Linux Analysis Report
sh4.elf

Overview

General Information

Sample name: sh4.elf
Analysis ID: 1562848
MD5: 8e4980d99e1f8cb3379d35e3086cca4d
SHA1: e836e9eefdad557be19dfecfdc3fbc403c91b206
SHA256: d7adef09163e62b1bf29529e7338c17a5db876e3224cef2afab2f5f93c99c4a7
Tags: elfuser-abuse_ch
Infos:

Detection

Gafgyt, Mirai
Score: 68
Range: 0 - 100
Whitelisted: false

Signatures

Multi AV Scanner detection for submitted file
Yara detected Gafgyt
Yara detected Mirai
Opens /proc/net/* files useful for finding connected devices and routers
Detected TCP or UDP traffic on non-standard ports
Executes the "rm" command used to delete files or directories
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
Bashlite, Gafgyt Bashlite is a malware family which infects Linux systems in order to launch distributed denial-of-service attacks (DDoS). Originally it was also known under the name Bashdoor, but this term now refers to the exploit method used by the malware. It has been used to launch attacks of up to 400 Gbps. No Attribution https://malpedia.caad.fkie.fraunhofer.de/details/elf.bashlite
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: sh4.elf ReversingLabs: Detection: 57%

Spreading
barindex
Opens /proc/net/* files useful for finding connected devices and routers
Source: /tmp/sh4.elf (PID: 6239) Opens: /proc/net/route Jump to behavior
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.23:50390 -> 193.111.248.45:276
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Source: global traffic TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global traffic TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: global traffic TCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown TCP traffic detected without corresponding DNS query: 193.111.248.45
Source: unknown Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 42836 -> 443
Source: classification engine Classification label: mal68.spre.troj.linELF@0/0@0/0
Source: sh4.elf ELF static info symbol of initial sample: /home/firmware/build/temp-sh4/gcc-core/gcc/config/sh/lib1funcs.asm
Source: sh4.elf ELF static info symbol of initial sample: /home/firmware/build/temp-sh4/gcc-core/gcc/config/sh/lib1funcs.asm
Source: sh4.elf ELF static info symbol of initial sample: libc/string/sh/sh4/memcpy.S
Source: sh4.elf ELF static info symbol of initial sample: libc/sysdeps/linux/sh/crt1.S
Source: sh4.elf ELF static info symbol of initial sample: libc/sysdeps/linux/sh/crti.S
Source: sh4.elf ELF static info symbol of initial sample: libc/sysdeps/linux/sh/crtn.S
Source: sh4.elf ELF static info symbol of initial sample: libc/sysdeps/linux/sh/vfork.S
Executes the "rm" command used to delete files or directories
Source: /usr/bin/dash (PID: 6217) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.2WbCjJ6Io2 /tmp/tmp.eIOne8WmEs /tmp/tmp.0JFMJ6cge1 Jump to behavior
Source: /usr/bin/dash (PID: 6226) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.2WbCjJ6Io2 /tmp/tmp.eIOne8WmEs /tmp/tmp.0JFMJ6cge1 Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/sh4.elf (PID: 6239) Queries kernel information via 'uname': Jump to behavior
Source: sh4.elf, 6239.1.00007ffd1e38e000.00007ffd1e3af000.rw-.sdmp, sh4.elf, 6241.1.00007ffd1e38e000.00007ffd1e3af000.rw-.sdmp, sh4.elf, 6243.1.00007ffd1e38e000.00007ffd1e3af000.rw-.sdmp Binary or memory string: /usr/bin/qemu-sh4
Source: sh4.elf, 6239.1.0000561f83e41000.0000561f83ec6000.rw-.sdmp, sh4.elf, 6241.1.0000561f83e41000.0000561f83ec6000.rw-.sdmp, sh4.elf, 6243.1.0000561f83e41000.0000561f83ec6000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/sh4
Source: sh4.elf, 6239.1.00007ffd1e38e000.00007ffd1e3af000.rw-.sdmp, sh4.elf, 6241.1.00007ffd1e38e000.00007ffd1e3af000.rw-.sdmp, sh4.elf, 6243.1.00007ffd1e38e000.00007ffd1e3af000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-sh4/tmp/sh4.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/sh4.elf
Source: sh4.elf, 6239.1.0000561f83e41000.0000561f83ec6000.rw-.sdmp, sh4.elf, 6241.1.0000561f83e41000.0000561f83ec6000.rw-.sdmp, sh4.elf, 6243.1.0000561f83e41000.0000561f83ec6000.rw-.sdmp Binary or memory string: V5!/etc/qemu-binfmt/sh4

Stealing of Sensitive Information
barindex
Yara detected Gafgyt
Source: Yara match File source: sh4.elf, type: SAMPLE
Yara detected Mirai
Source: Yara match File source: sh4.elf, type: SAMPLE
Source: Yara match File source: 6239.1.00007fc274400000.00007fc274410000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 6241.1.00007fc274400000.00007fc274410000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 6243.1.00007fc274400000.00007fc274410000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: sh4.elf PID: 6239, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: sh4.elf PID: 6241, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: sh4.elf PID: 6243, type: MEMORYSTR

Remote Access Functionality
barindex
Yara detected Gafgyt
Source: Yara match File source: sh4.elf, type: SAMPLE
Yara detected Mirai
Source: Yara match File source: sh4.elf, type: SAMPLE
Source: Yara match File source: 6239.1.00007fc274400000.00007fc274410000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 6241.1.00007fc274400000.00007fc274410000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 6243.1.00007fc274400000.00007fc274410000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: sh4.elf PID: 6239, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: sh4.elf PID: 6241, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: sh4.elf PID: 6243, type: MEMORYSTR

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
109.202.202.202
 unknown Switzerland
13030 INIT7CH false
193.111.248.45
 unknown Russian Federation
8100 ASN-QUADRANET-GLOBALUS false
91.189.91.43
 unknown United Kingdom
41231 CANONICAL-ASGB false
91.189.91.42
 unknown United Kingdom
41231 CANONICAL-ASGB false