Malware Analysis Report

2025-08-11 06:03

Sample ID 240222-wdfr5adc3v
Target 2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker
SHA256 a916bf519645d34dc9a55f47fb864b9074406be5311a88dd5193ddef8262a3e0
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

a916bf519645d34dc9a55f47fb864b9074406be5311a88dd5193ddef8262a3e0

Threat Level: Known bad

The file 2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_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 17:48

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 17:48

Reported

2024-02-22 17:50

Platform

win7-20240220-en

Max time kernel

16s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_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_aa64fef12286342a6b5de2fd9bfa853c_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_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_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/3032-0-0x00000000002C0000-0x00000000002C6000-memory.dmp

memory/3032-1-0x0000000000400000-0x0000000000406000-memory.dmp

memory/3032-3-0x00000000002C0000-0x00000000002C6000-memory.dmp

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

MD5 533b9b2805c6ed4944bec0d6be0ec4dd
SHA1 415737c064168b442a055a405a22c6c154d9b35a
SHA256 ede8df99d99dd15dedff2705d65c52485817a644946f58818c46715e69d3d2d2
SHA512 887f72d098848aec2eeb231c8c753698c70645a748d904d3ce39a4634fa2dda5591aa70685fcfa7f73f75387f0da84ce44d5941feba611179c3e79585c7232b7

memory/2884-17-0x00000000003C0000-0x00000000003C6000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-22 17:48

Reported

2024-02-22 17:50

Platform

win10v2004-20240221-en

Max time kernel

150s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_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-1-5-21-2828415587-3732861812-1919322417-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_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_aa64fef12286342a6b5de2fd9bfa853c_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_aa64fef12286342a6b5de2fd9bfa853c_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 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 44.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info 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 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 134.71.91.104.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 82.179.17.96.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 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 177.178.17.96.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

Files

memory/3904-0-0x0000000002260000-0x0000000002266000-memory.dmp

memory/3904-1-0x0000000002260000-0x0000000002266000-memory.dmp

memory/3904-2-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 533b9b2805c6ed4944bec0d6be0ec4dd
SHA1 415737c064168b442a055a405a22c6c154d9b35a
SHA256 ede8df99d99dd15dedff2705d65c52485817a644946f58818c46715e69d3d2d2
SHA512 887f72d098848aec2eeb231c8c753698c70645a748d904d3ce39a4634fa2dda5591aa70685fcfa7f73f75387f0da84ce44d5941feba611179c3e79585c7232b7

memory/4792-23-0x0000000002D60000-0x0000000002D66000-memory.dmp