Malware Analysis Report

2025-01-18 12:59

Sample ID 240613-eb1k3stbkc
Target 2024-06-13_a4069a3ffa18917ea23e39806e290458_cryptolocker
SHA256 3a83ee9cfb1e820ea71be2b85b88599fdc871e110c23ab4d0fdf4ae65ad8bd08
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

3a83ee9cfb1e820ea71be2b85b88599fdc871e110c23ab4d0fdf4ae65ad8bd08

Threat Level: Known bad

The file 2024-06-13_a4069a3ffa18917ea23e39806e290458_cryptolocker was found to be: Known bad.

Malicious Activity Summary

upx

Detection of CryptoLocker Variants

UPX dump on OEP (original entry point)

Detection of CryptoLocker Variants

UPX dump on OEP (original entry point)

UPX packed file

Loads dropped DLL

Checks computer location settings

Executes dropped EXE

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-13 03:46

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

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
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-13 03:46

Reported

2024-06-13 03:49

Platform

win7-20240508-en

Max time kernel

144s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-13_a4069a3ffa18917ea23e39806e290458_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

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
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\lossy.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-13_a4069a3ffa18917ea23e39806e290458_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
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\2024-06-13_a4069a3ffa18917ea23e39806e290458_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-13_a4069a3ffa18917ea23e39806e290458_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp

Files

memory/2008-0-0x0000000008000000-0x000000000800E000-memory.dmp

memory/2008-1-0x0000000000520000-0x0000000000526000-memory.dmp

memory/2008-2-0x0000000001C90000-0x0000000001C96000-memory.dmp

memory/2008-9-0x0000000000520000-0x0000000000526000-memory.dmp

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

MD5 8207fffa0c0ed4b9d34e2d3f71239fa4
SHA1 5b9cedc2be34a2f83842e484ef5d05453fe40ed9
SHA256 7746f0d65808e86108d75947eb862200e922d4535c67e1f680e28a38ec659a28
SHA512 a9f02b972425e21cd7ca59e67420bd68b2aafa4a06c4445c2b9c8549c083d62ffe7442bf0626e0f84457d5c7e9a8a4ef8db013c36c235a47f2cea8ebb6bb16ae

memory/2008-13-0x0000000001DE0000-0x0000000001DEE000-memory.dmp

memory/2956-18-0x0000000008000000-0x000000000800E000-memory.dmp

memory/2008-17-0x0000000008000000-0x000000000800E000-memory.dmp

memory/2956-27-0x0000000000240000-0x0000000000246000-memory.dmp

memory/2956-20-0x0000000000280000-0x0000000000286000-memory.dmp

memory/2956-28-0x0000000008000000-0x000000000800E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-13 03:46

Reported

2024-06-13 03:49

Platform

win10v2004-20240508-en

Max time kernel

150s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-13_a4069a3ffa18917ea23e39806e290458_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

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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-06-13_a4069a3ffa18917ea23e39806e290458_cryptolocker.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\lossy.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\2024-06-13_a4069a3ffa18917ea23e39806e290458_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-13_a4069a3ffa18917ea23e39806e290458_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp

Files

memory/4160-0-0x0000000008000000-0x000000000800E000-memory.dmp

memory/4160-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

memory/4160-2-0x00000000020E0000-0x00000000020E6000-memory.dmp

memory/4160-9-0x00000000005A0000-0x00000000005A6000-memory.dmp

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

MD5 8207fffa0c0ed4b9d34e2d3f71239fa4
SHA1 5b9cedc2be34a2f83842e484ef5d05453fe40ed9
SHA256 7746f0d65808e86108d75947eb862200e922d4535c67e1f680e28a38ec659a28
SHA512 a9f02b972425e21cd7ca59e67420bd68b2aafa4a06c4445c2b9c8549c083d62ffe7442bf0626e0f84457d5c7e9a8a4ef8db013c36c235a47f2cea8ebb6bb16ae

memory/4160-18-0x0000000008000000-0x000000000800E000-memory.dmp

memory/1172-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

memory/1172-26-0x0000000000590000-0x0000000000596000-memory.dmp

memory/1172-27-0x0000000008000000-0x000000000800E000-memory.dmp