Linux Analysis Report
na.elf

Overview

General Information

Sample name: na.elf
Analysis ID: 1542878
MD5: 03dd4b61fd2eade88f500c73b3400aa0
SHA1: e20caa48018925b1612b21ba4c09ae2ec0991c99
SHA256: 5192e238fdfac87771724d17e67e7960c8a4cab04149496d3aa78bd858019d9a
Tags: elfuser-abuse_ch
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
Uses the "uname" system call to query kernel version information (possible evasion)
Yara signature match

Classification

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 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 https://malpedia.caad.fkie.fraunhofer.de/details/elf.mirai

AV Detection
barindex
Antivirus / Scanner detection for submitted sample
Source: na.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: na.elf ReversingLabs: Detection: 63%
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.14:39068 -> 154.213.187.206:1337
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: 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: global traffic DNS traffic detected: DNS query: daisy.ubuntu.com
Source: na.elf String found in binary or memory: http://fast.no/support/crawler.asp)
Source: na.elf String found in binary or memory: http://feedback.redkolibri.com/
Source: na.elf String found in binary or memory: http://www.baidu.com/search/spider.htm)
Source: na.elf String found in binary or memory: http://www.baidu.com/search/spider.html)
Source: na.elf String found in binary or memory: http://www.billybobbot.com/crawler/)

System Summary
barindex
Malicious sample detected (through community Yara rule)
Source: na.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: na.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: 5581.1.00007f8e68017000.00007f8e68030000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5581.1.00007f8e68017000.00007f8e68030000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: 5579.1.00007f8e68017000.00007f8e68030000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5579.1.00007f8e68017000.00007f8e68030000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: Process Memory Space: na.elf PID: 5579, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: na.elf PID: 5579, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: Process Memory Space: na.elf PID: 5581, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: na.elf PID: 5581, 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: na.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: na.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: 5581.1.00007f8e68017000.00007f8e68030000.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: 5581.1.00007f8e68017000.00007f8e68030000.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: 5579.1.00007f8e68017000.00007f8e68030000.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: 5579.1.00007f8e68017000.00007f8e68030000.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: na.elf PID: 5579, 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: na.elf PID: 5579, 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: Process Memory Space: na.elf PID: 5581, 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: na.elf PID: 5581, 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@2/0
Source: submitted sample Stderr: qemu: uncaught target signal 11 (Segmentation fault) - core dumped: exit code = 0
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/na.elf (PID: 5579) Queries kernel information via 'uname': Jump to behavior
Source: na.elf, 5579.1.00007ffc577aa000.00007ffc577cb000.rw-.sdmp, na.elf, 5581.1.00007ffc577aa000.00007ffc577cb000.rw-.sdmp Binary or memory string: {x86_64/usr/bin/qemu-arm/tmp/na.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/na.elf
Source: na.elf, 5579.1.000055eec1b1e000.000055eec1c4c000.rw-.sdmp, na.elf, 5581.1.000055eec1b1e000.000055eec1c4c000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: na.elf, 5579.1.000055eec1b1e000.000055eec1c4c000.rw-.sdmp, na.elf, 5581.1.000055eec1b1e000.000055eec1c4c000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: na.elf, 5579.1.00007ffc577aa000.00007ffc577cb000.rw-.sdmp, na.elf, 5581.1.00007ffc577aa000.00007ffc577cb000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: na.elf, 5581.1.00007ffc577aa000.00007ffc577cb000.rw-.sdmp Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Stealing of Sensitive Information
barindex
Yara detected Gafgyt
Source: Yara match File source: na.elf, type: SAMPLE
Source: Yara match File source: 5581.1.00007f8e68017000.00007f8e68030000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5579.1.00007f8e68017000.00007f8e68030000.r-x.sdmp, type: MEMORY
Yara detected Mirai
Source: Yara match File source: na.elf, type: SAMPLE
Source: Yara match File source: 5581.1.00007f8e68017000.00007f8e68030000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5579.1.00007f8e68017000.00007f8e68030000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: na.elf PID: 5579, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5581, 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
barindex
Yara detected Gafgyt
Source: Yara match File source: na.elf, type: SAMPLE
Source: Yara match File source: 5581.1.00007f8e68017000.00007f8e68030000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5579.1.00007f8e68017000.00007f8e68030000.r-x.sdmp, type: MEMORY
Yara detected Mirai
Source: Yara match File source: na.elf, type: SAMPLE
Source: Yara match File source: 5581.1.00007f8e68017000.00007f8e68030000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5579.1.00007f8e68017000.00007f8e68030000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: na.elf PID: 5579, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5581, type: MEMORYSTR
windows-stand
  • 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
154.213.187.206
 unknown Seychelles
22769 DDOSING-BGP-NETWORKUS false

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.25 true