Malware Analysis Report

2025-08-11 06:03

Sample ID 240222-v75gxadf22
Target 2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker
SHA256 7a5acd9fd0adcb951f40cfe533c8f7dd9f7a19ba56487b3b606108097f976c53
Tags
discovery
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

7a5acd9fd0adcb951f40cfe533c8f7dd9f7a19ba56487b3b606108097f976c53

Threat Level: Known bad

The file 2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_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 17:38

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: behavioral2

Detonation Overview

Submitted

2024-02-22 17:38

Reported

2024-02-22 17:41

Platform

win10v2004-20240221-en

Max time kernel

150s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_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-1-5-21-2132103209-3755304320-2959162027-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_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_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 148.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa 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 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 storage-cabinets.info udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa 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 8.8.8.8:53 191.178.17.96.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 8.8.8.8:53 181.178.17.96.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/1612-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

memory/1612-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

memory/1612-2-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 ffc35fc562442f6fb46cf352f3461d5f
SHA1 0618fba8726f5b3d299c088e6b99577561bfa061
SHA256 a2d5d7599d88262c21f0a916d10fbe3e3ea62acc4aaad79acd5533869f858c91
SHA512 4c23d24956700318e8a13b59a82df525be737546f09462aa4bca04c29b0aa0a42c9d501e5139975c2ff6798ce10fd2d6d6d021b1c5f0b3d2caf9c99a982e2fd7

memory/4932-22-0x0000000002210000-0x0000000002216000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-22 17:38

Reported

2024-02-22 17:41

Platform

win7-20240221-en

Max time kernel

10s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_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_5c1398d8bf8f62c68ea581b470a2c497_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_5c1398d8bf8f62c68ea581b470a2c497_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_5c1398d8bf8f62c68ea581b470a2c497_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/2332-0-0x00000000002A0000-0x00000000002A6000-memory.dmp

memory/2332-1-0x0000000000400000-0x0000000000406000-memory.dmp

memory/2332-2-0x00000000002A0000-0x00000000002A6000-memory.dmp

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

MD5 ffc35fc562442f6fb46cf352f3461d5f
SHA1 0618fba8726f5b3d299c088e6b99577561bfa061
SHA256 a2d5d7599d88262c21f0a916d10fbe3e3ea62acc4aaad79acd5533869f858c91
SHA512 4c23d24956700318e8a13b59a82df525be737546f09462aa4bca04c29b0aa0a42c9d501e5139975c2ff6798ce10fd2d6d6d021b1c5f0b3d2caf9c99a982e2fd7

memory/2540-18-0x0000000000270000-0x0000000000276000-memory.dmp