Linux Analysis Report
na.elf

Overview

General Information

Sample name: na.elf
Analysis ID: 1532514
MD5: ec83f911eebf2d2118bb19520d15da62
SHA1: 534bd3c76a8167a14ed755972c90627c1b0b3aca
SHA256: 586e95902ff3a186171545993624bd9f45ce3762297f03c2a0d5cbf56c92512d
Tags: elfuser-abuse_ch
Infos:

Detection

Score: 56
Range: 0 - 100
Whitelisted: false

Signatures

Antivirus / Scanner detection for submitted sample
Connects to many ports of the same IP (likely port scanning)
Sends malformed DNS queries
Detected TCP or UDP traffic on non-standard ports
Found strings indicative of a multi-platform dropper
Sample has stripped symbol table
Sample listens on a socket
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)

Classification

AV Detection
barindex
Antivirus / Scanner detection for submitted sample
Source: na.elf Avira: detected
Found strings indicative of a multi-platform dropper
Source: na.elf String: ash|login|wget|curl|tftp|ntpdate
Source: na.elf String: /proc//exe|ash|login|wget|curl|tftp|ntpdate/fdsocket|proc/usr/bin/usr/sbin/system/mnt/mtd/app/org/z/zbin/home/app/dvr/bin/duksan/userfs/mnt/app/usr/etc/dvr/main/usr/local/var/bin/tmp/sqfs/z/bin/dvr/mnt/mtd/zconf/gm/bin/home/process/var/challenge/usr/lib/lib/systemd//usr/lib/systemd/system/system/bin//mnt//home/helper/home/davinci/usr/libexec//sbin//bin/

Networking
barindex
Connects to many ports of the same IP (likely port scanning)
Source: global traffic TCP traffic: 38.60.249.66 ports 54123,1,2,3,4,5
Sends malformed DNS queries
Source: global traffic DNS traffic detected: malformed DNS query: nineteen.libre. [malformed]
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.23:48544 -> 38.60.249.66:54123
Sample listens on a socket
Source: /tmp/na.elf (PID: 6264) Socket: 127.0.0.1:1234 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: 192.168.2.23:42516 -> 109.202.202.202:80
Source: global traffic TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown TCP traffic detected without corresponding DNS query: 38.60.249.66
Source: unknown TCP traffic detected without corresponding DNS query: 38.60.249.66
Source: unknown TCP traffic detected without corresponding DNS query: 38.60.249.66
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown TCP traffic detected without corresponding DNS query: 38.60.249.66
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown TCP traffic detected without corresponding DNS query: 38.60.249.66
Source: unknown TCP traffic detected without corresponding DNS query: 38.60.249.66
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 38.60.249.66
Source: unknown TCP traffic detected without corresponding DNS query: 38.60.249.66
Source: unknown TCP traffic detected without corresponding DNS query: 38.60.249.66
Source: unknown TCP traffic detected without corresponding DNS query: 38.60.249.66
Source: unknown UDP traffic detected without corresponding DNS query: 63.231.92.27
Source: unknown UDP traffic detected without corresponding DNS query: 185.84.81.194
Source: unknown UDP traffic detected without corresponding DNS query: 116.203.104.203
Source: unknown UDP traffic detected without corresponding DNS query: 161.97.219.84
Source: unknown UDP traffic detected without corresponding DNS query: 185.84.81.194
Source: global traffic DNS traffic detected: DNS query: nineteen.libre. [malformed]
Source: unknown Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 42836 -> 443
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Source: classification engine Classification label: mal56.troj.linELF@0/0@1/0
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/na.elf (PID: 6264) Queries kernel information via 'uname': Jump to behavior
Source: na.elf, 6264.1.00007ffdcfd0f000.00007ffdcfd30000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-mips/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, 6264.1.000056131ca3e000.000056131cae6000.rw-.sdmp Binary or memory string: V!/etc/qemu-binfmt/mips
Source: na.elf, 6264.1.000056131ca3e000.000056131cae6000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/mips
Source: na.elf, 6264.1.00007ffdcfd0f000.00007ffdcfd30000.rw-.sdmp Binary or memory string: /usr/bin/qemu-mips

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
63.231.92.27
 unknown United States
209 CENTURYLINK-US-LEGACY-QWESTUS false
109.202.202.202
 unknown Switzerland
13030 INIT7CH false
185.84.81.194
 unknown Germany
8648 KAMP-DE false
91.189.91.43
 unknown United Kingdom
41231 CANONICAL-ASGB false
91.189.91.42
 unknown United Kingdom
41231 CANONICAL-ASGB false
161.97.219.84
 unknown United States
393552 COL-LPCUS false
38.60.249.66
 unknown United States
174 COGENT-174US true

Contacted Domains

Name IP Active
nineteen.libre. [malformed] unknown unknown