mirai | 38be69c29b666dd50612c0a2223b65d2cb0566b779248df393b536ec4e22f429

Analysis

max time kernel
148s
max time network
151s
platform
debian-9_armhf
resource
debian9-armhf-20240611-en
resource tags

arch:armhfimage:debian9-armhf-20240611-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
submitted
13-11-2024 23:47

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General

Target

botnet.arm5.elf
Size

33KB
MD5

11ff4ac7c5e5ccc9690ff7cde902243d
SHA1

ed8098b637b33a8cd959c42c209a2a2380f7eeac
SHA256

38be69c29b666dd50612c0a2223b65d2cb0566b779248df393b536ec4e22f429
SHA512

15a50ab079cd77887a97f016eb40adb5061d66171b07e9295fe115fadfba6edaf14e2712f66b4c5d8884a2dbbcb26cabac91c01a9d09eaa56d60f56506b1850c
SSDEEP

768:qVeJDGugClAp31el6Om8+C60RruXOrQl+QmHTw3zVdIg3Uc:ZDG53QYOKCRRruXO8l+rHs3z8G

Score

10^/10

mirai mirai botnet defense_evasion discovery

Malware Config

Extracted

Family

mirai

Botnet

MIRAI

Signatures

Mirai
Mirai is a prevalent Linux malware infecting exposed network devices.
botnet mirai
Mirai family
mirai
Contacts a large (23830) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
File and Directory Permissions Modification 1 TTPs 2 IoCs
Adversaries may modify file or directory permissions to evade defenses.
defense_evasion

Linux and Mac File and Directory Permissions Modification
T1222.002

Processes:

chmodsh

pid process

666 chmod
657 sh
Changes its process name 1 IoCs

Processes:

botnet.arm5.elf

description ioc pid process

Changes the process name, possibly in an attempt to hide itself /bin/systemd 656 botnet.arm5.elf

pid	process
666	chmod
657	sh

description	ioc	pid	process
Changes the process name, possibly in an attempt to hide itself	/bin/systemd	656	botnet.arm5.elf

Reads runtime system information 3 IoCs

Reads data from /proc virtual filesystem.

discovery

Processes:

mkdirmvbotnet.arm5.elf

description	ioc	process
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	mv
File opened for reading	/proc/self/exe	botnet.arm5.elf

Writes file to tmp directory 1 IoCs
Malware often drops required files in the /tmp directory.

Processes:

sh

description ioc process

File opened for modification /tmp/bin/systemd sh

description	ioc	process
File opened for modification	/tmp/bin/systemd	sh

/tmp/botnet.arm5.elf
/tmp/botnet.arm5.elf
1⤵
- Changes its process name
- Reads runtime system information
PID:656
- /bin/sh
  sh -c "rm -rf bin/systemd && mkdir bin; >bin/systemd && mv /tmp/botnet.arm5.elf bin/systemd; chmod 777 bin/systemd"
  2⤵
  - File and Directory Permissions Modification
  - Writes file to tmp directory
  PID:657
- - /bin/rm
    rm -rf bin/systemd
    3⤵
    PID:658
- - /bin/mkdir
    mkdir bin
    3⤵
    - Reads runtime system information
    PID:660
- - /bin/mv
    mv /tmp/botnet.arm5.elf bin/systemd
    3⤵
    - Reads runtime system information
    PID:662
- - /bin/chmod
    chmod 777 bin/systemd
    3⤵
    - File and Directory Permissions Modification
    PID:666

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Linux and Mac File and Directory Permissions Modification

T1222.002

Credential Access

Discovery

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/656-1-0x00008000-0x000256b4-memory.dmp

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