Malware Analysis Report

2024-10-16 04:59

Sample ID 240602-meq5taba49
Target virussign.com_aa1f1c4fb3a851d59865993e808c50b0.vir
SHA256 8cb6ae47abc07ba60ce022f5b31821a9e587bd6beb14a39adc91e9cdb9f9a4b4
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

8cb6ae47abc07ba60ce022f5b31821a9e587bd6beb14a39adc91e9cdb9f9a4b4

Threat Level: Known bad

The file virussign.com_aa1f1c4fb3a851d59865993e808c50b0.vir was found to be: Known bad.

Malicious Activity Summary

backdoor trojan dropper berbew

Berbew family

Malware Dropper & Backdoor - Berbew

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-02 10:22

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

2024-06-02 10:22

Reported

2024-06-02 10:25

Platform

win7-20240508-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\virussign.com_aa1f1c4fb3a851d59865993e808c50b0.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\virussign.com_aa1f1c4fb3a851d59865993e808c50b0.exe N/A

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\virussign.com_aa1f1c4fb3a851d59865993e808c50b0.exe

"C:\Users\Admin\AppData\Local\Temp\virussign.com_aa1f1c4fb3a851d59865993e808c50b0.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/1368-0-0x0000000000470000-0x0000000000476000-memory.dmp

memory/1368-8-0x0000000000470000-0x0000000000476000-memory.dmp

memory/1368-1-0x0000000000480000-0x0000000000486000-memory.dmp

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

MD5 3e140d5c5f2fad30d21655edc4b1c5f1
SHA1 a3ed05d6c4e30af90f26fc68a4b639793bbca816
SHA256 f0b23e1c2105c1c3be9703e7fed8b1a03e1c2487d8264a1e84d6481f5e36ee17
SHA512 55dcbd8391cc7a390eab9729f19da90893ac6be98b555a2cb82895ff9e1867057df15f14ebdb095e5863b17541409847c65b6b29062a0992bc8e873720c0a9c0

memory/2324-15-0x00000000003B0000-0x00000000003B6000-memory.dmp

memory/2324-22-0x00000000003A0000-0x00000000003A6000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-02 10:22

Reported

2024-06-02 10:25

Platform

win10v2004-20240226-en

Max time kernel

151s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\virussign.com_aa1f1c4fb3a851d59865993e808c50b0.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\virussign.com_aa1f1c4fb3a851d59865993e808c50b0.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\virussign.com_aa1f1c4fb3a851d59865993e808c50b0.exe

"C:\Users\Admin\AppData\Local\Temp\virussign.com_aa1f1c4fb3a851d59865993e808c50b0.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=4076 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 152.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa 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 mytarta.com udp
GB 23.44.234.16:80 tcp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 mytarta.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 mytarta.com udp
US 13.107.253.64:443 tcp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 164.189.21.2.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 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 224.107.17.2.in-addr.arpa 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 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 8.8.8.8:53 226.162.46.104.in-addr.arpa udp
US 8.8.8.8:53 mytarta.com udp
US 8.8.8.8:53 mytarta.com udp

Files

memory/824-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

memory/824-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

memory/824-2-0x0000000003150000-0x0000000003156000-memory.dmp

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

MD5 3e140d5c5f2fad30d21655edc4b1c5f1
SHA1 a3ed05d6c4e30af90f26fc68a4b639793bbca816
SHA256 f0b23e1c2105c1c3be9703e7fed8b1a03e1c2487d8264a1e84d6481f5e36ee17
SHA512 55dcbd8391cc7a390eab9729f19da90893ac6be98b555a2cb82895ff9e1867057df15f14ebdb095e5863b17541409847c65b6b29062a0992bc8e873720c0a9c0

memory/3736-17-0x0000000003010000-0x0000000003016000-memory.dmp