Malware Analysis Report

2025-06-16 07:25

Sample ID 240602-fgb1cacb96
Target 2024-06-02_f83e6ecd31e75a62d9d8337045579c97_cryptolocker
SHA256 5f838b4b1e182422b6fd26c45e8b250366fd2a938602f1551d5fbfce131f6094
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

5f838b4b1e182422b6fd26c45e8b250366fd2a938602f1551d5fbfce131f6094

Threat Level: Known bad

The file 2024-06-02_f83e6ecd31e75a62d9d8337045579c97_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

Loads dropped DLL

Checks computer location settings

UPX packed file

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-02 04:50

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

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

2024-06-02 04:50

Reported

2024-06-02 04:52

Platform

win7-20240508-en

Max time kernel

149s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_f83e6ecd31e75a62d9d8337045579c97_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\hasfj.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\2024-06-02_f83e6ecd31e75a62d9d8337045579c97_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\2024-06-02_f83e6ecd31e75a62d9d8337045579c97_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_f83e6ecd31e75a62d9d8337045579c97_cryptolocker.exe"

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

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

Network

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

Files

memory/2936-0-0x0000000008000000-0x000000000800E000-memory.dmp

memory/2936-2-0x0000000001CB0000-0x0000000001CB6000-memory.dmp

memory/2936-9-0x0000000001CA0000-0x0000000001CA6000-memory.dmp

memory/2936-1-0x0000000001CA0000-0x0000000001CA6000-memory.dmp

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

MD5 4a3defde3c75af9a87a61ff83377cb95
SHA1 786532c957f305f0508c40a57ca1167947d23f55
SHA256 f465350a7ce0298d4a68a655652dd199bb06f4b3edce8e67244dd5094930a726
SHA512 1e95269144a13b468323f8f4d17b6bb60e3d1b1240a7540845fce3cec2615744d256c32f84576fe0507988fb439f65336168e03393ac38eabca6312c23177fcd

memory/1720-17-0x0000000008000000-0x000000000800E000-memory.dmp

memory/2936-16-0x0000000008000000-0x000000000800E000-memory.dmp

memory/1720-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

memory/1720-26-0x00000000004C0000-0x00000000004C6000-memory.dmp

memory/1720-27-0x0000000008000000-0x000000000800E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-02 04:50

Reported

2024-06-02 04:52

Platform

win10v2004-20240508-en

Max time kernel

150s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_f83e6ecd31e75a62d9d8337045579c97_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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2024-06-02_f83e6ecd31e75a62d9d8337045579c97_cryptolocker.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\hasfj.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_f83e6ecd31e75a62d9d8337045579c97_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-02_f83e6ecd31e75a62d9d8337045579c97_cryptolocker.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 91.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 mytarta.com udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
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 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 90.16.208.104.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/3892-0-0x0000000008000000-0x000000000800E000-memory.dmp

memory/3892-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

memory/3892-2-0x0000000003150000-0x0000000003156000-memory.dmp

memory/3892-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

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

MD5 4a3defde3c75af9a87a61ff83377cb95
SHA1 786532c957f305f0508c40a57ca1167947d23f55
SHA256 f465350a7ce0298d4a68a655652dd199bb06f4b3edce8e67244dd5094930a726
SHA512 1e95269144a13b468323f8f4d17b6bb60e3d1b1240a7540845fce3cec2615744d256c32f84576fe0507988fb439f65336168e03393ac38eabca6312c23177fcd

memory/3892-16-0x0000000008000000-0x000000000800E000-memory.dmp

memory/1564-18-0x0000000008000000-0x000000000800E000-memory.dmp

memory/1564-26-0x0000000008000000-0x000000000800E000-memory.dmp