Malware Analysis Report

2025-08-05 09:42

Sample ID 240611-bl4hyayfmp
Target 2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker
SHA256 f8ee28eaf6a1172c9d7ce6bab74af535f67cbea04df9e99807acebe94b54fee4
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

f8ee28eaf6a1172c9d7ce6bab74af535f67cbea04df9e99807acebe94b54fee4

Threat Level: Known bad

The file 2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker was found to be: Known bad.

Malicious Activity Summary

upx

UPX dump on OEP (original entry point)

Detection of CryptoLocker Variants

UPX dump on OEP (original entry point)

Detection of CryptoLocker Variants

Loads dropped DLL

Checks computer location settings

UPX packed file

Executes dropped EXE

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-11 01:14

Signatures

Detection of CryptoLocker Variants

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

2024-06-11 01:14

Reported

2024-06-11 01:17

Platform

win7-20240221-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_cd41dad994ae88ad27fe9d660eea357f_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

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\2024-06-11_cd41dad994ae88ad27fe9d660eea357f_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\2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_cd41dad994ae88ad27fe9d660eea357f_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

Files

memory/2868-0-0x0000000008000000-0x000000000800F000-memory.dmp

memory/2868-1-0x0000000000320000-0x0000000000326000-memory.dmp

memory/2868-2-0x0000000001C90000-0x0000000001C96000-memory.dmp

memory/2868-9-0x0000000000320000-0x0000000000326000-memory.dmp

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

MD5 3f702b0cfdbb92521a24cf064923a12e
SHA1 f544076102e958490b32942a5f88e129d8edefb9
SHA256 644ea7282ac982e4d5e2a332e6f29677533a1691c3a2be8ca90512cf0d155996
SHA512 a029f0268b85e0b736ce29c1e3f805264679b35adbd59dadee4fc559aa9c751d9ab0a2968e561500ad2a6f7bb7a2400f1de6cf7f8785a1fdb429ab3b15680f78

memory/2868-14-0x0000000008000000-0x000000000800F000-memory.dmp

memory/1572-17-0x0000000000310000-0x0000000000316000-memory.dmp

memory/1572-24-0x00000000002C0000-0x00000000002C6000-memory.dmp

memory/1572-25-0x0000000008000000-0x000000000800F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-11 01:14

Reported

2024-06-11 01:17

Platform

win10v2004-20240508-en

Max time kernel

150s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_cd41dad994ae88ad27fe9d660eea357f_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

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-06-11_cd41dad994ae88ad27fe9d660eea357f_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
N/A N/A N/A N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-11_cd41dad994ae88ad27fe9d660eea357f_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_cd41dad994ae88ad27fe9d660eea357f_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/5016-0-0x0000000008000000-0x000000000800F000-memory.dmp

memory/5016-1-0x0000000001FC0000-0x0000000001FC6000-memory.dmp

memory/5016-2-0x0000000001FE0000-0x0000000001FE6000-memory.dmp

memory/5016-9-0x0000000001FC0000-0x0000000001FC6000-memory.dmp

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

MD5 3f702b0cfdbb92521a24cf064923a12e
SHA1 f544076102e958490b32942a5f88e129d8edefb9
SHA256 644ea7282ac982e4d5e2a332e6f29677533a1691c3a2be8ca90512cf0d155996
SHA512 a029f0268b85e0b736ce29c1e3f805264679b35adbd59dadee4fc559aa9c751d9ab0a2968e561500ad2a6f7bb7a2400f1de6cf7f8785a1fdb429ab3b15680f78

memory/5016-17-0x0000000008000000-0x000000000800F000-memory.dmp

memory/3680-18-0x0000000008000000-0x000000000800F000-memory.dmp

memory/3680-20-0x0000000000660000-0x0000000000666000-memory.dmp

memory/3680-26-0x0000000000640000-0x0000000000646000-memory.dmp

memory/3680-27-0x0000000008000000-0x000000000800F000-memory.dmp