Malware Analysis Report

2025-08-10 12:07

Sample ID 240222-z84dfsfc6s
Target 2024-02-22_10c24dcc69a62127ce58d390091a317e_cryptolocker
SHA256 1306752b59ffdb15f4a3cd61c54cbc400d71207cee150dd67dd45e90987a7932
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

1306752b59ffdb15f4a3cd61c54cbc400d71207cee150dd67dd45e90987a7932

Threat Level: Known bad

The file 2024-02-22_10c24dcc69a62127ce58d390091a317e_cryptolocker was found to be: Known bad.

Malicious Activity Summary

discovery

Detection of CryptoLocker Variants

Detection of CryptoLocker Variants

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Creates a large amount of network flows

Unsigned PE

Enumerates physical storage devices

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-22 21:24

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

2024-02-22 21:24

Reported

2024-02-22 21:26

Platform

win10v2004-20240221-en

Max time kernel

150s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_10c24dcc69a62127ce58d390091a317e_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-1-5-21-910440534-423636034-2318342392-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-02-22_10c24dcc69a62127ce58d390091a317e_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\2024-02-22_10c24dcc69a62127ce58d390091a317e_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_10c24dcc69a62127ce58d390091a317e_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
US 8.8.8.8:53 72.32.126.40.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 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 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa 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 8.8.8.8:53 193.178.17.96.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 8.8.8.8:53 208.178.17.96.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 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 169.253.116.51.in-addr.arpa udp

Files

memory/4724-0-0x0000000002250000-0x0000000002256000-memory.dmp

memory/4724-1-0x0000000002250000-0x0000000002256000-memory.dmp

memory/4724-2-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 fff9f5ba0cdf87e537132c073d69645b
SHA1 66f598aa7ea5dd52ce8420f623b2985189d8af87
SHA256 2e03dea3d573a5f5cac3a14eca74a1e5bd63b6627d6753db78247318321bc7d4
SHA512 5bb1962fd700933871b9d0fad1d19744b395b8c2b7cb68b007da7c776d41cf84b0ff43203f3df4e8a796e3494057d56594028ab051c8ed3c241315ddb99716c1

memory/2792-21-0x00000000020D0000-0x00000000020D6000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-22 21:24

Reported

2024-02-22 21:26

Platform

win7-20240221-en

Max time kernel

13s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_10c24dcc69a62127ce58d390091a317e_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\2024-02-22_10c24dcc69a62127ce58d390091a317e_cryptolocker.exe N/A

Creates a large amount of network flows

discovery

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-02-22_10c24dcc69a62127ce58d390091a317e_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_10c24dcc69a62127ce58d390091a317e_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/2208-0-0x00000000003E0000-0x00000000003E6000-memory.dmp

memory/2208-2-0x00000000003E0000-0x00000000003E6000-memory.dmp

memory/2208-1-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 fff9f5ba0cdf87e537132c073d69645b
SHA1 66f598aa7ea5dd52ce8420f623b2985189d8af87
SHA256 2e03dea3d573a5f5cac3a14eca74a1e5bd63b6627d6753db78247318321bc7d4
SHA512 5bb1962fd700933871b9d0fad1d19744b395b8c2b7cb68b007da7c776d41cf84b0ff43203f3df4e8a796e3494057d56594028ab051c8ed3c241315ddb99716c1

memory/2512-21-0x0000000000270000-0x0000000000276000-memory.dmp