Malware Analysis Report

2024-10-16 03:24

Sample ID 210416-kn884nv1n6
Target l.exe
SHA256 bb31f235e86b0fda185e6580ef5327f80d6a6c754f78499e8647de5e229769cc
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

bb31f235e86b0fda185e6580ef5327f80d6a6c754f78499e8647de5e229769cc

Threat Level: Known bad

The file l.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

Interacts with shadow copies

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-04-16 00:36

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-04-16 00:36

Reported

2021-04-16 00:38

Platform

win7v20210408

Max time kernel

33s

Max time network

34s

Command Line

"C:\Users\Admin\AppData\Local\Temp\l.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\LimitTest.tiff.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File renamed C:\Users\Admin\Pictures\ResumeOptimize.crw => C:\Users\Admin\Pictures\ResumeOptimize.crw.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File opened for modification C:\Users\Admin\Pictures\ResumeOptimize.crw.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File renamed C:\Users\Admin\Pictures\RepairWait.tif => C:\Users\Admin\Pictures\RepairWait.tif.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File opened for modification C:\Users\Admin\Pictures\LimitTest.tiff C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File renamed C:\Users\Admin\Pictures\LimitDisable.raw => C:\Users\Admin\Pictures\LimitDisable.raw.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File opened for modification C:\Users\Admin\Pictures\LimitDisable.raw.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File renamed C:\Users\Admin\Pictures\LimitTest.tiff => C:\Users\Admin\Pictures\LimitTest.tiff.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File opened for modification C:\Users\Admin\Pictures\RepairWait.tif.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A

Enumerates connected drives

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

"C:\Users\Admin\AppData\Local\Temp\l.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/1028-60-0x0000000075801000-0x0000000075803000-memory.dmp

memory/2020-61-0x0000000000000000-mapping.dmp

memory/1284-62-0x0000000000000000-mapping.dmp

memory/512-63-0x0000000000000000-mapping.dmp

memory/1004-64-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2021-04-16 00:36

Reported

2021-04-16 00:38

Platform

win10v20210410

Max time kernel

14s

Max time network

110s

Command Line

"C:\Users\Admin\AppData\Local\Temp\l.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\MountEdit.tif.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File opened for modification C:\Users\Admin\Pictures\StartUninstall.tiff C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File renamed C:\Users\Admin\Pictures\StartUninstall.tiff => C:\Users\Admin\Pictures\StartUninstall.tiff.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File renamed C:\Users\Admin\Pictures\ConvertFromUpdate.raw => C:\Users\Admin\Pictures\ConvertFromUpdate.raw.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File opened for modification C:\Users\Admin\Pictures\ConvertFromUpdate.raw.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File renamed C:\Users\Admin\Pictures\MountEdit.tif => C:\Users\Admin\Pictures\MountEdit.tif.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File renamed C:\Users\Admin\Pictures\MountRead.tif => C:\Users\Admin\Pictures\MountRead.tif.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File opened for modification C:\Users\Admin\Pictures\MountRead.tif.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File renamed C:\Users\Admin\Pictures\SaveRequest.raw => C:\Users\Admin\Pictures\SaveRequest.raw.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File opened for modification C:\Users\Admin\Pictures\SaveRequest.raw.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A
File opened for modification C:\Users\Admin\Pictures\StartUninstall.tiff.babyk C:\Users\Admin\AppData\Local\Temp\l.exe N/A

Enumerates connected drives

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

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

C:\Windows\System32\cmd.exe

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

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\vssadmin.exe

vssadmin.exe delete shadows /all /quiet

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

Network

N/A

Files

memory/1612-114-0x0000000000000000-mapping.dmp

memory/2684-115-0x0000000000000000-mapping.dmp

memory/1316-116-0x0000000000000000-mapping.dmp

memory/408-117-0x0000000000000000-mapping.dmp