25e4015ef827f43fd5987f172c04607f6a1934eda51443630476ed6184fe0f16

Analysis

max time kernel
149s
max time network
150s
platform
ubuntu-18.04_amd64
resource
ubuntu1804-amd64-20240611-en
resource tags

arch:amd64arch:i386image:ubuntu1804-amd64-20240611-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
submitted
13-12-2024 14:32

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General

Target

.5r3fqt67ew531has4231.x86.elf
Size

188KB
MD5

f36384e2b7c2d7c678c3967def352585
SHA1

459d26cf4798be72dd7a927efb7d4b6ffb9ef1c2
SHA256

25e4015ef827f43fd5987f172c04607f6a1934eda51443630476ed6184fe0f16
SHA512

65494f406ed60fa0f2cedeac032c9305d7bf110e0549a16d55a30dafcf27019ea5051c63f0cb740e66047da5a558e130a5bcb5e429c82370451c6d99db06da93
SSDEEP

3072:3sytfI/tjC/g53X6jLaWwzx7LgtkpLIoglNP27Tt3EwbZnm:XIpC/g53KjLaWw+V/mEwRm

Score

7^/10

defense_evasion discovery

Malware Config

Signatures

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

pid	Process
1493	chmod
1488	sh

Modifies Watchdog functionality 1 TTPs 2 IoCs

Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.

defense_evasion

Impair Defenses

T1562

description	ioc	Process
File opened for modification	/dev/watchdog	.5r3fqt67ew531has4231.x86.elf
File opened for modification	/dev/misc/watchdog	.5r3fqt67ew531has4231.x86.elf

Changes its process name 1 IoCs

description	ioc	pid	Process
Changes the process name, possibly in an attempt to hide itself	/bin/systemd	1487	.5r3fqt67ew531has4231.x86.elf

Reads runtime system information 3 IoCs

Reads data from /proc virtual filesystem.

discovery

description	ioc	Process
File opened for reading	/proc/filesystems	mkdir
File opened for reading	/proc/filesystems	mv
File opened for reading	/proc/self/maps	.5r3fqt67ew531has4231.x86.elf

Writes file to tmp directory 1 IoCs

Malware often drops required files in the /tmp directory.

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

/tmp/.5r3fqt67ew531has4231.x86.elf
/tmp/.5r3fqt67ew531has4231.x86.elf
1⤵
- Modifies Watchdog functionality
- Changes its process name
- Reads runtime system information
PID:1487
- /bin/sh
  sh -c "rm -rf bin/systemd && mkdir bin; >bin/systemd && mv /tmp/.5r3fqt67ew531has4231.x86.elf bin/systemd; chmod 777 bin/systemd"
  2⤵
  - File and Directory Permissions Modification
  - Writes file to tmp directory
  PID:1488
- - /bin/rm
    rm -rf bin/systemd
    3⤵
    PID:1489
- - /bin/mkdir
    mkdir bin
    3⤵
    - Reads runtime system information
    PID:1490
- - /bin/mv
    mv /tmp/.5r3fqt67ew531has4231.x86.elf bin/systemd
    3⤵
    - Reads runtime system information
    PID:1491
- - /bin/chmod
    chmod 777 bin/systemd
    3⤵
    - File and Directory Permissions Modification
    PID:1493

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

Impair Defenses

T1562

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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