ef8494f6a6268d297d495fed8c56d2d0c312c7d89a2ddcd89599f13b8291b8b3

Analysis

max time kernel
149s
max time network
145s
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
14-12-2024 14:07

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General

Target

ef8494f6a6268d297d495fed8c56d2d0c312c7d89a2ddcd89599f13b8291b8b3.elf
Size

151KB
MD5

79d777cf0e2ce83656f7adde07449985
SHA1

55fc2d5aa97fc5b2f849e77e523b61a5df19b704
SHA256

ef8494f6a6268d297d495fed8c56d2d0c312c7d89a2ddcd89599f13b8291b8b3
SHA512

d65bb37155ac083b115caecc9610efc851ec070ffe435bf5b8c79968dbfad29a0c12f634e87857be9c67146d1df3730a57af6e6fa48d6f85438e664c6aef47fd
SSDEEP

3072:irPYUiYp28euRPd45oM4S+nfqWCXbJOvUwbZno:irG98vVd4554pniWCXNO8wRo

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
649	sh
661	chmod

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	ef8494f6a6268d297d495fed8c56d2d0c312c7d89a2ddcd89599f13b8291b8b3.elf
File opened for modification	/dev/misc/watchdog	ef8494f6a6268d297d495fed8c56d2d0c312c7d89a2ddcd89599f13b8291b8b3.elf

Changes its process name 1 IoCs

description	ioc	pid	Process
Changes the process name, possibly in an attempt to hide itself	/bin/watchdog	648	ef8494f6a6268d297d495fed8c56d2d0c312c7d89a2ddcd89599f13b8291b8b3.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	ef8494f6a6268d297d495fed8c56d2d0c312c7d89a2ddcd89599f13b8291b8b3.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/watchdog	sh

/tmp/ef8494f6a6268d297d495fed8c56d2d0c312c7d89a2ddcd89599f13b8291b8b3.elf
/tmp/ef8494f6a6268d297d495fed8c56d2d0c312c7d89a2ddcd89599f13b8291b8b3.elf
1⤵
- Modifies Watchdog functionality
- Changes its process name
- Reads runtime system information
PID:648
- /bin/sh
  sh -c "rm -rf bin/watchdog && mkdir bin; >bin/watchdog && mv /tmp/ef8494f6a6268d297d495fed8c56d2d0c312c7d89a2ddcd89599f13b8291b8b3.elf bin/watchdog; chmod 777 bin/watchdog"
  2⤵
  - File and Directory Permissions Modification
  - Writes file to tmp directory
  PID:649
- - /bin/rm
    rm -rf bin/watchdog
    3⤵
    PID:651
- - /bin/mkdir
    mkdir bin
    3⤵
    - Reads runtime system information
    PID:652
- - /bin/mv
    mv /tmp/ef8494f6a6268d297d495fed8c56d2d0c312c7d89a2ddcd89599f13b8291b8b3.elf bin/watchdog
    3⤵
    - Reads runtime system information
    PID:659
- - /bin/chmod
    chmod 777 bin/watchdog
    3⤵
    - File and Directory Permissions Modification
    PID:661

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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