Malware Analysis Report

2025-06-16 07:28

Sample ID 240602-ff4c7scb92
Target 2024-06-02_f5ef3878a215808de9842f5df3174c06_cryptolocker
SHA256 1f806b21c34c0510c5b9041e36e6f7b14800b8f59eb1d3683f24eef41b176146
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

1f806b21c34c0510c5b9041e36e6f7b14800b8f59eb1d3683f24eef41b176146

Threat Level: Known bad

The file 2024-06-02_f5ef3878a215808de9842f5df3174c06_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)

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

UPX packed file

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-02 04:49

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

2024-06-02 04:49

Reported

2024-06-02 04:52

Platform

win7-20231129-en

Max time kernel

149s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_f5ef3878a215808de9842f5df3174c06_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\2024-06-02_f5ef3878a215808de9842f5df3174c06_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\2024-06-02_f5ef3878a215808de9842f5df3174c06_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_f5ef3878a215808de9842f5df3174c06_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/1688-0-0x0000000008000000-0x000000000800F000-memory.dmp

memory/1688-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

memory/1688-2-0x0000000000310000-0x0000000000316000-memory.dmp

memory/1688-8-0x00000000002C0000-0x00000000002C6000-memory.dmp

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

MD5 095fbbc4d1384c2791faeea0b0cfb189
SHA1 cee651161a81fd64a909e5219d954eaef6a408ee
SHA256 5a0902a28c4e2450e527f896d9598c5c868d9acc8b0f28ce3d6f257fb6878b7c
SHA512 0814f57573e5f8a96d7c6e273e05268f2e199244b04a15b8c58bc594ccfae8722ebc68999bf15b383612c3deab550ef296a05d9ffa77149d129f33bcb0cba212

memory/1688-15-0x0000000008000000-0x000000000800F000-memory.dmp

memory/1756-24-0x00000000001D0000-0x00000000001D6000-memory.dmp

memory/1756-17-0x0000000000290000-0x0000000000296000-memory.dmp

memory/1756-25-0x0000000008000000-0x000000000800F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-02 04:49

Reported

2024-06-02 04:52

Platform

win10v2004-20240508-en

Max time kernel

150s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_f5ef3878a215808de9842f5df3174c06_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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-06-02_f5ef3878a215808de9842f5df3174c06_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\2024-06-02_f5ef3878a215808de9842f5df3174c06_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_f5ef3878a215808de9842f5df3174c06_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 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa 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 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 31.251.17.2.in-addr.arpa 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 8.8.8.8:53 172.210.232.199.in-addr.arpa 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 43.58.199.20.in-addr.arpa 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 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa 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 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
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/736-0-0x0000000008000000-0x000000000800F000-memory.dmp

memory/736-1-0x0000000000620000-0x0000000000626000-memory.dmp

memory/736-3-0x0000000000640000-0x0000000000646000-memory.dmp

memory/736-2-0x0000000000620000-0x0000000000626000-memory.dmp

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

MD5 095fbbc4d1384c2791faeea0b0cfb189
SHA1 cee651161a81fd64a909e5219d954eaef6a408ee
SHA256 5a0902a28c4e2450e527f896d9598c5c868d9acc8b0f28ce3d6f257fb6878b7c
SHA512 0814f57573e5f8a96d7c6e273e05268f2e199244b04a15b8c58bc594ccfae8722ebc68999bf15b383612c3deab550ef296a05d9ffa77149d129f33bcb0cba212

memory/1248-17-0x0000000008000000-0x000000000800F000-memory.dmp

memory/1248-20-0x00000000020E0000-0x00000000020E6000-memory.dmp

memory/736-19-0x0000000008000000-0x000000000800F000-memory.dmp

memory/1248-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

memory/1248-27-0x0000000008000000-0x000000000800F000-memory.dmp