Malware Analysis Report

2025-08-05 16:32

Sample ID 240611-cz4lja1hjn
Target 2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker
SHA256 638edf8d1b0defd4f6b53d71c4e4c8b53c605d988a2c810c87298a59bf3e659b
Tags
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

638edf8d1b0defd4f6b53d71c4e4c8b53c605d988a2c810c87298a59bf3e659b

Threat Level: Known bad

The file 2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker was found to be: Known bad.

Malicious Activity Summary


Detection of Cryptolocker Samples

Detection of CryptoLocker Variants

Detection of CryptoLocker Variants

Detection of Cryptolocker Samples

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-11 02:31

Signatures

Detection of CryptoLocker Variants

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

Detection of Cryptolocker Samples

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: behavioral1

Detonation Overview

Submitted

2024-06-11 02:31

Reported

2024-06-11 02:34

Platform

win7-20240508-en

Max time kernel

144s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe"

Signatures

Detection of CryptoLocker Variants

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

Detection of Cryptolocker Samples

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

Executes dropped EXE

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp

Files

memory/1700-9-0x0000000000250000-0x0000000000256000-memory.dmp

memory/1700-8-0x0000000000500000-0x000000000050E000-memory.dmp

memory/1700-1-0x0000000000290000-0x0000000000296000-memory.dmp

memory/1700-0-0x0000000000250000-0x0000000000256000-memory.dmp

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

MD5 23425bbea873cfff0cc134c11c546966
SHA1 64b80127a205d333f6ac5703b95e8a57875a350f
SHA256 0415aa0d9229d90b7ee5b6d5b75eea57a51dfdc4a8d0177099351a8487ad1895
SHA512 8d051905e8021fc866405aafa23db5deb4f9a12d6cf6cdddb8fd91ec28d105130f2cacf2e4737c7ca79e45af9a4e4e69cf5f586ce1523792e86cf2e205b4b1a6

memory/2616-16-0x0000000000500000-0x000000000050E000-memory.dmp

memory/1700-15-0x0000000002980000-0x000000000298E000-memory.dmp

memory/2616-18-0x0000000000210000-0x0000000000216000-memory.dmp

memory/2616-25-0x00000000001D0000-0x00000000001D6000-memory.dmp

memory/2616-26-0x0000000000500000-0x000000000050E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-11 02:31

Reported

2024-06-11 02:34

Platform

win10v2004-20240508-en

Max time kernel

150s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe"

Signatures

Detection of CryptoLocker Variants

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

Detection of Cryptolocker Samples

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 computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe N/A

Executes dropped EXE

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

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp

Files

memory/4120-0-0x0000000000500000-0x000000000050E000-memory.dmp

memory/4120-1-0x0000000000800000-0x0000000000806000-memory.dmp

memory/4120-8-0x0000000000800000-0x0000000000806000-memory.dmp

memory/4120-2-0x0000000000820000-0x0000000000826000-memory.dmp

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

MD5 23425bbea873cfff0cc134c11c546966
SHA1 64b80127a205d333f6ac5703b95e8a57875a350f
SHA256 0415aa0d9229d90b7ee5b6d5b75eea57a51dfdc4a8d0177099351a8487ad1895
SHA512 8d051905e8021fc866405aafa23db5deb4f9a12d6cf6cdddb8fd91ec28d105130f2cacf2e4737c7ca79e45af9a4e4e69cf5f586ce1523792e86cf2e205b4b1a6

memory/4120-17-0x0000000000500000-0x000000000050E000-memory.dmp

memory/2440-18-0x0000000000500000-0x000000000050E000-memory.dmp

memory/2440-20-0x0000000000870000-0x0000000000876000-memory.dmp

memory/2440-26-0x0000000000660000-0x0000000000666000-memory.dmp

memory/2440-27-0x0000000000500000-0x000000000050E000-memory.dmp