Linux Analysis Report
na.elf

Overview

General Information

Sample name: na.elf
Analysis ID: 1532166
MD5: cb296a2efcf53a306c9dca3c00286960
SHA1: 28149708a3f5fb4fbb9786b2cf363955caee250b
SHA256: fe86b4e35709b01f1c426789a9a46ef9cadf3f486e7e7beefe59587cc739291c
Tags: elfuser-abuse_ch
Infos:

Detection

Mirai
Score: 76
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 reads /proc/mounts (often used for finding a writable filesystem)
Enumerates processes within the "proc" file system
Reads system information from the proc file system
Sample contains strings that are user agent strings indicative of HTTP manipulation
Sample has stripped symbol table
Sample listens on a socket
Sample tries to kill a process (SIGKILL)
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: 26%
Sample listens on a socket
Source: /tmp/na.elf (PID: 5477) Socket: 127.0.0.1:33337 Jump to behavior

System Summary
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Malicious sample detected (through community Yara rule)
Source: na.elf, type: SAMPLE Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5673.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5671.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5477.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5540.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Sample tries to kill a process (SIGKILL)
Source: /tmp/na.elf (PID: 5480) SIGKILL sent: pid: 1691, result: successful Jump to behavior
Source: /tmp/na.elf (PID: 5480) SIGKILL sent: pid: 1866, result: successful Jump to behavior
Source: /tmp/na.elf (PID: 5480) SIGKILL sent: pid: 5597, result: successful Jump to behavior
Source: /tmp/na.elf (PID: 5480) SIGKILL sent: pid: 5600, result: successful Jump to behavior
Source: /tmp/na.elf (PID: 5673) SIGKILL sent: pid: 5671, result: successful Jump to behavior
Yara signature match
Source: na.elf, type: SAMPLE Matched rule: MAL_ELF_LNX_Mirai_Oct10_2 date = 2018-10-27, hash1 = fa0018e75f503f9748a5de0d14d4358db234f65e28c31c8d5878cc58807081c9, author = Florian Roth, description = Detects ELF malware Mirai related, reference = Internal Research
Source: 5673.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY Matched rule: MAL_ELF_LNX_Mirai_Oct10_2 date = 2018-10-27, hash1 = fa0018e75f503f9748a5de0d14d4358db234f65e28c31c8d5878cc58807081c9, author = Florian Roth, description = Detects ELF malware Mirai related, reference = Internal Research
Source: 5671.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY Matched rule: MAL_ELF_LNX_Mirai_Oct10_2 date = 2018-10-27, hash1 = fa0018e75f503f9748a5de0d14d4358db234f65e28c31c8d5878cc58807081c9, author = Florian Roth, description = Detects ELF malware Mirai related, reference = Internal Research
Source: 5477.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY Matched rule: MAL_ELF_LNX_Mirai_Oct10_2 date = 2018-10-27, hash1 = fa0018e75f503f9748a5de0d14d4358db234f65e28c31c8d5878cc58807081c9, author = Florian Roth, description = Detects ELF malware Mirai related, reference = Internal Research
Source: 5540.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY Matched rule: MAL_ELF_LNX_Mirai_Oct10_2 date = 2018-10-27, hash1 = fa0018e75f503f9748a5de0d14d4358db234f65e28c31c8d5878cc58807081c9, author = Florian Roth, description = Detects ELF malware Mirai related, reference = Internal Research
Source: classification engine Classification label: mal76.troj.linELF@0/1@0/0

Persistence and Installation Behavior
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Sample reads /proc/mounts (often used for finding a writable filesystem)
Source: /tmp/na.elf (PID: 5477) File: /proc/5477/mounts Jump to behavior
Enumerates processes within the "proc" file system
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5540/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3122/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3117/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3114/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3631/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5655/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5656/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5657/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/914/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5539/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/917/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3134/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3375/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3132/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3095/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1745/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1866/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1588/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/884/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1982/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/765/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3246/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/767/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/800/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1906/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/802/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/803/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1748/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3420/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1482/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/490/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1480/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1755/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1875/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/2964/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3413/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1751/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1872/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/2961/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1475/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/778/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5313/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/936/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/816/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1879/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5573/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5574/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5575/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5454/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5576/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5455/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1891/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3310/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3153/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/780/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/660/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1921/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5607/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5608/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/783/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1765/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5609/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/2974/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1400/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1884/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3424/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/2972/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3147/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/2970/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1881/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3146/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3300/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5600/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1805/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1925/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1804/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5603/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5604/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5605/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3429/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5606/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5580/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5581/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5582/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5583/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5584/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5585/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5586/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5587/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3442/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3165/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3164/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3163/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3162/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/790/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3161/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/792/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5618/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/793/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/5619/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1930/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/795/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/3315/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5480) File opened: /proc/1411/cmdline Jump to behavior
Reads system information from the proc file system
Source: /tmp/na.elf (PID: 5540) Reads from proc file: /proc/stat Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/na.elf (PID: 5477) Queries kernel information via 'uname': Jump to behavior
Source: na.elf, 5477.1.0000560471340000.00005604713f0000.rw-.sdmp, na.elf, 5540.1.0000560471340000.00005604713f0000.rw-.sdmp, na.elf, 5671.1.0000560471340000.00005604713f0000.rw-.sdmp, na.elf, 5673.1.0000560471340000.00005604713f0000.rw-.sdmp Binary or memory string: !/etc/qemu-binfmt/ppc1/usr/libexec/gsd-print-notifications1/proc/109/exe
Source: na.elf, 5673.1.0000560471340000.00005604713f0000.rw-.sdmp Binary or memory string: /usr/bin/vmtoolsd
Source: na.elf, 5477.1.00007ffc67652000.00007ffc67673000.rw-.sdmp, na.elf, 5540.1.00007ffc67652000.00007ffc67673000.rw-.sdmp, na.elf, 5671.1.00007ffc67652000.00007ffc67673000.rw-.sdmp, na.elf, 5673.1.00007ffc67652000.00007ffc67673000.rw-.sdmp Binary or memory string: %.x86_64/usr/bin/qemu-ppc/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, 5477.1.0000560471340000.00005604713f0000.rw-.sdmp, na.elf, 5540.1.0000560471340000.00005604713f0000.rw-.sdmp, na.elf, 5671.1.0000560471340000.00005604713f0000.rw-.sdmp, na.elf, 5673.1.0000560471340000.00005604713f0000.rw-.sdmp Binary or memory string: /etc/qemu-binfmtP
Source: na.elf, 5477.1.0000560471340000.00005604713f0000.rw-.sdmp, na.elf, 5540.1.0000560471340000.00005604713f0000.rw-.sdmp, na.elf, 5671.1.0000560471340000.00005604713f0000.rw-.sdmp, na.elf, 5673.1.0000560471340000.00005604713f0000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/ppc
Source: na.elf, 5673.1.0000560471340000.00005604713f0000.rw-.sdmp Binary or memory string: !/proc/765/exe0!/proc/418/exe1/proc/1320/exe/ppc/ro10!/usr/bin/vmtoolsd!/proc/419/exe1/usr/libexec/gsd-printer
Source: na.elf, 5477.1.00007ffc67652000.00007ffc67673000.rw-.sdmp, na.elf, 5540.1.00007ffc67652000.00007ffc67673000.rw-.sdmp, na.elf, 5671.1.00007ffc67652000.00007ffc67673000.rw-.sdmp, na.elf, 5673.1.00007ffc67652000.00007ffc67673000.rw-.sdmp Binary or memory string: /usr/bin/qemu-ppc
Source: na.elf, 5477.1.0000560471340000.00005604713f0000.rw-.sdmp, na.elf, 5540.1.0000560471340000.00005604713f0000.rw-.sdmp, na.elf, 5671.1.0000560471340000.00005604713f0000.rw-.sdmp, na.elf, 5673.1.0000560471340000.00005604713f0000.rw-.sdmp Binary or memory string: /etc/qemu-binfmtP@/usr/libexec/gvfs-udisks2-volume-monitorQ@

Stealing of Sensitive Information
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Yara detected Mirai
Source: Yara match File source: na.elf, type: SAMPLE
Source: Yara match File source: 5673.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5671.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5477.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5540.1.00007f59dc001000.00007f59dc013000.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/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 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/52.0.2743.116 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/51.0.2704.103 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/52.0.2743.116 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/601.7.7 (KHTML, like Gecko) Version/9.1.2 Safari/601.7.7

Remote Access Functionality
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Yara detected Mirai
Source: Yara match File source: na.elf, type: SAMPLE
Source: Yara match File source: 5673.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5671.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5477.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5540.1.00007f59dc001000.00007f59dc013000.r-x.sdmp, type: MEMORY

No Screenshots

⊘No contacted IP infos