Malware Analysis Report

2025-08-10 12:07

Sample ID 240222-zlcxzsfa51
Target 2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker
SHA256 0edb5a71269986b02bfea9b1a16a0f7c4bdb73fe99083dacb2f30b524214d871
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

0edb5a71269986b02bfea9b1a16a0f7c4bdb73fe99083dacb2f30b524214d871

Threat Level: Known bad

The file 2024-02-22_f335673f25f838240b76ee713f786f02_cryptolocker was found to be: Known bad.

Malicious Activity Summary

discovery

Detection of CryptoLocker Variants

Detection of CryptoLocker Variants

Loads dropped DLL

Executes dropped EXE

Checks computer location settings

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

2024-02-22 20:47

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 20:47

Reported

2024-02-22 20:50

Platform

win7-20240221-en

Max time kernel

4s

Max time network

82s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_f335673f25f838240b76ee713f786f02_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_f335673f25f838240b76ee713f786f02_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_f335673f25f838240b76ee713f786f02_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_f335673f25f838240b76ee713f786f02_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 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp

Files

memory/1712-0-0x0000000000340000-0x0000000000346000-memory.dmp

memory/1712-1-0x0000000000400000-0x0000000000406000-memory.dmp

memory/1712-2-0x0000000000340000-0x0000000000346000-memory.dmp

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

MD5 7bd6a9cb61b48e862024957f6cefdaff
SHA1 7a8a365c2d57966b8643b30e3ff43d491489737c
SHA256 eb88d4d90d75c9fc6b963e07c46f12d94c766514863af95efb6bc7c26980fe35
SHA512 348dc6d94e06e296e9211a8537c1429fbbb9d5c21593fd2596f6442bf1d9931ec160e379b06c24cc9e5838cc64415252831b47b6a4ff6fb5a686c56a9bc15a33

memory/2120-23-0x0000000000390000-0x0000000000396000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-22 20:47

Reported

2024-02-22 20:50

Platform

win10v2004-20240221-en

Max time kernel

150s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_f335673f25f838240b76ee713f786f02_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-1-5-21-1712835645-2080934712-2142796781-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-02-22_f335673f25f838240b76ee713f786f02_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_f335673f25f838240b76ee713f786f02_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_f335673f25f838240b76ee713f786f02_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 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 9.228.82.20.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 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 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.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 8.8.8.8:53 134.71.91.104.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 0.204.248.87.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 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 179.178.17.96.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/2348-0-0x00000000021C0000-0x00000000021C6000-memory.dmp

memory/2348-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

memory/2348-2-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 7bd6a9cb61b48e862024957f6cefdaff
SHA1 7a8a365c2d57966b8643b30e3ff43d491489737c
SHA256 eb88d4d90d75c9fc6b963e07c46f12d94c766514863af95efb6bc7c26980fe35
SHA512 348dc6d94e06e296e9211a8537c1429fbbb9d5c21593fd2596f6442bf1d9931ec160e379b06c24cc9e5838cc64415252831b47b6a4ff6fb5a686c56a9bc15a33

memory/4020-21-0x00000000005E0000-0x00000000005E6000-memory.dmp