Malware Analysis Report

2025-08-10 12:06

Sample ID 240222-zcnccsfc78
Target 2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker
SHA256 1f838f808e67b4fe8c69f97fe489e7f86589a7c3b83a03e41e7f4e8c434d9568
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

1f838f808e67b4fe8c69f97fe489e7f86589a7c3b83a03e41e7f4e8c434d9568

Threat Level: Known bad

The file 2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_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

2024-02-22 20:34

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 20:34

Reported

2024-02-22 20:37

Platform

win7-20240221-en

Max time kernel

11s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_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_648afc78acd72a9f26786ee7d2ef7d90_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_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_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/3012-0-0x0000000000260000-0x0000000000266000-memory.dmp

memory/3012-2-0x0000000000260000-0x0000000000266000-memory.dmp

memory/3012-1-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 dc40b9379c679d7eec20377b36552225
SHA1 6aee4f7f4a684bd36aee4d0a4b1b7ab6f5deaf1c
SHA256 9c9bde0b9a8ed77071d7ccb7bfcd5381c9b5b74f3833db78b34b612079a4e164
SHA512 444842ab4a9320a50a66b7d6f7db7ad1a4ccdee9d6600148ab3b5c4764bf0ff52b239ee7f79dd87dce71b0b450431ced12b3b7860d651814fdbd929e828cbb94

memory/2516-19-0x00000000002E0000-0x00000000002E6000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-22 20:34

Reported

2024-02-22 20:37

Platform

win10v2004-20240221-en

Max time kernel

151s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_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-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_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_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_648afc78acd72a9f26786ee7d2ef7d90_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa 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 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 18.31.95.13.in-addr.arpa 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 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 8.8.8.8:53 191.178.17.96.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 18.173.189.20.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp

Files

memory/4444-0-0x0000000000530000-0x0000000000536000-memory.dmp

memory/4444-1-0x0000000000530000-0x0000000000536000-memory.dmp

memory/4444-2-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 dc40b9379c679d7eec20377b36552225
SHA1 6aee4f7f4a684bd36aee4d0a4b1b7ab6f5deaf1c
SHA256 9c9bde0b9a8ed77071d7ccb7bfcd5381c9b5b74f3833db78b34b612079a4e164
SHA512 444842ab4a9320a50a66b7d6f7db7ad1a4ccdee9d6600148ab3b5c4764bf0ff52b239ee7f79dd87dce71b0b450431ced12b3b7860d651814fdbd929e828cbb94

memory/1520-21-0x00000000021D0000-0x00000000021D6000-memory.dmp