Malware Analysis Report

2025-08-06 00:03

Sample ID 240223-my7lxafa3v
Target 2024-02-23_8a5ca1f1ea6229115d0a471c96a80dc7_cryptolocker
SHA256 829baaf34b074e7efe50d68a19a022d3085e2c8b74bff6742785145dfd4b6c2c
Tags
discovery
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

829baaf34b074e7efe50d68a19a022d3085e2c8b74bff6742785145dfd4b6c2c

Threat Level: Known bad

The file 2024-02-23_8a5ca1f1ea6229115d0a471c96a80dc7_cryptolocker was found to be: Known bad.

Malicious Activity Summary

discovery

Detection of CryptoLocker Variants

Detection of CryptoLocker Variants

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Creates a large amount of network flows

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of UnmapMainImage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-23 10:53

Signatures

Detection of CryptoLocker Variants

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-23 10:53

Reported

2024-02-23 10:56

Platform

win10v2004-20240221-en

Max time kernel

151s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_8a5ca1f1ea6229115d0a471c96a80dc7_cryptolocker.exe"

Signatures

Detection of CryptoLocker Variants

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3538781373-1545967067-4263767959-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-02-23_8a5ca1f1ea6229115d0a471c96a80dc7_cryptolocker.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\retln.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-02-23_8a5ca1f1ea6229115d0a471c96a80dc7_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_8a5ca1f1ea6229115d0a471c96a80dc7_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 190.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info 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 storage-cabinets.info udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 200.79.70.13.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp

Files

memory/2392-0-0x0000000002350000-0x0000000002356000-memory.dmp

memory/2392-1-0x0000000002350000-0x0000000002356000-memory.dmp

memory/2392-2-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 83ecf5187dcb5a86da7a441b56e3b74a
SHA1 d213e561c064ed3f343d9ee42934c355d485124a
SHA256 16df08ec826bd1b514ef0f129cdda4eaf78c28ef798f294804981e6d3f78ef4f
SHA512 b151732e9ea488c3d43a4f1cddfe01cbdfb0351f2f5d3b9ff09ab1e08268474d936c1c7f5df6e9653404e1d87826db42745c7fa2cf1207067bde956fb38a16b5

memory/2020-24-0x0000000002010000-0x0000000002016000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-23 10:53

Reported

2024-02-23 10:56

Platform

win7-20240221-en

Max time kernel

18s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_8a5ca1f1ea6229115d0a471c96a80dc7_cryptolocker.exe"

Signatures

Detection of CryptoLocker Variants

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\retln.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-02-23_8a5ca1f1ea6229115d0a471c96a80dc7_cryptolocker.exe N/A

Creates a large amount of network flows

discovery

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-02-23_8a5ca1f1ea6229115d0a471c96a80dc7_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_8a5ca1f1ea6229115d0a471c96a80dc7_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 storage-cabinets.info udp

Files

memory/1860-0-0x0000000000340000-0x0000000000346000-memory.dmp

memory/1860-1-0x0000000000400000-0x0000000000406000-memory.dmp

memory/1860-2-0x0000000000340000-0x0000000000346000-memory.dmp

\Users\Admin\AppData\Local\Temp\retln.exe

MD5 83ecf5187dcb5a86da7a441b56e3b74a
SHA1 d213e561c064ed3f343d9ee42934c355d485124a
SHA256 16df08ec826bd1b514ef0f129cdda4eaf78c28ef798f294804981e6d3f78ef4f
SHA512 b151732e9ea488c3d43a4f1cddfe01cbdfb0351f2f5d3b9ff09ab1e08268474d936c1c7f5df6e9653404e1d87826db42745c7fa2cf1207067bde956fb38a16b5

memory/2280-17-0x00000000003C0000-0x00000000003C6000-memory.dmp