Malware Analysis Report

2024-10-16 03:23

Sample ID 210405-jyqjv5w9a6
Target e_win.exe
SHA256 f1719415abe4dcba0daef0a1e5c8994d1d3c0c659d3e0a11b34f307370dd8683
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

f1719415abe4dcba0daef0a1e5c8994d1d3c0c659d3e0a11b34f307370dd8683

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

Interacts with shadow copies

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-04-05 04:36

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-04-05 04:36

Reported

2021-04-05 04:38

Platform

win7v20201028

Max time kernel

150s

Max time network

151s

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\RemoveStart.tiff C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\InitializeStep.tif => C:\Users\Admin\Pictures\InitializeStep.tif.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\InitializeStep.tif.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\RemoveStart.tiff => C:\Users\Admin\Pictures\RemoveStart.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\RemoveStart.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\Q: 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) \??\U: 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) \??\F: 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) \??\B: 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) \??\Z: 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) \??\M: 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) \??\E: 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) \??\H: 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) \??\X: 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) \??\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) \??\O: 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

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 1924 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 1924 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 1924 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 1924 wrote to memory of 1996 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 1996 wrote to memory of 1972 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1996 wrote to memory of 1972 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1996 wrote to memory of 1972 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1924 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 1924 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 1924 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 1924 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\e_win.exe C:\Windows\System32\cmd.exe
PID 752 wrote to memory of 812 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 752 wrote to memory of 812 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 752 wrote to memory of 812 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/1924-2-0x0000000075AE1000-0x0000000075AE3000-memory.dmp

memory/1924-3-0x0000000001E10000-0x0000000001E21000-memory.dmp

memory/1924-4-0x0000000002220000-0x0000000002231000-memory.dmp

memory/1996-5-0x0000000000000000-mapping.dmp

memory/1972-6-0x0000000000000000-mapping.dmp

memory/752-7-0x0000000000000000-mapping.dmp

memory/812-8-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2021-04-05 04:36

Reported

2021-04-05 04:38

Platform

win10v20201028

Max time kernel

17s

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 opened for modification C:\Users\Admin\Pictures\UnprotectUninstall.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\RenameGrant.raw => C:\Users\Admin\Pictures\RenameGrant.raw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\RenameGrant.raw.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\RenameReset.tif => C:\Users\Admin\Pictures\RenameReset.tif.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\RenameReset.tif.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File opened for modification C:\Users\Admin\Pictures\UnprotectUninstall.tiff C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A
File renamed C:\Users\Admin\Pictures\UnprotectUninstall.tiff => C:\Users\Admin\Pictures\UnprotectUninstall.tiff.babyk C:\Users\Admin\AppData\Local\Temp\e_win.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\I: 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) \??\S: 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) \??\Q: 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) \??\Y: 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) \??\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) \??\X: 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) \??\R: 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) \??\B: 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) \??\H: 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) \??\M: 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) \??\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) \??\Z: 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/3084-2-0x0000000002F50000-0x0000000002F51000-memory.dmp

memory/3084-3-0x0000000003750000-0x0000000003751000-memory.dmp

memory/2796-4-0x0000000000000000-mapping.dmp

memory/3924-5-0x0000000000000000-mapping.dmp

memory/1332-6-0x0000000000000000-mapping.dmp

memory/3864-7-0x0000000000000000-mapping.dmp