Malware Analysis Report

2024-10-16 03:23

Sample ID 221001-nb7h3agheq
Target LockBit3Builder.7z
SHA256 453eebd2dcf98e15e9ccab2c706438a9d34497631db1f64b6fe9cc3ed41696da
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 Overview

score
10/10

SHA256

453eebd2dcf98e15e9ccab2c706438a9d34497631db1f64b6fe9cc3ed41696da

Threat Level: Known bad

The file LockBit3Builder.7z was found to be: Known bad.

Malicious Activity Summary

blackmatter

Blackmatter family

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of SetWindowsHookEx

Modifies registry class

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-10-01 11:14

Signatures

Blackmatter family

blackmatter

Analysis: behavioral1

Detonation Overview

Submitted

2022-10-01 11:14

Reported

2022-10-01 11:17

Platform

win7-20220812-en

Max time kernel

43s

Max time network

45s

Command Line

cmd /c C:\Users\Admin\AppData\Local\Temp\LockBit3Builder.7z

Signatures

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_Classes\Local Settings C:\Windows\system32\rundll32.exe N/A
Key created \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache C:\Windows\system32\rundll32.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: 33 N/A C:\Windows\system32\AUDIODG.EXE N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\system32\AUDIODG.EXE N/A
Token: 33 N/A C:\Windows\system32\AUDIODG.EXE N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\system32\AUDIODG.EXE N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1048 wrote to memory of 1136 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 1048 wrote to memory of 1136 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe
PID 1048 wrote to memory of 1136 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\rundll32.exe

Processes

C:\Windows\system32\cmd.exe

cmd /c C:\Users\Admin\AppData\Local\Temp\LockBit3Builder.7z

C:\Windows\system32\rundll32.exe

"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\LockBit3Builder.7z

C:\Windows\explorer.exe

"C:\Windows\explorer.exe"

C:\Windows\system32\AUDIODG.EXE

C:\Windows\system32\AUDIODG.EXE 0x580

Network

N/A

Files

memory/1048-54-0x000007FEFC281000-0x000007FEFC283000-memory.dmp

memory/1136-76-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-10-01 11:14

Reported

2022-10-01 11:17

Platform

win10v2004-20220812-en

Max time kernel

111s

Max time network

144s

Command Line

cmd /c C:\Users\Admin\AppData\Local\Temp\LockBit3Builder.7z

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 behavior: GetForegroundWindowSpam

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\LockBit3Builder.7z

C:\Windows\system32\OpenWith.exe

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

Network

Country Destination Domain Proto
US 93.184.220.29:80 tcp
US 93.184.220.29:80 tcp
NL 104.80.225.205:443 tcp
NL 104.110.191.140:80 tcp
NL 104.110.191.140:80 tcp

Files

N/A