Malware Analysis Report

2025-01-23 03:59

Sample ID 240522-wwzmysbe91
Target 202405229b0d5ae58d99a1e1fd4bd1cb17745374cryptolocker
SHA256 20406ebaaa226083e30d73c77ac3c2c973b441ec920e5af75bca1ea55809f7f0
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

20406ebaaa226083e30d73c77ac3c2c973b441ec920e5af75bca1ea55809f7f0

Threat Level: Known bad

The file 202405229b0d5ae58d99a1e1fd4bd1cb17745374cryptolocker 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

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-22 18:17

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 18:16

Reported

2024-05-22 18:19

Platform

win7-20240508-en

Max time kernel

150s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\202405229b0d5ae58d99a1e1fd4bd1cb17745374cryptolocker.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\202405229b0d5ae58d99a1e1fd4bd1cb17745374cryptolocker.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\202405229b0d5ae58d99a1e1fd4bd1cb17745374cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\202405229b0d5ae58d99a1e1fd4bd1cb17745374cryptolocker.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/1196-0-0x0000000000570000-0x0000000000576000-memory.dmp

memory/1196-8-0x0000000000570000-0x0000000000576000-memory.dmp

memory/1196-1-0x0000000000580000-0x0000000000586000-memory.dmp

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

MD5 92a632dbf64dfcccb98e19eb92b601e8
SHA1 1d86c5124b7b63ae0486256de75f20f6a5105e0a
SHA256 9ad5863f85bdffba0b97b4255fe7b39b6629767e54e434fcffb7247ba1294c20
SHA512 68ad39908e01cb5233cd46facb6134ca5e600c424a14ba39237a219e4b5e76dd4418d255f919e5f83bf189b2755f723c3540467cbc8d9e13c7e717065c7fac6f

memory/2164-21-0x0000000000320000-0x0000000000326000-memory.dmp

memory/2164-15-0x0000000000330000-0x0000000000336000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-22 18:16

Reported

2024-05-22 18:19

Platform

win10v2004-20240226-en

Max time kernel

151s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\202405229b0d5ae58d99a1e1fd4bd1cb17745374cryptolocker.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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\202405229b0d5ae58d99a1e1fd4bd1cb17745374cryptolocker.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\202405229b0d5ae58d99a1e1fd4bd1cb17745374cryptolocker.exe

"C:\Users\Admin\AppData\Local\Temp\202405229b0d5ae58d99a1e1fd4bd1cb17745374cryptolocker.exe"

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

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

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3732 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 58.55.71.13.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 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 13.107.253.64:443 tcp
US 8.8.8.8:53 133.211.185.52.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 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
NL 52.142.223.178:80 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 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 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 mytarta.com udp
US 8.8.8.8:53 89.16.208.104.in-addr.arpa udp
US 8.8.8.8:53 mytarta.com udp

Files

memory/412-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

memory/412-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

memory/412-2-0x0000000003150000-0x0000000003156000-memory.dmp

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

MD5 92a632dbf64dfcccb98e19eb92b601e8
SHA1 1d86c5124b7b63ae0486256de75f20f6a5105e0a
SHA256 9ad5863f85bdffba0b97b4255fe7b39b6629767e54e434fcffb7247ba1294c20
SHA512 68ad39908e01cb5233cd46facb6134ca5e600c424a14ba39237a219e4b5e76dd4418d255f919e5f83bf189b2755f723c3540467cbc8d9e13c7e717065c7fac6f

memory/4256-17-0x0000000003010000-0x0000000003016000-memory.dmp

memory/4256-23-0x0000000002D60000-0x0000000002D66000-memory.dmp