Malware Analysis Report

2025-08-05 09:28

Sample ID 240223-p2wd6agf43
Target 2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker
SHA256 4fc821f8e0fab3f4f3c9698a75cd2e92a098c1a8552e52297d7e4a5d32d6a8a4
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

4fc821f8e0fab3f4f3c9698a75cd2e92a098c1a8552e52297d7e4a5d32d6a8a4

Threat Level: Known bad

The file 2024-02-23_92aa3dfa8691f919541fd84daea2717a_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

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of UnmapMainImage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-23 12:50

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

2024-02-23 12:50

Reported

2024-02-23 12:52

Platform

win10v2004-20240221-en

Max time kernel

152s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_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\2024-02-23_92aa3dfa8691f919541fd84daea2717a_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\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_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 19.53.126.40.in-addr.arpa udp
US 8.8.8.8:53 210.178.17.96.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 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.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 8.8.8.8:53 190.178.17.96.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 31.243.111.52.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 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 10.73.50.20.in-addr.arpa udp
US 8.8.8.8:53 storage-cabinets.info udp
US 8.8.8.8:53 storage-cabinets.info udp

Files

memory/632-0-0x0000000002190000-0x0000000002196000-memory.dmp

memory/632-1-0x0000000002190000-0x0000000002196000-memory.dmp

memory/632-2-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 485c41fa1d2f63d1421170405104642b
SHA1 c521545aa3b4aaffe42d499dbffc3b21760e966c
SHA256 d982d00f1d89802c5bfe978550ccae63afff54faea5d4222ccd53d9171f6e8e9
SHA512 a2caede05142b57b86cdf9ee54e6f660401b592729efaccba76085b090905035be8d9dd8bd33bdc795b7033d014f4199c0534844931ca185f63e0976d5cc25ba

memory/3576-19-0x0000000002210000-0x0000000002216000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-23 12:50

Reported

2024-02-23 12:52

Platform

win7-20240221-en

Max time kernel

10s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_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\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe N/A

Creates a large amount of network flows

discovery

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_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/2120-3-0x0000000000270000-0x0000000000276000-memory.dmp

memory/2120-1-0x0000000000400000-0x0000000000406000-memory.dmp

memory/2120-0-0x0000000000270000-0x0000000000276000-memory.dmp

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

MD5 485c41fa1d2f63d1421170405104642b
SHA1 c521545aa3b4aaffe42d499dbffc3b21760e966c
SHA256 d982d00f1d89802c5bfe978550ccae63afff54faea5d4222ccd53d9171f6e8e9
SHA512 a2caede05142b57b86cdf9ee54e6f660401b592729efaccba76085b090905035be8d9dd8bd33bdc795b7033d014f4199c0534844931ca185f63e0976d5cc25ba

memory/2124-16-0x0000000000260000-0x0000000000266000-memory.dmp