Linux Analysis Report
D88pI7Bo4B.elf

Overview

General Information

Sample name: D88pI7Bo4B.elf
renamed because original name is a hash value
Original sample name: 4ec4509374209942b945832b64317e9f.elf
Analysis ID: 1417434
MD5: 4ec4509374209942b945832b64317e9f
SHA1: df26584fe5adb927c13da7bcc1aff7ed5c060a51
SHA256: 7729b0a237a38cf3ea7fed6f1ee11aaab753269496a34a97a2c66b80b0c50e0c
Tags: 32armelfgafgyt
Infos:

Detection

Gafgyt, Mirai
Score: 96
Range: 0 - 100
Whitelisted: false

Signatures

Antivirus / Scanner detection for submitted sample
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Yara detected Gafgyt
Yara detected Mirai
Connects to many ports of the same IP (likely port scanning)
Opens /proc/net/* files useful for finding connected devices and routers
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
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
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Antivirus / Scanner detection for submitted sample
Source: D88pI7Bo4B.elf Avira: detected
Found malware configuration
Source: D88pI7Bo4B.elf Malware Configuration Extractor: Gafgyt {"C2 url": "193.35.18.56:65490"}
Multi AV Scanner detection for submitted file
Source: D88pI7Bo4B.elf ReversingLabs: Detection: 50%
Source: D88pI7Bo4B.elf Virustotal: Detection: 54% Perma Link

Spreading
barindex
Opens /proc/net/* files useful for finding connected devices and routers
Source: /tmp/D88pI7Bo4B.elf (PID: 5523) Opens: /proc/net/route Jump to behavior

Networking
barindex
Connects to many ports of the same IP (likely port scanning)
Source: global traffic TCP traffic: 193.35.18.56 ports 0,4,5,6,9,65490
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.15:49560 -> 193.35.18.56:65490
Source: unknown TCP traffic detected without corresponding DNS query: 193.35.18.56
Source: unknown TCP traffic detected without corresponding DNS query: 193.35.18.56
Source: unknown TCP traffic detected without corresponding DNS query: 193.35.18.56
Source: unknown TCP traffic detected without corresponding DNS query: 193.35.18.56
Source: unknown TCP traffic detected without corresponding DNS query: 193.35.18.56
Source: unknown TCP traffic detected without corresponding DNS query: 193.35.18.56
Source: unknown TCP traffic detected without corresponding DNS query: 193.35.18.56
Source: unknown TCP traffic detected without corresponding DNS query: 193.35.18.56
Source: unknown TCP traffic detected without corresponding DNS query: 193.35.18.56
Source: unknown TCP traffic detected without corresponding DNS query: 193.35.18.56
Source: unknown TCP traffic detected without corresponding DNS query: 193.35.18.56
Source: unknown UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown DNS traffic detected: queries for: daisy.ubuntu.com

System Summary
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Malicious sample detected (through community Yara rule)
Source: D88pI7Bo4B.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5523.1.00007fe138017000.00007fe13802d000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5525.1.00007fe138017000.00007fe13802d000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: D88pI7Bo4B.elf PID: 5523, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: D88pI7Bo4B.elf PID: 5525, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable
Source: Initial sample String containing 'busybox' found: /bin/busybox
Source: Initial sample String containing 'busybox' found: LZRDskidx86?-_-=1IObeENwjmipsvlxx.arm6vlxx.armvlxx.x86_64vlxx.mipsvlxx.arm7vlxx.m68kvlxx.mpslvlxx.ppcvlxx.sh4vlxx.x86vlxx.arm5sys64.m68ksys64.x86sys64.x86_64sys64.arm6sys64.mpslsys64.spcsys64.ar64besys64.sh4sys64.aarch64sys64.i686sys64.arm7sys64.armsys64.mipssys64.arm5IObeENwjmpslIObeENwjarmIObeENwjarm4IObeENwjarm5IObeENwjarm6IObeENwjarm7.x86.x86_64.arm.arm5.arm6.arm7.mips.mipsel.sh4.ppcdvrhelperhuhudvrsupportmiraiArceusla.bot.0xc2sfuckjewishpeople.mipsfuckjewishpeoplessh.mipsHadesboatnetloligangSakuraDemonbladedemonhohohakaisoramessiahmipsmipselsh4superhx86armv7armv6i686campnig.x86nigpercx86dosbotBOTDOS@DOSBOTDOSBOTperci5perci6percmipspercmpslpercsparkpercm68kpercppcpercsh4percshpercoarmperceightysixpercmips&lperc.shCronx86anacronCronarmCronmipsCronmpslCronspcCronm68kCronppcCronsh4Cronshcnrpox(deleted)killpstreekillallbgpmaplsofarmUser-Agent:/dev/nullSTD/etc/rc.conf/proc/net/tcp/proc/self/exeUPX!/proc/net/route/etc/rc.d/rc.local/bin/shtophtopgrepbashcatnanopssshtelnetdpcbashdvarsshdcurltftpdtelnetvar/Challen
Yara signature match
Source: D88pI7Bo4B.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: 5523.1.00007fe138017000.00007fe13802d000.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: 5525.1.00007fe138017000.00007fe13802d000.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: D88pI7Bo4B.elf PID: 5523, 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: D88pI7Bo4B.elf PID: 5525, 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: mal96.spre.troj.linELF@0/0@2/0
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/D88pI7Bo4B.elf (PID: 5523) Queries kernel information via 'uname': Jump to behavior
Source: D88pI7Bo4B.elf, 5523.1.00007ffdae087000.00007ffdae0a8000.rw-.sdmp, D88pI7Bo4B.elf, 5525.1.00007ffdae087000.00007ffdae0a8000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/D88pI7Bo4B.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/D88pI7Bo4B.elf
Source: D88pI7Bo4B.elf, 5523.1.0000556f6a2ce000.0000556f6a3fc000.rw-.sdmp, D88pI7Bo4B.elf, 5525.1.0000556f6a2ce000.0000556f6a3fc000.rw-.sdmp Binary or memory string: S.joUPU.joUPR.joU!/etc/qemu-binfmt/arm
Source: D88pI7Bo4B.elf, 5523.1.0000556f6a2ce000.0000556f6a3fc000.rw-.sdmp, D88pI7Bo4B.elf, 5525.1.0000556f6a2ce000.0000556f6a3fc000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: D88pI7Bo4B.elf, 5523.1.00007ffdae087000.00007ffdae0a8000.rw-.sdmp, D88pI7Bo4B.elf, 5525.1.00007ffdae087000.00007ffdae0a8000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm

Stealing of Sensitive Information
barindex
Yara detected Gafgyt
Source: Yara match File source: D88pI7Bo4B.elf, type: SAMPLE
Yara detected Mirai
Source: Yara match File source: D88pI7Bo4B.elf, type: SAMPLE
Source: Yara match File source: 5523.1.00007fe138017000.00007fe13802d000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5525.1.00007fe138017000.00007fe13802d000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: D88pI7Bo4B.elf PID: 5523, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: D88pI7Bo4B.elf PID: 5525, type: MEMORYSTR
Sample contains strings that are user agent strings indicative of HTTP manipulation
Source: Initial sample User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.1.2 Safari/605.1.1 31.5
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.3 17.34
Source: Initial sample User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.2 Safari/605.1.1 11.27
Source: Initial sample User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Safari/605.1.1 9.83
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.3 9.25
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120. 6.94
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/117. 2.31
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36 Edg/119.0.0. 2.31
Source: Initial sample User agent string found: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.3 1.16
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115. 1.16
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.3 1.16
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Herring/90.1.9310.1 1.16
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36 OPR/105.0.0. 1.16
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36 Edg/117.0.2045.4 1.16
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.3 1.16
Source: Initial sample User agent string found: Mozilla/5.0 (iPhone; CPU iPhone OS 17_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/119.0.6045.169 Mobile/15E148 Safari/604.
Source: Initial sample User agent string found: Mozilla/5.0 (iPhone; CPU iPhone OS 17_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.1.2 Mobile/15E148 Safari/604.

Remote Access Functionality
barindex
Yara detected Gafgyt
Source: Yara match File source: D88pI7Bo4B.elf, type: SAMPLE
Yara detected Mirai
Source: Yara match File source: D88pI7Bo4B.elf, type: SAMPLE
Source: Yara match File source: 5523.1.00007fe138017000.00007fe13802d000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5525.1.00007fe138017000.00007fe13802d000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: D88pI7Bo4B.elf PID: 5523, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: D88pI7Bo4B.elf PID: 5525, 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
193.35.18.56
 unknown Germany
41865 BIALLNET-ASPL true

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.25 true

Contacted URLs

Name Malicious Antivirus Detection Reputation
193.35.18.56:65490 true
    		unknown