Malware Analysis Report

2025-08-05 15:46

Sample ID 240527-xsx6dsee2v
Target 2024-05-27_23e2286807afacdfdeee102e1e9d2439_cryptolocker
SHA256 68d130c466aa6b4cc5c3adb2997c055076232302e43eac2d914a8e086f966e09
Tags
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

68d130c466aa6b4cc5c3adb2997c055076232302e43eac2d914a8e086f966e09

Threat Level: Known bad

The file 2024-05-27_23e2286807afacdfdeee102e1e9d2439_cryptolocker was found to be: Known bad.

Malicious Activity Summary


Detection of CryptoLocker Variants

Detection of CryptoLocker Variants

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

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 19:07

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

2024-05-27 19:07

Reported

2024-05-27 19:10

Platform

win10v2004-20240508-en

Max time kernel

136s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-27_23e2286807afacdfdeee102e1e9d2439_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_23e2286807afacdfdeee102e1e9d2439_cryptolocker.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\gewos.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\2024-05-27_23e2286807afacdfdeee102e1e9d2439_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-27_23e2286807afacdfdeee102e1e9d2439_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 --field-trial-handle=3920,i,1067197275908310731,12785105794523264014,262144 --variations-seed-version --mojo-platform-channel-handle=3848 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 nasap.net udp
US 35.212.119.5:443 nasap.net tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 5.119.212.35.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 226.20.18.104.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
NL 23.62.61.72:443 www.bing.com tcp
US 8.8.8.8:53 72.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 203.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
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 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp

Files

memory/2388-0-0x0000000000690000-0x0000000000696000-memory.dmp

memory/2388-1-0x0000000000400000-0x0000000000406000-memory.dmp

memory/2388-8-0x0000000000690000-0x0000000000696000-memory.dmp

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

MD5 6ea976dcf261a4c90ab519df8282afc2
SHA1 62c006064fcbac9bde25f6f359f5730f235db3aa
SHA256 2d0090cffb0a137d0a6491677e8e484e0c1cdb3681bc05259ea6cf30d3e6ecfd
SHA512 d1a50624c9603a6720360291c83d30ab7d3ce2f7327e3c9e03a1f3536caee63991f6591f197cbf816bbffd6c894f322d6859755b218b6e7e4828af3da2425e61

memory/4992-25-0x0000000000780000-0x0000000000786000-memory.dmp

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

MD5 c0c33f4e7e39ebdb0ef15fd46816f5ab
SHA1 c2d978c1bd42c0f6762fa92239f0299786fb684d
SHA256 b12bd036a45223ede0ccf91e834082ac2a6c11767660de13b96f583d1eaa0c24
SHA512 3238b6a74cc32e1993f2e8c63f1c1534bdcd3b5685cce60dfc6266a5c3535ab09148e1e9f36eb5bf9d09251abde63b873be5abdb14b1f9304aaa5756ff9dab4c

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-27 19:07

Reported

2024-05-27 19:10

Platform

win7-20240221-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-27_23e2286807afacdfdeee102e1e9d2439_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\2024-05-27_23e2286807afacdfdeee102e1e9d2439_cryptolocker.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-05-27_23e2286807afacdfdeee102e1e9d2439_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-27_23e2286807afacdfdeee102e1e9d2439_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/2340-0-0x0000000000310000-0x0000000000316000-memory.dmp

memory/2340-1-0x0000000000400000-0x0000000000406000-memory.dmp

memory/2340-8-0x0000000000310000-0x0000000000316000-memory.dmp

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

MD5 6ea976dcf261a4c90ab519df8282afc2
SHA1 62c006064fcbac9bde25f6f359f5730f235db3aa
SHA256 2d0090cffb0a137d0a6491677e8e484e0c1cdb3681bc05259ea6cf30d3e6ecfd
SHA512 d1a50624c9603a6720360291c83d30ab7d3ce2f7327e3c9e03a1f3536caee63991f6591f197cbf816bbffd6c894f322d6859755b218b6e7e4828af3da2425e61

memory/3056-16-0x0000000000340000-0x0000000000346000-memory.dmp