Linux Analysis Report
na.elf

Overview

General Information

Sample name: na.elf
Analysis ID: 1532528
MD5: 735bf688030036437db33e97be057d81
SHA1: a488e305e653a4d99080a763c45a3862f6733adf
SHA256: 4c99637106bf1326e4a4ff40228bce7a01b9d78d3777c9d3a4cb4f2b993a9161
Tags: elfuser-abuse_ch
Infos:

Detection

Score: 56
Range: 0 - 100
Whitelisted: false

Signatures

Multi AV Scanner detection for submitted file
Connects to many ports of the same IP (likely port scanning)
Sends malformed DNS queries
Detected TCP or UDP traffic on non-standard ports
Executes the "rm" command used to delete files or directories
Found strings indicative of a multi-platform dropper
Sample has stripped symbol table
Sample listens on a socket
Sample tries to kill a process (SIGKILL)
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

AV Detection
barindex
Multi AV Scanner detection for submitted file
Source: na.elf ReversingLabs: Detection: 21%
Source: na.elf Virustotal: Detection: 20% Perma Link
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 46852,2,4,5,6,8
Sends malformed DNS queries
Source: global traffic DNS traffic detected: malformed DNS query: nineteen.libre. [malformed]
Source: global traffic DNS traffic detected: malformed DNS query: 2joints.libre. [malformed]
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.23:40150 -> 38.60.249.66:46852
Sample listens on a socket
Source: /tmp/na.elf (PID: 6260) Socket: 127.0.0.1:1234 Jump to behavior
Source: unknown TCP traffic detected without corresponding DNS query: 34.249.145.219
Source: unknown TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown UDP traffic detected without corresponding DNS query: 162.243.19.47
Source: unknown UDP traffic detected without corresponding DNS query: 54.36.111.116
Source: unknown UDP traffic detected without corresponding DNS query: 162.243.19.47
Source: unknown UDP traffic detected without corresponding DNS query: 63.231.92.27
Source: unknown UDP traffic detected without corresponding DNS query: 116.203.104.203
Source: global traffic DNS traffic detected: DNS query: nineteen.libre. [malformed]
Source: global traffic DNS traffic detected: DNS query: 2joints.libre. [malformed]
Source: global traffic DNS traffic detected: DNS query: eighteen.pirate
Source: unknown Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 443 -> 39256
Source: unknown Network traffic detected: HTTP traffic on port 39256 -> 443
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Sample tries to kill a process (SIGKILL)
Source: /tmp/na.elf (PID: 6264) SIGKILL sent: pid: 6271, result: successful Jump to behavior
Source: classification engine Classification label: mal56.troj.linELF@0/0@4/0
Executes the "rm" command used to delete files or directories
Source: /usr/bin/dash (PID: 6272) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.4LbTawigsP /tmp/tmp.bf6cxzIhf6 /tmp/tmp.e6elOtG3HL Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/na.elf (PID: 6260) Queries kernel information via 'uname': Jump to behavior
Source: na.elf, 6260.1.000055b4a7853000.000055b4a78fb000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/mipsel
Source: na.elf, 6260.1.000055b4a7853000.000055b4a78fb000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/mipsel
Source: na.elf, 6260.1.00007fff3e4fb000.00007fff3e51c000.rw-.sdmp Binary or memory string: /usr/bin/qemu-mipsel
Source: na.elf, 6260.1.00007fff3e4fb000.00007fff3e51c000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-mipsel/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
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
34.249.145.219
 unknown United States
16509 AMAZON-02US false
109.202.202.202
 unknown Switzerland
13030 INIT7CH false
38.60.249.66
 eighteen.pirate United States
174 COGENT-174US true
91.189.91.42
 unknown United Kingdom
41231 CANONICAL-ASGB false

Contacted Domains

Name IP Active
eighteen.pirate 38.60.249.66 true
nineteen.libre. [malformed] unknown unknown
2joints.libre. [malformed] unknown unknown