Malware Analysis Report

2025-08-05 15:36

Sample ID 240527-pcmqqabb9x
Target 2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker
SHA256 b21bc8fc04310760c0d5595516e1b80bdc402a0d15f1fd71b9869de65307d163
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

b21bc8fc04310760c0d5595516e1b80bdc402a0d15f1fd71b9869de65307d163

Threat Level: Known bad

The file 2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker was found to be: Known bad.

Malicious Activity Summary

upx

Detection of CryptoLocker Variants

UPX dump on OEP (original entry point)

UPX dump on OEP (original entry point)

Detection of CryptoLocker Variants

Executes dropped EXE

Checks computer location settings

UPX packed file

Loads dropped DLL

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-27 12:11

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

2024-05-27 12:11

Reported

2024-05-27 12:13

Platform

win7-20240221-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-27_6584819104e2fceda94f06fa7ac7d556_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

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\2024-05-27_6584819104e2fceda94f06fa7ac7d556_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\2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-27_6584819104e2fceda94f06fa7ac7d556_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/2036-0-0x0000000008000000-0x000000000800F000-memory.dmp

memory/2036-1-0x0000000000240000-0x0000000000246000-memory.dmp

memory/2036-2-0x0000000000610000-0x0000000000616000-memory.dmp

memory/2036-9-0x0000000000240000-0x0000000000246000-memory.dmp

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

MD5 707ccc6d7a4b65ba6e8a54c11836455b
SHA1 95b1622b3b743e92300a5e3cf5f89ea7f6e2d176
SHA256 ca0a52961524eef42a878c8fa067626aa0ae97cb8d3316f204639a571fe0a001
SHA512 b444b490cddd382e6edf4ba119244008c16dbc9a101049c82de5cc2a077885cd67cec991218daf924d9f69700dde858e24cd74217b2d2d4bd5f27a09b388386d

memory/2036-16-0x0000000008000000-0x000000000800F000-memory.dmp

memory/2036-13-0x0000000001C70000-0x0000000001C7F000-memory.dmp

memory/2520-18-0x00000000004A0000-0x00000000004A6000-memory.dmp

memory/2520-26-0x0000000008000000-0x000000000800F000-memory.dmp

memory/2520-25-0x0000000000300000-0x0000000000306000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-27 12:11

Reported

2024-05-27 12:13

Platform

win10v2004-20240426-en

Max time kernel

150s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-05-27_6584819104e2fceda94f06fa7ac7d556_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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-05-27_6584819104e2fceda94f06fa7ac7d556_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\2024-05-27_6584819104e2fceda94f06fa7ac7d556_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-05-27_6584819104e2fceda94f06fa7ac7d556_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 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 18.24.18.2.in-addr.arpa udp
US 8.8.8.8:53 14.160.190.20.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 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.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 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.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 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 25.24.18.2.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.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 2ndry.com udp
US 8.8.8.8:53 2ndry.com udp

Files

memory/1232-0-0x0000000008000000-0x000000000800F000-memory.dmp

memory/1232-1-0x0000000000730000-0x0000000000736000-memory.dmp

memory/1232-3-0x0000000000750000-0x0000000000756000-memory.dmp

memory/1232-9-0x0000000000730000-0x0000000000736000-memory.dmp

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

MD5 707ccc6d7a4b65ba6e8a54c11836455b
SHA1 95b1622b3b743e92300a5e3cf5f89ea7f6e2d176
SHA256 ca0a52961524eef42a878c8fa067626aa0ae97cb8d3316f204639a571fe0a001
SHA512 b444b490cddd382e6edf4ba119244008c16dbc9a101049c82de5cc2a077885cd67cec991218daf924d9f69700dde858e24cd74217b2d2d4bd5f27a09b388386d

memory/2792-18-0x0000000008000000-0x000000000800F000-memory.dmp

memory/1232-17-0x0000000008000000-0x000000000800F000-memory.dmp

memory/2792-20-0x0000000000660000-0x0000000000666000-memory.dmp

memory/2792-26-0x0000000000640000-0x0000000000646000-memory.dmp

memory/2792-27-0x0000000008000000-0x000000000800F000-memory.dmp