Malware Analysis Report

2025-08-05 09:42

Sample ID 240611-bjfzvsyajf
Target 2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker
SHA256 f50afaf32b4de0859d9ed5d7fa9c10203032e8ae5f2cbab16606713766b13c83
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

f50afaf32b4de0859d9ed5d7fa9c10203032e8ae5f2cbab16606713766b13c83

Threat Level: Known bad

The file 2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker was found to be: Known bad.

Malicious Activity Summary

upx

Detection of CryptoLocker Variants

Detection of Cryptolocker Samples

UPX dump on OEP (original entry point)

Detection of Cryptolocker Samples

UPX dump on OEP (original entry point)

Detection of CryptoLocker Variants

Executes dropped EXE

Loads dropped DLL

UPX packed file

Checks computer location settings

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-11 01:10

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

Detection of Cryptolocker Samples

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

2024-06-11 01:10

Reported

2024-06-11 01:12

Platform

win7-20240221-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_41e12fef682552006eb6b091f84cf435_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

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

Executes dropped EXE

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-11_41e12fef682552006eb6b091f84cf435_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

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 emrlogistics.com udp
US 54.209.32.212:443 emrlogistics.com tcp
US 52.71.57.184:443 emrlogistics.com tcp
US 54.209.32.212:443 emrlogistics.com tcp
US 52.71.57.184:443 emrlogistics.com tcp
US 54.209.32.212:443 emrlogistics.com tcp
US 52.71.57.184:443 emrlogistics.com tcp
US 54.209.32.212:443 emrlogistics.com tcp
US 52.71.57.184:443 emrlogistics.com tcp

Files

memory/2164-0-0x0000000000330000-0x0000000000336000-memory.dmp

memory/2164-1-0x0000000000500000-0x0000000000510000-memory.dmp

memory/2164-9-0x0000000000330000-0x0000000000336000-memory.dmp

memory/2164-2-0x0000000000370000-0x0000000000376000-memory.dmp

memory/2164-16-0x00000000006D0000-0x00000000006E0000-memory.dmp

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

MD5 6f6916a106036b9a313bd317b1af97c9
SHA1 17e935e47756a954bd892f384e9521123ecb8a04
SHA256 94cab0155fe1edff174c206015a26ced2e9d57b18366da88c667673294623a10
SHA512 276e2ee84ae44db7387c5a579edddcddece701fc70f93d99bbb3a5a9990073cf32c517d3465ca02d7304a4a3503a62441341354016beee3493c65dbe4f509c68

memory/2164-15-0x0000000000500000-0x0000000000510000-memory.dmp

memory/2272-18-0x0000000000500000-0x0000000000510000-memory.dmp

memory/2272-27-0x0000000000340000-0x0000000000346000-memory.dmp

memory/2272-20-0x0000000000380000-0x0000000000386000-memory.dmp

memory/2272-28-0x0000000000500000-0x0000000000510000-memory.dmp

memory/2164-29-0x00000000006D0000-0x00000000006E0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-11 01:10

Reported

2024-06-11 01:12

Platform

win10v2004-20240508-en

Max time kernel

150s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_41e12fef682552006eb6b091f84cf435_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

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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\asih.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_41e12fef682552006eb6b091f84cf435_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-11_41e12fef682552006eb6b091f84cf435_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 emrlogistics.com udp
US 8.8.8.8:53 emrlogistics.com udp
US 8.8.8.8:53 emrlogistics.com udp
US 8.8.8.8:53 emrlogistics.com udp
US 8.8.8.8:53 emrlogistics.com udp
US 8.8.8.8:53 emrlogistics.com udp
US 8.8.8.8:53 emrlogistics.com udp
US 8.8.8.8:53 emrlogistics.com udp
US 8.8.8.8:53 emrlogistics.com udp
US 8.8.8.8:53 emrlogistics.com udp
US 8.8.8.8:53 emrlogistics.com udp
US 8.8.8.8:53 emrlogistics.com udp
US 8.8.8.8:53 emrlogistics.com udp

Files

memory/1004-0-0x0000000000500000-0x0000000000510000-memory.dmp

memory/1004-1-0x0000000000660000-0x0000000000666000-memory.dmp

memory/1004-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

memory/1004-9-0x0000000000660000-0x0000000000666000-memory.dmp

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

MD5 6f6916a106036b9a313bd317b1af97c9
SHA1 17e935e47756a954bd892f384e9521123ecb8a04
SHA256 94cab0155fe1edff174c206015a26ced2e9d57b18366da88c667673294623a10
SHA512 276e2ee84ae44db7387c5a579edddcddece701fc70f93d99bbb3a5a9990073cf32c517d3465ca02d7304a4a3503a62441341354016beee3493c65dbe4f509c68

memory/3196-17-0x0000000000500000-0x0000000000510000-memory.dmp

memory/1004-18-0x0000000000500000-0x0000000000510000-memory.dmp

memory/3196-20-0x0000000000630000-0x0000000000636000-memory.dmp

memory/3196-21-0x0000000000660000-0x0000000000666000-memory.dmp

memory/3196-27-0x0000000000500000-0x0000000000510000-memory.dmp