Linux Analysis Report
arm6.elf

Overview

General Information

Sample name: arm6.elf
Analysis ID: 1417378
MD5: 150ac90af6bf70f376150c9ff3fbbf72
SHA1: 1fdb1f607fcd552267c60b66fe29a8dd623aa1f6
SHA256: 0a9dec5a9200ef0d7200a9a99a24f907b7856f0cd0150dec9778ccecc400c9ed
Infos:

Detection

Mirai
Score: 64
Range: 0 - 100
Whitelisted: false

Signatures

Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Yara detected Mirai
Executes the "rm" command used to delete files or directories
Sample has stripped symbol table
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: arm6.elf ReversingLabs: Detection: 66%
Source: unknown TCP traffic detected without corresponding DNS query: 34.243.160.129
Source: unknown TCP traffic detected without corresponding DNS query: 185.125.190.26
Source: unknown TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown TCP traffic detected without corresponding DNS query: 185.125.190.26
Source: unknown UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: global traffic HTTP traffic detected: GET / HTTP/1.1User-Agent: wget/1.20.3-1ubuntu1 Ubuntu/20.04.2/LTS GNU/Linux/5.4.0-72-generic/x86_64 Intel(R)/Xeon(R)/Silver/4210/CPU/@/2.20GHz cloud_id/noneAccept: */*Accept-Encoding: identityHost: motd.ubuntu.comConnection: Keep-Alive
Source: unknown DNS traffic detected: queries for: daisy.ubuntu.com
Source: unknown Network traffic detected: HTTP traffic on port 54642 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 50528 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 443 -> 54642
Source: unknown Network traffic detected: HTTP traffic on port 48202 -> 443

System Summary
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Malicious sample detected (through community Yara rule)
Source: arm6.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5425.1.00007fee20017000.00007fee20027000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: arm6.elf PID: 5425, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Yara signature match
Source: arm6.elf, type: SAMPLE 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: 5425.1.00007fee20017000.00007fee20027000.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: Process Memory Space: arm6.elf PID: 5425, type: MEMORYSTR 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: classification engine Classification label: mal64.troj.linELF@0/0@2/0
Executes the "rm" command used to delete files or directories
Source: /usr/bin/dash (PID: 5489) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.v29QjLDgQl /tmp/tmp.FPCH14TmNe /tmp/tmp.CUD7BTdsYD Jump to behavior
Source: /usr/bin/dash (PID: 5498) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.v29QjLDgQl /tmp/tmp.FPCH14TmNe /tmp/tmp.CUD7BTdsYD Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/arm6.elf (PID: 5425) Queries kernel information via 'uname': Jump to behavior
Source: arm6.elf, 5425.1.00005632b1626000.00005632b1754000.rw-.sdmp Binary or memory string: 2V!/etc/qemu-binfmt/arm
Source: arm6.elf, 5425.1.00005632b1626000.00005632b1754000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: arm6.elf, 5425.1.00007ffc11352000.00007ffc11373000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: arm6.elf, 5425.1.00007ffc11352000.00007ffc11373000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/arm6.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/arm6.elf
Source: arm6.elf, 5425.1.00007ffc11352000.00007ffc11373000.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: arm6.elf, type: SAMPLE
Source: Yara match File source: 5425.1.00007fee20017000.00007fee20027000.r-x.sdmp, type: MEMORY

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: arm6.elf, type: SAMPLE
Source: Yara match File source: 5425.1.00007fee20017000.00007fee20027000.r-x.sdmp, type: MEMORY

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
185.125.190.26
 unknown United Kingdom
41231 CANONICAL-ASGB false
34.254.182.186
 unknown United States
16509 AMAZON-02US false
34.243.160.129
 unknown United States
16509 AMAZON-02US false

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.24 true

Contacted URLs

Name Malicious Antivirus Detection Reputation
https://motd.ubuntu.com/ false
    		high