Malware Analysis Report

2025-08-05 09:35

Sample ID 240528-bwa95sag53
Target 2024-05-28_3e4484ff7ae9201d33b4db6767db8832_cryptolocker
SHA256 293e6bcf5cc5b6fd823c6b19add8afe6c8cc5667ee0af3dadf44a8402db87e58
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

293e6bcf5cc5b6fd823c6b19add8afe6c8cc5667ee0af3dadf44a8402db87e58

Threat Level: Known bad

The file 2024-05-28_3e4484ff7ae9201d33b4db6767db8832_cryptolocker was found to be: Known bad.

Malicious Activity Summary

discovery

Detection of CryptoLocker Variants

Detection of CryptoLocker Variants

Executes dropped EXE

Checks computer location settings

Loads dropped DLL

Creates a large amount of network flows

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious use of UnmapMainImage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-28 01:29

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

2024-05-28 01:29

Reported

2024-05-28 01:31

Platform

win7-20240508-en

Max time kernel

10s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-28_3e4484ff7ae9201d33b4db6767db8832_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\2024-05-28_3e4484ff7ae9201d33b4db6767db8832_cryptolocker.exe N/A

Creates a large amount of network flows

discovery

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-05-28_3e4484ff7ae9201d33b4db6767db8832_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-28_3e4484ff7ae9201d33b4db6767db8832_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/3068-0-0x00000000003C0000-0x00000000003C6000-memory.dmp

memory/3068-1-0x0000000000400000-0x0000000000406000-memory.dmp

memory/3068-8-0x00000000003C0000-0x00000000003C6000-memory.dmp

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

MD5 e46cc3d1dabb4928b2abcf056fc41b6f
SHA1 be3cbcaa5c3d1019ab1801f789f3f23d20067c40
SHA256 58d6dda9aa697d05e4a337d98cf72818fd95b846bef15f4a7985495de483cecc
SHA512 f772df1ac9623a0406dab9532721d74afc0b9d97df37dd5c4578e58237cfb55f261f32dfe7d4d4bf559e299d8c4889b2339ea6171c3495f42516c7135aa13e0c

memory/2704-23-0x0000000000310000-0x0000000000316000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-28 01:29

Reported

2024-05-28 01:31

Platform

win10v2004-20240508-en

Max time kernel

150s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-28_3e4484ff7ae9201d33b4db6767db8832_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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-05-28_3e4484ff7ae9201d33b4db6767db8832_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\2024-05-28_3e4484ff7ae9201d33b4db6767db8832_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-28_3e4484ff7ae9201d33b4db6767db8832_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 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 217.106.137.52.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 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.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 96.136.73.23.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 203.107.17.2.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 88.156.103.20.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 29.243.111.52.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 43.58.199.20.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 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/228-0-0x0000000002120000-0x0000000002126000-memory.dmp

memory/228-1-0x0000000000400000-0x0000000000406000-memory.dmp

memory/228-8-0x0000000002120000-0x0000000002126000-memory.dmp

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

MD5 e46cc3d1dabb4928b2abcf056fc41b6f
SHA1 be3cbcaa5c3d1019ab1801f789f3f23d20067c40
SHA256 58d6dda9aa697d05e4a337d98cf72818fd95b846bef15f4a7985495de483cecc
SHA512 f772df1ac9623a0406dab9532721d74afc0b9d97df37dd5c4578e58237cfb55f261f32dfe7d4d4bf559e299d8c4889b2339ea6171c3495f42516c7135aa13e0c

memory/1592-25-0x0000000002160000-0x0000000002166000-memory.dmp