Malware Analysis Report

2025-08-06 00:04

Sample ID 240223-m5d8yafa91
Target 2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker
SHA256 394d1f64fce15b2667c21ea8e5997126e1128b71ee753583e86df80312e6f5ca
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

394d1f64fce15b2667c21ea8e5997126e1128b71ee753583e86df80312e6f5ca

Threat Level: Known bad

The file 2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_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

Enumerates physical storage devices

Unsigned PE

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-23 11:02

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 11:02

Reported

2024-02-23 11:05

Platform

win7-20240220-en

Max time kernel

3s

Max time network

71s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_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_c9dd1680b1b34fc5d1fb66bddfd3548b_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_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_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/2468-0-0x00000000003E0000-0x00000000003E6000-memory.dmp

memory/2468-1-0x0000000000400000-0x0000000000406000-memory.dmp

memory/2468-8-0x00000000003E0000-0x00000000003E6000-memory.dmp

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

MD5 1cbec3a9763e1651814a1494cea4f718
SHA1 81792cdb9cbadee4d279459415e7976559be8e88
SHA256 409df8a3fbc1ab13d5829bee234f0d24f662772c5dec3258fbfcef56c4bb4a3e
SHA512 ac77438646ee735163210c7179892a8396c415465bb5065f9550fc5ae7077eee02402315962df1cf5403b0ea2f06368e936878e4b2880b4243801dad2cfa6546

memory/1796-17-0x0000000000380000-0x0000000000386000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-23 11:02

Reported

2024-02-23 11:05

Platform

win10v2004-20240221-en

Max time kernel

150s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_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\2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_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_c9dd1680b1b34fc5d1fb66bddfd3548b_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_c9dd1680b1b34fc5d1fb66bddfd3548b_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 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 146.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 175.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 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 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.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 0.205.248.87.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 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 8.173.189.20.in-addr.arpa udp

Files

memory/2188-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

memory/2188-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

memory/2188-2-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 1cbec3a9763e1651814a1494cea4f718
SHA1 81792cdb9cbadee4d279459415e7976559be8e88
SHA256 409df8a3fbc1ab13d5829bee234f0d24f662772c5dec3258fbfcef56c4bb4a3e
SHA512 ac77438646ee735163210c7179892a8396c415465bb5065f9550fc5ae7077eee02402315962df1cf5403b0ea2f06368e936878e4b2880b4243801dad2cfa6546

memory/3988-20-0x0000000002120000-0x0000000002126000-memory.dmp