83a1f973294cb52b7c92aa99073d5b283d06202eba8c0cc3426df8cc0658608d

Analysis

max time kernel
150s
max time network
150s
platform
debian-12_mipsel
resource
debian12-mipsel-20240729-en
resource tags

arch:mipselimage:debian12-mipsel-20240729-enkernel:6.1.0-17-4kc-maltalocale:en-usos:debian-12-mipselsystem
submitted
13-12-2024 14:32

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General

Target

.5r3fqt67ew531has4231.mpsl.elf
Size

204KB
MD5

f5713874d46ad9b6a020c5f2a3b4a30b
SHA1

c6c01bcd2ce98d702b3c465e0f022ddfdcff340d
SHA256

83a1f973294cb52b7c92aa99073d5b283d06202eba8c0cc3426df8cc0658608d
SHA512

a6fccac1a8b4a902aaf85844b4bd5c6f18daac8f516a1ccbf5a30715a4277fd622385c205bb4310b712215d2e713259d37f8b3e43d700c5a1b148111a904a621
SSDEEP

3072:Wf3SR8KdAI+eCmlNK7A8ZLPmDkhsUx2pHmwbZnNP5:WfSR8GA0Cv7rZLuisUxkGwRNP

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
748	sh
762	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	.5r3fqt67ew531has4231.mpsl.elf
File opened for modification	/dev/misc/watchdog	.5r3fqt67ew531has4231.mpsl.elf

Changes its process name 1 IoCs

description	ioc	pid	Process
Changes the process name, possibly in an attempt to hide itself	/bin/watchdog	746	.5r3fqt67ew531has4231.mpsl.elf

Reads runtime system information 3 IoCs

Reads data from /proc virtual filesystem.

discovery

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

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/.5r3fqt67ew531has4231.mpsl.elf
/tmp/.5r3fqt67ew531has4231.mpsl.elf
1⤵
- Modifies Watchdog functionality
- Changes its process name
- Reads runtime system information
PID:746
- /bin/sh
  sh -c "rm -rf bin/watchdog && mkdir bin; >bin/watchdog && mv /tmp/.5r3fqt67ew531has4231.mpsl.elf bin/watchdog; chmod 777 bin/watchdog"
  2⤵
  - File and Directory Permissions Modification
  - Writes file to tmp directory
  PID:748
- - /usr/bin/rm
    rm -rf bin/watchdog
    3⤵
    PID:751
- - /usr/bin/mkdir
    mkdir bin
    3⤵
    - Reads runtime system information
    PID:753
- - /usr/bin/mv
    mv /tmp/.5r3fqt67ew531has4231.mpsl.elf bin/watchdog
    3⤵
    - Reads runtime system information
    PID:757
- - /usr/bin/chmod
    chmod 777 bin/watchdog
    3⤵
    - File and Directory Permissions Modification
    PID:762

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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