Malware Analysis Report

2024-10-16 03:23

Sample ID 210430-plxfl6jqfn
Target plast.exe
SHA256 6103e26f6f9d5fd895d9c06e1f5e141ce74d8ebda999cda6a58a4393de5ed094
Tags
babuk ransomware
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

6103e26f6f9d5fd895d9c06e1f5e141ce74d8ebda999cda6a58a4393de5ed094

Threat Level: Known bad

The file plast.exe was found to be: Known bad.

Malicious Activity Summary

babuk ransomware

Babuk Locker

Deletes shadow copies

Modifies extensions of user files

Enumerates connected drives

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Interacts with shadow copies

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-04-30 17:57

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-04-30 17:57

Reported

2021-04-30 17:59

Platform

win7v20210408

Max time kernel

135s

Max time network

136s

Command Line

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

Signatures

Babuk Locker

ransomware babuk

Deletes shadow copies

ransomware

Modifies extensions of user files

ransomware
Description Indicator Process Target
File renamed C:\Users\Admin\Pictures\RevokeSave.raw => C:\Users\Admin\Pictures\RevokeSave.raw.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\UseNew.tiff C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\UseNew.tiff => C:\Users\Admin\Pictures\UseNew.tiff.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\ResolveSave.tiff => C:\Users\Admin\Pictures\ResolveSave.tiff.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\SendJoin.tiff.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\ResolveSave.tiff C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\ExitTest.tif => C:\Users\Admin\Pictures\ExitTest.tif.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\GetWrite.png => C:\Users\Admin\Pictures\GetWrite.png.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\ExitTest.tif.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\SendJoin.tiff C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\RevokeSave.raw.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\UseNew.tiff.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\CompleteDeny.tif => C:\Users\Admin\Pictures\CompleteDeny.tif.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\GetWrite.png.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\ResolveSave.tiff.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\SearchSet.raw => C:\Users\Admin\Pictures\SearchSet.raw.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\SearchSet.raw.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\SendJoin.tiff => C:\Users\Admin\Pictures\SendJoin.tiff.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\CompleteDeny.tif.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\P: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\I: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A

Enumerates physical storage devices

Interacts with shadow copies

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

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\plast.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1948 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\plast.exe C:\Windows\System32\cmd.exe
PID 1948 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\plast.exe C:\Windows\System32\cmd.exe
PID 1948 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\plast.exe C:\Windows\System32\cmd.exe
PID 1948 wrote to memory of 1316 N/A C:\Users\Admin\AppData\Local\Temp\plast.exe C:\Windows\System32\cmd.exe
PID 1316 wrote to memory of 1248 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1316 wrote to memory of 1248 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1316 wrote to memory of 1248 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1948 wrote to memory of 336 N/A C:\Users\Admin\AppData\Local\Temp\plast.exe C:\Windows\System32\cmd.exe
PID 1948 wrote to memory of 336 N/A C:\Users\Admin\AppData\Local\Temp\plast.exe C:\Windows\System32\cmd.exe
PID 1948 wrote to memory of 336 N/A C:\Users\Admin\AppData\Local\Temp\plast.exe C:\Windows\System32\cmd.exe
PID 1948 wrote to memory of 336 N/A C:\Users\Admin\AppData\Local\Temp\plast.exe C:\Windows\System32\cmd.exe
PID 336 wrote to memory of 1536 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 336 wrote to memory of 1536 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 336 wrote to memory of 1536 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe

Processes

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

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

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet

C:\Windows\system32\vssadmin.exe

vssadmin.exe delete shadows /all /quiet

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet

C:\Windows\system32\vssadmin.exe

vssadmin.exe delete shadows /all /quiet

Network

N/A

Files

memory/1948-59-0x0000000076691000-0x0000000076693000-memory.dmp

memory/1316-60-0x0000000000000000-mapping.dmp

memory/1248-61-0x0000000000000000-mapping.dmp

memory/336-62-0x0000000000000000-mapping.dmp

memory/1536-63-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2021-04-30 17:57

Reported

2021-04-30 17:59

Platform

win10v20210410

Max time kernel

24s

Max time network

120s

Command Line

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

Signatures

Babuk Locker

ransomware babuk

Deletes shadow copies

ransomware

Modifies extensions of user files

ransomware
Description Indicator Process Target
File opened for modification C:\Users\Admin\Pictures\ExpandInitialize.tif.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\ReadEnable.tif => C:\Users\Admin\Pictures\ReadEnable.tif.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\ReceiveWait.tiff.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\ExpandInitialize.tif => C:\Users\Admin\Pictures\ExpandInitialize.tif.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\ReceiveWait.tiff C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\CompareMerge.raw => C:\Users\Admin\Pictures\CompareMerge.raw.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\HideResize.raw.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\RestartComplete.tif => C:\Users\Admin\Pictures\RestartComplete.tif.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\UnblockStep.png => C:\Users\Admin\Pictures\UnblockStep.png.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\UnblockStep.png.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\CompareMerge.raw.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\HideResize.raw => C:\Users\Admin\Pictures\HideResize.raw.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\ReadEnable.tif.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File renamed C:\Users\Admin\Pictures\ReceiveWait.tiff => C:\Users\Admin\Pictures\ReceiveWait.tiff.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened for modification C:\Users\Admin\Pictures\RestartComplete.tif.babyk C:\Users\Admin\AppData\Local\Temp\plast.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\I: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\P: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\plast.exe N/A

Enumerates physical storage devices

Interacts with shadow copies

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

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\plast.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\plast.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A

Processes

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

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

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet

C:\Windows\system32\vssadmin.exe

vssadmin.exe delete shadows /all /quiet

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet

C:\Windows\system32\vssadmin.exe

vssadmin.exe delete shadows /all /quiet

Network

N/A

Files

memory/1116-114-0x0000000000000000-mapping.dmp

memory/1456-115-0x0000000000000000-mapping.dmp

memory/3600-116-0x0000000000000000-mapping.dmp

memory/2148-117-0x0000000000000000-mapping.dmp