Linux Analysis Report
nsharm6.elf

Overview

General Information

Sample name: nsharm6.elf
Analysis ID: 1579305
MD5: f66f41d97da69196bd49bc3021a4ef31
SHA1: cde0e721ddb875a37a7ce3d3e8abc9c9ec473782
SHA256: 8671c416ddde7ea4b6275630ade867f4398dd9aed29cdaa122362704e8eaa27c
Tags: elfuser-abuse_ch
Infos:

Detection

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

Signatures

Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
Yara detected Mirai
Sample has stripped symbol table
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Uses the "uname" system call to query kernel version information (possible evasion)

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: nsharm6.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: nsharm6.elf ReversingLabs: Detection: 36%
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Source: global traffic TCP traffic: 192.168.2.13:48202 -> 185.125.190.26:443
Source: unknown TCP traffic detected without corresponding DNS query: 185.125.190.26
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 DNS traffic detected: DNS query: daisy.ubuntu.com
Source: unknown Network traffic detected: HTTP traffic on port 48202 -> 443
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Source: classification engine Classification label: mal64.troj.linELF@0/0@2/0
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/nsharm6.elf (PID: 5432) Queries kernel information via 'uname': Jump to behavior
Source: nsharm6.elf, 5432.1.00007ffe68ea8000.00007ffe68ec9000.rw-.sdmp Binary or memory string: Cx86_64/usr/bin/qemu-arm/tmp/nsharm6.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/nsharm6.elf
Source: nsharm6.elf, 5432.1.00005618cb8a2000.00005618cb9d0000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: nsharm6.elf, 5432.1.00005618cb8a2000.00005618cb9d0000.rw-.sdmp Binary or memory string: V!/etc/qemu-binfmt/arm
Source: nsharm6.elf, 5432.1.00007ffe68ea8000.00007ffe68ec9000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: nsharm6.elf, 5432.1.00007ffe68ea8000.00007ffe68ec9000.rw-.sdmp Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Stealing of Sensitive Information
barindex
Yara detected Mirai
Source: Yara match File source: nsharm6.elf, type: SAMPLE
Source: Yara match File source: 5432.1.00007f5720017000.00007f572002b000.r-x.sdmp, type: MEMORY

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: nsharm6.elf, type: SAMPLE
Source: Yara match File source: 5432.1.00007f5720017000.00007f572002b000.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

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.25 true