Malware Analysis Report

2024-11-15 05:16

Sample ID 240421-aewn3sdf66
Target 6f1b1ef99ca4f554de499ccc6f9ba19a.elf
SHA256 978e62b2ce1ae0248f7ffd4da6692d4de2b2cb20d084ed27007196b0b744eb0b
Tags
mirai mirai evasion
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

978e62b2ce1ae0248f7ffd4da6692d4de2b2cb20d084ed27007196b0b744eb0b

Threat Level: Known bad

The file 6f1b1ef99ca4f554de499ccc6f9ba19a.elf was found to be: Known bad.

Malicious Activity Summary

mirai mirai evasion

Mirai family

Modifies Watchdog functionality

Deletes Audit logs

Deletes itself

Deletes journal logs

Deletes system logs

Deletes log files

Enumerates running processes

Changes its process name

Reads runtime system information

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-21 00:08

Signatures

Mirai family

mirai

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-21 00:08

Reported

2024-04-21 00:10

Platform

ubuntu2004-amd64-20240221-en

Max time kernel

148s

Max time network

142s

Command Line

[/tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf]

Signatures

Deletes Audit logs

evasion
Description Indicator Process Target
File deleted /var/log/audit/audit.log /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A

Deletes itself

Description Indicator Process Target
N/A N/A /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A

Deletes journal logs

evasion
Description Indicator Process Target
File deleted /var/log/journal/4816dd152e8c48ff97e9117d197c13d8/system.journal /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A

Deletes system logs

evasion
Description Indicator Process Target
File deleted /var/log/syslog /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A

Modifies Watchdog functionality

Description Indicator Process Target
File opened for modification /dev/watchdog /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for modification /dev/misc/watchdog /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A

Deletes log files

Description Indicator Process Target
File deleted /var/log/auth.log /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File deleted /var/log/ubuntu-advantage.log /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A

Enumerates running processes

Changes its process name

Description Indicator Process Target
Changes the process name, possibly in an attempt to hide itself N/A /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A

Reads runtime system information

Description Indicator Process Target
File opened for reading /proc/1187/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1397/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1544/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1586/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/201/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1076/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1572/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1718/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1720/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1740/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1742/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/442/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/507/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/14/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/70/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/159/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1103/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1474/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1588/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/2/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/4/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1721/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/102/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/164/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1407/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1408/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1515/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/16/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/85/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/980/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/13/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/18/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/778/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1075/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1141/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1411/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1657/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/89/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/176/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/441/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1406/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1600/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1659/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1713/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1732/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/23/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/86/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1117/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1172/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1430/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1535/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1550/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1559/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/520/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1021/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1591/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1470/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1509/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/9/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/174/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1403/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1549/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1674/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A
File opened for reading /proc/1756/cmdline /tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf N/A

Processes

/tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf

[/tmp/6f1b1ef99ca4f554de499ccc6f9ba19a.elf]

Network

Country Destination Domain Proto
N/A 224.0.0.251:5353 udp
US 1.1.1.1:53 tcpdown.su udp
US 1.1.1.1:53 daisy.ubuntu.com udp
US 1.1.1.1:53 daisy.ubuntu.com udp
US 1.1.1.1:53 daisy.ubuntu.com udp
US 1.1.1.1:53 daisy.ubuntu.com udp
US 1.1.1.1:53 daisy.ubuntu.com udp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 1.1.1.1:53 _http._tcp.security.ubuntu.com udp
US 1.1.1.1:53 _http._tcp.nl.archive.ubuntu.com udp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 1.1.1.1:53 _https._tcp.motd.ubuntu.com udp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 104.168.45.11:7722 tcp
US 1.1.1.1:53 _https._tcp.esm.ubuntu.com udp
US 1.1.1.1:53 connectivity-check.ubuntu.com udp
US 1.1.1.1:53 tcpdown.su udp
US 1.1.1.1:53 tcpdown.su udp
US 1.1.1.1:53 tcpdown.suxS�hS�>� udp
US 1.1.1.1:53 security.ubuntu.com udp
US 1.1.1.1:53 security.ubuntu.com udp
US 1.1.1.1:53 nl.archive.ubuntu.com udp
US 1.1.1.1:53 nl.archive.ubuntu.com udp
GB 185.125.190.36:80 security.ubuntu.com tcp
NL 213.136.12.213:80 nl.archive.ubuntu.com tcp
GB 185.125.190.39:80 security.ubuntu.com tcp
US 91.189.91.81:80 security.ubuntu.com tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 104.168.45.11:7722 tcpdown.su tcp
NL 213.136.12.213:80 nl.archive.ubuntu.com tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 1.1.1.1:53 tcpdown.suxS�hS�>� udp
US 104.168.45.11:7722 tcpdown.su tcp
NL 213.136.12.213:80 nl.archive.ubuntu.com tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 1.1.1.1:53 tcpdown.suxS�hS�>� udp
US 104.168.45.11:7722 tcpdown.su tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 104.168.45.11:7722 tcpdown.su tcp
US 1.1.1.1:53 tcpdown.suxS�hS�>� udp
US 1.1.1.1:53 tcpdown.suxS�hS�>� udp
BG 185.216.70.168:21425 tcpdown.su tcp
US 1.1.1.1:53 connectivity-check.ubuntu.com udp

Files

N/A