Malware Analysis Report

2025-03-15 07:44

Sample ID 240223-yr51aagb53
Target 96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7
SHA256 96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7
Tags
bootkit persistence isfb gozi
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

96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7

Threat Level: Known bad

The file 96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7 was found to be: Known bad.

Malicious Activity Summary

bootkit persistence isfb gozi

Gozi family

Loads dropped DLL

Writes to the Master Boot Record (MBR)

Enumerates connected drives

Unsigned PE

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-23 20:02

Signatures

Gozi family

gozi

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-23 20:02

Reported

2024-02-23 20:04

Platform

win7-20240221-en

Max time kernel

121s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7.exe"

Signatures

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7.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\96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7.exe

"C:\Users\Admin\AppData\Local\Temp\96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 master.etl.desktop.qq.com udp
CN 157.255.4.39:443 master.etl.desktop.qq.com tcp
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
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/2760-8-0x0000000000320000-0x000000000032A000-memory.dmp

memory/2760-9-0x0000000000320000-0x000000000032A000-memory.dmp

memory/2760-10-0x0000000000320000-0x000000000032A000-memory.dmp

memory/2760-11-0x0000000000320000-0x000000000032A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-23 20:02

Reported

2024-02-23 20:04

Platform

win10v2004-20240221-en

Max time kernel

93s

Max time network

94s

Command Line

"C:\Users\Admin\AppData\Local\Temp\96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7.exe"

Signatures

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7.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\96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7.exe

"C:\Users\Admin\AppData\Local\Temp\96444b071b03315a44958967d68d03d0aa1f66893238a8057e45f4671c825de7.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 master.etl.desktop.qq.com udp
US 8.8.8.8:53 oth.eve.mdt.qq.com udp
CN 157.255.4.39:443 master.etl.desktop.qq.com tcp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
SG 101.33.47.206:8081 oth.eve.mdt.qq.com tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 17.53.126.40.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 206.47.33.101.in-addr.arpa udp
US 8.8.8.8:53 204.178.17.96.in-addr.arpa udp
CN 157.255.4.39:443 master.etl.desktop.qq.com tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 140.71.91.104.in-addr.arpa udp
CN 113.105.95.120:443 tcp
US 8.8.8.8:53 191.178.17.96.in-addr.arpa udp
CN 125.39.120.82:443 tcp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp

Files

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

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