Malware Analysis Report

2025-04-14 03:46

Sample ID 240612-xgk2pawbka
Target 2024-06-12_ef1b6f05471066e3ef54f455a29d79a1_cryptolocker
SHA256 109c476e7029a7f6f3423c5ed4af67b8992ad73a4f92ebc38451b5e8b0341437
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

109c476e7029a7f6f3423c5ed4af67b8992ad73a4f92ebc38451b5e8b0341437

Threat Level: Known bad

The file 2024-06-12_ef1b6f05471066e3ef54f455a29d79a1_cryptolocker was found to be: Known bad.

Malicious Activity Summary

upx

Detection of Cryptolocker Samples

UPX dump on OEP (original entry point)

Detection of CryptoLocker Variants

Detection of CryptoLocker Variants

Detection of Cryptolocker Samples

UPX dump on OEP (original entry point)

UPX packed file

Executes dropped EXE

Checks computer location settings

Loads dropped DLL

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-12 18:49

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

2024-06-12 18:49

Reported

2024-06-12 18:52

Platform

win7-20240508-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_ef1b6f05471066e3ef54f455a29d79a1_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\2024-06-12_ef1b6f05471066e3ef54f455a29d79a1_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\2024-06-12_ef1b6f05471066e3ef54f455a29d79a1_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_ef1b6f05471066e3ef54f455a29d79a1_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/2168-0-0x0000000000500000-0x0000000000510000-memory.dmp

memory/2168-1-0x0000000000280000-0x0000000000286000-memory.dmp

memory/2168-2-0x00000000003C0000-0x00000000003C6000-memory.dmp

memory/2168-9-0x0000000000280000-0x0000000000286000-memory.dmp

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

MD5 83a13a523f26e7315536e08edd61f11a
SHA1 a115c13075fb0f9b2b542b2f5d86520ec6d82cd7
SHA256 b4cb1228fad5380f97c8e144e34e52f6be52f795ef63854f618076c82d7df09d
SHA512 a3b5810a9ca0e71305a10180011cc72ffdae73b49b62d5a7316ad9c7db9f131fc769f7c12fd7f06f982f8b80d906f4c03f1a0610f6355d51a36d458b61bad71d

memory/2168-16-0x0000000000500000-0x0000000000510000-memory.dmp

memory/1824-17-0x0000000000500000-0x0000000000510000-memory.dmp

memory/1824-26-0x0000000000320000-0x0000000000326000-memory.dmp

memory/1824-19-0x00000000004A0000-0x00000000004A6000-memory.dmp

memory/1824-27-0x0000000000500000-0x0000000000510000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 18:49

Reported

2024-06-12 18:52

Platform

win10v2004-20240508-en

Max time kernel

150s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_ef1b6f05471066e3ef54f455a29d79a1_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\2024-06-12_ef1b6f05471066e3ef54f455a29d79a1_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\2024-06-12_ef1b6f05471066e3ef54f455a29d79a1_cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_ef1b6f05471066e3ef54f455a29d79a1_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/4476-0-0x0000000000500000-0x0000000000510000-memory.dmp

memory/4476-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

memory/4476-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

memory/4476-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

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

MD5 83a13a523f26e7315536e08edd61f11a
SHA1 a115c13075fb0f9b2b542b2f5d86520ec6d82cd7
SHA256 b4cb1228fad5380f97c8e144e34e52f6be52f795ef63854f618076c82d7df09d
SHA512 a3b5810a9ca0e71305a10180011cc72ffdae73b49b62d5a7316ad9c7db9f131fc769f7c12fd7f06f982f8b80d906f4c03f1a0610f6355d51a36d458b61bad71d

memory/4372-18-0x0000000000500000-0x0000000000510000-memory.dmp

memory/4476-17-0x0000000000500000-0x0000000000510000-memory.dmp

memory/4372-20-0x0000000002090000-0x0000000002096000-memory.dmp

memory/4372-26-0x0000000000680000-0x0000000000686000-memory.dmp

memory/4372-27-0x0000000000500000-0x0000000000510000-memory.dmp