Malware Analysis Report

2024-10-16 03:23

Sample ID 210313-n5neqfeab6
Target e_win.exe
SHA256 9a089790e04683ebf37d9746e0284322f59c46eef2a86cc231839482f323e871
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

9a089790e04683ebf37d9746e0284322f59c46eef2a86cc231839482f323e871

Threat Level: Known bad

The file e_win.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

Suspicious use of WriteProcessMemory

Interacts with shadow copies

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-03-13 06:22

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-03-13 06:22

Reported

2021-03-13 06:24

Platform

win7v20201028

Max time kernel

5s

Max time network

12s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e_win.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\MeasureResolve.tiff C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\EditStart.tif => C:\Users\Admin\Pictures\EditStart.tif.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\MeasureResolve.tiff => C:\Users\Admin\Pictures\MeasureResolve.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\MountFind.tif => C:\Users\Admin\Pictures\MountFind.tif.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\ResolveUnlock.raw => C:\Users\Admin\Pictures\ResolveUnlock.raw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\WriteResolve.crw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\EditStart.tif.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\MeasureResolve.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\MountFind.tif.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\ResolveUnlock.raw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\WriteResolve.crw => C:\Users\Admin\Pictures\WriteResolve.crw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\P: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\I: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\e_win.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\e_win.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 776 wrote to memory of 2012 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 776 wrote to memory of 2012 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 776 wrote to memory of 2012 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 776 wrote to memory of 2012 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 2012 wrote to memory of 2044 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 2012 wrote to memory of 2044 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 2012 wrote to memory of 2044 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 776 wrote to memory of 1144 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 776 wrote to memory of 1144 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 776 wrote to memory of 1144 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 776 wrote to memory of 1144 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 1144 wrote to memory of 516 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1144 wrote to memory of 516 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1144 wrote to memory of 516 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe

Processes

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

"C:\Users\Admin\AppData\Local\Temp\e_win.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/776-2-0x0000000076071000-0x0000000076073000-memory.dmp

memory/776-4-0x00000000023E0000-0x00000000023F1000-memory.dmp

memory/776-3-0x0000000001FD0000-0x0000000001FE1000-memory.dmp

memory/2012-5-0x0000000000000000-mapping.dmp

memory/2044-6-0x0000000000000000-mapping.dmp

memory/1144-7-0x0000000000000000-mapping.dmp

memory/516-8-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2021-03-13 06:22

Reported

2021-03-13 06:24

Platform

win10v20201028

Max time kernel

18s

Max time network

112s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e_win.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\FormatPing.tiff => C:\Users\Admin\Pictures\FormatPing.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\FormatPing.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\MeasureMerge.crw => C:\Users\Admin\Pictures\MeasureMerge.crw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\RedoSwitch.tiff C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\RedoSwitch.tiff => C:\Users\Admin\Pictures\RedoSwitch.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\RedoSwitch.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\ConvertFromBlock.tiff C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\ConvertFromBlock.tiff => C:\Users\Admin\Pictures\ConvertFromBlock.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\MeasureMerge.crw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\WaitUninstall.tif => C:\Users\Admin\Pictures\WaitUninstall.tif.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\WaitUninstall.tif.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\FormatPing.tiff C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\ConvertFromBlock.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A

Enumerates connected drives

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

"C:\Users\Admin\AppData\Local\Temp\e_win.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/616-3-0x0000000003750000-0x0000000003751000-memory.dmp

memory/616-2-0x0000000002F50000-0x0000000002F51000-memory.dmp

memory/2900-4-0x0000000000000000-mapping.dmp

memory/804-5-0x0000000000000000-mapping.dmp

memory/1288-6-0x0000000000000000-mapping.dmp

memory/3464-7-0x0000000000000000-mapping.dmp