Linux Analysis Report
na.elf

Overview

General Information

Sample name: na.elf
Analysis ID: 1527075
MD5: 2d2e128a65e45a6e29cd36e6c3b6589d
SHA1: 856c2393b1ec8c930b432685b3b25fd64ff10f44
SHA256: 43770dee17d680d47f94a331a4e5cb5514db76797ccd8851c137c7d86fb0a9c6
Tags: elfuser-abuse_ch
Infos:

Detection

Mirai
Score: 64
Range: 0 - 100
Whitelisted: false

Signatures

Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
Yara detected Mirai
Enumerates processes within the "proc" file system
Sample has stripped symbol table
Sample listens on a socket
Sample tries to kill a process (SIGKILL)
Sleeps for long times indicative of sandbox evasion
Uses the "uname" system call to query kernel version information (possible evasion)

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
barindex
Antivirus / Scanner detection for submitted sample
Source: na.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: na.elf ReversingLabs: Detection: 36%
Sample listens on a socket
Source: /tmp/na.elf (PID: 5552) Socket: 127.0.0.1:1172 Jump to behavior
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: 5756) SIGKILL sent: pid: 5754, result: successful Jump to behavior
Source: /tmp/na.elf (PID: 5779) SIGKILL sent: pid: 5777, result: successful Jump to behavior
Source: classification engine Classification label: mal64.troj.linELF@0/0@0/0
Enumerates processes within the "proc" file system
Source: /tmp/na.elf (PID: 5555) File opened: /proc/5389/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5555) File opened: /proc/5601/status Jump to behavior
Source: /tmp/na.elf (PID: 5555) File opened: /proc/5603/status Jump to behavior
Source: /tmp/na.elf (PID: 5555) File opened: /proc/5604/status Jump to behavior
Source: /tmp/na.elf (PID: 5555) File opened: /proc/5615/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5680/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5681/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5682/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5389/cmdline Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5717/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5718/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5719/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5676/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5677/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5710/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5678/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5711/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5712/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5713/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5714/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5715/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5716/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5675/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5706/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5707/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5708/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5709/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5720/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5702/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5703/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5704/status Jump to behavior
Source: /tmp/na.elf (PID: 5616) File opened: /proc/5705/status Jump to behavior
Sleeps for long times indicative of sandbox evasion
Source: /tmp/na.elf (PID: 5756) Sleeps longer then 60s: 60.0s Jump to behavior
Source: /tmp/na.elf (PID: 5901) Sleeps longer then 60s: 60.0s Jump to behavior
Source: /tmp/na.elf (PID: 5779) Sleeps longer then 60s: 60.0s Jump to behavior
Source: /tmp/na.elf (PID: 5924) Sleeps longer then 60s: 60.0s Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/na.elf (PID: 5552) Queries kernel information via 'uname': Jump to behavior
Source: na.elf, 5552.1.000055dec980f000.000055dec98d9000.rw-.sdmp, na.elf, 5554.1.000055dec980f000.000055dec98d9000.rw-.sdmp, na.elf, 5754.1.000055dec980f000.000055dec98d9000.rw-.sdmp, na.elf, 5756.1.000055dec980f000.000055dec98d9000.rw-.sdmp, na.elf, 5555.1.000055dec980f000.000055dec98d9000.rw-.sdmp, na.elf, 5777.1.000055dec980f000.000055dec98d9000.rw-.sdmp, na.elf, 5779.1.000055dec980f000.000055dec98d9000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/mipsel
Source: na.elf, 5552.1.000055dec980f000.000055dec98d9000.rw-.sdmp, na.elf, 5554.1.000055dec980f000.000055dec98d9000.rw-.sdmp, na.elf, 5754.1.000055dec980f000.000055dec98d9000.rw-.sdmp, na.elf, 5756.1.000055dec980f000.000055dec98d9000.rw-.sdmp, na.elf, 5555.1.000055dec980f000.000055dec98d9000.rw-.sdmp, na.elf, 5777.1.000055dec980f000.000055dec98d9000.rw-.sdmp, na.elf, 5779.1.000055dec980f000.000055dec98d9000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/mipsel
Source: na.elf, 5552.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp, na.elf, 5554.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp, na.elf, 5754.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp, na.elf, 5756.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp, na.elf, 5555.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp, na.elf, 5777.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp, na.elf, 5779.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp Binary or memory string: /usr/bin/qemu-mipsel
Source: na.elf, 5552.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp, na.elf, 5554.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp, na.elf, 5754.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp, na.elf, 5756.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp, na.elf, 5555.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp, na.elf, 5777.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp, na.elf, 5779.1.00007ffe4d407000.00007ffe4d428000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-mipsel/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

Stealing of Sensitive Information
barindex
Yara detected Mirai
Source: Yara match File source: na.elf, type: SAMPLE
Source: Yara match File source: 5777.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5554.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5756.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5779.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5552.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5555.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5754.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: na.elf, type: SAMPLE
Source: Yara match File source: 5777.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5554.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5756.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5779.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5552.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5555.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5754.1.00007fcd44400000.00007fcd4441a000.r-x.sdmp, type: MEMORY
windows-stand
⊘No contacted IP infos