Linux Analysis Report
na.elf

Overview

General Information

Sample name: na.elf
Analysis ID: 1527367
MD5: b12d19bcf7b417ec41ffe87df5f80970
SHA1: dd9e77314729b9f43ed09d037cb6004b7565b348
SHA256: 85d443a739267b5d780ed0920d72631380b7ca5797f6b2247bedcc9da17b48f3
Tags: elfSupershelluser-abuse_ch
Infos:

Detection

Score: 48
Range: 0 - 100
Whitelisted: false

Signatures

Machine Learning detection for sample
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
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

AV Detection
barindex
Machine Learning detection for sample
Source: na.elf Joe Sandbox ML: detected
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.13:45800 -> 20.2.223.147:3232
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: unknown TCP traffic detected without corresponding DNS query: 20.2.223.147
Source: global traffic DNS traffic detected: DNS query: daisy.ubuntu.com
Source: na.elf String found in binary or memory: http://upx.sf.net
Sample contains only a LOAD segment without any section mappings
Source: LOAD without section mappings Program segment: 0x400000
Source: classification engine Classification label: mal48.evad.linELF@0/0@2/0

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: 2024/10/06 15:59:08 Forking2024/10/06 15:59:08 Connecting to 20.2.223.147:32322024/10/06 15:59:12 Successfully connnected 20.2.223.147:32322024/10/06 15:59:12 [client] INFO ??:1 BoFsrOtr() : Handling channel: jump2024/10/06 15:59:15 [20.2.223.147:3232] INFO ??:1 () : New SSH connection, version SSH-2.0-paramiko_3.0.02024/10/06 15:59:15 [20.2.223.147:3232] INFO ??:1 BoFsrOtr() : Handling channel: session2024/10/06 15:59:16 [20.2.223.147:3232] INFO ??:1 BoFsrOtr() : Handling channel: session2024/10/06 15:59:17 [20.2.223.147:3232] INFO ??:1 IFu6thF7() : Session got request: "exec"2024/10/06 15:59:17 [20.2.223.147:3232] INFO ??:3 IFu6thF7() : Session disconnected2024/10/06 15:59:18 [20.2.223.147:3232] INFO ??:6 IFu6thF7() : Session disconnected2024/10/06 15:59:18 [client] ERROR ??:1 () : Channel call back error: connection terminated: exit code = 0
ELF contains segments with high entropy indicating compressed/encrypted content
Source: na.elf Submission file: segment LOAD with 7.885 entropy (max. 8.0)
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /proc/self/exe (PID: 5485) Queries kernel information via 'uname': Jump to behavior

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
20.2.223.147
 unknown United States
8075 MICROSOFT-CORP-MSN-AS-BLOCKUS false

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.24 true