6a9f18f06cff43ca4a84231ec05cd0f13b72fc250bb75ccda4ace60c2c2dcb75

Analysis

max time kernel
73s
max time network
155s
platform
debian-9_mips
resource
debian9-mipsbe-20240226-en
resource tags

arch:mipsimage:debian9-mipsbe-20240226-enkernel:4.9.0-13-4kc-maltalocale:en-usos:debian-9-mipssystem
submitted
06/03/2024, 01:34

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General

Target

b62ef270df2cb46fb862130d270e5d84
Size

164KB
MD5

b62ef270df2cb46fb862130d270e5d84
SHA1

d298c1fd29a775989290e5b43ed5c9be3779eac6
SHA256

6a9f18f06cff43ca4a84231ec05cd0f13b72fc250bb75ccda4ace60c2c2dcb75
SHA512

6bec24e4a1faee4c9b1b79571004633b0d2d3c5d4570b7fdc85825be348ec84d9d2bda877c6ebd99aecfef42ecd2d38493d2764f6344e3bb5f3c777b0c2e73a3
SSDEEP

3072:phNlHuBafLeBtfCzpta8xlBIOdVo3/4sxLJ10xioiaabEtnwKSDP99w:p3lOYoaja8xzx/0wsxzSigabE5wKSDPo

Score

9^/10

discovery persistence upx

Malware Config

Signatures

Contacts a large (5984) 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-3.dat	patched_upx

Changes its process name 1 IoCs

description	ioc	pid
Changes the process name, possibly in an attempt to hide itself	sshd	699

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-3.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	b62ef270df2cb46fb862130d270e5d84

Enumerates running processes
Discovers information about currently running processes on the system

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

Reads system routing table 1 TTPs 1 IoCs

Gets active network interfaces from /proc virtual filesystem.

System Network Configuration Discovery

T1016

description	ioc
File opened for reading	/proc/net/route

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 3 IoCs

Uses contents of /proc filesystem to enumerate network settings.

System Network Configuration Discovery

T1016

description	ioc	Process
File opened for reading	/proc/net/tcp	b62ef270df2cb46fb862130d270e5d84
File opened for reading	/proc/net/raw	b62ef270df2cb46fb862130d270e5d84
File opened for reading	/proc/net/route	Process not Found

Reads runtime system information 64 IoCs

Reads data from /proc virtual filesystem.

description	ioc	Process
File opened for reading	/proc/72/stat	killall
File opened for reading	/proc/73/stat	killall
File opened for reading	/proc/241/stat	killall
File opened for reading	/proc/699/cmdline	killall
File opened for reading	/proc/filesystems	killall
File opened for reading	/proc/5/stat	killall
File opened for reading	/proc/17/stat	killall
File opened for reading	/proc/14/stat	killall
File opened for reading	/proc/37/stat	killall
File opened for reading	/proc/77/stat	killall
File opened for reading	/proc/389/stat	killall
File opened for reading	/proc/74/stat	killall
File opened for reading	/proc/115/stat	killall
File opened for reading	/proc/375/stat	killall
File opened for reading	/proc/504/stat	killall
File opened for reading	/proc/1/stat	killall
File opened for reading	/proc/3/stat	killall
File opened for reading	/proc/21/stat	killall
File opened for reading	/proc/692/stat	killall
File opened for reading	/proc/6/stat	killall
File opened for reading	/proc/22/stat	killall
File opened for reading	/proc/675/stat	killall
File opened for reading	/proc/336/stat	killall
File opened for reading	/proc/500/stat	killall
File opened for reading	/proc/689/cmdline	killall
File opened for reading	/proc/7/stat	killall
File opened for reading	/proc/114/stat	killall
File opened for reading	/proc/142/stat	killall
File opened for reading	/proc/690/cmdline	killall
File opened for reading	/proc/700/stat	killall
File opened for reading	/proc/36/stat	killall
File opened for reading	/proc/75/stat	killall
File opened for reading	/proc/376/stat	killall
File opened for reading	/proc/18/stat	killall
File opened for reading	/proc/80/stat	killall
File opened for reading	/proc/460/stat	killall
File opened for reading	/proc/9/stat	killall
File opened for reading	/proc/11/stat	killall
File opened for reading	/proc/15/stat	killall
File opened for reading	/proc/82/stat	killall
File opened for reading	/proc/115/cmdline	killall
File opened for reading	/proc/698/stat	killall
File opened for reading	/proc/2/stat	killall
File opened for reading	/proc/8/stat	killall
File opened for reading	/proc/79/stat	killall
File opened for reading	/proc/71/stat	killall
File opened for reading	/proc/335/stat	killall
File opened for reading	/proc/151/stat	killall
File opened for reading	/proc/467/stat	killall
File opened for reading	/proc/691/stat	killall
File opened for reading	/proc/330/stat	killall
File opened for reading	/proc/357/stat	killall
File opened for reading	/proc/690/stat	killall
File opened for reading	/proc/mounts	Process not Found
File opened for reading	/proc/23/stat	killall
File opened for reading	/proc/24/stat	killall
File opened for reading	/proc/70/stat	killall
File opened for reading	/proc/104/stat	killall
File opened for reading	/proc/142/cmdline	killall
File opened for reading	/proc/332/stat	killall
File opened for reading	/proc/699/stat	killall
File opened for reading	/proc/13/stat	killall
File opened for reading	/proc/19/stat	killall
File opened for reading	/proc/76/stat	killall

Writes file to tmp directory 1 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/.ips	b62ef270df2cb46fb862130d270e5d84

/tmp/b62ef270df2cb46fb862130d270e5d84
/tmp/b62ef270df2cb46fb862130d270e5d84
1⤵
- Enumerates active TCP sockets
- Reads system network configuration
- Writes file to tmp directory
PID:696

/bin/sh
sh -c "killall -9 telnetd utelnetd scfgmgr"
1⤵
PID:700
- /usr/bin/killall
  killall -9 telnetd utelnetd scfgmgr
  2⤵
  - Reads runtime system information
  PID:704

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 34811 -j ACCEPT"
1⤵
PID:737
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 34811 -j ACCEPT
  2⤵
  PID:738

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 34811 -j ACCEPT"
1⤵
PID:744
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 34811 -j ACCEPT
  2⤵
  PID:746

/bin/sh
sh -c "iptables -I PREROUTING -t nat -p tcp --destination-port 34811 -j ACCEPT"
1⤵
PID:747
- /sbin/iptables
  iptables -I PREROUTING -t nat -p tcp --destination-port 34811 -j ACCEPT
  2⤵
  PID:748

/bin/sh
sh -c "iptables -I POSTROUTING -t nat -p tcp --source-port 34811 -j ACCEPT"
1⤵
PID:757
- /sbin/iptables
  iptables -I POSTROUTING -t nat -p tcp --source-port 34811 -j ACCEPT
  2⤵
  PID:760

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 34811 -j ACCEPT"
1⤵
PID:761
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 34811 -j ACCEPT
  2⤵
  PID:762

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 22 -j DROP"
1⤵
PID:763
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 22 -j DROP
  2⤵
  PID:764

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 34811 -j ACCEPT"
1⤵
PID:765
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 34811 -j ACCEPT
  2⤵
  PID:767

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 23 -j DROP"
1⤵
PID:768
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 23 -j DROP
  2⤵
  PID:769

/bin/sh
sh -c "iptables -I PREROUTING -t nat -p tcp --dport 34811 -j ACCEPT"
1⤵
PID:771
- /sbin/iptables
  iptables -I PREROUTING -t nat -p tcp --dport 34811 -j ACCEPT
  2⤵
  PID:772

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 2323 -j DROP"
1⤵
PID:773
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 2323 -j DROP
  2⤵
  PID:774

/bin/sh
sh -c "iptables -I POSTROUTING -t nat -p tcp --sport 34811 -j ACCEPT"
1⤵
PID:775
- /sbin/iptables
  iptables -I POSTROUTING -t nat -p tcp --sport 34811 -j ACCEPT
  2⤵
  PID:776

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 22 -j DROP"
1⤵
PID:777
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 22 -j DROP
  2⤵
  PID:779

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 23 -j DROP"
1⤵
PID:781
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 23 -j DROP
  2⤵
  PID:782

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 2323 -j DROP"
1⤵
PID:783
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 2323 -j DROP
  2⤵
  PID:784

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 22 -j DROP"
1⤵
PID:786
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 22 -j DROP
  2⤵
  PID:788

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 23 -j DROP"
1⤵
PID:789
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 23 -j DROP
  2⤵
  PID:790

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 2323 -j DROP"
1⤵
PID:795
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 2323 -j DROP
  2⤵
  PID:796

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 22 -j DROP"
1⤵
PID:798
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 22 -j DROP
  2⤵
  PID:799

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 23 -j DROP"
1⤵
PID:800
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 23 -j DROP
  2⤵
  PID:801

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 2323 -j DROP"
1⤵
PID:803
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 2323 -j DROP
  2⤵
  PID:804

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 58000 -j DROP"
1⤵
PID:806
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 58000 -j DROP
  2⤵
  PID:807

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 58000 -j DROP"
1⤵
PID:809
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 58000 -j DROP
  2⤵
  PID:810

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 58000 -j DROP"
1⤵
PID:812
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 58000 -j DROP
  2⤵
  PID:813

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 58000 -j DROP"
1⤵
PID:814
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 58000 -j DROP
  2⤵
  PID:816

/bin/sh
sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer URL \"http://127.0.0.1\""
1⤵
PID:817

/bin/sh
sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer ConnectionRequestPassword \"acsMozi\""
1⤵
PID:819

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 35000 -j DROP"
1⤵
PID:820
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 35000 -j DROP
  2⤵
  PID:821

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 50023 -j DROP"
1⤵
PID:822
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 50023 -j DROP
  2⤵
  PID:824

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 50023 -j DROP"
1⤵
PID:826
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 50023 -j DROP
  2⤵
  PID:827

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 35000 -j DROP"
1⤵
PID:828
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 35000 -j DROP
  2⤵
  PID:829

/bin/sh
sh -c "iptables -I INPUT -p tcp --destination-port 7547 -j DROP"
1⤵
PID:831
- /sbin/iptables
  iptables -I INPUT -p tcp --destination-port 7547 -j DROP
  2⤵
  PID:833

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --source-port 7547 -j DROP"
1⤵
PID:834
- /sbin/iptables
  iptables -I OUTPUT -p tcp --source-port 7547 -j DROP
  2⤵
  PID:835

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 35000 -j DROP"
1⤵
PID:836
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 35000 -j DROP
  2⤵
  PID:838

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 50023 -j DROP"
1⤵
PID:840
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 50023 -j DROP
  2⤵
  PID:841

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 50023 -j DROP"
1⤵
PID:842
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 50023 -j DROP
  2⤵
  PID:843

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 35000 -j DROP"
1⤵
PID:845
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 35000 -j DROP
  2⤵
  PID:848

/bin/sh
sh -c "iptables -I INPUT -p tcp --dport 7547 -j DROP"
1⤵
PID:851
- /sbin/iptables
  iptables -I INPUT -p tcp --dport 7547 -j DROP
  2⤵
  PID:852

/bin/sh
sh -c "iptables -I OUTPUT -p tcp --sport 7547 -j DROP"
1⤵
PID:853
- /sbin/iptables
  iptables -I OUTPUT -p tcp --sport 7547 -j DROP
  2⤵
  PID:854

/bin/sh
sh -c "iptables -I INPUT -p udp --destination-port 4000 -j ACCEPT"
1⤵
PID:869
- /sbin/iptables
  iptables -I INPUT -p udp --destination-port 4000 -j ACCEPT
  2⤵
  PID:870

/bin/sh
sh -c "iptables -I OUTPUT -p udp --source-port 4000 -j ACCEPT"
1⤵
PID:871
- /sbin/iptables
  iptables -I OUTPUT -p udp --source-port 4000 -j ACCEPT
  2⤵
  PID:872

/bin/sh
sh -c "iptables -I PREROUTING -t nat -p udp --destination-port 4000 -j ACCEPT"
1⤵
PID:873
- /sbin/iptables
  iptables -I PREROUTING -t nat -p udp --destination-port 4000 -j ACCEPT
  2⤵
  PID:874

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Hijack Execution Flow

T1574

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Hijack Execution Flow

T1574

Defense Evasion

Hijack Execution Flow

T1574

Impair Defenses

T1562

Credential Access

Discovery

Network Service Discovery

T1046

System Network Configuration Discovery

T1016

System Network Connections Discovery

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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/usr/networks

Filesize
164KB

MD5
b62ef270df2cb46fb862130d270e5d84

SHA1
d298c1fd29a775989290e5b43ed5c9be3779eac6

SHA256
6a9f18f06cff43ca4a84231ec05cd0f13b72fc250bb75ccda4ace60c2c2dcb75

SHA512
6bec24e4a1faee4c9b1b79571004633b0d2d3c5d4570b7fdc85825be348ec84d9d2bda877c6ebd99aecfef42ecd2d38493d2764f6344e3bb5f3c777b0c2e73a3

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads