Malware Analysis Report

2025-04-14 03:49

Sample ID 240612-xc1xcavhqh
Target 2024-06-12_b9ed6fd0642a149f0c9656564acd4ba8_cryptolocker
SHA256 c8edce37884bc1f858b8cbbdb1c84589ae098825a0921683a288a0b4eead90f4
Tags
upx
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

c8edce37884bc1f858b8cbbdb1c84589ae098825a0921683a288a0b4eead90f4

Threat Level: Known bad

The file 2024-06-12_b9ed6fd0642a149f0c9656564acd4ba8_cryptolocker was found to be: Known bad.

Malicious Activity Summary

upx

Detection of Cryptolocker Samples

UPX dump on OEP (original entry point)

Detection of CryptoLocker Variants

UPX dump on OEP (original entry point)

Detection of CryptoLocker Variants

Detection of Cryptolocker Samples

Executes dropped EXE

Checks computer location settings

UPX packed file

Loads dropped DLL

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-12 18:43

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

UPX dump on OEP (original entry point)

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

UPX packed file

upx
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

2024-06-12 18:43

Reported

2024-06-12 18:45

Platform

win7-20240508-en

Max time kernel

144s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_b9ed6fd0642a149f0c9656564acd4ba8_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

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

UPX dump on OEP (original entry point)

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

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\2024-06-12_b9ed6fd0642a149f0c9656564acd4ba8_cryptolocker.exe N/A

UPX packed file

upx
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

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_b9ed6fd0642a149f0c9656564acd4ba8_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_b9ed6fd0642a149f0c9656564acd4ba8_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
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/1964-1-0x00000000004B0000-0x00000000004B6000-memory.dmp

memory/1964-9-0x0000000000470000-0x0000000000476000-memory.dmp

memory/1964-8-0x0000000000500000-0x0000000000510000-memory.dmp

memory/1964-0-0x0000000000470000-0x0000000000476000-memory.dmp

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

MD5 8d96957115eef55d0d913f1d3468ae2f
SHA1 4967a7775283ebf16415a30090c8823df7fb8d71
SHA256 bc840d30275477115a405893af9512b080f5fa48eab5e26f20d512281b951aea
SHA512 a613099dbf744f59161f1907b7d856c2c5f88ddd8f01fa1062e611ab993daf972663bc3b13a103d7601cc2ee7b04dc9b4fbda927944be5998f7b580d6bb6183d

memory/2952-15-0x0000000000500000-0x0000000000510000-memory.dmp

memory/2952-17-0x0000000000460000-0x0000000000466000-memory.dmp

memory/2952-24-0x0000000000320000-0x0000000000326000-memory.dmp

memory/2952-25-0x0000000000500000-0x0000000000510000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 18:43

Reported

2024-06-12 18:45

Platform

win10v2004-20240508-en

Max time kernel

150s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_b9ed6fd0642a149f0c9656564acd4ba8_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

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

UPX dump on OEP (original entry point)

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-06-12_b9ed6fd0642a149f0c9656564acd4ba8_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

UPX packed file

upx
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

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_b9ed6fd0642a149f0c9656564acd4ba8_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_b9ed6fd0642a149f0c9656564acd4ba8_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
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 52.111.229.43:443 tcp
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/3244-0-0x0000000000500000-0x0000000000510000-memory.dmp

memory/3244-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

memory/3244-9-0x00000000006B0000-0x00000000006B6000-memory.dmp

memory/3244-2-0x00000000006D0000-0x00000000006D6000-memory.dmp

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

MD5 8d96957115eef55d0d913f1d3468ae2f
SHA1 4967a7775283ebf16415a30090c8823df7fb8d71
SHA256 bc840d30275477115a405893af9512b080f5fa48eab5e26f20d512281b951aea
SHA512 a613099dbf744f59161f1907b7d856c2c5f88ddd8f01fa1062e611ab993daf972663bc3b13a103d7601cc2ee7b04dc9b4fbda927944be5998f7b580d6bb6183d

memory/3244-24-0x0000000000500000-0x0000000000510000-memory.dmp

memory/2452-25-0x00000000005B0000-0x00000000005B6000-memory.dmp

memory/2452-18-0x00000000005D0000-0x00000000005D6000-memory.dmp

memory/2452-26-0x0000000000500000-0x0000000000510000-memory.dmp