Linux Analysis Report
na.elf

Overview

General Information

Sample name: na.elf
Analysis ID: 1530539
MD5: e52014f7cb62427bc745c6b2f4ddcd78
SHA1: 27cdbbbc637d1d5da9d91a60ce556df6a4cf62eb
SHA256: 8b9f56ce51585b0b453096e1600c20976ce8de625e6c2034961feda858f986f6
Tags: elfuser-abuse_ch
Infos:

Detection

Mirai
Score: 76
Range: 0 - 100
Whitelisted: false

Signatures

Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Yara detected Mirai
Sample is packed with UPX
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)
Yara signature match

Classification

AV Detection
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Multi AV Scanner detection for submitted file
Source: na.elf ReversingLabs: Detection: 60%
Source: global traffic DNS traffic detected: DNS query: daisy.ubuntu.com
Source: na.elf String found in binary or memory: http://upx.sf.net

System Summary
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Malicious sample detected (through community Yara rule)
Source: 5483.1.00007f232c017000.00007f232c02e000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Sample contains only a LOAD segment without any section mappings
Source: LOAD without section mappings Program segment: 0x8000
Yara signature match
Source: 5483.1.00007f232c017000.00007f232c02e000.r-x.sdmp, type: MEMORY Matched rule: MAL_ELF_LNX_Mirai_Oct10_2 date = 2018-10-27, hash1 = fa0018e75f503f9748a5de0d14d4358db234f65e28c31c8d5878cc58807081c9, author = Florian Roth, description = Detects ELF malware Mirai related, reference = Internal Research
Source: classification engine Classification label: mal76.troj.evad.linELF@0/0@2/0

Data Obfuscation
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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 3.94 Copyright (C) 1996-2017 the UPX Team. All Rights Reserved. $
ELF contains segments with high entropy indicating compressed/encrypted content
Source: na.elf Submission file: segment LOAD with 7.9642 entropy (max. 8.0)
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/na.elf (PID: 5483) Queries kernel information via 'uname': Jump to behavior
Source: na.elf, 5483.1.00007ffeb8199000.00007ffeb81ba000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/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, 5483.1.0000559cea1bd000.0000559cea3ab000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: na.elf, 5483.1.0000559cea1bd000.0000559cea3ab000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: na.elf, 5483.1.00007ffeb8199000.00007ffeb81ba000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: na.elf, 5483.1.00007ffeb8199000.00007ffeb81ba000.rw-.sdmp Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Stealing of Sensitive Information
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Yara detected Mirai
Source: Yara match File source: 5483.1.00007f232c017000.00007f232c02e000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: na.elf PID: 5483, type: MEMORYSTR

Remote Access Functionality
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Yara detected Mirai
Source: Yara match File source: 5483.1.00007f232c017000.00007f232c02e000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: na.elf PID: 5483, type: MEMORYSTR
windows-stand
⊘No contacted IP infos

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.24 true