Linux Analysis Report
zersh4.elf

Overview

General Information

Sample name: zersh4.elf
Analysis ID: 1543113
MD5: 69c06f74f2d01a61af66c16b94dc6e69
SHA1: 197b464349a2f892a8c56de727b595a0ff75d53b
SHA256: a2e0455a1f5df5ae123205bde79c67e29b711fc26687c1798786ef6eff4567bf
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
Sample has stripped symbol table
Sample listens on a socket
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

AV Detection
barindex
Multi AV Scanner detection for submitted file
Source: zersh4.elf ReversingLabs: Detection: 44%

Networking
barindex
Connects to many ports of the same IP (likely port scanning)
Source: global traffic TCP traffic: 185.150.24.67 ports 38241,1,2,3,4,8
Source: global traffic TCP traffic: 45.156.86.24 ports 38241,1,2,3,4,8
Sends malformed DNS queries
Source: global traffic DNS traffic detected: malformed DNS query: netfags.geek. [malformed]
Source: global traffic DNS traffic detected: malformed DNS query: chinklabs.dyn. [malformed]
Source: global traffic DNS traffic detected: malformed DNS query: yellowchink.pirate. [malformed]
Source: global traffic DNS traffic detected: malformed DNS query: burnthe.libre. [malformed]
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.14:57382 -> 45.156.86.24:38241
Source: global traffic TCP traffic: 192.168.2.14:49902 -> 185.150.24.67:38241
Sample listens on a socket
Source: /tmp/zersh4.elf (PID: 5636) Socket: 127.0.0.1:39148 Jump to behavior
Source: unknown UDP traffic detected without corresponding DNS query: 185.181.61.24
Source: unknown UDP traffic detected without corresponding DNS query: 185.181.61.24
Source: unknown UDP traffic detected without corresponding DNS query: 185.181.61.24
Source: unknown UDP traffic detected without corresponding DNS query: 194.36.144.87
Source: unknown UDP traffic detected without corresponding DNS query: 168.235.111.72
Source: unknown UDP traffic detected without corresponding DNS query: 81.169.136.222
Source: unknown UDP traffic detected without corresponding DNS query: 202.61.197.122
Source: unknown UDP traffic detected without corresponding DNS query: 168.235.111.72
Source: unknown UDP traffic detected without corresponding DNS query: 202.61.197.122
Source: unknown UDP traffic detected without corresponding DNS query: 194.36.144.87
Source: unknown UDP traffic detected without corresponding DNS query: 51.158.108.203
Source: unknown UDP traffic detected without corresponding DNS query: 194.36.144.87
Source: global traffic DNS traffic detected: DNS query: netfags.geek
Source: global traffic DNS traffic detected: DNS query: chinklabs.dyn
Source: global traffic DNS traffic detected: DNS query: burnthe.libre
Source: global traffic DNS traffic detected: DNS query: yellowchink.pirate
Source: global traffic DNS traffic detected: DNS query: netfags.geek. [malformed]
Source: global traffic DNS traffic detected: DNS query: chinklabs.dyn. [malformed]
Source: global traffic DNS traffic detected: DNS query: yellowchink.pirate. [malformed]
Source: global traffic DNS traffic detected: DNS query: burnthe.libre. [malformed]
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@12/0
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/zersh4.elf (PID: 5636) Queries kernel information via 'uname': Jump to behavior
Source: zersh4.elf, 5636.1.00007ffd96ca4000.00007ffd96cc5000.rw-.sdmp Binary or memory string: /usr/bin/qemu-sh4
Source: zersh4.elf, 5636.1.000055ed7f38d000.000055ed7f3f0000.rw-.sdmp Binary or memory string: U5!/etc/qemu-binfmt/sh4
Source: zersh4.elf, 5636.1.000055ed7f38d000.000055ed7f3f0000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/sh4
Source: zersh4.elf, 5636.1.00007ffd96ca4000.00007ffd96cc5000.rw-.sdmp Binary or memory string: tx86_64/usr/bin/qemu-sh4/tmp/zersh4.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/zersh4.elf

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
185.150.24.67
 chinklabs.dyn Netherlands
44592 SKYLINKNL true
45.156.86.24
 netfags.geek Germany
44592 SKYLINKNL true

Contacted Domains

Name IP Active
netfags.geek 45.156.86.24 true
yellowchink.pirate 45.156.86.24 true
chinklabs.dyn 185.150.24.67 true
burnthe.libre 45.156.86.24 true
chinklabs.dyn. [malformed] unknown unknown
netfags.geek. [malformed] unknown unknown
burnthe.libre. [malformed] unknown unknown
yellowchink.pirate. [malformed] unknown unknown