Malware Analysis Report

2024-10-16 03:23

Sample ID 210428-zh5vkwrhas
Target b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe
SHA256 b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71
Tags
babuk ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71

Threat Level: Known bad

The file b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.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 AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2021-04-28 04:42

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2021-04-28 04:42

Reported

2021-04-28 04:46

Platform

win10v20210410

Max time kernel

14s

Max time network

115s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.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\BackupStop.raw => C:\Users\Admin\Pictures\BackupStop.raw.babyk C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened for modification C:\Users\Admin\Pictures\BackupStop.raw.babyk C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File renamed C:\Users\Admin\Pictures\SelectMeasure.crw => C:\Users\Admin\Pictures\SelectMeasure.crw.babyk C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened for modification C:\Users\Admin\Pictures\SelectMeasure.crw.babyk C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\I: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\P: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.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 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\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe

"C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.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/3200-114-0x0000000000000000-mapping.dmp

memory/2404-115-0x0000000000000000-mapping.dmp

memory/3416-116-0x0000000000000000-mapping.dmp

memory/3936-117-0x0000000000000000-mapping.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2021-04-28 04:42

Reported

2021-04-28 04:45

Platform

win7v20210410

Max time kernel

8s

Max time network

13s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.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\SelectCheckpoint.crw.babyk C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File renamed C:\Users\Admin\Pictures\SelectCheckpoint.crw => C:\Users\Admin\Pictures\SelectCheckpoint.crw.babyk C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\I: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\P: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.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\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.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 1096 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe C:\Windows\System32\cmd.exe
PID 1096 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe C:\Windows\System32\cmd.exe
PID 1096 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe C:\Windows\System32\cmd.exe
PID 1096 wrote to memory of 1992 N/A C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe C:\Windows\System32\cmd.exe
PID 1992 wrote to memory of 1060 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1992 wrote to memory of 1060 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1992 wrote to memory of 1060 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1096 wrote to memory of 1588 N/A C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe C:\Windows\System32\cmd.exe
PID 1096 wrote to memory of 1588 N/A C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe C:\Windows\System32\cmd.exe
PID 1096 wrote to memory of 1588 N/A C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe C:\Windows\System32\cmd.exe
PID 1096 wrote to memory of 1588 N/A C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe C:\Windows\System32\cmd.exe
PID 1588 wrote to memory of 568 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1588 wrote to memory of 568 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1588 wrote to memory of 568 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.exe

"C:\Users\Admin\AppData\Local\Temp\b4be6b8acda97f36c448365751d5c9a9e1b91f47cedfde79e1de258413c3de71.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/1096-60-0x00000000768B1000-0x00000000768B3000-memory.dmp

memory/1992-61-0x0000000000000000-mapping.dmp

memory/1060-62-0x0000000000000000-mapping.dmp

memory/1588-63-0x0000000000000000-mapping.dmp

memory/568-64-0x0000000000000000-mapping.dmp