c551c9b232e01e120cea46d2276f3f92d5cfd492596eebf73fc6db9be119f27b

Analysis

max time kernel
67s
max time network
158s
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
11/12/2024, 03:26

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General

Target

c551c9b232e01e120cea46d2276f3f92d5cfd492596eebf73fc6db9be119f27b.elf
Size

185KB
MD5

0803a1adcda8496063056fff664b52c5
SHA1

9360e5aaf48c5ca30d19758ed84fb080720a0825
SHA256

c551c9b232e01e120cea46d2276f3f92d5cfd492596eebf73fc6db9be119f27b
SHA512

200cc962430df1ae704dd0199ea426a9ea6fb36e16283194c07f1a75e4f778e74a92a8469a5166a80d082c10f4f2c523acb99c265e86e8823b1ec71164aeb7bd
SSDEEP

3072:aCwnsURFvwaN2q2PxGREb4cywoNKcayU9HlSgu4+wbZno:aC0tmbPkSb4cnoNKuU9HlPu/wRo

Score

9^/10

defense_evasion discovery

Malware Config

Signatures

Contacts a large (118125) 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

pid	Process
650	sh
663	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	c551c9b232e01e120cea46d2276f3f92d5cfd492596eebf73fc6db9be119f27b.elf
File opened for modification	/dev/misc/watchdog	c551c9b232e01e120cea46d2276f3f92d5cfd492596eebf73fc6db9be119f27b.elf

Changes its process name 1 IoCs

description	ioc	pid	Process
Changes the process name, possibly in an attempt to hide itself	/bin/busybox	649	c551c9b232e01e120cea46d2276f3f92d5cfd492596eebf73fc6db9be119f27b.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	c551c9b232e01e120cea46d2276f3f92d5cfd492596eebf73fc6db9be119f27b.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/busybox	sh

/tmp/c551c9b232e01e120cea46d2276f3f92d5cfd492596eebf73fc6db9be119f27b.elf
/tmp/c551c9b232e01e120cea46d2276f3f92d5cfd492596eebf73fc6db9be119f27b.elf
1⤵
- Modifies Watchdog functionality
- Changes its process name
- Reads runtime system information
PID:649
- /bin/sh
  sh -c "rm -rf bin/busybox && mkdir bin; >bin/busybox && mv /tmp/c551c9b232e01e120cea46d2276f3f92d5cfd492596eebf73fc6db9be119f27b.elf bin/busybox; chmod 777 bin/busybox"
  2⤵
  - File and Directory Permissions Modification
  - Writes file to tmp directory
  PID:650
- - /bin/rm
    rm -rf bin/busybox
    3⤵
    PID:651
- - /bin/mkdir
    mkdir bin
    3⤵
    - Reads runtime system information
    PID:657
- - /bin/mv
    mv /tmp/c551c9b232e01e120cea46d2276f3f92d5cfd492596eebf73fc6db9be119f27b.elf bin/busybox
    3⤵
    - Reads runtime system information
    PID:659
- - /bin/chmod
    chmod 777 bin/busybox
    3⤵
    - File and Directory Permissions Modification
    PID:663

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

Network Service Discovery

T1046

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Windows 7 deprecation

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