Malware Analysis Report

2024-09-11 01:47

Sample ID 240227-wea82afd93
Target 9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.sample
SHA256 9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7
Tags
medusalocker
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7

Threat Level: Known bad

The file 9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.sample was found to be: Known bad.

Malicious Activity Summary

medusalocker

MedusaLocker payload

Medusalocker family

Suspicious use of NtCreateUserProcessOtherParentProcess

Enumerates connected drives

Unsigned PE

Suspicious use of WriteProcessMemory

System policy modification

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Privilege Escalation
TA0004
Defense Evasion
TA0005
Modify Registry
T1112
Credential Access
TA0006
Discovery
TA0007
Query Registry
T1012
Peripheral Device Discovery
T1120
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-02-27 17:49

Signatures

MedusaLocker payload

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

Medusalocker family

medusalocker

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-27 17:49

Reported

2024-02-27 17:52

Platform

win10v2004-20240226-en

Max time kernel

147s

Max time network

155s

Command Line

C:\Windows\Explorer.EXE

Signatures

Suspicious use of NtCreateUserProcessOtherParentProcess

Description Indicator Process Target
PID 392 created 3340 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\Explorer.EXE

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\I: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\P: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 392 wrote to memory of 4748 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe
PID 392 wrote to memory of 4748 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe
PID 392 wrote to memory of 4748 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe
PID 4748 wrote to memory of 2224 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe
PID 4748 wrote to memory of 2224 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe
PID 4748 wrote to memory of 2224 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe
PID 392 wrote to memory of 4960 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe
PID 392 wrote to memory of 4960 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe
PID 392 wrote to memory of 4960 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe

System policy modification

evasion
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe

"C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe"

C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe

\\?\C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe -network

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c pause

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c pause

Network

Country Destination Domain Proto
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 182.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 204.178.17.96.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-27 17:49

Reported

2024-02-27 17:52

Platform

win7-20240221-en

Max time kernel

121s

Max time network

123s

Command Line

C:\Windows\Explorer.EXE

Signatures

Suspicious use of NtCreateUserProcessOtherParentProcess

Description Indicator Process Target
PID 2188 created 1192 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\Explorer.EXE

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\P: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\U: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\Z: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\A: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\H: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\N: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\O: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\B: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\E: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\M: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\V: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\Y: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\G: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\J: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\L: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\W: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\S: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\T: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\X: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\I: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\K: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\Q: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
File opened (read-only) \??\R: C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2188 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe
PID 2188 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe
PID 2188 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe
PID 2188 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe
PID 2504 wrote to memory of 2624 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe
PID 2504 wrote to memory of 2624 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe
PID 2504 wrote to memory of 2624 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe
PID 2504 wrote to memory of 2624 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe
PID 2188 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe
PID 2188 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe
PID 2188 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe
PID 2188 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe C:\Windows\SysWOW64\cmd.exe

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLinkedConnections = "1" C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe N/A

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe

"C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe"

C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe

\\?\C:\Users\Admin\AppData\Local\Temp\9c5c1dc70479d5839604a61f5849dee0fc09075d220c07e28343fa6d49cdb7d7.exe -network

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c pause

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c pause

Network

N/A

Files

N/A