submitted sample

Source: FBI.sh4.elf

Avira: detected

Multi AV Scanner detection for submitted file

Source: FBI.sh4.elf

ReversingLabs: Detection: 60%

Detected TCP or UDP traffic on non-standard ports

Source: global traffic

TCP traffic: 192.168.2.23:34964 -> 154.213.187.206:1337

Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)

Source: global traffic	TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global traffic	TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: global traffic	TCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80

Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206
Source: unknown	TCP traffic detected without corresponding DNS query: 154.213.187.206

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

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

System Summary

Malicious sample detected (through community Yara rule)

Source: FBI.sh4.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: FBI.sh4.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: 6253.1.00007ff2ac400000.00007ff2ac416000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 6253.1.00007ff2ac400000.00007ff2ac416000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: Process Memory Space: FBI.sh4.elf PID: 6253, type: MEMORYSTR	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: FBI.sh4.elf PID: 6253, type: MEMORYSTR	Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown

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

Source: Initial sample	String containing 'busybox' found: busybox
Source: Initial sample	String containing 'busybox' found: BusyBox
Source: Initial sample	String containing 'busybox' found: 20+!g}]/proc/self/maps/proc//mapsameccountoginnterhraseordeyshellsystemenablebusyboxBusyBoxBuilt-in45.81.39.172

Sample has stripped symbol table

Source: ELF static info symbol of initial sample

.symtab present: no

Yara signature match

Source: FBI.sh4.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: FBI.sh4.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_ea92cca8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = aa4aee9f3d6bedd8234eaf8778895a0f5d71c42b21f2a428f01f121e85704e8e, id = ea92cca8-bba7-4a1c-9b88-a2d051ad0021, last_modified = 2021-09-16
Source: 6253.1.00007ff2ac400000.00007ff2ac416000.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: 6253.1.00007ff2ac400000.00007ff2ac416000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_ea92cca8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = aa4aee9f3d6bedd8234eaf8778895a0f5d71c42b21f2a428f01f121e85704e8e, id = ea92cca8-bba7-4a1c-9b88-a2d051ad0021, last_modified = 2021-09-16
Source: Process Memory Space: FBI.sh4.elf PID: 6253, 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: FBI.sh4.elf PID: 6253, type: MEMORYSTR	Matched rule: Linux_Trojan_Gafgyt_ea92cca8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = aa4aee9f3d6bedd8234eaf8778895a0f5d71c42b21f2a428f01f121e85704e8e, id = ea92cca8-bba7-4a1c-9b88-a2d051ad0021, last_modified = 2021-09-16

Source: classification engine

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

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

Source: /tmp/FBI.sh4.elf (PID: 6253)

Queries kernel information via 'uname':

Jump to behavior

Source: FBI.sh4.elf, 6253.1.00007ffe32737000.00007ffe32758000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-sh4/tmp/FBI.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/FBI.sh4.elf
Source: FBI.sh4.elf, 6253.1.00007ffe32737000.00007ffe32758000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-sh4
Source: FBI.sh4.elf, 6253.1.00005587493ff000.0000558749462000.rw-.sdmp	Binary or memory string: U5!/etc/qemu-binfmt/sh4
Source: FBI.sh4.elf, 6253.1.00005587493ff000.0000558749462000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/sh4

Stealing of Sensitive Information

Yara detected Gafgyt

Source: Yara match	File source: FBI.sh4.elf, type: SAMPLE
Source: Yara match	File source: 6253.1.00007ff2ac400000.00007ff2ac416000.r-x.sdmp, type: MEMORY

Yara detected Mirai

Source: Yara match	File source: FBI.sh4.elf, type: SAMPLE
Source: Yara match	File source: 6253.1.00007ff2ac400000.00007ff2ac416000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: FBI.sh4.elf PID: 6253, type: MEMORYSTR

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

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: FBI.sh4.elf, type: SAMPLE
Source: Yara match	File source: 6253.1.00007ff2ac400000.00007ff2ac416000.r-x.sdmp, type: MEMORY

Yara detected Mirai

Source: Yara match	File source: FBI.sh4.elf, type: SAMPLE
Source: Yara match	File source: 6253.1.00007ff2ac400000.00007ff2ac416000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: FBI.sh4.elf PID: 6253, type: MEMORYSTR

Screenshots

No 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	ASN	ASN Name	Malicious
154.213.187.206	unknown	Seychelles	22769	DDOSING-BGP-NETWORKUS	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

ID:	1542895
Product:	CloudBasic
Start time:	19:38:41
Start date:	26.10.2024
Sample:	FBI.sh4.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:	b1f662abfdb22d1b0fe96da141637274
SHA1:	6e27cdbc13eae576f8806f80ef5a08de6dbd0dae
SHA256:	cc173070d6d0d5c1d1e425be668726042fda8d5ecc17eb2614bb1fe2d7ed761a
Filetype:	ELF Executable and Linkable format (generic) (4004/1) 100.00%

Linux Analysis Report
FBI.sh4.elf

Overview

General Information

Detection

Signatures

Classification

Malware Threat Intel
Provided by

Signatures

AV Detection

Networking

System Summary

Malware Analysis System Evasion

Stealing of Sensitive Information

Remote Access Functionality

Screenshots

Network Map

Contacted Public IPs

Linux Analysis Report FBI.sh4.elf

Overview

General Information

Detection

Signatures

Classification

Malware Threat Intel Provided by

Signatures

AV Detection

Networking

System Summary

Malware Analysis System Evasion

Stealing of Sensitive Information

Remote Access Functionality

Screenshots

Network Map

Contacted Public IPs

Linux Analysis Report
FBI.sh4.elf

Malware Threat Intel
Provided by