Malware Analysis Report

2025-08-11 06:03

Sample ID 240222-v9mpwadb4t
Target 2024-02-22_7331189f179bf45624e853f42159b67d_cryptolocker
SHA256 ac27aac6351d9d30b38cb6e0c020c8e1c59e145e0c149d2e0fc30f89c698d547
Tags
discovery
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

ac27aac6351d9d30b38cb6e0c020c8e1c59e145e0c149d2e0fc30f89c698d547

Threat Level: Known bad

The file 2024-02-22_7331189f179bf45624e853f42159b67d_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

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 17:41

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: behavioral1

Detonation Overview

Submitted

2024-02-22 17:41

Reported

2024-02-22 17:44

Platform

win7-20240221-en

Max time kernel

12s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_7331189f179bf45624e853f42159b67d_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_7331189f179bf45624e853f42159b67d_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_7331189f179bf45624e853f42159b67d_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_7331189f179bf45624e853f42159b67d_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/2384-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

memory/2384-2-0x0000000000400000-0x0000000000406000-memory.dmp

memory/2384-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

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

MD5 8dad3616d8187ad43e69dc75f097ed03
SHA1 7d9d3bcd9074ecd73eaf19c873a750156b82787b
SHA256 7cf7aa7cd7ffae8343a8673fc1e44e53f2a50f6c62456f4f1fba35e0cca3dbba
SHA512 543e5b762eb55298764de17ebe93516040e227437a236a504e46a8a8471574d8160afbc1ba7aabd2fbc10fd7cf9a29e2302b59e2aec5cb58c594c969c61659b2

memory/2500-23-0x0000000000260000-0x0000000000266000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-22 17:41

Reported

2024-02-22 17:44

Platform

win10v2004-20240221-en

Max time kernel

150s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_7331189f179bf45624e853f42159b67d_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-1-5-21-3054445511-921769590-4013668107-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-02-22_7331189f179bf45624e853f42159b67d_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_7331189f179bf45624e853f42159b67d_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_7331189f179bf45624e853f42159b67d_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 20.160.190.20.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 8.8.8.8:53 209.78.101.95.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net 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 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 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 140.71.91.104.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 8.8.8.8:53 152.78.101.95.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 8.8.8.8:53 192.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 19.229.111.52.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 8.8.8.8:53 210.143.182.52.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp

Files

memory/1152-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

memory/1152-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

memory/1152-2-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 8dad3616d8187ad43e69dc75f097ed03
SHA1 7d9d3bcd9074ecd73eaf19c873a750156b82787b
SHA256 7cf7aa7cd7ffae8343a8673fc1e44e53f2a50f6c62456f4f1fba35e0cca3dbba
SHA512 543e5b762eb55298764de17ebe93516040e227437a236a504e46a8a8471574d8160afbc1ba7aabd2fbc10fd7cf9a29e2302b59e2aec5cb58c594c969c61659b2

memory/1352-20-0x0000000002D60000-0x0000000002D66000-memory.dmp