Malware Analysis Report

2024-09-11 01:53

Sample ID 230629-zs72psfa95
Target medusa.exe
SHA256 1bc0575b3fc6486cb2510dac1ac6ae4889b94a955d3eade53d3ba3a92d133281
Tags
upx medusalocker evasion ransomware spyware stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

1bc0575b3fc6486cb2510dac1ac6ae4889b94a955d3eade53d3ba3a92d133281

Threat Level: Known bad

The file medusa.exe was found to be: Known bad.

Malicious Activity Summary

upx medusalocker evasion ransomware spyware stealer trojan

MedusaLocker payload

UAC bypass

MedusaLocker

Medusalocker family

Renames multiple (308) files with added filename extension

Deletes shadow copies

Renames multiple (193) files with added filename extension

Modifies extensions of user files

UPX packed file

Executes dropped EXE

Reads user/profile data of web browsers

Enumerates connected drives

Checks whether UAC is enabled

Drops desktop.ini file(s)

Enumerates physical storage devices

Unsigned PE

Uses Volume Shadow Copy service COM API

System policy modification

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Interacts with shadow copies

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V6

Analysis: static1

Detonation Overview

Reported

2023-06-29 20:59

Signatures

MedusaLocker payload

Description Indicator Process Target
N/A N/A N/A N/A

Medusalocker family

medusalocker

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-06-29 20:59

Reported

2023-06-29 21:01

Platform

win7-20230621-en

Max time kernel

60s

Max time network

30s

Command Line

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

Signatures

MedusaLocker

ransomware medusalocker

MedusaLocker payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A

Deletes shadow copies

ransomware

Renames multiple (308) files with added filename extension

ransomware

Modifies extensions of user files

ransomware
Description Indicator Process Target
File renamed C:\Users\Admin\Pictures\MergeSelect.tiff => C:\Users\Admin\Pictures\MergeSelect.tiff.marlock07 C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
File opened for modification C:\Users\Admin\Pictures\MergeSelect.tiff C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A

Reads user/profile data of web browsers

spyware stealer

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A

Drops desktop.ini file(s)

Description Indicator Process Target
File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-1437583205-2177757337-340526699-1000\desktop.ini C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A

Enumerates connected drives

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

Enumerates physical storage devices

Interacts with shadow copies

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\vssadmin.exe N/A
N/A N/A C:\Windows\SysWOW64\vssadmin.exe N/A
N/A N/A C:\Windows\SysWOW64\vssadmin.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.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
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 34 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 35 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 34 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 35 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 34 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 35 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2040 wrote to memory of 1644 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2040 wrote to memory of 1644 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2040 wrote to memory of 1644 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2040 wrote to memory of 1644 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2040 wrote to memory of 1172 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\Wbem\wmic.exe
PID 2040 wrote to memory of 1172 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\Wbem\wmic.exe
PID 2040 wrote to memory of 1172 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\Wbem\wmic.exe
PID 2040 wrote to memory of 1172 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\Wbem\wmic.exe
PID 2040 wrote to memory of 1824 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2040 wrote to memory of 1824 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2040 wrote to memory of 1824 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2040 wrote to memory of 1824 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2040 wrote to memory of 1460 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\Wbem\wmic.exe
PID 2040 wrote to memory of 1460 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\Wbem\wmic.exe
PID 2040 wrote to memory of 1460 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\Wbem\wmic.exe
PID 2040 wrote to memory of 1460 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\Wbem\wmic.exe
PID 2040 wrote to memory of 304 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2040 wrote to memory of 304 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2040 wrote to memory of 304 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2040 wrote to memory of 304 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\vssadmin.exe
PID 2040 wrote to memory of 1464 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\Wbem\wmic.exe
PID 2040 wrote to memory of 1464 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\Wbem\wmic.exe
PID 2040 wrote to memory of 1464 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\Wbem\wmic.exe
PID 2040 wrote to memory of 1464 N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe C:\Windows\SysWOW64\Wbem\wmic.exe

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A

Uses Volume Shadow Copy service COM API

ransomware

Processes

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

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

C:\Windows\SysWOW64\vssadmin.exe

vssadmin.exe Delete Shadows /All /Quiet

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\SysWOW64\Wbem\wmic.exe

wmic.exe SHADOWCOPY /nointeractive

C:\Windows\SysWOW64\vssadmin.exe

vssadmin.exe Delete Shadows /All /Quiet

C:\Windows\SysWOW64\Wbem\wmic.exe

wmic.exe SHADOWCOPY /nointeractive

C:\Windows\SysWOW64\vssadmin.exe

vssadmin.exe Delete Shadows /All /Quiet

C:\Windows\SysWOW64\Wbem\wmic.exe

wmic.exe SHADOWCOPY /nointeractive

C:\Windows\system32\taskeng.exe

taskeng.exe {53ECCF28-E365-4B67-BFF5-0BBE6E016405} S-1-5-21-1437583205-2177757337-340526699-1000:XVLNHWCX\Admin:Interactive:[1]

Network

N/A

Files

memory/2040-55-0x0000000000930000-0x00000000009E2000-memory.dmp

C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\HOW_TO_RECOVER_DATA.html

MD5 cc660315e8fb1cdab34618592a34258b
SHA1 2e6a70afa70c84ad86d514cc60c6ede8b6f71796
SHA256 c6c56714e6880c6783d94b40630fa39920a18df061eaa579881c5cbe7a6d8579
SHA512 564ffa0b47bc9813d13c1d23f187a35c14a2d1c9da79a4b952d3e33bc21f552e0a0649f0a3b6407ee4568cea7240dc837fdd838b2aa000db6453b0c5f2e3df8e

memory/2040-311-0x0000000000930000-0x00000000009E2000-memory.dmp

C:\Users\Default\NTUSER.DAT.LOG2

MD5 b05f1abd2019d89d0f7ed70bd61da678
SHA1 06b21256b9c91eee0c6d1f54a2322ba951db6b66
SHA256 ab5a1d9ab526373609221dc42249af566ce992c5c28046f28bf6192194582207
SHA512 d0eb88a70ba373ce71843f90049bc96a77dd137cee10db43938e352383aae731a7a872fe6d6849641a5672e0de452f24007bd119c7b2c056b4e1c47d70a84a86

memory/2040-951-0x0000000000930000-0x00000000009E2000-memory.dmp

memory/2040-1003-0x0000000000930000-0x00000000009E2000-memory.dmp

memory/2040-1005-0x0000000000930000-0x00000000009E2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-06-29 20:59

Reported

2023-06-29 21:30

Platform

win10v2004-20230621-en

Max time kernel

1800s

Max time network

1233s

Command Line

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

Signatures

MedusaLocker

ransomware medusalocker

MedusaLocker payload

Description Indicator Process Target
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UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A

Renames multiple (193) files with added filename extension

ransomware

Modifies extensions of user files

ransomware
Description Indicator Process Target
File renamed C:\Users\Admin\Pictures\InstallUse.png => C:\Users\Admin\Pictures\InstallUse.png.marlock07 C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\svhost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svhost.exe N/A

Reads user/profile data of web browsers

spyware stealer

UPX packed file

upx
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Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A

Drops desktop.ini file(s)

Description Indicator Process Target
File opened for modification \??\Z:\$RECYCLE.BIN\S-1-5-21-2890635272-812199704-3564780063-1000\desktop.ini C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A

Enumerates connected drives

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

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
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Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 34 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 35 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 36 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 34 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 35 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 36 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 34 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 35 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A
Token: 36 N/A C:\Windows\SysWOW64\Wbem\wmic.exe N/A

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0" C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\medusa.exe N/A

Processes

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

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

C:\Windows\SysWOW64\Wbem\wmic.exe

wmic.exe SHADOWCOPY /nointeractive

C:\Windows\SysWOW64\Wbem\wmic.exe

wmic.exe SHADOWCOPY /nointeractive

C:\Windows\SysWOW64\Wbem\wmic.exe

wmic.exe SHADOWCOPY /nointeractive

C:\Users\Admin\AppData\Roaming\svhost.exe

C:\Users\Admin\AppData\Roaming\svhost.exe

C:\Users\Admin\AppData\Roaming\svhost.exe

C:\Users\Admin\AppData\Roaming\svhost.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 108.211.229.192.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 159.204.76.23.in-addr.arpa udp
US 8.8.8.8:53 1.77.109.52.in-addr.arpa udp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
GB 96.16.110.41:443 tcp
US 8.8.8.8:53 123.10.44.20.in-addr.arpa udp

Files

memory/456-134-0x0000000000150000-0x0000000000202000-memory.dmp

\Device\HarddiskVolume1\Boot\HOW_TO_RECOVER_DATA.html

MD5 0f3ccb2b4f2eee3edc8a7a430c93636b
SHA1 6ff91d68b557b262927517d7b00713635fe90429
SHA256 4ed876b316d0802c05a5d0c04e620791aaf8f96a9e026c4ccd0cc69c13fd711a
SHA512 3553f13912fb041146c2d4b8ed4cc56957a140b632f7ad740293c0889d1cd9a7e6cbc7e2bae2d250e271c3c5a30cf248bd343293f3146a49eb6a0bdd4b5acded

memory/456-194-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-196-0x0000000000150000-0x0000000000202000-memory.dmp

C:\Users\Default\ntuser.dat.LOG2

MD5 709734d8e4aaf4da3200ca16c9d25016
SHA1 7a540a45643594f8d7fc1afed6132872eae86023
SHA256 c792586a0ec5b6b46cb4462709426c8ed2b0e17b36530aea181747f970b95f79
SHA512 52731572df805757e6d82234a30d01c9315144fde1dacd419c8b8a5f2ee4739b29d66ec04aaa35188533f4cb99f1b69e4bf0507a4081c09e0c925bd6750f4f89

memory/456-740-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-741-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-742-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-743-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-744-0x0000000000150000-0x0000000000202000-memory.dmp

C:\Users\Admin\AppData\Roaming\svhost.exe

MD5 f6f120d1262b88f79debb5d848ac7db9
SHA1 1339282f9b2d2a41326daf3cf284ec2ae8f0f93c
SHA256 1bc0575b3fc6486cb2510dac1ac6ae4889b94a955d3eade53d3ba3a92d133281
SHA512 1067c1a73cf891d651fa007f4ccc4452f32801fe3859933ef1bcc00985e35ce016fa6c601c0e3c10df2080fc9b8a776b2f18d40bd64dfb98177ab638c4b545bd

C:\Users\Admin\AppData\Roaming\svhost.exe

MD5 f6f120d1262b88f79debb5d848ac7db9
SHA1 1339282f9b2d2a41326daf3cf284ec2ae8f0f93c
SHA256 1bc0575b3fc6486cb2510dac1ac6ae4889b94a955d3eade53d3ba3a92d133281
SHA512 1067c1a73cf891d651fa007f4ccc4452f32801fe3859933ef1bcc00985e35ce016fa6c601c0e3c10df2080fc9b8a776b2f18d40bd64dfb98177ab638c4b545bd

memory/1996-747-0x00000000005A0000-0x0000000000652000-memory.dmp

memory/456-748-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-749-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-750-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-751-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-752-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-753-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-754-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-767-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-768-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-769-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-770-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-771-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-772-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-773-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-774-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-775-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-776-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-777-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-778-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-779-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-780-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-793-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-795-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-796-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-797-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-798-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-799-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-800-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-801-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-802-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-803-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-804-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-805-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-819-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-820-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-821-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-822-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-823-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-824-0x0000000000150000-0x0000000000202000-memory.dmp

memory/456-825-0x0000000000150000-0x0000000000202000-memory.dmp

C:\Users\Admin\AppData\Roaming\svhost.exe

MD5 f6f120d1262b88f79debb5d848ac7db9
SHA1 1339282f9b2d2a41326daf3cf284ec2ae8f0f93c
SHA256 1bc0575b3fc6486cb2510dac1ac6ae4889b94a955d3eade53d3ba3a92d133281
SHA512 1067c1a73cf891d651fa007f4ccc4452f32801fe3859933ef1bcc00985e35ce016fa6c601c0e3c10df2080fc9b8a776b2f18d40bd64dfb98177ab638c4b545bd

memory/1204-875-0x00000000005A0000-0x0000000000652000-memory.dmp