Malware Analysis Report

2025-06-16 07:16

Sample ID 240602-a739madf27
Target 2024-06-02_cdcd4fd2a1334baaf591246721695dfd_cryptolocker
SHA256 b35cf07f9383c1c405d9a9644d15c304284bd5933d028e2b8f47be9db69d79a0
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

b35cf07f9383c1c405d9a9644d15c304284bd5933d028e2b8f47be9db69d79a0

Threat Level: Known bad

The file 2024-06-02_cdcd4fd2a1334baaf591246721695dfd_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

Checks computer location settings

Loads dropped DLL

UPX packed file

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-02 00:52

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 00:52

Reported

2024-06-02 00:54

Platform

win7-20240221-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_cdcd4fd2a1334baaf591246721695dfd_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_cdcd4fd2a1334baaf591246721695dfd_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_cdcd4fd2a1334baaf591246721695dfd_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_cdcd4fd2a1334baaf591246721695dfd_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/2696-0-0x0000000008000000-0x000000000800F000-memory.dmp

memory/2696-1-0x0000000000240000-0x0000000000246000-memory.dmp

memory/2696-2-0x00000000003C0000-0x00000000003C6000-memory.dmp

memory/2696-9-0x0000000000240000-0x0000000000246000-memory.dmp

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

MD5 650d41a6d4f0f62a71b0787f91721071
SHA1 80ec2bcea5848e880e615250eb6d072c014171d5
SHA256 40de92f1e3a68fec56b2f38694ca1c7543628b8099d7e3878164e7cf75c42d2a
SHA512 1980f0f8c25559dafde106d16f44c2729bb930fcd2695f50a2a219e4a7201ef1a75f4b0d2acaa2d79665838a993cda7503123f0ed0971950df5ad3b329e4773f

memory/2696-15-0x0000000008000000-0x000000000800F000-memory.dmp

memory/2828-17-0x0000000001C10000-0x0000000001C16000-memory.dmp

memory/2828-25-0x0000000008000000-0x000000000800F000-memory.dmp

memory/2828-24-0x0000000000260000-0x0000000000266000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-02 00:52

Reported

2024-06-02 00:54

Platform

win10v2004-20240426-en

Max time kernel

150s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_cdcd4fd2a1334baaf591246721695dfd_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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-06-02_cdcd4fd2a1334baaf591246721695dfd_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\2024-06-02_cdcd4fd2a1334baaf591246721695dfd_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_cdcd4fd2a1334baaf591246721695dfd_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 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 209.205.72.20.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 2ndry.com udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 2ndry.com udp
US 8.8.8.8:53 171.39.242.20.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 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 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 29.243.111.52.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 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 udp

Files

memory/400-0-0x0000000008000000-0x000000000800F000-memory.dmp

memory/400-1-0x0000000000450000-0x0000000000456000-memory.dmp

memory/400-2-0x0000000002060000-0x0000000002066000-memory.dmp

memory/400-9-0x0000000000450000-0x0000000000456000-memory.dmp

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

MD5 650d41a6d4f0f62a71b0787f91721071
SHA1 80ec2bcea5848e880e615250eb6d072c014171d5
SHA256 40de92f1e3a68fec56b2f38694ca1c7543628b8099d7e3878164e7cf75c42d2a
SHA512 1980f0f8c25559dafde106d16f44c2729bb930fcd2695f50a2a219e4a7201ef1a75f4b0d2acaa2d79665838a993cda7503123f0ed0971950df5ad3b329e4773f

memory/400-17-0x0000000008000000-0x000000000800F000-memory.dmp

memory/1368-19-0x0000000002050000-0x0000000002056000-memory.dmp

memory/1368-25-0x00000000021D0000-0x00000000021D6000-memory.dmp

memory/1368-26-0x0000000008000000-0x000000000800F000-memory.dmp