bd7ece4dc5ae0a02380aae181da4b27fffd793356e324ba74ba0a961e2abfb84

Analysis

max time kernel
150s
max time network
159s
platform
debian-12_armhf
resource
debian12-armhf-20240221-en
resource tags

arch:armhfimage:debian12-armhf-20240221-enkernel:6.1.0-17-armmp-lpaelocale:en-usos:debian-12-armhfsystem
submitted
30-08-2024 21:35

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General

Target

bin.sh
Size

300KB
MD5

eec5c6c219535fba3a0492ea8118b397
SHA1

292559e94f1c04b7d0c65d4a01bbbc5dc1ff6f21
SHA256

12013662c71da69de977c04cd7021f13a70cf7bed4ca6c82acbc100464d4b0ef
SHA512

3482c8324a18302f0f37b6e23ed85f24fff9f50bb568d8fd7461bf57f077a7c592f7a88bb2e1c398699958946d87bb93ab744d13a0003f9b879c15e6471f7400
SSDEEP

6144:T2s/gAWuboqsJ9xcJxspJBqQgTuaJZRhVabE5wKSDP99zBa77oNsKqqfPqOJ:T2s/bW+UmJqBxAuaPRhVabEDSDP99zBT

Score

9^/10

discovery persistence

Malware Config

Signatures

Contacts a large (7122) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046

Modifies Watchdog functionality 1 TTPs 2 IoCs

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

Impair Defenses

T1562

Processes:

bin.sh

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

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

Creates/modifies environment variables 1 TTPs 1 IoCs

Creating/modifying environment variables is a common persistence mechanism.

persistence

Hijack Execution Flow

T1574

Processes:

bin.sh

description	ioc	Process
File opened for modification	/etc/profile.d/gawk.sh	bin.sh

Enumerates active TCP sockets 1 TTPs 1 IoCs

Gets active TCP sockets from /proc virtual filesystem.

System Network Connections Discovery

T1049

Processes:

bin.sh

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

Processes:

bin.sh

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

Reads system routing table 1 TTPs 1 IoCs

Gets active network interfaces from /proc virtual filesystem.

System Network Configuration Discovery

T1016

Processes:

bin.sh

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

Write file to user bin folder 1 TTPs 1 IoCs

Hijack Execution Flow

T1574

Processes:

bin.sh

description	ioc	Process
File opened for modification	/usr/bin/gvmap.sh	bin.sh

Writes file to system bin folder 1 TTPs 2 IoCs

Hijack Execution Flow

T1574

Processes:

bin.sh

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

Modifies Bash startup script 1 TTPs 1 IoCs

persistence

Boot or Logon Autostart Execution

T1547

Processes:

bin.sh

description	ioc	Process
File opened for modification	/etc/profile.d/gawk.sh	bin.sh

Changes its process name 1 IoCs

Processes:

description	ioc	pid
Changes the process name, possibly in an attempt to hide itself	dropbear	719

Reads system network configuration 1 TTPs 3 IoCs

Uses contents of /proc filesystem to enumerate network settings.

System Network Configuration Discovery

T1016

Processes:

bin.sh

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.

Processes:

killallbin.sh

description	ioc	Process
File opened for reading	/proc/1	killall
File opened for reading	/proc/28/stat	killall
File opened for reading	/proc/33/stat	killall
File opened for reading	/proc/250/stat	killall
File opened for reading	/proc/341	killall
File opened for reading	/proc/440	killall
File opened for reading	/proc/10/stat	killall
File opened for reading	/proc/14/stat	killall
File opened for reading	/proc/30/stat	killall
File opened for reading	/proc/47/stat	killall
File opened for reading	/proc/26/stat	killall
File opened for reading	/proc/712	killall
File opened for reading	/proc/stat	bin.sh
File opened for reading	/proc/344/stat	killall
File opened for reading	/proc/686	killall
File opened for reading	/proc/710	killall
File opened for reading	/proc/18/stat	killall
File opened for reading	/proc/23/stat	killall
File opened for reading	/proc/52/stat	killall
File opened for reading	/proc/339/stat	killall
File opened for reading	/proc/714	killall
File opened for reading	/proc/727	killall
File opened for reading	/proc/31/stat	killall
File opened for reading	/proc/33	killall
File opened for reading	/proc/43	killall
File opened for reading	/proc/45	killall
File opened for reading	/proc/560/stat	killall
File opened for reading	/proc/709	killall
File opened for reading	/proc/12	killall
File opened for reading	/proc/144/cmdline	killall
File opened for reading	/proc/339	killall
File opened for reading	/proc/560	killall
File opened for reading	/proc/317	killall
File opened for reading	/proc/1/stat	killall
File opened for reading	/proc/29/stat	killall
File opened for reading	/proc/32	killall
File opened for reading	/proc/32/stat	killall
File opened for reading	/proc/4	killall
File opened for reading	/proc/74	killall
File opened for reading	/proc/685	killall
File opened for reading	/proc/222/stat	killall
File opened for reading	/proc/309	killall
File opened for reading	/proc/690	killall
File opened for reading	/proc/5	killall
File opened for reading	/proc/11/stat	killall
File opened for reading	/proc/20	killall
File opened for reading	/proc/74/stat	killall
File opened for reading	/proc/10	killall
File opened for reading	/proc/17	killall
File opened for reading	/proc/24/stat	killall
File opened for reading	/proc/440/stat	killall
File opened for reading	/proc/441	killall
File opened for reading	/proc/666	killall
File opened for reading	/proc/720/stat	killall
File opened for reading	/proc/mounts	bin.sh
File opened for reading	/proc/46/stat	killall
File opened for reading	/proc/52	killall
File opened for reading	/proc/318	killall
File opened for reading	/proc/324	killall
File opened for reading	/proc/35	killall
File opened for reading	/proc/187	killall
File opened for reading	/proc/688	killall
File opened for reading	/proc/15/stat	killall
File opened for reading	/proc/16/stat	killall

Writes file to tmp directory 2 IoCs

Malware often drops required files in the /tmp directory.

Processes:

bin.sh

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
- Creates/modifies environment variables
- Enumerates active TCP sockets
- Modifies init.d
- Reads system routing table
- Write file to user bin folder
- Writes file to system bin folder
- Modifies Bash startup script
- Reads system network configuration
- Reads runtime system information
- Writes file to tmp directory
PID:711
- /bin/sh
  /bin/sh -c "killall -9 telnetd utelnetd scfgmgr"
  2⤵
  PID:720
- - /usr/bin/killall
    killall -9 telnetd utelnetd scfgmgr
    3⤵
    - Reads runtime system information
    PID:726
- /bin/sh
  /bin/sh -c "iptables -I INPUT -p tcp --destination-port 52955 -j ACCEPT"
  2⤵
  PID:775
- /bin/sh
  /bin/sh -c "iptables -I OUTPUT -p tcp --source-port 52955 -j ACCEPT"
  2⤵
  PID:776
- /bin/sh
  /bin/sh -c "iptables -I PREROUTING -t nat -p tcp --destination-port 52955 -j ACCEPT"
  2⤵
  PID:777
- /bin/sh
  /bin/sh -c "iptables -I POSTROUTING -t nat -p tcp --source-port 52955 -j ACCEPT"
  2⤵
  PID:778
- /bin/sh
  /bin/sh -c "iptables -I INPUT -p tcp --dport 52955 -j ACCEPT"
  2⤵
  PID:779
- /bin/sh
  /bin/sh -c "iptables -I OUTPUT -p tcp --sport 52955 -j ACCEPT"
  2⤵
  PID:780
- /bin/sh
  /bin/sh -c "iptables -I PREROUTING -t nat -p tcp --dport 52955 -j ACCEPT"
  2⤵
  PID:781
- /bin/sh
  /bin/sh -c "iptables -I POSTROUTING -t nat -p tcp --sport 52955 -j ACCEPT"
  2⤵
  PID:782
- /bin/sh
  /bin/sh -c "iptables -I INPUT -p tcp --destination-port 58000 -j DROP"
  2⤵
  PID:783
- /bin/sh
  /bin/sh -c "iptables -I OUTPUT -p tcp --source-port 58000 -j DROP"
  2⤵
  PID:786
- /bin/sh
  /bin/sh -c "iptables -I INPUT -p tcp --dport 58000 -j DROP"
  2⤵
  PID:787
- /bin/sh
  /bin/sh -c "iptables -I OUTPUT -p tcp --sport 58000 -j DROP"
  2⤵
  PID:788
- /bin/sh
  /bin/sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer URL \"http://127.0.0.1\""
  2⤵
  PID:789
- /bin/sh
  /bin/sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer ConnectionRequestPassword \"acsMozi\""
  2⤵
  PID:790
- /bin/sh
  /bin/sh -c "iptables -I INPUT -p tcp --destination-port 35000 -j DROP"
  2⤵
  PID:791
- /bin/sh
  /bin/sh -c "iptables -I INPUT -p tcp --destination-port 50023 -j DROP"
  2⤵
  PID:792
- /bin/sh
  /bin/sh -c "iptables -I OUTPUT -p tcp --source-port 50023 -j DROP"
  2⤵
  PID:793
- /bin/sh
  /bin/sh -c "iptables -I OUTPUT -p tcp --source-port 35000 -j DROP"
  2⤵
  PID:794
- /bin/sh
  /bin/sh -c "iptables -I INPUT -p tcp --destination-port 7547 -j DROP"
  2⤵
  PID:795
- /bin/sh
  /bin/sh -c "iptables -I OUTPUT -p tcp --source-port 7547 -j DROP"
  2⤵
  PID:796
- /bin/sh
  /bin/sh -c "iptables -I INPUT -p tcp --dport 35000 -j DROP"
  2⤵
  PID:797
- /bin/sh
  /bin/sh -c "iptables -I INPUT -p tcp --dport 50023 -j DROP"
  2⤵
  PID:798
- /bin/sh
  /bin/sh -c "iptables -I OUTPUT -p tcp --sport 50023 -j DROP"
  2⤵
  PID:799
- /bin/sh
  /bin/sh -c "iptables -I OUTPUT -p tcp --sport 35000 -j DROP"
  2⤵
  PID:800
- /bin/sh
  /bin/sh -c "iptables -I INPUT -p tcp --dport 7547 -j DROP"
  2⤵
  PID:801
- /bin/sh
  /bin/sh -c "iptables -I OUTPUT -p tcp --sport 7547 -j DROP"
  2⤵
  PID:802
- /bin/sh
  /bin/sh -c "iptables -I INPUT -p udp --destination-port 35075 -j ACCEPT"
  2⤵
  PID:803
- /bin/sh
  /bin/sh -c "iptables -I OUTPUT -p udp --source-port 35075 -j ACCEPT"
  2⤵
  PID:804
- /bin/sh
  /bin/sh -c "iptables -I PREROUTING -t nat -p udp --destination-port 35075 -j ACCEPT"
  2⤵
  PID:805
- /bin/sh
  /bin/sh -c "iptables -I POSTROUTING -t nat -p udp --source-port 35075 -j ACCEPT"
  2⤵
  PID:806
- /bin/sh
  /bin/sh -c "iptables -I INPUT -p udp --dport 35075 -j ACCEPT"
  2⤵
  PID:807
- /bin/sh
  /bin/sh -c "iptables -I OUTPUT -p udp --sport 35075 -j ACCEPT"
  2⤵
  PID:808
- /bin/sh
  /bin/sh -c "iptables -I PREROUTING -t nat -p udp --dport 35075 -j ACCEPT"
  2⤵
  PID:809
- /bin/sh
  /bin/sh -c "iptables -I POSTROUTING -t nat -p udp --sport 35075 -j ACCEPT"
  2⤵
  PID:810

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

Replay Monitor

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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
140B

MD5
457412db2275c971a2f32aef0c05f0ef

SHA1
81634d651b7bd25434966cb91dd5f1f1683ae363

SHA256
348a557ecef7585e315fa04bea4a179b715c795993ca331fbaf3677c79e0be5e

SHA512
4bf11f480c43a51666b8ddb335c59159c142299995ef5aad0cabe266e9652482f3032759150d6c467494ac10e7210976a935b61642cb214a438be016a7244a2c

Download Submit
/tmp/.config

Filesize
150B

MD5
83a8690fccbe0604585559ef1a9f8fe3

SHA1
62beaaf0e86e517e8e6da059ba063eb58958a205

SHA256
f53d6155f670e52be7bca53f09e798661c23fb39178da2460928fe1ce9a80f7d

SHA512
9f1780a7c868018d295933a585f0a82799dd6cdba6b3d22f38c77baf3dc44ed5df4955d6c338a3c92892f4159bde2040c96530a1a1bbb61376186c932ed268bb

Download Submit
/usr/networks

Filesize
300KB

MD5
eec5c6c219535fba3a0492ea8118b397

SHA1
292559e94f1c04b7d0c65d4a01bbbc5dc1ff6f21

SHA256
12013662c71da69de977c04cd7021f13a70cf7bed4ca6c82acbc100464d4b0ef

SHA512
3482c8324a18302f0f37b6e23ed85f24fff9f50bb568d8fd7461bf57f077a7c592f7a88bb2e1c398699958946d87bb93ab744d13a0003f9b879c15e6471f7400

Download Submit