Malware Analysis Report

2024-10-24 17:55

Sample ID 240510-3al83aac58
Target f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117
SHA256 f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117
Tags
isfb gozi bootkit persistence
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

f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117

Threat Level: Known bad

The file f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117 was found to be: Known bad.

Malicious Activity Summary

isfb gozi bootkit persistence

Gozi family

Loads dropped DLL

Enumerates connected drives

Writes to the Master Boot Record (MBR)

Unsigned PE

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-10 23:18

Signatures

Gozi family

gozi

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-10 23:18

Reported

2024-05-10 23:21

Platform

win7-20231129-en

Max time kernel

119s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117.exe"

Signatures

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117.exe

"C:\Users\Admin\AppData\Local\Temp\f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 oth.eve.mdt.qq.com udp
US 8.8.8.8:53 master.etl.desktop.qq.com udp
CN 157.255.4.39:443 master.etl.desktop.qq.com tcp
SG 101.33.47.206:8081 oth.eve.mdt.qq.com tcp
CN 157.255.4.39:443 master.etl.desktop.qq.com tcp
CN 113.105.95.120:443 tcp
CN 125.39.120.82:443 tcp

Files

\Users\Admin\AppData\Local\Tencent\TxGameAssistant\TGBDownloader\dr.dll

MD5 2814acbd607ba47bdbcdf6ac3076ee95
SHA1 50ab892071bed2bb2365ca1d4bf5594e71c6b13b
SHA256 5904a7e4d97eeac939662c3638a0e145f64ff3dd0198f895c4bf0337595c6a67
SHA512 34c73014ffc8d38d6dd29f4f84c8f4f9ea971bc131f665f65b277f453504d5efc2d483a792cdea610c5e0544bf3997b132dcdbe37224912c5234c15cdb89d498

memory/1368-7-0x0000000000510000-0x000000000051A000-memory.dmp

memory/1368-6-0x0000000000510000-0x000000000051A000-memory.dmp

memory/1368-11-0x0000000000510000-0x000000000051A000-memory.dmp

memory/1368-10-0x0000000000510000-0x000000000051A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-10 23:18

Reported

2024-05-10 23:21

Platform

win10v2004-20240226-en

Max time kernel

141s

Max time network

164s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117.exe"

Signatures

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117.exe

"C:\Users\Admin\AppData\Local\Temp\f631acc686776ff8b89e85780f7c31591522480d764f02bd60520bcf4a42a117.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=5248 --field-trial-handle=2236,i,5367110156796017614,12594004256180761011,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 20.231.121.79:80 tcp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 13.107.246.64:443 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 master.etl.desktop.qq.com udp
US 8.8.8.8:53 oth.eve.mdt.qq.com udp
SG 101.33.47.206:8081 oth.eve.mdt.qq.com tcp
CN 157.255.4.39:443 master.etl.desktop.qq.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 206.47.33.101.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
CN 157.255.4.39:443 master.etl.desktop.qq.com tcp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
CN 113.105.95.120:443 tcp
CN 125.39.120.82:443 tcp
US 8.8.8.8:53 25.173.189.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Tencent\TxGameAssistant\TGBDownloader\dr.dll

MD5 2814acbd607ba47bdbcdf6ac3076ee95
SHA1 50ab892071bed2bb2365ca1d4bf5594e71c6b13b
SHA256 5904a7e4d97eeac939662c3638a0e145f64ff3dd0198f895c4bf0337595c6a67
SHA512 34c73014ffc8d38d6dd29f4f84c8f4f9ea971bc131f665f65b277f453504d5efc2d483a792cdea610c5e0544bf3997b132dcdbe37224912c5234c15cdb89d498