Linux Analysis Report
lab3.elf

Overview

General Information

Sample name: lab3.elf
Analysis ID: 1417302
MD5: 08ee9612139c00b1a60d3078a1c94f5a
SHA1: 33e9c319efded472c2b4622b1357495a4284f9cc
SHA256: ffce0d47281a3673151f4dc6aa97200250a9efe132bdd15d5c265d3c8dd39202
Tags: elfsupershell
Infos:

Detection

Score: 22
Range: 0 - 100
Whitelisted: false

Signatures

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)

Classification

Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.23:41448 -> 35.232.11.46:3232
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: 91.189.91.43
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: 91.189.91.43
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: 91.189.91.43
Source: unknown DNS traffic detected: queries for: lab3.soillsec.com
Source: lab3.elf String found in binary or memory: http://upx.sf.net
Source: unknown Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 42836 -> 443
Sample contains only a LOAD segment without any section mappings
Source: LOAD without section mappings Program segment: 0x400000
Source: classification engine Classification label: sus22.evad.linELF@0/0@3/0

Data Obfuscation
barindex
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 3.96 Copyright (C) 1996-2020 the UPX Team. All Rights Reserved. $
Source: submitted sample Stderr: 2024/03/28 22:27:40 Forking2024/03/28 22:27:41 Connecting to lab3.soillsec.com:3232: exit code = 0
ELF contains segments with high entropy indicating compressed/encrypted content
Source: lab3.elf Submission file: segment LOAD with 7.8851 entropy (max. 8.0)
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /proc/self/exe (PID: 6222) Queries kernel information via 'uname': Jump to behavior
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
109.202.202.202
 unknown Switzerland
13030 INIT7CH false
91.189.91.43
 unknown United Kingdom
41231 CANONICAL-ASGB false
35.232.11.46
 lab3.soillsec.com United States
15169 GOOGLEUS false
91.189.91.42
 unknown United Kingdom
41231 CANONICAL-ASGB false

Contacted Domains

Name IP Active
lab3.soillsec.com 35.232.11.46 true