Malware Analysis Report

2024-10-16 03:24

Sample ID 210810-dxwge4a48j
Target e_win.bin.zip
SHA256 cb7cd5de34353ff74b8e1f829cffc8d9532b2652fe2d832fa5e57c30c5bde2a8
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

cb7cd5de34353ff74b8e1f829cffc8d9532b2652fe2d832fa5e57c30c5bde2a8

Threat Level: Known bad

The file e_win.bin.zip 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 use of WriteProcessMemory

Interacts with shadow copies

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-08-10 00:23

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-08-10 00:23

Reported

2021-08-10 00:26

Platform

win7v20210410

Max time kernel

17s

Max time network

47s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e_win.bin.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\SplitInstall.crw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File renamed C:\Users\Admin\Pictures\ConvertFromExport.raw => C:\Users\Admin\Pictures\ConvertFromExport.raw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened for modification C:\Users\Admin\Pictures\ConvertFromExport.raw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File renamed C:\Users\Admin\Pictures\FormatHide.raw => C:\Users\Admin\Pictures\FormatHide.raw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened for modification C:\Users\Admin\Pictures\FormatHide.raw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File renamed C:\Users\Admin\Pictures\MergeShow.tif => C:\Users\Admin\Pictures\MergeShow.tif.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened for modification C:\Users\Admin\Pictures\MergeShow.tif.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File renamed C:\Users\Admin\Pictures\SplitInstall.crw => C:\Users\Admin\Pictures\SplitInstall.crw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\P: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\I: C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\e_win.bin.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.bin.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 1724 wrote to memory of 1300 N/A C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe C:\Windows\System32\cmd.exe
PID 1724 wrote to memory of 1300 N/A C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe C:\Windows\System32\cmd.exe
PID 1724 wrote to memory of 1300 N/A C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe C:\Windows\System32\cmd.exe
PID 1724 wrote to memory of 1300 N/A C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe C:\Windows\System32\cmd.exe
PID 1300 wrote to memory of 1372 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1300 wrote to memory of 1372 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1300 wrote to memory of 1372 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1724 wrote to memory of 620 N/A C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe C:\Windows\System32\cmd.exe
PID 1724 wrote to memory of 620 N/A C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe C:\Windows\System32\cmd.exe
PID 1724 wrote to memory of 620 N/A C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe C:\Windows\System32\cmd.exe
PID 1724 wrote to memory of 620 N/A C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe C:\Windows\System32\cmd.exe
PID 620 wrote to memory of 1392 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 620 wrote to memory of 1392 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 620 wrote to memory of 1392 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe

Processes

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

"C:\Users\Admin\AppData\Local\Temp\e_win.bin.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/1724-60-0x0000000075161000-0x0000000075163000-memory.dmp

memory/1300-61-0x0000000000000000-mapping.dmp

memory/1372-62-0x0000000000000000-mapping.dmp

memory/620-63-0x0000000000000000-mapping.dmp

memory/1392-64-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2021-08-10 00:23

Reported

2021-08-10 00:26

Platform

win10v20210408

Max time kernel

18s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e_win.bin.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\ImportSync.png => C:\Users\Admin\Pictures\ImportSync.png.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened for modification C:\Users\Admin\Pictures\ImportSync.png.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened for modification C:\Users\Admin\Pictures\InitializeFormat.tiff C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File renamed C:\Users\Admin\Pictures\InitializeFormat.tiff => C:\Users\Admin\Pictures\InitializeFormat.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened for modification C:\Users\Admin\Pictures\InitializeFormat.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File renamed C:\Users\Admin\Pictures\RestoreMove.png => C:\Users\Admin\Pictures\RestoreMove.png.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A
File opened for modification C:\Users\Admin\Pictures\RestoreMove.png.babyk C:\Users\Admin\AppData\Local\Temp\e_win.bin.exe N/A

Enumerates connected drives

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

"C:\Users\Admin\AppData\Local\Temp\e_win.bin.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/2560-114-0x0000000000000000-mapping.dmp

memory/3560-115-0x0000000000000000-mapping.dmp

memory/3760-116-0x0000000000000000-mapping.dmp

memory/4008-117-0x0000000000000000-mapping.dmp