Malware Analysis Report

2025-08-11 06:03

Sample ID 240222-v715gsda9z
Target 2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker
SHA256 e689e0dd3483f5cec614632fe93788fbde40d9b5f92020162f15e5f2854f30ad
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

e689e0dd3483f5cec614632fe93788fbde40d9b5f92020162f15e5f2854f30ad

Threat Level: Known bad

The file 2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker was found to be: Known bad.

Malicious Activity Summary

discovery

Detection of CryptoLocker Variants

Detection of CryptoLocker Variants

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Creates a large amount of network flows

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of UnmapMainImage

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

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_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-1-5-21-3054445511-921769590-4013668107-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_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_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_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 6.181.190.20.in-addr.arpa 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 8.8.8.8:53 208.178.17.96.in-addr.arpa 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 8.8.8.8:53 103.169.127.40.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 8.8.8.8:53 203.178.17.96.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 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 209.178.17.96.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 8.8.8.8:53 123.10.44.20.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp

Files

memory/1596-0-0x0000000002260000-0x0000000002266000-memory.dmp

memory/1596-1-0x0000000002260000-0x0000000002266000-memory.dmp

memory/1596-2-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 6b2cebbda46f03e28edcc28c4d0e3e12
SHA1 1cc9c621b828608cdc4d68aab3d933dc48664a9a
SHA256 4620177060892eb70ca96513e1749d0a1e145a4359db5a04fd08aaf21e29c5be
SHA512 c752ca421c7793029a77fe93c171110366c73672c33e1147c81cf084bed58b598adfe7feb057bcaf286a868ab989184010e775b4c38f1d4871b334cf27f61b3e

memory/4980-20-0x0000000002D60000-0x0000000002D66000-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

12s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_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_5b3f14eadc9ee8eacdf50f2b4ed39e1d_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_5b3f14eadc9ee8eacdf50f2b4ed39e1d_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-22_5b3f14eadc9ee8eacdf50f2b4ed39e1d_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/2192-0-0x00000000003C0000-0x00000000003C6000-memory.dmp

memory/2192-2-0x0000000000400000-0x0000000000406000-memory.dmp

memory/2192-1-0x00000000003C0000-0x00000000003C6000-memory.dmp

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

MD5 6b2cebbda46f03e28edcc28c4d0e3e12
SHA1 1cc9c621b828608cdc4d68aab3d933dc48664a9a
SHA256 4620177060892eb70ca96513e1749d0a1e145a4359db5a04fd08aaf21e29c5be
SHA512 c752ca421c7793029a77fe93c171110366c73672c33e1147c81cf084bed58b598adfe7feb057bcaf286a868ab989184010e775b4c38f1d4871b334cf27f61b3e

memory/2572-19-0x00000000002F0000-0x00000000002F6000-memory.dmp