bba18438991935a5fb91c8f315d08792c2326b2ce19f2be117f7dab984c47bdf

General

Target

635d926cace851bef7df910d8cb5f647
Size

120KB
MD5

635d926cace851bef7df910d8cb5f647
SHA1

543282811f7ec6ab8743f5ab877c040b16ed9a10
SHA256

bba18438991935a5fb91c8f315d08792c2326b2ce19f2be117f7dab984c47bdf
SHA512

859bd4682e06a511961de11cfe8e4f047a2ac5f85fc388df5108c8f5e0a0af628bb81e378958a32c8606ae50110020f7b8374de06dea1eccabbe89e213415209
SSDEEP

3072:6X8JNZXopYyKyI/LvKtL2faYk+djHdiDI0eXaBLTRP4otGP/x:6Xs4pYy6/LKR2SrsTkDI0eXaBBxwP5

Score

9^/10

discovery persistence upx

Malware Config

Signatures

Contacts a large (4772) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Patched UPX-packed file 1 IoCs

Sample is packed with UPX but required header fields are zeroed out to prevent unpacking with the default UPX tool.

resource	yara_rule
behavioral1/files/fstream-1.dat	patched_upx

Changes its process name 1 IoCs

description	ioc	pid	Process
Changes the process name, possibly in an attempt to hide itself	sshd	678	635d926cace851bef7df910d8cb5f647

Modifies Watchdog functionality 1 TTPs 2 IoCs

Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.

Impair Defenses

T1562

description	ioc
File opened for modification	/dev/watchdog
File opened for modification	/dev/misc/watchdog

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/fstream-1.dat	upx

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

Enumerates active TCP sockets 1 TTPs 1 IoCs

Gets active TCP sockets from /proc virtual filesystem.

System Network Connections Discovery

T1049

description	ioc	Process
File opened for reading	/proc/net/tcp	635d926cace851bef7df910d8cb5f647

Modifies init.d 1 TTPs 4 IoCs

Adds/modifies system service, likely for persistence.

persistence

Boot or Logon Autostart Execution

T1547

description	ioc
File opened for modification	/etc/init.d/keyboard-setup.sh
File opened for modification	/etc/init.d/hwclock.sh
File opened for modification	/etc/init.d/S95baby.sh
File opened for modification	/etc/init.d/console-setup.sh

Writes file to system bin folder 1 TTPs 2 IoCs

Hijack Execution Flow

T1574

description	ioc
File opened for modification	/sbin/watchdog
File opened for modification	/bin/watchdog

Reads system network configuration 1 TTPs 2 IoCs

Uses contents of /proc filesystem to enumerate network settings.

System Network Configuration Discovery

T1016

description	ioc	Process
File opened for reading	/proc/net/raw	635d926cace851bef7df910d8cb5f647
File opened for reading	/proc/net/tcp	635d926cace851bef7df910d8cb5f647

Writes file to tmp directory 1 IoCs

Malware often drops required files in the /tmp directory.

description	ioc
File opened for modification	/tmp/config

/tmp/635d926cace851bef7df910d8cb5f647
/tmp/635d926cace851bef7df910d8cb5f647
1⤵
- Changes its process name
- Enumerates active TCP sockets
- Reads system network configuration
PID:678
- /bin/sh
  sh -c "echo 3 > /proc/sys/vm/drop_caches"
  2⤵
  PID:679

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 58000 -j DROP"
1⤵
PID:691
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 58000 -j DROP
  2⤵
  PID:692

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 58000 -j DROP"
1⤵
PID:701
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 58000 -j DROP
  2⤵
  PID:702

/bin/sh
sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer URL \"http://127.0.0.1\""
1⤵
PID:703

/bin/sh
sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer ConnectionRequestPassword \"acsMozi\""
1⤵
PID:705

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 35000 -j DROP"
1⤵
PID:706
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 35000 -j DROP
  2⤵
  PID:707

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 50023 -j DROP"
1⤵
PID:708
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 50023 -j DROP
  2⤵
  PID:709

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 50023 -j DROP"
1⤵
PID:711
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 50023 -j DROP
  2⤵
  PID:713

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 50159 -j ACCEPT"
1⤵
PID:712
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 50159 -j ACCEPT
  2⤵
  PID:714

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 35000 -j DROP"
1⤵
PID:715
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 35000 -j DROP
  2⤵
  PID:716

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 7547 -j DROP"
1⤵
PID:717
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 7547 -j DROP
  2⤵
  PID:718

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 50159 -j ACCEPT"
1⤵
PID:719
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 50159 -j ACCEPT
  2⤵
  PID:720

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 7547 -j DROP"
1⤵
PID:721
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 7547 -j DROP
  2⤵
  PID:722

/bin/sh
sh -c "iptables -I PREROUTING -t nat -p tcp --destination-port 50159 -j ACCEPT"
1⤵
PID:723
- /sbin/iptables
  iptables -I PREROUTING -t nat -p tcp --destination-port 50159 -j ACCEPT
  2⤵
  PID:724

/bin/sh
sh -c "iptables -I POSTROUTING -t nat -p tcp --source-port 50159 -j ACCEPT"
1⤵
PID:729
- /sbin/iptables
  iptables -I POSTROUTING -t nat -p tcp --source-port 50159 -j ACCEPT
  2⤵
  PID:730

/bin/sh
sh -c "iptables -I INPUT -p udp --destination-port 8082 -j ACCEPT"
1⤵
PID:787
- /sbin/iptables
  iptables -I INPUT -p udp --destination-port 8082 -j ACCEPT
  2⤵
  PID:788

/bin/sh
sh -c "iptables -I OUTPUT -p udp --source-port 8082 -j ACCEPT"
1⤵
PID:789
- /sbin/iptables
  iptables -I OUTPUT -p udp --source-port 8082 -j ACCEPT
  2⤵
  PID:790

/bin/sh
sh -c "iptables -I PREROUTING -t nat -p udp --destination-port 8082 -j ACCEPT"
1⤵
PID:791
- /sbin/iptables
  iptables -I PREROUTING -t nat -p udp --destination-port 8082 -j ACCEPT
  2⤵
  PID:792

/bin/sh
sh -c "iptables -I POSTROUTING -t nat -p udp --source-port 8082 -j ACCEPT"
1⤵
PID:797
- /sbin/iptables
  iptables -I POSTROUTING -t nat -p udp --source-port 8082 -j ACCEPT
  2⤵
  PID:799

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Hijack Execution Flow

1

T1574

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Hijack Execution Flow

1

T1574

Defense Evasion

Hijack Execution Flow

Impair Defenses

Credential Access

Discovery

Network Service Discovery

2

T1046

System Network Configuration Discovery

1

T1016

System Network Connections Discovery

1

T1049

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

/etc/rcS.d/S95baby.sh

Filesize
25B

MD5
1b3235ba10fc04836c941d3d27301956

SHA1
8909655763143702430b8c58b3ae3b04cfd3a29c

SHA256
01ba1fb41632594997a41d0c3a911ae5b3034d566ebb991ef76ad76e6f9e283a

SHA512
98bdb5c266222ccbd63b6f80c87e501c8033dc53b0513d300b8da50e39a207a0b69f8cd3ecc4a128dec340a1186779fedd1049c9b0a70e90d2cb3ae6ebfa4c4d

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/tmp/config

Filesize
109B

MD5
18a576e4660c72d5d445c3896744f390

SHA1
84eb9170a0350ab5e6bcab6a82c83576be39b821

SHA256
2ae465a253f97dafe16afe0c8086676c2948f95b3d03a62da288ba9c7264353a

SHA512
f4bcf08b3e5f942db835c9457c80a6d79bc66bc593abf8e07721b96a78a31040ac9bc7fe66649778175e8348ba1a35af3dfadabd901313f77c893f34631aa862

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/usr/networks

Filesize
120KB

MD5
635d926cace851bef7df910d8cb5f647

SHA1
543282811f7ec6ab8743f5ab877c040b16ed9a10

SHA256
bba18438991935a5fb91c8f315d08792c2326b2ce19f2be117f7dab984c47bdf

SHA512
859bd4682e06a511961de11cfe8e4f047a2ac5f85fc388df5108c8f5e0a0af628bb81e378958a32c8606ae50110020f7b8374de06dea1eccabbe89e213415209

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads