Linux Analysis Report
arm.elf

Overview

General Information

Sample name: arm.elf
Analysis ID: 1544688
MD5: 5b47968e09bf42525b411dcde7477ef3
SHA1: 2b0974673058946db4eb5d445bf670019f3ac033
SHA256: 5202fc3af8b49fd031b381f4ceb9ad995852de9609dd34f23232a9bf3f5bed6a
Tags: elfMiraiuser-abuse_ch
Infos:

Detection

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

Signatures

Antivirus / Scanner detection for submitted sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Yara detected Mirai
Connects to many ports of the same IP (likely port scanning)
Detected TCP or UDP traffic on non-standard ports
Enumerates processes within the "proc" file system
Sample has stripped symbol table
Sample listens on a socket
Tries to resolve domain names, but no domain seems valid (expired dropper behavior)
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
Antivirus / Scanner detection for submitted sample
Source: arm.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: arm.elf ReversingLabs: Detection: 65%

Networking
barindex
Connects to many ports of the same IP (likely port scanning)
Source: global traffic TCP traffic: 193.84.71.119 ports 38241,1,2,3,4,8
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.14:43788 -> 193.84.71.119:38241
Sample listens on a socket
Source: /tmp/arm.elf (PID: 5492) Socket: 127.0.0.1:63841 Jump to behavior
Tries to resolve domain names, but no domain seems valid (expired dropper behavior)
Source: unknown DNS traffic detected: query: 193.84.71.119 replaycode: Name error (3)
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: unknown TCP traffic detected without corresponding DNS query: 193.84.71.119
Source: global traffic DNS traffic detected: DNS query: 193.84.71.119

System Summary
barindex
Malicious sample detected (through community Yara rule)
Source: arm.elf, type: SAMPLE Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5494.1.00007f8eb4017000.00007f8eb4026000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5492.1.00007f8eb4017000.00007f8eb4026000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 5498.1.00007f8eb4017000.00007f8eb4026000.r-x.sdmp, type: MEMORY Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Yara signature match
Source: arm.elf, type: SAMPLE 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: 5494.1.00007f8eb4017000.00007f8eb4026000.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: 5492.1.00007f8eb4017000.00007f8eb4026000.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: 5498.1.00007f8eb4017000.00007f8eb4026000.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.linELF@0/0@620/0
Enumerates processes within the "proc" file system
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/2672/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1583/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3120/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1577/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1610/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/512/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1299/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/514/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/519/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/2946/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/917/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3134/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1593/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3011/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3094/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/2955/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1589/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3129/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1588/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3125/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/767/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/800/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/888/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/801/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/769/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/803/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/806/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/807/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/928/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/2956/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/490/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3142/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1635/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1633/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1599/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3139/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1873/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1630/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/657/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/658/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/659/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/418/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/419/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1639/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1638/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1371/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/780/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/660/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/661/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/782/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1369/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/785/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1642/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/940/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/941/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1640/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3147/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1364/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/548/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1647/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/2991/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1383/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1382/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1381/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/791/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/671/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/794/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1655/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/795/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/674/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1653/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/797/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/2983/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3159/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/678/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1650/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3157/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/679/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1659/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3178/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1394/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3172/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3171/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/2999/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/683/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3207/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/684/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/2997/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1300/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1661/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/725/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/726/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1309/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/2517/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3189/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1560/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3188/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3187/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3184/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3183/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1712/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1557/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1314/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/3215/maps Jump to behavior
Source: /tmp/arm.elf (PID: 5504) File opened: /proc/1399/maps Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/arm.elf (PID: 5492) Queries kernel information via 'uname': Jump to behavior
Source: arm.elf, 5492.1.000055ef2f073000.000055ef2f1a1000.rw-.sdmp, arm.elf, 5494.1.000055ef2f073000.000055ef2f1a1000.rw-.sdmp, arm.elf, 5498.1.000055ef2f073000.000055ef2f1a1000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: arm.elf, 5492.1.00007ffdd9b32000.00007ffdd9b53000.rw-.sdmp, arm.elf, 5494.1.00007ffdd9b32000.00007ffdd9b53000.rw-.sdmp, arm.elf, 5498.1.00007ffdd9b32000.00007ffdd9b53000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/arm.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/arm.elf
Source: arm.elf, 5492.1.000055ef2f073000.000055ef2f1a1000.rw-.sdmp, arm.elf, 5494.1.000055ef2f073000.000055ef2f1a1000.rw-.sdmp, arm.elf, 5498.1.000055ef2f073000.000055ef2f1a1000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: arm.elf, 5492.1.00007ffdd9b32000.00007ffdd9b53000.rw-.sdmp, arm.elf, 5494.1.00007ffdd9b32000.00007ffdd9b53000.rw-.sdmp, arm.elf, 5498.1.00007ffdd9b32000.00007ffdd9b53000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm

Stealing of Sensitive Information
barindex
Yara detected Mirai
Source: Yara match File source: arm.elf, type: SAMPLE
Source: Yara match File source: 5494.1.00007f8eb4017000.00007f8eb4026000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5492.1.00007f8eb4017000.00007f8eb4026000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5498.1.00007f8eb4017000.00007f8eb4026000.r-x.sdmp, type: MEMORY

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: arm.elf, type: SAMPLE
Source: Yara match File source: 5494.1.00007f8eb4017000.00007f8eb4026000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5492.1.00007f8eb4017000.00007f8eb4026000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5498.1.00007f8eb4017000.00007f8eb4026000.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
193.84.71.119
 unknown Poland
199478 RADIOCABLE-ASES true

Contacted Domains

Name IP Active
193.84.71.119 unknown unknown