Malware Analysis Report

2025-08-10 21:28

Sample ID 240527-w5q26see29
Target 2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker
SHA256 c89ca41e31e7a575c6ffa74026799ee5f1dd64e2a03beae1402f62a7de7f9471
Tags
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

c89ca41e31e7a575c6ffa74026799ee5f1dd64e2a03beae1402f62a7de7f9471

Threat Level: Known bad

The file 2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker was found to be: Known bad.

Malicious Activity Summary


Detection of CryptoLocker Variants

Detection of CryptoLocker Variants

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of UnmapMainImage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-27 18:30

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

2024-05-27 18:30

Reported

2024-05-27 18:33

Platform

win7-20240221-en

Max time kernel

148s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 spinistry.com udp
US 64.98.135.121:443 spinistry.com tcp
US 64.98.135.121:443 spinistry.com tcp
US 64.98.135.121:443 spinistry.com tcp
US 64.98.135.121:443 spinistry.com tcp
US 64.98.135.121:443 spinistry.com tcp
US 64.98.135.121:443 spinistry.com tcp
US 64.98.135.121:443 spinistry.com tcp
US 64.98.135.121:443 spinistry.com tcp

Files

memory/2864-0-0x0000000000280000-0x0000000000286000-memory.dmp

memory/2864-1-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 ef030987595a2209bec02017a2744e52
SHA1 43ef072e3ec02bb6781ac2e28cc89db78486983f
SHA256 b28a58aca338fbebdf38af4b8968227781e98ebaaadad0f586858e6a1bd1b444
SHA512 03a29b5b465470bffc90df171290b3d5f5f4b4e8e204e1eabb4670381b6f8c08153a15a12dbdee850e836ecb55dd0827b4086d3a50b0e839f02bd81e309251df

memory/2864-13-0x0000000000280000-0x0000000000286000-memory.dmp

memory/2536-23-0x00000000005A0000-0x00000000005A6000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-27 18:30

Reported

2024-05-27 18:33

Platform

win10v2004-20240508-en

Max time kernel

148s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\rewok.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-27_55a0b40c22a95eac0dbff8795ed8fc74_cryptolocker.exe"

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

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

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4592,i,6166776566165096562,4582328833313060853,262144 --variations-seed-version --mojo-platform-channel-handle=4200 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 spinistry.com udp
US 64.98.135.121:443 spinistry.com tcp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 64.98.135.121:443 spinistry.com tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 64.98.135.121:443 spinistry.com tcp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 64.98.135.121:443 spinistry.com tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 64.98.135.121:443 spinistry.com tcp
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 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 64.98.135.121:443 spinistry.com tcp
US 64.98.135.121:443 spinistry.com tcp
US 64.98.135.121:443 spinistry.com tcp

Files

memory/3816-0-0x0000000002120000-0x0000000002126000-memory.dmp

memory/3816-1-0x0000000000400000-0x0000000000406000-memory.dmp

memory/3816-8-0x0000000002120000-0x0000000002126000-memory.dmp

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

MD5 ef030987595a2209bec02017a2744e52
SHA1 43ef072e3ec02bb6781ac2e28cc89db78486983f
SHA256 b28a58aca338fbebdf38af4b8968227781e98ebaaadad0f586858e6a1bd1b444
SHA512 03a29b5b465470bffc90df171290b3d5f5f4b4e8e204e1eabb4670381b6f8c08153a15a12dbdee850e836ecb55dd0827b4086d3a50b0e839f02bd81e309251df

memory/3272-25-0x0000000002D60000-0x0000000002D66000-memory.dmp