Linux Analysis Report
na.elf

Overview

General Information

Sample name: na.elf
Analysis ID: 1530537
MD5: 55b25b35d83491947b7da371e397a85d
SHA1: f98248e3fa53e78e51a7bb3d6d18b19c95b04d3a
SHA256: bd56e19f014f56f69662a5ad20d07b5adc7a61e2d4c6859eb7b97e36381dee0a
Tags: elfuser-abuse_ch
Infos:

Detection

Mirai
Score: 76
Range: 0 - 100
Whitelisted: false

Signatures

Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Yara detected Mirai
Sample is packed with UPX
Detected TCP or UDP traffic on non-standard ports
ELF contains segments with high entropy indicating compressed/encrypted content
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

barindex
Source: na.elf ReversingLabs: Detection: 71%
Source: na.elf Virustotal: Detection: 47% Perma Link
Source: global traffic TCP traffic: 192.168.2.13:42010 -> 45.139.104.161:1312
Source: global traffic TCP traffic: 192.168.2.13:48202 -> 185.125.190.26:443
Source: unknown TCP traffic detected without corresponding DNS query: 45.139.104.161
Source: unknown TCP traffic detected without corresponding DNS query: 45.139.104.161
Source: unknown TCP traffic detected without corresponding DNS query: 241.74.63.214
Source: unknown TCP traffic detected without corresponding DNS query: 61.115.100.214
Source: unknown TCP traffic detected without corresponding DNS query: 162.174.150.21
Source: unknown TCP traffic detected without corresponding DNS query: 65.93.216.247
Source: unknown TCP traffic detected without corresponding DNS query: 99.225.90.235
Source: unknown TCP traffic detected without corresponding DNS query: 241.50.106.81
Source: unknown TCP traffic detected without corresponding DNS query: 36.159.151.170
Source: unknown TCP traffic detected without corresponding DNS query: 164.89.245.34
Source: unknown TCP traffic detected without corresponding DNS query: 194.117.224.124
Source: unknown TCP traffic detected without corresponding DNS query: 183.144.243.248
Source: unknown TCP traffic detected without corresponding DNS query: 169.51.179.242
Source: unknown TCP traffic detected without corresponding DNS query: 37.11.170.144
Source: unknown TCP traffic detected without corresponding DNS query: 68.172.226.213
Source: unknown TCP traffic detected without corresponding DNS query: 83.142.175.129
Source: unknown TCP traffic detected without corresponding DNS query: 165.172.84.236
Source: unknown TCP traffic detected without corresponding DNS query: 145.218.94.178
Source: unknown TCP traffic detected without corresponding DNS query: 65.148.6.105
Source: unknown TCP traffic detected without corresponding DNS query: 149.157.37.125
Source: unknown TCP traffic detected without corresponding DNS query: 103.209.3.16
Source: unknown TCP traffic detected without corresponding DNS query: 154.72.61.5
Source: unknown TCP traffic detected without corresponding DNS query: 5.91.247.11
Source: unknown TCP traffic detected without corresponding DNS query: 23.65.74.110
Source: unknown TCP traffic detected without corresponding DNS query: 159.3.234.152
Source: unknown TCP traffic detected without corresponding DNS query: 41.38.21.125
Source: unknown TCP traffic detected without corresponding DNS query: 5.158.205.38
Source: unknown TCP traffic detected without corresponding DNS query: 105.150.209.188
Source: unknown TCP traffic detected without corresponding DNS query: 12.242.84.66
Source: unknown TCP traffic detected without corresponding DNS query: 241.151.180.9
Source: unknown TCP traffic detected without corresponding DNS query: 187.187.125.20
Source: unknown TCP traffic detected without corresponding DNS query: 23.127.149.148
Source: unknown TCP traffic detected without corresponding DNS query: 4.128.142.100
Source: unknown TCP traffic detected without corresponding DNS query: 118.244.25.132
Source: unknown TCP traffic detected without corresponding DNS query: 218.211.59.209
Source: unknown TCP traffic detected without corresponding DNS query: 146.201.80.163
Source: unknown TCP traffic detected without corresponding DNS query: 43.204.30.76
Source: unknown TCP traffic detected without corresponding DNS query: 243.57.81.164
Source: unknown TCP traffic detected without corresponding DNS query: 192.48.244.85
Source: unknown TCP traffic detected without corresponding DNS query: 172.166.74.180
Source: unknown TCP traffic detected without corresponding DNS query: 105.240.106.37
Source: unknown TCP traffic detected without corresponding DNS query: 171.152.216.244
Source: unknown TCP traffic detected without corresponding DNS query: 142.205.188.112
Source: unknown TCP traffic detected without corresponding DNS query: 253.12.167.131
Source: unknown TCP traffic detected without corresponding DNS query: 174.2.205.117
Source: unknown TCP traffic detected without corresponding DNS query: 135.242.61.121
Source: unknown TCP traffic detected without corresponding DNS query: 100.26.141.73
Source: unknown TCP traffic detected without corresponding DNS query: 222.139.131.28
Source: unknown TCP traffic detected without corresponding DNS query: 207.151.253.228
Source: unknown TCP traffic detected without corresponding DNS query: 172.97.142.55
Source: na.elf String found in binary or memory: http://upx.sf.net
Source: unknown Network traffic detected: HTTP traffic on port 48202 -> 443

System Summary

barindex
Source: 5449.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5443.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5441.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5466.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5439.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5456.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5477.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5470.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: LOAD without section mappings Program segment: 0x8000
Source: 5449.1.00007fbb08017000.00007fbb08028000.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: 5443.1.00007fbb08017000.00007fbb08028000.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: 5441.1.00007fbb08017000.00007fbb08028000.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: 5466.1.00007fbb08017000.00007fbb08028000.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: 5439.1.00007fbb08017000.00007fbb08028000.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: 5456.1.00007fbb08017000.00007fbb08028000.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: 5477.1.00007fbb08017000.00007fbb08028000.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: 5470.1.00007fbb08017000.00007fbb08028000.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.evad.linELF@0/0@0/0

Data Obfuscation

barindex
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 3.94 Copyright (C) 1996-2017 the UPX Team. All Rights Reserved. $
Source: na.elf Submission file: segment LOAD with 7.9448 entropy (max. 8.0)
Source: /tmp/na.elf (PID: 5439) Queries kernel information via 'uname': Jump to behavior
Source: na.elf, 5439.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5441.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5456.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5477.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5466.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5443.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5470.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5449.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp Binary or memory string: bx86_64/usr/bin/qemu-arm/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, 5439.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5441.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5456.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5477.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5466.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5443.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5470.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5449.1.00005630833e4000.00005630835d2000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: na.elf, 5439.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5441.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5456.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5477.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5466.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5443.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5470.1.00005630833e4000.00005630835d2000.rw-.sdmp, na.elf, 5449.1.00005630833e4000.00005630835d2000.rw-.sdmp Binary or memory string: 0V!/etc/qemu-binfmt/arm
Source: na.elf, 5439.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5441.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5456.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5477.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5466.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5443.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5470.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp, na.elf, 5449.1.00007ffe79fda000.00007ffe79ffb000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm

Stealing of Sensitive Information

barindex
Source: Yara match File source: 5449.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5443.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5441.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5466.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5439.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5456.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5477.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5470.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: na.elf PID: 5439, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5441, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5443, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5449, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5456, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5466, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5470, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5477, type: MEMORYSTR

Remote Access Functionality

barindex
Source: Yara match File source: 5449.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5443.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5441.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5466.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5439.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5456.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5477.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5470.1.00007fbb08017000.00007fbb08028000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: na.elf PID: 5439, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5441, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5443, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5449, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5456, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5466, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5470, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: na.elf PID: 5477, type: MEMORYSTR
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs