Linux Analysis Report
arm7.elf

Overview

General Information

Sample name: arm7.elf
Analysis ID: 1543110
MD5: b7ce707d02dad28e6d36606adaa06617
SHA1: 61bd27694a5af58873d444165d804740df507d55
SHA256: a71c6c142a6f960e9920348b72cf09f050540cb8ef99fdba3848258e2f465330
Tags: elfuser-abuse_ch
Infos:

Detection

Mirai
Score: 80
Range: 0 - 100
Whitelisted: false

Signatures

Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
Yara detected Mirai
Contains symbols with names commonly found in malware
Sample deletes itself
Detected TCP or UDP traffic on non-standard ports
Enumerates processes within the "proc" file system
Sample and/or dropped files contains symbols with suspicious names
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable
Sample listens on a socket
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: arm7.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: arm7.elf ReversingLabs: Detection: 36%
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.14:56506 -> 45.90.97.84:18129
Sample listens on a socket
Source: /tmp/arm7.elf (PID: 5642) Socket: 127.0.0.1:18129 Jump to behavior
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84
Source: unknown TCP traffic detected without corresponding DNS query: 45.90.97.84

System Summary
barindex
Contains symbols with names commonly found in malware
Source: ELF static info symbol of initial sample Name: attack.c
Source: ELF static info symbol of initial sample Name: attack_get_opt_int
Source: ELF static info symbol of initial sample Name: attack_get_opt_ip
Source: ELF static info symbol of initial sample Name: attack_gre.c
Source: ELF static info symbol of initial sample Name: attack_gre_eth
Source: ELF static info symbol of initial sample Name: attack_gre_ip
Source: ELF static info symbol of initial sample Name: attack_init
Source: ELF static info symbol of initial sample Name: attack_kill_all
Source: ELF static info symbol of initial sample Name: attack_ongoing
Source: ELF static info symbol of initial sample Name: attack_parse
Sample and/or dropped files contains symbols with suspicious names
Source: arm7.elf ELF static info symbol of initial sample: __gnu_unwind_execute
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: sys_monitor_cnrbusyboxadbddockerdBlink_Cloudsystemdhttpshsshdbashmsg_centerlte_mgrmain_mgrarm7arm5arm6mipsx86_32x86_64/tmp/var/mnt/root/boot/sbin/home/dev/media/opt/../(deleted)x86sh4softbot.armsoftbot.mpsl/dev/watchdog/dev/misc/watchdog/hello
Source: classification engine Classification label: mal80.troj.evad.linELF@0/0@0/0
Enumerates processes within the "proc" file system
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/88/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/88/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/88/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/88/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/88/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/88/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/111115/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/111/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/111/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/111/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/111/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/111/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/111/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/4444/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/999/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/8888/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/11/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/11/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/11/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/11/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/11/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/11/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/99/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/99/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/99/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/99/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/99/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/99/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/888/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/888/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/888/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/888/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/888/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/888/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/11111/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/111110/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/22/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/22/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/22/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/22/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/22/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/22/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/777/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/1111/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/5555/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/9999/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/33/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/22222/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/44/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/33333/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/2222/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/6666/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/55/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/66/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/333336/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/333/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/333/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/333/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/333/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/333/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/333/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/3333/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/7777/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/77/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/77/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/77/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/77/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/77/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/77/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/333330/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/222/stat Jump to behavior
Source: /tmp/arm7.elf (PID: 5646) File opened: /proc/55555/stat Jump to behavior

Hooking and other Techniques for Hiding and Protection
barindex
Sample deletes itself
Source: /tmp/arm7.elf (PID: 5642) File: /tmp/arm7.elf Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/arm7.elf (PID: 5642) Queries kernel information via 'uname': Jump to behavior
Source: arm7.elf, 5642.1.0000555fb55eb000.0000555fb573a000.rw-.sdmp Binary or memory string: _U!/etc/qemu-binfmt/arm
Source: arm7.elf, 5642.1.0000555fb55eb000.0000555fb573a000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: arm7.elf, 5642.1.00007ffed9974000.00007ffed9995000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: arm7.elf, 5642.1.00007ffed9974000.00007ffed9995000.rw-.sdmp Binary or memory string: jx86_64/usr/bin/qemu-arm/tmp/arm7.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/arm7.elf

Stealing of Sensitive Information
barindex
Yara detected Mirai
Source: Yara match File source: arm7.elf, type: SAMPLE

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: arm7.elf, type: SAMPLE
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
45.90.97.84
 unknown Germany
34549 MEER-ASmeerfarbigGmbHCoKGDE false