Linux Analysis Report
sora.arm5.elf

Overview

General Information

Sample name: sora.arm5.elf
Analysis ID: 1561516
MD5: 0f3bf088c51cb175d07805034c3d6125
SHA1: 78596941a4af4de31a9bbeebdc30891093606453
SHA256: 9fd9b59e36b6210651817c3ec71eea7f4b13d452848e8f19b3e0b00a12dc7818
Tags: elfuser-abuse_ch
Infos:

Detection

Mirai
Score: 68
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

Name Description Attribution Blogpost URLs Link
Mirai Mirai is one of the first significant botnets targeting exposed networking devices running Linux. Found in August 2016 by MalwareMustDie, its name means "future" in Japanese. Nowadays it targets a wide range of networked embedded devices such as IP cameras, home routers (many vendors involved), and other IoT devices. Since the source code was published on "Hack Forums" many variants of the Mirai family appeared, infecting mostly home networks all around the world. No Attribution https://malpedia.caad.fkie.fraunhofer.de/details/elf.mirai

AV Detection
barindex
Multi AV Scanner detection for submitted file
Source: sora.arm5.elf ReversingLabs: Detection: 39%
Source: sora.arm5.elf String found in binary or memory: http://upx.sf.net

System Summary
barindex
Malicious sample detected (through community Yara rule)
Source: 5435.1.00007f832c017000.00007f832c026000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5435.1.00007f832c017000.00007f832c026000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Sample contains only a LOAD segment without any section mappings
Source: LOAD without section mappings Program segment: 0x8000
Yara signature match
Source: 5435.1.00007f832c017000.00007f832c026000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16
Source: 5435.1.00007f832c017000.00007f832c026000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_ea92cca8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = aa4aee9f3d6bedd8234eaf8778895a0f5d71c42b21f2a428f01f121e85704e8e, id = ea92cca8-bba7-4a1c-9b88-a2d051ad0021, last_modified = 2021-09-16
Source: classification engine Classification label: mal68.troj.evad.linELF@0/0@0/0

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 3.94 Copyright (C) 1996-2017 the UPX Team. All Rights Reserved. $
ELF contains segments with high entropy indicating compressed/encrypted content
Source: sora.arm5.elf Submission file: segment LOAD with 7.9303 entropy (max. 8.0)
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/sora.arm5.elf (PID: 5435) Queries kernel information via 'uname': Jump to behavior
Source: sora.arm5.elf, 5435.1.00007ffda676e000.00007ffda678f000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/sora.arm5.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/sora.arm5.elf
Source: sora.arm5.elf, 5435.1.000055ed15a5a000.000055ed15c28000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: sora.arm5.elf, 5435.1.000055ed15a5a000.000055ed15c28000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: sora.arm5.elf, 5435.1.00007ffda676e000.00007ffda678f000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm

Stealing of Sensitive Information
barindex
Yara detected Mirai
Source: Yara match File source: 5435.1.00007f832c017000.00007f832c026000.r-x.sdmp, type: MEMORY

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: 5435.1.00007f832c017000.00007f832c026000.r-x.sdmp, type: MEMORY

No Screenshots

⊘No contacted IP infos