Analysis
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max time kernel
99s -
max time network
155s -
platform
debian-9_mipsel -
resource
debian9-mipsel-20240226-en -
resource tags
arch:mipselimage:debian9-mipsel-20240226-enkernel:4.9.0-13-4kc-maltalocale:en-usos:debian-9-mipselsystem -
submitted
10-10-2024 06:58
Static task
static1
Behavioral task
behavioral1
Sample
7RBLN_na.elf
Resource
debian9-mipsel-20240226-en
General
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Target
7RBLN_na.elf
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Size
86KB
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MD5
fd2e100d5eb1c1f9d4ba81241c43620b
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SHA1
8114ab62d5314edb40383dcd849e38656f5dd888
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SHA256
d7b0dce26bb6d14f8d8a1867b714dc289273ab78b87ce66ba97b244b0468a4ce
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SHA512
df352dcc3769b399138185f8e864a5d33fc8c0b62715e2f3cb85963047a2ca6f72ad3e3c89c1d9ea3ee54af53b510432eee6d09594b35e5f603461596bc1f247
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SSDEEP
1536:S4Ors/hxsJ9Uz6/2IUqjzO7nixoFdZSsJcLNtn:SfA/hxsJCzCXUtFdFOn
Malware Config
Signatures
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Contacts a large (20380) 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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Deletes system logs 1 TTPs 2 IoCs
Deletes log file which contains global system messages. Adversaries may delete system logs to minimize their footprint.
Processes:
7RBLN_na.elfdescription ioc Process File deleted /var/log/syslog 7RBLN_na.elf File deleted /var/log/messages 7RBLN_na.elf -
Modifies Watchdog functionality 1 TTPs 2 IoCs
Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.
Processes:
7RBLN_na.elfdescription ioc Process File opened for modification /dev/misc/watchdog 7RBLN_na.elf File opened for modification /dev/watchdog 7RBLN_na.elf -
Renames itself 1 IoCs
Processes:
7RBLN_na.elfpid Process 698 7RBLN_na.elf -
Unexpected DNS network traffic destination 1 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
Processes:
description ioc Destination IP 161.97.219.84 -
Processes:
7RBLN_na.elfdescription ioc Process File deleted /var/log/kern.log 7RBLN_na.elf File deleted /var/log/daemon.log 7RBLN_na.elf -
Reads process memory 1 TTPs 1 IoCs
Read the memory of a process through the /proc virtual filesystem. This can be used to steal credentials.
Processes:
7RBLN_na.elfdescription ioc Process File opened for reading /proc/1/maps 7RBLN_na.elf -
Changes its process name 1 IoCs
Processes:
7RBLN_na.elfdescription ioc pid Process Changes the process name, possibly in an attempt to hide itself proftpd 698 7RBLN_na.elf