b5cf68c7cb5bb2d21d60bf6654926f61566d95bfd7c9f9e182d032f1da5b4605

Analysis

max time kernel
117s
max time network
150s
platform
debian-9_mips
resource
debian9-mipsbe-20240611-en
resource tags

arch:mipsimage:debian9-mipsbe-20240611-enkernel:4.9.0-13-4kc-maltalocale:en-usos:debian-9-mipssystem
submitted
18/08/2024, 19:24

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General

Target

bin.sh
Size

132KB
MD5

a73ddd6ec22462db955439f665cad4e6
SHA1

ac6962542a4b23ac13bddff22f8df9aeb702ef12
SHA256

b5cf68c7cb5bb2d21d60bf6654926f61566d95bfd7c9f9e182d032f1da5b4605
SHA512

92a52f68a7324c4d5876e1f7e2cb87d14b8604b057ceee2e537815568faa96abf576a22111c5c976eff72ab9015f1261b2331d4b4d711f4e62c8eb403c2377aa
SSDEEP

3072:2glZ3FtCKXhkmHtZ9TEKzjfj/WMngyIfsJ0F7xPtoM:2IIKXhZtL7jOTyIG87Xl

Score

9^/10

discovery persistence upx

Malware Config

Signatures

Contacts a large (10563) 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

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	Process
File opened for modification	/dev/watchdog	bin.sh
File opened for modification	/dev/misc/watchdog	bin.sh

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	bin.sh

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

Reads system routing table 1 TTPs 1 IoCs

Gets active network interfaces from /proc virtual filesystem.

System Network Configuration Discovery

T1016

description	ioc	Process
File opened for reading	/proc/net/route	bin.sh

Writes file to system bin folder 1 TTPs 2 IoCs

Hijack Execution Flow

T1574

description	ioc	Process
File opened for modification	/sbin/watchdog	bin.sh
File opened for modification	/bin/watchdog	bin.sh

Changes its process name 1 IoCs

description	ioc	pid
Changes the process name, possibly in an attempt to hide itself	sshd	709

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	bin.sh
File opened for reading	/proc/net/raw	bin.sh
File opened for reading	/proc/net/route	bin.sh

Reads runtime system information 64 IoCs

Reads data from /proc virtual filesystem.

description	ioc	Process
File opened for reading	/proc/715/stat	killall
File opened for reading	/proc/8/stat	killall
File opened for reading	/proc/12/stat	killall
File opened for reading	/proc/37/stat	killall
File opened for reading	/proc/76/stat	killall
File opened for reading	/proc/116/stat	killall
File opened for reading	/proc/21/stat	killall
File opened for reading	/proc/115/stat	killall
File opened for reading	/proc/373/stat	killall
File opened for reading	/proc/699/cmdline	killall
File opened for reading	/proc/487/stat	killall
File opened for reading	/proc/711/stat	killall
File opened for reading	/proc/self/exe	bin.sh
File opened for reading	/proc/2/stat	killall
File opened for reading	/proc/5/stat	killall
File opened for reading	/proc/7/stat	killall
File opened for reading	/proc/17/stat	killall
File opened for reading	/proc/6/stat	killall
File opened for reading	/proc/10/stat	killall
File opened for reading	/proc/74/stat	killall
File opened for reading	/proc/77/stat	killall
File opened for reading	/proc/80/stat	killall
File opened for reading	/proc/319/stat	killall
File opened for reading	/proc/14/stat	killall
File opened for reading	/proc/72/stat	killall
File opened for reading	/proc/326/stat	killall
File opened for reading	/proc/386/stat	killall
File opened for reading	/proc/521/stat	killall
File opened for reading	/proc/filesystems	killall
File opened for reading	/proc/1/stat	killall
File opened for reading	/proc/71/stat	killall
File opened for reading	/proc/144/stat	killall
File opened for reading	/proc/324/stat	killall
File opened for reading	/proc/13/stat	killall
File opened for reading	/proc/229/stat	killall
File opened for reading	/proc/698/cmdline	killall
File opened for reading	/proc/709/stat	killall
File opened for reading	/proc/18/stat	killall
File opened for reading	/proc/75/stat	killall
File opened for reading	/proc/81/stat	killall
File opened for reading	/proc/149/stat	killall
File opened for reading	/proc/402/stat	killall
File opened for reading	/proc/710/stat	killall
File opened for reading	/proc/20/stat	killall
File opened for reading	/proc/24/stat	killall
File opened for reading	/proc/683/stat	killall
File opened for reading	/proc/698/stat	killall
File opened for reading	/proc/705/stat	killall
File opened for reading	/proc/11/stat	killall
File opened for reading	/proc/23/stat	killall
File opened for reading	/proc/mounts	bin.sh
File opened for reading	/proc/16/stat	killall
File opened for reading	/proc/22/stat	killall
File opened for reading	/proc/374/stat	killall
File opened for reading	/proc/520/stat	killall
File opened for reading	/proc/699/stat	killall
File opened for reading	/proc/320/stat	killall
File opened for reading	/proc/9/stat	killall
File opened for reading	/proc/78/stat	killall
File opened for reading	/proc/116/cmdline	killall
File opened for reading	/proc/166/stat	killall
File opened for reading	/proc/317/stat	killall
File opened for reading	/proc/3/stat	killall
File opened for reading	/proc/15/stat	killall

Writes file to tmp directory 2 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/.ips	bin.sh
File opened for modification	/tmp/.config	bin.sh

/tmp/bin.sh
/tmp/bin.sh
1⤵
- Modifies Watchdog functionality
- Enumerates active TCP sockets
- Modifies init.d
- Reads system routing table
- Writes file to system bin folder
- Reads system network configuration
- Reads runtime system information
- Writes file to tmp directory
PID:706
- /bin/sh
  sh -c "killall -9 telnetd utelnetd scfgmgr"
  2⤵
  PID:711
- - /usr/bin/killall
    killall -9 telnetd utelnetd scfgmgr
    3⤵
    - Reads runtime system information
    PID:714
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --destination-port 60515 -j ACCEPT"
  2⤵
  PID:743
- - /sbin/iptables
    iptables -I INPUT -p tcp --destination-port 60515 -j ACCEPT
    3⤵
    PID:744
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --source-port 60515 -j ACCEPT"
  2⤵
  PID:747
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --source-port 60515 -j ACCEPT
    3⤵
    PID:750
- /bin/sh
  sh -c "iptables -I PREROUTING -t nat -p tcp --destination-port 60515 -j ACCEPT"
  2⤵
  PID:751
- - /sbin/iptables
    iptables -I PREROUTING -t nat -p tcp --destination-port 60515 -j ACCEPT
    3⤵
    PID:752
- /bin/sh
  sh -c "iptables -I POSTROUTING -t nat -p tcp --source-port 60515 -j ACCEPT"
  2⤵
  PID:759
- - /sbin/iptables
    iptables -I POSTROUTING -t nat -p tcp --source-port 60515 -j ACCEPT
    3⤵
    PID:761
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --destination-port 22 -j DROP"
  2⤵
  PID:760
- - /sbin/iptables
    iptables -I INPUT -p tcp --destination-port 22 -j DROP
    3⤵
    PID:762
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --dport 60515 -j ACCEPT"
  2⤵
  PID:763
- - /sbin/iptables
    iptables -I INPUT -p tcp --dport 60515 -j ACCEPT
    3⤵
    PID:764
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --destination-port 23 -j DROP"
  2⤵
  PID:765
- - /sbin/iptables
    iptables -I INPUT -p tcp --destination-port 23 -j DROP
    3⤵
    PID:767
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --sport 60515 -j ACCEPT"
  2⤵
  PID:766
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --sport 60515 -j ACCEPT
    3⤵
    PID:768
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --destination-port 2323 -j DROP"
  2⤵
  PID:769
- - /sbin/iptables
    iptables -I INPUT -p tcp --destination-port 2323 -j DROP
    3⤵
    PID:771
- /bin/sh
  sh -c "iptables -I PREROUTING -t nat -p tcp --dport 60515 -j ACCEPT"
  2⤵
  PID:770
- - /sbin/iptables
    iptables -I PREROUTING -t nat -p tcp --dport 60515 -j ACCEPT
    3⤵
    PID:772
- /bin/sh
  sh -c "iptables -I POSTROUTING -t nat -p tcp --sport 60515 -j ACCEPT"
  2⤵
  PID:773
- - /sbin/iptables
    iptables -I POSTROUTING -t nat -p tcp --sport 60515 -j ACCEPT
    3⤵
    PID:775
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --source-port 22 -j DROP"
  2⤵
  PID:774
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --source-port 22 -j DROP
    3⤵
    PID:776
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --source-port 23 -j DROP"
  2⤵
  PID:777
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --source-port 23 -j DROP
    3⤵
    PID:778
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --source-port 2323 -j DROP"
  2⤵
  PID:779
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --source-port 2323 -j DROP
    3⤵
    PID:780
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --dport 22 -j DROP"
  2⤵
  PID:784
- - /sbin/iptables
    iptables -I INPUT -p tcp --dport 22 -j DROP
    3⤵
    PID:785
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --dport 23 -j DROP"
  2⤵
  PID:786
- - /sbin/iptables
    iptables -I INPUT -p tcp --dport 23 -j DROP
    3⤵
    PID:787
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --dport 2323 -j DROP"
  2⤵
  PID:788
- - /sbin/iptables
    iptables -I INPUT -p tcp --dport 2323 -j DROP
    3⤵
    PID:789
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --sport 22 -j DROP"
  2⤵
  PID:790
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --sport 22 -j DROP
    3⤵
    PID:791
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --sport 23 -j DROP"
  2⤵
  PID:792
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --sport 23 -j DROP
    3⤵
    PID:793
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --sport 2323 -j DROP"
  2⤵
  PID:794
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --sport 2323 -j DROP
    3⤵
    PID:795
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --destination-port 58000 -j DROP"
  2⤵
  PID:796
- - /sbin/iptables
    iptables -I INPUT -p tcp --destination-port 58000 -j DROP
    3⤵
    PID:797
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --source-port 58000 -j DROP"
  2⤵
  PID:798
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --source-port 58000 -j DROP
    3⤵
    PID:799
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --dport 58000 -j DROP"
  2⤵
  PID:800
- - /sbin/iptables
    iptables -I INPUT -p tcp --dport 58000 -j DROP
    3⤵
    PID:801
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --sport 58000 -j DROP"
  2⤵
  PID:802
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --sport 58000 -j DROP
    3⤵
    PID:803
- /bin/sh
  sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer URL \"http://127.0.0.1\""
  2⤵
  PID:804
- /bin/sh
  sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer ConnectionRequestPassword \"acsMozi\""
  2⤵
  PID:805
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --destination-port 35000 -j DROP"
  2⤵
  PID:806
- - /sbin/iptables
    iptables -I INPUT -p tcp --destination-port 35000 -j DROP
    3⤵
    PID:807
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --destination-port 50023 -j DROP"
  2⤵
  PID:810
- - /sbin/iptables
    iptables -I INPUT -p tcp --destination-port 50023 -j DROP
    3⤵
    PID:811
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --source-port 50023 -j DROP"
  2⤵
  PID:812
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --source-port 50023 -j DROP
    3⤵
    PID:813
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --source-port 35000 -j DROP"
  2⤵
  PID:815
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --source-port 35000 -j DROP
    3⤵
    PID:817
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --destination-port 7547 -j DROP"
  2⤵
  PID:818
- - /sbin/iptables
    iptables -I INPUT -p tcp --destination-port 7547 -j DROP
    3⤵
    PID:819
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --source-port 7547 -j DROP"
  2⤵
  PID:821
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --source-port 7547 -j DROP
    3⤵
    PID:822
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --dport 35000 -j DROP"
  2⤵
  PID:824
- - /sbin/iptables
    iptables -I INPUT -p tcp --dport 35000 -j DROP
    3⤵
    PID:825
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --dport 50023 -j DROP"
  2⤵
  PID:826
- - /sbin/iptables
    iptables -I INPUT -p tcp --dport 50023 -j DROP
    3⤵
    PID:827
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --sport 50023 -j DROP"
  2⤵
  PID:829
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --sport 50023 -j DROP
    3⤵
    PID:831
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --sport 35000 -j DROP"
  2⤵
  PID:832
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --sport 35000 -j DROP
    3⤵
    PID:833
- /bin/sh
  sh -c "iptables -I INPUT -p tcp --dport 7547 -j DROP"
  2⤵
  PID:835
- - /sbin/iptables
    iptables -I INPUT -p tcp --dport 7547 -j DROP
    3⤵
    PID:836
- /bin/sh
  sh -c "iptables -I OUTPUT -p tcp --sport 7547 -j DROP"
  2⤵
  PID:838
- - /sbin/iptables
    iptables -I OUTPUT -p tcp --sport 7547 -j DROP
    3⤵
    PID:839
- /bin/sh
  sh -c "iptables -I INPUT -p udp --destination-port 22947 -j ACCEPT"
  2⤵
  PID:854
- - /sbin/iptables
    iptables -I INPUT -p udp --destination-port 22947 -j ACCEPT
    3⤵
    PID:855
- /bin/sh
  sh -c "iptables -I OUTPUT -p udp --source-port 22947 -j ACCEPT"
  2⤵
  PID:857
- - /sbin/iptables
    iptables -I OUTPUT -p udp --source-port 22947 -j ACCEPT
    3⤵
    PID:858
- /bin/sh
  sh -c "iptables -I PREROUTING -t nat -p udp --destination-port 22947 -j ACCEPT"
  2⤵
  PID:860
- - /sbin/iptables
    iptables -I PREROUTING -t nat -p udp --destination-port 22947 -j ACCEPT
    3⤵
    PID:861
- /bin/sh
  sh -c "iptables -I POSTROUTING -t nat -p udp --source-port 22947 -j ACCEPT"
  2⤵
  PID:862
- - /sbin/iptables
    iptables -I POSTROUTING -t nat -p udp --source-port 22947 -j ACCEPT
    3⤵
    PID:863
- /bin/sh
  sh -c "iptables -I INPUT -p udp --dport 22947 -j ACCEPT"
  2⤵
  PID:865
- - /sbin/iptables
    iptables -I INPUT -p udp --dport 22947 -j ACCEPT
    3⤵
    PID:867
- /bin/sh
  sh -c "iptables -I OUTPUT -p udp --sport 22947 -j ACCEPT"
  2⤵
  PID:868
- - /sbin/iptables
    iptables -I OUTPUT -p udp --sport 22947 -j ACCEPT
    3⤵
    PID:869
- /bin/sh
  sh -c "iptables -I PREROUTING -t nat -p udp --dport 22947 -j ACCEPT"
  2⤵
  PID:870
- - /sbin/iptables
    iptables -I PREROUTING -t nat -p udp --dport 22947 -j ACCEPT
    3⤵
    PID:872
- /bin/sh
  sh -c "iptables -I POSTROUTING -t nat -p udp --sport 22947 -j ACCEPT"
  2⤵
  PID:875
- - /sbin/iptables
    iptables -I POSTROUTING -t nat -p udp --sport 22947 -j ACCEPT
    3⤵
    PID:877

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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/tmp/.config

Filesize
147B

MD5
b8a8f466da2abb274b5da8a184d10172

SHA1
2444c38c3462702bf815cf4e37100214824b76e6

SHA256
74c9b3a712c3e883f3d0181d64bb83d4aa02f1619615f4f584441e4ae4de0936

SHA512
33dfaaae402915c324acb901a94deac1c6f4b2773bdd9fc5e61fed5fd848570a699abcf3f178f8c2b2bdf527dd10a40edaefbe43b94f6e2f1d8e69ebd681768f

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/usr/networks

Filesize
132KB

MD5
a73ddd6ec22462db955439f665cad4e6

SHA1
ac6962542a4b23ac13bddff22f8df9aeb702ef12

SHA256
b5cf68c7cb5bb2d21d60bf6654926f61566d95bfd7c9f9e182d032f1da5b4605

SHA512
92a52f68a7324c4d5876e1f7e2cb87d14b8604b057ceee2e537815568faa96abf576a22111c5c976eff72ab9015f1261b2331d4b4d711f4e62c8eb403c2377aa

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads