d546509ab6670f9ff31783ed72875dfc0f37fa2b666bd5870eecaaed2ebea4a8

Analysis

Target

Mozi.mgzrjnsnf
Size

106KB
MD5

4dde761681684d7edad4e5e1ffdb940b
SHA1

2327be693bc11a618c380d7d3abc2382d870d48b
SHA256

d546509ab6670f9ff31783ed72875dfc0f37fa2b666bd5870eecaaed2ebea4a8
SHA512

91a61c719128f263f9f95736d55895954cc468c74ff469ee061d35ec382c50b9165e9a5427dc46a835dac6ae0e6e1f9819632475f68b98a907b53196bd4eb02a

Score

9^/10

Modifies the Watchdog daemon 1 TTPs
Malware like Mirai modify the Watchdog to prevent it restarting an infected system.

Impair Defenses
T1562

Writes file to system bin folder 1 TTPs 2 IoCs

Hijack Execution Flow

Processes:

description	ioc
/sbin/watchdog	/sbin/watchdog
/bin/watchdog	/bin/watchdog

Modifies hosts file 1 IoCs

Adds to hosts file used for mapping hosts to IP addresses.

Processes:

description	ioc
/etc/hosts	/etc/hosts

Enumerates active TCP sockets 1 TTPs 1 IoCs

Gets active TCP sockets from /proc virtual filesystem.

System Network Connections Discovery

Processes:

description	ioc
/proc/net/tcp	/proc/net/tcp

Reads system network configuration 1 TTPs 2 IoCs

Uses contents of /proc filesystem to enumerate network settings.

System Network Configuration Discovery

Processes:

description	ioc
/proc/net/raw	/proc/net/raw
/proc/net/tcp	/proc/net/tcp

Writes file to tmp directory 2 IoCs

Malware often drops required files in the /tmp directory.

Processes:

description	ioc
/tmp/Mozi.mgzrjnsnf	/tmp/Mozi.mgzrjnsnf
/tmp/config	/tmp/config

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 22 -j DROP"
1⤵
PID:338
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 22 -j DROP
  2⤵
  PID:339

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 60907 -j ACCEPT"
1⤵
PID:340
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 60907 -j ACCEPT
  2⤵
  PID:345

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 23 -j DROP"
1⤵
PID:349
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 23 -j DROP
  2⤵
  PID:350

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 2323 -j DROP"
1⤵
PID:351
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 2323 -j DROP
  2⤵
  PID:352

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 22 -j DROP"
1⤵
PID:353
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 22 -j DROP
  2⤵
  PID:354

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 60907 -j ACCEPT"
1⤵
PID:355
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 60907 -j ACCEPT
  2⤵
  PID:356

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 23 -j DROP"
1⤵
PID:357
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 23 -j DROP
  2⤵
  PID:358

/bin/sh
sh -c "iptables -I PREROUTING -t nat -p tcp --destination-port 60907 -j ACCEPT"
1⤵
PID:359
- /sbin/iptables
  iptables -I PREROUTING -t nat -p tcp --destination-port 60907 -j ACCEPT
  2⤵
  PID:361

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 2323 -j DROP"
1⤵
PID:360
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 2323 -j DROP
  2⤵
  PID:362