Malware Analysis Report

2024-10-16 03:22

Sample ID 220929-rh3p8sbba8
Target LockBit30.7z
SHA256 1d6561c4714fadf16bcfb244a5444a959a953424d8e2c6acca6ccb2e20117e74
Tags
blackmatter
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

1d6561c4714fadf16bcfb244a5444a959a953424d8e2c6acca6ccb2e20117e74

Threat Level: Known bad

The file LockBit30.7z was found to be: Known bad.

Malicious Activity Summary

blackmatter

Blackmatter family

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Runs .reg file with regedit

Modifies registry class

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-09-29 14:17

Signatures

Blackmatter family

blackmatter

Analysis: behavioral1

Detonation Overview

Submitted

2022-09-29 14:12

Reported

2022-09-29 14:23

Platform

win10v2004-20220812-en

Max time kernel

69s

Max time network

76s

Command Line

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Build.bat"

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3168 wrote to memory of 916 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\keygen.exe
PID 3168 wrote to memory of 916 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\keygen.exe
PID 3168 wrote to memory of 916 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\keygen.exe
PID 3168 wrote to memory of 2292 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 2292 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 2292 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4328 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4328 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4328 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4740 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4740 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4740 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4936 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4936 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4936 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4760 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4760 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4760 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4660 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4660 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe
PID 3168 wrote to memory of 4660 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Local\Temp\builder.exe

Processes

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Build.bat"

C:\Users\Admin\AppData\Local\Temp\keygen.exe

keygen -path C:\Users\Admin\AppData\Local\Temp\Build -pubkey pub.key -privkey priv.key

C:\Users\Admin\AppData\Local\Temp\builder.exe

builder -type dec -privkey C:\Users\Admin\AppData\Local\Temp\Build\priv.key -config config.json -ofile C:\Users\Admin\AppData\Local\Temp\Build\LB3Decryptor.exe

C:\Users\Admin\AppData\Local\Temp\builder.exe

builder -type enc -exe -pubkey C:\Users\Admin\AppData\Local\Temp\Build\pub.key -config config.json -ofile C:\Users\Admin\AppData\Local\Temp\Build\LB3.exe

C:\Users\Admin\AppData\Local\Temp\builder.exe

builder -type enc -exe -pass -pubkey C:\Users\Admin\AppData\Local\Temp\Build\pub.key -config config.json -ofile C:\Users\Admin\AppData\Local\Temp\Build\LB3_pass.exe

C:\Users\Admin\AppData\Local\Temp\builder.exe

builder -type enc -dll -pubkey C:\Users\Admin\AppData\Local\Temp\Build\pub.key -config config.json -ofile C:\Users\Admin\AppData\Local\Temp\Build\LB3_Rundll32.dll

C:\Users\Admin\AppData\Local\Temp\builder.exe

builder -type enc -dll -pass -pubkey C:\Users\Admin\AppData\Local\Temp\Build\pub.key -config config.json -ofile C:\Users\Admin\AppData\Local\Temp\Build\LB3_Rundll32_pass.dll

C:\Users\Admin\AppData\Local\Temp\builder.exe

builder -type enc -ref -pubkey C:\Users\Admin\AppData\Local\Temp\Build\pub.key -config config.json -ofile C:\Users\Admin\AppData\Local\Temp\Build\LB3_ReflectiveDll_DllMain.dll

Network

Country Destination Domain Proto
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
US 93.184.220.29:80 tcp
DE 51.116.253.168:443 tcp
US 209.197.3.8:80 tcp
US 209.197.3.8:80 tcp
NL 104.80.225.205:443 tcp

Files

memory/916-132-0x0000000000000000-mapping.dmp

memory/2292-133-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Local\Temp\Build\priv.key

MD5 a01fe80bd439daf7b3ce844d6d049c87
SHA1 59b99d611349fc473c32e5320623783d08191364
SHA256 c90f0d8583f70b2814f7e76253342a177a0fe1739265a576d415b2a0fd21df01
SHA512 e515043c50f629904e69fac3ec0f38a4d3d15e00234e1dab302bf351861450fe4ddd9de8119e8ef15f9e35b47a35481208cd0898297fbd0bae330d6b28b26e66

memory/4328-135-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Local\Temp\Build\pub.key

MD5 c33caeb2fed30526198b3e2089b22b45
SHA1 dc4ca0943ed8aaeb37af473e4e68ead73f46aa3f
SHA256 a9e49a832783226897e48ed26b46b08621f8f9a08c2c69b1462ccb07b9334090
SHA512 a2410c66c21dc2d063d0efb9fd4066bc5708682af190372e443e49426b88a3941f57cdc746112e9243fabd4950697f0948fabf550a2460637bccf8129b9734dd

memory/4740-137-0x0000000000000000-mapping.dmp

memory/4936-138-0x0000000000000000-mapping.dmp

memory/4760-139-0x0000000000000000-mapping.dmp

memory/4660-140-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-09-29 14:12

Reported

2022-09-29 14:23

Platform

win10v2004-20220901-en

Max time kernel

64s

Max time network

68s

Command Line

"C:\Users\Admin\AppData\Local\Temp\builder.exe"

Signatures

Runs .reg file with regedit

Description Indicator Process Target
N/A N/A C:\Windows\regedit.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\builder.exe

"C:\Users\Admin\AppData\Local\Temp\builder.exe"

C:\Windows\regedit.exe

"regedit.exe" "C:\Users\Admin\Desktop\SuspendEnable.reg"

Network

Country Destination Domain Proto
US 93.184.221.240:80 tcp
US 20.189.173.1:443 tcp
NL 87.248.202.1:80 tcp
US 93.184.221.240:80 tcp

Files

N/A

Analysis: behavioral3

Detonation Overview

Submitted

2022-09-29 14:12

Reported

2022-09-29 14:23

Platform

win10v2004-20220812-en

Max time kernel

80s

Max time network

83s

Command Line

cmd /c C:\Users\Admin\AppData\Local\Temp\config.json

Signatures

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\Local Settings C:\Windows\system32\cmd.exe N/A
Key created \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000_Classes\Local Settings C:\Windows\system32\OpenWith.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\system32\OpenWith.exe N/A

Processes

C:\Windows\system32\cmd.exe

cmd /c C:\Users\Admin\AppData\Local\Temp\config.json

C:\Windows\system32\OpenWith.exe

C:\Windows\system32\OpenWith.exe -Embedding

Network

Country Destination Domain Proto
DE 20.52.64.200:443 tcp
NL 87.248.202.1:80 tcp

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2022-09-29 14:12

Reported

2022-09-29 14:23

Platform

win10v2004-20220812-en

Max time kernel

85s

Max time network

88s

Command Line

"C:\Users\Admin\AppData\Local\Temp\keygen.exe"

Signatures

N/A

Processes

C:\Users\Admin\AppData\Local\Temp\keygen.exe

"C:\Users\Admin\AppData\Local\Temp\keygen.exe"

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
US 209.197.3.8:80 tcp
DE 51.116.253.168:443 tcp
NL 104.80.225.205:443 tcp
US 209.197.3.8:80 tcp

Files

N/A