Malware Analysis Report

2025-01-23 05:04

Sample ID 240522-xvr26adc69
Target 20240522fbf553cdb875f52b97a7fd46214e62eacryptolocker
SHA256 05566346a9e66e8d4b072101a1835e4a2c7275a2d27627736f7281f29677db3d
Tags
backdoor trojan dropper berbew
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

05566346a9e66e8d4b072101a1835e4a2c7275a2d27627736f7281f29677db3d

Threat Level: Known bad

The file 20240522fbf553cdb875f52b97a7fd46214e62eacryptolocker was found to be: Known bad.

Malicious Activity Summary

backdoor trojan dropper berbew

Berbew family

Malware Dropper & Backdoor - Berbew

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Enumerates physical storage devices

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-22 19:10

Signatures

Berbew family

berbew

Malware Dropper & Backdoor - Berbew

backdoor trojan dropper
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

2024-05-22 19:10

Reported

2024-05-22 19:13

Platform

win7-20240419-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\20240522fbf553cdb875f52b97a7fd46214e62eacryptolocker.exe"

Signatures

Malware Dropper & Backdoor - Berbew

backdoor trojan dropper
Description Indicator Process Target
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\20240522fbf553cdb875f52b97a7fd46214e62eacryptolocker.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\20240522fbf553cdb875f52b97a7fd46214e62eacryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\20240522fbf553cdb875f52b97a7fd46214e62eacryptolocker.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/2288-7-0x0000000000470000-0x0000000000476000-memory.dmp

memory/2288-1-0x0000000000480000-0x0000000000486000-memory.dmp

memory/2288-0-0x0000000000470000-0x0000000000476000-memory.dmp

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

MD5 8f688281d0a43fc7493ac07669afe540
SHA1 2a8b6878c4e247af51be031ad8af811ece96f02b
SHA256 af3a95ac4c6a6897daccde5a68c71744ca76a8b703e026d7cb017859280a78a9
SHA512 39cb82611948afeea139f92bd12465fdcab59cd98efa95367f83e1b53ef377bf5fe4a2f604950b3d60d633e3f2ba1c57219971b8556c40a275854daebc7845aa

memory/2096-15-0x0000000000390000-0x0000000000396000-memory.dmp

memory/2096-22-0x0000000000380000-0x0000000000386000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-22 19:10

Reported

2024-05-22 19:13

Platform

win10v2004-20240508-en

Max time kernel

150s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\20240522fbf553cdb875f52b97a7fd46214e62eacryptolocker.exe"

Signatures

Malware Dropper & Backdoor - Berbew

backdoor trojan dropper
Description Indicator Process Target
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\20240522fbf553cdb875f52b97a7fd46214e62eacryptolocker.exe N/A

Executes dropped EXE

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

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\20240522fbf553cdb875f52b97a7fd46214e62eacryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\20240522fbf553cdb875f52b97a7fd46214e62eacryptolocker.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 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 mytarta.com udp
NL 23.62.61.129:443 www.bing.com tcp
US 8.8.8.8:53 129.61.62.23.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 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 100.58.20.217.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 8.8.8.8:53 234.197.17.2.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 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 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.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 43.58.199.20.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 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

Files

memory/3136-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

memory/3136-1-0x0000000003150000-0x0000000003156000-memory.dmp

memory/3136-8-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

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

MD5 8f688281d0a43fc7493ac07669afe540
SHA1 2a8b6878c4e247af51be031ad8af811ece96f02b
SHA256 af3a95ac4c6a6897daccde5a68c71744ca76a8b703e026d7cb017859280a78a9
SHA512 39cb82611948afeea139f92bd12465fdcab59cd98efa95367f83e1b53ef377bf5fe4a2f604950b3d60d633e3f2ba1c57219971b8556c40a275854daebc7845aa

memory/2892-17-0x0000000002ED0000-0x0000000002ED6000-memory.dmp

memory/2892-23-0x0000000001F90000-0x0000000001F96000-memory.dmp