Malware Analysis Report

2025-08-05 09:28

Sample ID 240223-p3vh9agf63
Target 2024-02-23_a149418ee29df4dde05b41d2222699bc_cryptolocker
SHA256 228e913b3a21f68b1649e71d6e947b4596db6bd7d3dacdc224c0dfb087fe6892
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

228e913b3a21f68b1649e71d6e947b4596db6bd7d3dacdc224c0dfb087fe6892

Threat Level: Known bad

The file 2024-02-23_a149418ee29df4dde05b41d2222699bc_cryptolocker was found to be: Known bad.

Malicious Activity Summary

discovery

Detection of CryptoLocker Variants

Detection of CryptoLocker Variants

Checks computer location settings

Loads dropped DLL

Executes dropped EXE

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

2024-02-23 12:51

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

2024-02-23 12:51

Reported

2024-02-23 12:54

Platform

win7-20240221-en

Max time kernel

12s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_a149418ee29df4dde05b41d2222699bc_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_a149418ee29df4dde05b41d2222699bc_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_a149418ee29df4dde05b41d2222699bc_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_a149418ee29df4dde05b41d2222699bc_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/624-0-0x00000000003E0000-0x00000000003E6000-memory.dmp

memory/624-2-0x00000000003E0000-0x00000000003E6000-memory.dmp

memory/624-1-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 66e265f539eda4c87789f8fb8f333ca0
SHA1 888e961d6bd7ac92fa832bb6ab5cf6cf07c7cc87
SHA256 8af8cecb7ae45ff3c473b87b19ec8e6da6c9195d8f2a4dc13fb294f2e8ecf294
SHA512 7aeb1b626180cb5d4efdcdd56149bb73f524e99295782e1dc8c7bc673b13457293751950966501894bff5c92bf69982af248e0b334cb3b75d591a8b97f14db43

memory/1920-19-0x0000000000260000-0x0000000000266000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-23 12:51

Reported

2024-02-23 12:54

Platform

win10v2004-20240221-en

Max time kernel

150s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_a149418ee29df4dde05b41d2222699bc_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-1-5-21-1414748551-1520717498-2956787782-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-02-23_a149418ee29df4dde05b41d2222699bc_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_a149418ee29df4dde05b41d2222699bc_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_a149418ee29df4dde05b41d2222699bc_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 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 210.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 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 50.23.12.20.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 8.8.8.8:53 180.178.17.96.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 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 173.178.17.96.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 8.8.8.8:53 123.10.44.20.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp

Files

memory/1780-0-0x00000000022D0000-0x00000000022D6000-memory.dmp

memory/1780-1-0x00000000022D0000-0x00000000022D6000-memory.dmp

memory/1780-2-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 66e265f539eda4c87789f8fb8f333ca0
SHA1 888e961d6bd7ac92fa832bb6ab5cf6cf07c7cc87
SHA256 8af8cecb7ae45ff3c473b87b19ec8e6da6c9195d8f2a4dc13fb294f2e8ecf294
SHA512 7aeb1b626180cb5d4efdcdd56149bb73f524e99295782e1dc8c7bc673b13457293751950966501894bff5c92bf69982af248e0b334cb3b75d591a8b97f14db43

memory/4432-20-0x0000000002120000-0x0000000002126000-memory.dmp