Malware Analysis Report

2025-08-05 16:07

Sample ID 240526-ed1nvsdh2x
Target 2024-05-26_aa44caf6478289043774feece217573a_cryptolocker
SHA256 1fce562d33b6ed2fd5e6afe4cf856bfcc21e679ba8d7344527a530a233697ae5
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

1fce562d33b6ed2fd5e6afe4cf856bfcc21e679ba8d7344527a530a233697ae5

Threat Level: Known bad

The file 2024-05-26_aa44caf6478289043774feece217573a_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 UnmapMainImage

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-26 03:50

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: behavioral1

Detonation Overview

Submitted

2024-05-26 03:50

Reported

2024-05-26 03:52

Platform

win7-20240508-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-26_aa44caf6478289043774feece217573a_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\gewos.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-05-26_aa44caf6478289043774feece217573a_cryptolocker.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-05-26_aa44caf6478289043774feece217573a_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-26_aa44caf6478289043774feece217573a_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 nasap.net udp
US 35.212.119.5:443 nasap.net tcp

Files

memory/2980-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

memory/2980-1-0x0000000000400000-0x0000000000406000-memory.dmp

memory/2980-8-0x00000000005A0000-0x00000000005A6000-memory.dmp

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

MD5 d046b310113223544a59c64b46e2721a
SHA1 30850ef625daacf9f55539f51f248cd31dc7a477
SHA256 24b1d02f70ecf999693bf5e2225bd642ff5bab6ac6c78931f1e1d50306c79f1b
SHA512 bb93247e5518e5e8b263cb5124eec3a1478c0393ecb818bd1d5bb3b3803a3e9ab235439758337e90e9f907b9bac566fe47062bc171993286596c0ed1d08e183d

memory/2548-23-0x0000000000380000-0x0000000000386000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-26 03:50

Reported

2024-05-26 03:52

Platform

win10v2004-20240226-en

Max time kernel

142s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-26_aa44caf6478289043774feece217573a_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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\gewos.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-05-26_aa44caf6478289043774feece217573a_cryptolocker.exe N/A

Executes dropped EXE

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

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-05-26_aa44caf6478289043774feece217573a_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-26_aa44caf6478289043774feece217573a_cryptolocker.exe"

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

"C:\Users\Admin\AppData\Local\Temp\gewos.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 --mojo-platform-channel-handle=3996 --field-trial-handle=2280,i,1836084024518340990,18250262151825427757,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 nasap.net udp
US 35.212.119.5:443 nasap.net tcp
US 8.8.8.8:53 5.119.212.35.in-addr.arpa udp
US 8.8.8.8:53 226.20.18.104.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
GB 142.250.187.202:443 tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 27.178.89.13.in-addr.arpa udp

Files

memory/2260-0-0x00000000021D0000-0x00000000021D6000-memory.dmp

memory/2260-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

memory/2260-2-0x0000000000400000-0x0000000000406000-memory.dmp

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

MD5 d046b310113223544a59c64b46e2721a
SHA1 30850ef625daacf9f55539f51f248cd31dc7a477
SHA256 24b1d02f70ecf999693bf5e2225bd642ff5bab6ac6c78931f1e1d50306c79f1b
SHA512 bb93247e5518e5e8b263cb5124eec3a1478c0393ecb818bd1d5bb3b3803a3e9ab235439758337e90e9f907b9bac566fe47062bc171993286596c0ed1d08e183d

memory/4992-25-0x0000000002200000-0x0000000002206000-memory.dmp

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

MD5 2f46acc858654b2fc3ed644895eeaa87
SHA1 4c4f0eb3f4a5298d4152881277932dfbe07beb09
SHA256 8a93b1618cf8a42deff24d2bd50bf8066ba7bac9c7de148d3cb6b86007b1e417
SHA512 7382af2d4bc46d519e62eb15283bf3de61a9051c2ea9f1f828323fe4d992669fe6aed8b89b82659092cbb1107eb7cbb00f75a9d52f911a9900f8e0058240c8e7