Linux Analysis Report
4GtFbR4O3j.elf

Overview

General Information

Sample name: 4GtFbR4O3j.elf
renamed because original name is a hash value
Original sample name: 8264e58a77b9ca4424a8d9a9863e0ee6.elf
Analysis ID: 1432417
MD5: 8264e58a77b9ca4424a8d9a9863e0ee6
SHA1: 7d1446707b7db9ed4317637264f6414c9a151ff6
SHA256: e1dbc46eea55f940b6f63822b88b45e4be4fd122deb867a55e13f7b3820678ec
Tags: 32armelfmirai
Infos:

Detection

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

Signatures

Multi AV Scanner detection for submitted file
Yara detected Gafgyt
Deletes system log files
Manipulation of devices in /dev
Detected TCP or UDP traffic on non-standard ports
Sample has stripped symbol table
Sample listens on a socket
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

AV Detection
barindex
Multi AV Scanner detection for submitted file
Source: 4GtFbR4O3j.elf ReversingLabs: Detection: 52%
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.13:49468 -> 94.156.248.19:5667
Sample listens on a socket
Source: /tmp/4GtFbR4O3j.elf (PID: 5433) Socket: 127.0.0.1::46373 Jump to behavior
Source: unknown UDP traffic detected without corresponding DNS query: 51.77.149.139
Source: global traffic DNS traffic detected: DNS query: servernoworky.geek
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Source: classification engine Classification label: mal64.troj.evad.linELF@0/0@1/0

Data Obfuscation
barindex
Manipulation of devices in /dev
Source: /tmp/4GtFbR4O3j.elf (PID: 5440) Deleted: /dev/kmsg Jump to behavior

Hooking and other Techniques for Hiding and Protection
barindex
Deletes system log files
Source: /tmp/4GtFbR4O3j.elf (PID: 5440) Log files deleted: /var/log/kern.log Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/4GtFbR4O3j.elf (PID: 5433) Queries kernel information via 'uname': Jump to behavior
Source: 4GtFbR4O3j.elf, 5433.1.00007ffeca6f1000.00007ffeca712000.rw-.sdmp, 4GtFbR4O3j.elf, 5437.1.00007ffeca6f1000.00007ffeca712000.rw-.sdmp Binary or memory string: c_x86_64/usr/bin/qemu-arm/tmp/4GtFbR4O3j.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/4GtFbR4O3j.elf
Source: 4GtFbR4O3j.elf, 5433.1.000055a125c5f000.000055a125dd5000.rw-.sdmp, 4GtFbR4O3j.elf, 5437.1.000055a125c5f000.000055a125dd5000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: 4GtFbR4O3j.elf, 5433.1.000055a125c5f000.000055a125dd5000.rw-.sdmp, 4GtFbR4O3j.elf, 5437.1.000055a125c5f000.000055a125dd5000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: 4GtFbR4O3j.elf, 5433.1.00007ffeca6f1000.00007ffeca712000.rw-.sdmp, 4GtFbR4O3j.elf, 5437.1.00007ffeca6f1000.00007ffeca712000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm

Stealing of Sensitive Information
barindex
Yara detected Gafgyt
Source: Yara match File source: 4GtFbR4O3j.elf, type: SAMPLE
Source: Yara match File source: 5437.1.00007f57a4017000.00007f57a4039000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5433.1.00007f57a4017000.00007f57a4039000.r-x.sdmp, type: MEMORY

Remote Access Functionality
barindex
Yara detected Gafgyt
Source: Yara match File source: 4GtFbR4O3j.elf, type: SAMPLE
Source: Yara match File source: 5437.1.00007f57a4017000.00007f57a4039000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5433.1.00007f57a4017000.00007f57a4039000.r-x.sdmp, type: MEMORY
windows-stand
  • 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
94.156.248.19
 unknown Bulgaria
34224 NETERRA-ASBG false

Contacted Domains

Name IP Active
servernoworky.geek 94.156.248.18 true