Linux Analysis Report
na.elf

Overview

General Information

Sample name: na.elf
Analysis ID: 1544056
MD5: 8ec928a5e02d8af1d373e34b185cc331
SHA1: 404e9caac5aea11a9d338d12f29bef72d640b063
SHA256: 2b3e64c2cfdd2bce87362e9fed7b8d7074d1e4c08abeb750ea63570d48d73b7d
Tags: elfuser-abuse_ch
Infos:

Detection

Score: 72
Range: 0 - 100
Whitelisted: false

Signatures

Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Machine Learning detection for sample
Sample is packed with UPX
Detected TCP or UDP traffic on non-standard ports
ELF contains segments with high entropy indicating compressed/encrypted content
Executes commands using a shell command-line interpreter
Executes the "rm" command used to delete files or directories
Reads CPU information from /proc indicative of miner or evasive malware
Reads CPU information from /sys indicative of miner or evasive malware
Reads system information from the proc file system
Reads the 'hosts' file potentially containing internal network hosts
Sample contains only a LOAD segment without any section mappings
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Uses the "uname" system call to query kernel version information (possible evasion)
Yara signature match

Classification

AV Detection
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Multi AV Scanner detection for submitted file
Source: na.elf ReversingLabs: Detection: 50%
Machine Learning detection for sample
Source: na.elf Joe Sandbox ML: detected
Reads CPU information from /proc indicative of miner or evasive malware
Source: /tmp/na.elf (PID: 6256) Reads CPU info from proc file: /proc/cpuinfo Jump to behavior
Reads CPU information from /sys indicative of miner or evasive malware
Source: /tmp/na.elf (PID: 6256) Reads CPU info from /sys: /sys/devices/system/cpu/online Jump to behavior

Networking
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Suricata IDS alerts for network traffic
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:58998 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59020 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59018 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59006 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59008 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59000 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59030 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59014 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019177 - Severity 1 - ET MALWARE Linux/AES.DDoS Sending Real/Fake CPU&BW Info : 192.168.2.23:59008 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59034 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59036 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:58994 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:58996 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019177 - Severity 1 - ET MALWARE Linux/AES.DDoS Sending Real/Fake CPU&BW Info : 192.168.2.23:59036 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:58992 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59004 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:58990 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59022 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59012 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59038 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59024 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59010 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59032 -> 116.205.177.132:10210
Source: Network traffic Suricata IDS: 2019172 - Severity 1 - ET MALWARE Linux.DDoS Checkin : 192.168.2.23:59026 -> 116.205.177.132:10210
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.23:58990 -> 116.205.177.132:10210
Reads the 'hosts' file potentially containing internal network hosts
Source: /tmp/na.elf (PID: 6256) Reads hosts file: /etc/hosts Jump to behavior
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Source: global traffic TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global traffic TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: global traffic TCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: unknown TCP traffic detected without corresponding DNS query: 116.205.177.132
Source: global traffic DNS traffic detected: DNS query: mhacker.cc
Source: na.elf String found in binary or memory: http://upx.sf.net
Source: na.elf, 6239.1.0000000000400000.00000000005ae000.r-x.sdmp String found in binary or memory: https://bugs.launchpad.net/ubuntu/
Source: unknown Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 42836 -> 443

System Summary
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Malicious sample detected (through community Yara rule)
Source: 6239.1.0000000000400000.00000000005ae000.r-x.sdmp, type: MEMORY Matched rule: Detects malware from disclosed CN malware set Author: Florian Roth
Sample contains only a LOAD segment without any section mappings
Source: LOAD without section mappings Program segment: 0x400000
Yara signature match
Source: 6239.1.0000000000400000.00000000005ae000.r-x.sdmp, type: MEMORY Matched rule: CN_disclosed_20180208_lsls date = 2018-02-08, hash1 = 94c6a92984df9ed255f4c644261b01c4e255acbe32ddfd0debe38b558f29a6c9, author = Florian Roth, description = Detects malware from disclosed CN malware set, reference = https://twitter.com/cyberintproject/status/961714165550342146, license = https://creativecommons.org/licenses/by-nc/4.0/
Source: classification engine Classification label: mal72.evad.linELF@0/6@3/0

Data Obfuscation
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Sample is packed with UPX
Source: initial sample String containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sample String containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sample String containing UPX found: $Id: UPX 3.91 Copyright (C) 1996-2013 the UPX Team. All Rights Reserved. $
Executes commands using a shell command-line interpreter
Source: /tmp/na.elf (PID: 6240) Shell command executed: sh -c "sed -i -e '/exit/d' /etc/rc.local>nul 2>nul" Jump to behavior
Source: /tmp/na.elf (PID: 6242) Shell command executed: sh -c "sed -i -e '/^\r\n|\r|\n$/d' /etc/rc.local>nul 2>nul" Jump to behavior
Source: /tmp/na.elf (PID: 6244) Shell command executed: sh -c "sed -i -e '/na.elf reboot/d' /etc/rc.local>nul 2>nul" Jump to behavior
Source: /tmp/na.elf (PID: 6246) Shell command executed: sh -c "sed -i -e '2 i/tmp/na.elf reboot' /etc/rc.local>nul 2>nul" Jump to behavior
Source: /tmp/na.elf (PID: 6248) Shell command executed: sh -c "sed -i -e '2 i/tmp/na.elf reboot start' /etc/rc.d/rc.local>nul 2>nul" Jump to behavior
Source: /tmp/na.elf (PID: 6250) Shell command executed: sh -c "sed -i -e '2 i/tmp/na.elf reboot start' /etc/init.d/boot.local>nul 2>nul" Jump to behavior
Source: /tmp/na.elf (PID: 6252) Shell command executed: sh -c "rm -rf nul" Jump to behavior
Source: /tmp/na.elf (PID: 6254) Shell command executed: sh -c "rm -rf nul 2" Jump to behavior
Executes the "rm" command used to delete files or directories
Source: /bin/sh (PID: 6253) Rm executable: /usr/bin/rm -> rm -rf nul Jump to behavior
Source: /bin/sh (PID: 6255) Rm executable: /usr/bin/rm -> rm -rf nul 2 Jump to behavior
Reads system information from the proc file system
Source: /tmp/na.elf (PID: 6256) Reads from proc file: /proc/cpuinfo Jump to behavior
Source: /tmp/na.elf (PID: 6256) Reads from proc file: /proc/stat Jump to behavior
Source: /bin/sh (PID: 6241) Sed executable: /usr/bin/sed -> sed -i -e /exit/d /etc/rc.local Jump to behavior
Source: /bin/sh (PID: 6243) Sed executable: /usr/bin/sed -> sed -i -e /^||$/d /etc/rc.local Jump to behavior
Source: /bin/sh (PID: 6245) Sed executable: /usr/bin/sed -> sed -i -e "/na.elf reboot/d" /etc/rc.local Jump to behavior
Source: /bin/sh (PID: 6247) Sed executable: /usr/bin/sed -> sed -i -e "2 i/tmp/na.elf reboot" /etc/rc.local Jump to behavior
Source: /bin/sh (PID: 6249) Sed executable: /usr/bin/sed -> sed -i -e "2 i/tmp/na.elf reboot start" /etc/rc.d/rc.local Jump to behavior
Source: /bin/sh (PID: 6251) Sed executable: /usr/bin/sed -> sed -i -e "2 i/tmp/na.elf reboot start" /etc/init.d/boot.local Jump to behavior
ELF contains segments with high entropy indicating compressed/encrypted content
Source: na.elf Submission file: segment LOAD with 7.9398 entropy (max. 8.0)
Reads CPU information from /proc indicative of miner or evasive malware
Source: /tmp/na.elf (PID: 6256) Reads CPU info from proc file: /proc/cpuinfo Jump to behavior
Reads CPU information from /sys indicative of miner or evasive malware
Source: /tmp/na.elf (PID: 6256) Reads CPU info from /sys: /sys/devices/system/cpu/online Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/na.elf (PID: 6239) Queries kernel information via 'uname': Jump to behavior
Source: /tmp/na.elf (PID: 6256) Queries kernel information via 'uname': Jump to behavior

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
109.202.202.202
 unknown Switzerland
13030 INIT7CH false
91.189.91.43
 unknown United Kingdom
41231 CANONICAL-ASGB false
91.189.91.42
 unknown United Kingdom
41231 CANONICAL-ASGB false
116.205.177.132
 unknown China
4766 KIXS-AS-KRKoreaTelecomKR true

Contacted Domains

Name IP Active
mhacker.cc unknown unknown