Malware Analysis Report

2025-08-05 16:33

Sample ID 240611-cydcys1gkn
Target 2024-06-11_5197f2b53d09189e27b01f914539f07b_cryptolocker
SHA256 4fe4549b3947338a34c2f787e819a28c273c9d99aa1d3978a21b18c553387b34
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

4fe4549b3947338a34c2f787e819a28c273c9d99aa1d3978a21b18c553387b34

Threat Level: Known bad

The file 2024-06-11_5197f2b53d09189e27b01f914539f07b_cryptolocker was found to be: Known bad.

Malicious Activity Summary


Detects executables built or packed with MPress PE compressor

Detection of CryptoLocker Variants

Detection of Cryptolocker Samples

Detection of CryptoLocker Variants

Detection of Cryptolocker Samples

Detects executables built or packed with MPress PE compressor

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-11 02:28

Signatures

Detection of CryptoLocker Variants

Description Indicator Process Target
N/A N/A N/A N/A

Detection of Cryptolocker Samples

Description Indicator Process Target
N/A N/A N/A N/A

Detects executables built or packed with MPress PE compressor

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

2024-06-11 02:28

Reported

2024-06-11 02:31

Platform

win7-20240221-en

Max time kernel

1s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_5197f2b53d09189e27b01f914539f07b_cryptolocker.exe"

Signatures

Detection of CryptoLocker Variants

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Detection of Cryptolocker Samples

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Detects executables built or packed with MPress PE compressor

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
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\misid.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-11_5197f2b53d09189e27b01f914539f07b_cryptolocker.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-11_5197f2b53d09189e27b01f914539f07b_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_5197f2b53d09189e27b01f914539f07b_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 bestccc.com udp
IN 103.91.187.97:443 bestccc.com tcp
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IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp
IN 103.91.187.97:443 bestccc.com tcp

Files

memory/1612-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

memory/1612-9-0x00000000002C0000-0x00000000002C6000-memory.dmp

memory/1612-2-0x0000000000330000-0x0000000000336000-memory.dmp

memory/1612-0-0x0000000000500000-0x000000000050F000-memory.dmp

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

MD5 5152e81cee8681927ae10aabe7d9f548
SHA1 9139b43f8e3fbd5bef3c634859c90956fa93a96d
SHA256 7b88eaea8a8d2c8f7768f8dee074fafb2cf263ad519b936e053bec0d3d9552cd
SHA512 322a6dab5836255ecbc93d3d4bb2366737fe0a1f6f7fb0d1764607aeea04884886b3e7c47fa3a7bd7959c465d119d66e9ec858322bba79e3110c533f7f4c80b4

memory/2612-26-0x0000000000320000-0x0000000000326000-memory.dmp

memory/2612-19-0x0000000000450000-0x0000000000456000-memory.dmp

memory/1612-16-0x0000000000500000-0x000000000050F000-memory.dmp

memory/2612-17-0x0000000000500000-0x000000000050F000-memory.dmp

memory/1612-13-0x0000000002700000-0x000000000270F000-memory.dmp

memory/2612-27-0x0000000000500000-0x000000000050F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-11 02:28

Reported

2024-06-11 02:31

Platform

win10v2004-20240508-en

Max time kernel

150s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_5197f2b53d09189e27b01f914539f07b_cryptolocker.exe"

Signatures

Detection of CryptoLocker Variants

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Detection of Cryptolocker Samples

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Detects executables built or packed with MPress PE compressor

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
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\2024-06-11_5197f2b53d09189e27b01f914539f07b_cryptolocker.exe N/A

Executes dropped EXE

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

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-11_5197f2b53d09189e27b01f914539f07b_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_5197f2b53d09189e27b01f914539f07b_cryptolocker.exe"

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

"C:\Users\Admin\AppData\Local\Temp\misid.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=4584,i,17096020621006928097,15544233752327415349,262144 --variations-seed-version --mojo-platform-channel-handle=4360 /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 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp
US 8.8.8.8:53 bestccc.com udp

Files

memory/3200-0-0x0000000000500000-0x000000000050F000-memory.dmp

memory/3200-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

memory/3200-2-0x0000000002060000-0x0000000002066000-memory.dmp

memory/3200-9-0x00000000021D0000-0x00000000021D6000-memory.dmp

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

MD5 5152e81cee8681927ae10aabe7d9f548
SHA1 9139b43f8e3fbd5bef3c634859c90956fa93a96d
SHA256 7b88eaea8a8d2c8f7768f8dee074fafb2cf263ad519b936e053bec0d3d9552cd
SHA512 322a6dab5836255ecbc93d3d4bb2366737fe0a1f6f7fb0d1764607aeea04884886b3e7c47fa3a7bd7959c465d119d66e9ec858322bba79e3110c533f7f4c80b4

memory/3056-20-0x0000000001F40000-0x0000000001F46000-memory.dmp

memory/3056-18-0x0000000000500000-0x000000000050F000-memory.dmp

memory/3056-26-0x0000000002150000-0x0000000002156000-memory.dmp

memory/3200-17-0x0000000000500000-0x000000000050F000-memory.dmp

memory/3056-27-0x0000000000500000-0x000000000050F000-memory.dmp