Linux Analysis Report
mJ4CsuZhyr.elf

Overview

General Information

Sample name: mJ4CsuZhyr.elf
renamed because original name is a hash value
Original sample name: 1d2f0ac632691ad9306d80d4ca255a68.elf
Analysis ID: 1430428
MD5: 1d2f0ac632691ad9306d80d4ca255a68
SHA1: e2d4891dcb940486b836134c2db0ecad2b5cd234
SHA256: a93baabdfac2c9c92059075ff04c0d74da65c6f00b84f5e880792ecf9b71aac8
Tags: 32armelfmirai
Infos:

Detection

Mirai
Score: 76
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
Queries the IP of a very long domain name
Sample deletes itself
Detected TCP or UDP traffic on non-standard ports
Enumerates processes within the "proc" file system
Found strings indicative of a multi-platform dropper
Sample and/or dropped files contains symbols with suspicious names
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: mJ4CsuZhyr.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: mJ4CsuZhyr.elf ReversingLabs: Detection: 47%
Found strings indicative of a multi-platform dropper
Source: mJ4CsuZhyr.elf String: EOF/proc//proc/%s/cmdlinewgetcurlftpechokillbashrebootshutdownhaltpoweroff[locker] killed process: %s ;; pid: %d

Networking
barindex
Queries the IP of a very long domain name
Source: unknown DNS traffic detected: query: cnc.voidnet.click.'f!p66a/PV!E(*:5we))'fpNNPV!a/E@7
Source: unknown DNS traffic detected: query: cnc.voidnet.click.'f66a/PV!E(:+5sp-)'f}NNPV!a/E@7
Source: unknown DNS traffic detected: query: cnc.voidnet.click.'fm66a/PV!E(G7j6I5o)'f"nNNPV!a/E@7
Source: unknown DNS traffic detected: query: cnc.voidnet.click.'f66a/PV!E(9O5?)'fZNNPV!a/E@8.@@/.5,.cncvoidnetclickn'f
Source: unknown DNS traffic detected: query: cnc.voidnet.click.'f66a/PV!E($:}5)'fJJPV!a/E<.@@(^OM^%K|+'f,JJa/PV!E<@6^OM^.,%n9|+'f=-BBPV!a/E4m@@(^OM^%`,
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.13:51550 -> 94.156.79.77:33966
Source: unknown DNS traffic detected: queries for: cnc.voidnet.click

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_parse
Source: ELF static info symbol of initial sample Name: attack_start
Source: ELF static info symbol of initial sample Name: attack_std
Sample and/or dropped files contains symbols with suspicious names
Source: mJ4CsuZhyr.elf ELF static info symbol of initial sample: __gnu_unwind_execute
Source: classification engine Classification label: mal76.troj.evad.linELF@0/1@6/0
Enumerates processes within the "proc" file system
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/11/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/11/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/11/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/11/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/11/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/22/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/22/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/22/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/22/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/22/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/55/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/55/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/66/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/88/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/88/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/88/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/88/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/99/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/99/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/99/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/99/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/33/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/33/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/111/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/111/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/111/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/111/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/222/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/222/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/222/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/222/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/333/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/333/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/777/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/777/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/888/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/888/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/11111/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/11111/stat Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/999/cmdline Jump to behavior
Source: /tmp/mJ4CsuZhyr.elf (PID: 5435) File opened: /proc/999/stat Jump to behavior

Hooking and other Techniques for Hiding and Protection
barindex
Sample deletes itself
Source: /tmp/mJ4CsuZhyr.elf (PID: 5433) File: /tmp/mJ4CsuZhyr.elf Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/mJ4CsuZhyr.elf (PID: 5431) Queries kernel information via 'uname': Jump to behavior
Source: mJ4CsuZhyr.elf, 5431.1.00007ffe3904e000.00007ffe3906f000.rw-.sdmp Binary or memory string: /tmp/qemu-open.eDFJ3P
Source: mJ4CsuZhyr.elf, 5431.1.00007ffe3904e000.00007ffe3906f000.rw-.sdmp Binary or memory string: V/tmp/qemu-open.eDFJ3P:uW
Source: mJ4CsuZhyr.elf, 5431.1.0000561ccd5e3000.0000561ccd734000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: mJ4CsuZhyr.elf, 5431.1.00007ffe3904e000.00007ffe3906f000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: mJ4CsuZhyr.elf, 5431.1.0000561ccd5e3000.0000561ccd734000.rw-.sdmp Binary or memory string: V!/etc/qemu-binfmt/arm
Source: mJ4CsuZhyr.elf, 5431.1.00007ffe3904e000.00007ffe3906f000.rw-.sdmp Binary or memory string: 5x86_64/usr/bin/qemu-arm/tmp/mJ4CsuZhyr.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/mJ4CsuZhyr.elf

Stealing of Sensitive Information
barindex
Yara detected Mirai
Source: Yara match File source: mJ4CsuZhyr.elf, type: SAMPLE

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: mJ4CsuZhyr.elf, type: SAMPLE

No Screenshots

  • 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
94.156.79.77
 cnc.voidnet.click Bulgaria
43561 NET1-ASBG true

Contacted Domains

Name IP Active
cnc.voidnet.click 94.156.79.77 true
cnc.voidnet.click.'f!p66a/PV!E(*:5we))'fpNNPV!a/E@7 unknown unknown
cnc.voidnet.click.'f66a/PV!E(9O5?)'fZNNPV!a/E@8.@@/.5,.cncvoidnetclickn'f unknown unknown
cnc.voidnet.click.'f66a/PV!E(:+5sp-)'f}NNPV!a/E@7 unknown unknown
cnc.voidnet.click.'fm66a/PV!E(G7j6I5o)'f"nNNPV!a/E@7 unknown unknown
cnc.voidnet.click.'f66a/PV!E($:}5)'fJJPV!a/E<.@@(^OM^%K|+'f,JJa/PV!E<@6^OM^.,%n9|+'f=-BBPV!a/E4m@@(^OM^%`, unknown unknown