Malware Analysis Report

2025-01-22 18:49

Sample ID 240322-wrnpwseg46
Target 640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73
SHA256 640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73
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

640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73

Threat Level: Known bad

The file 640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73 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

2024-03-22 18:09

Signatures

Gozi family

gozi

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-22 18:09

Reported

2024-03-22 18:12

Platform

win7-20240221-en

Max time kernel

121s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73.exe"

Signatures

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73.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\640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73.exe

"C:\Users\Admin\AppData\Local\Temp\640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73.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
SG 101.33.47.68:8081 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/2240-5-0x0000000000260000-0x000000000026A000-memory.dmp

memory/2240-4-0x0000000000260000-0x000000000026A000-memory.dmp

memory/2240-10-0x0000000000260000-0x000000000026A000-memory.dmp

memory/2240-11-0x0000000000260000-0x000000000026A000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-22 18:09

Reported

2024-03-22 18:12

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73.exe"

Signatures

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73.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\640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73.exe

"C:\Users\Admin\AppData\Local\Temp\640d5ac6695a77c1a1f3c44731841322590229378da4f115b5ec5a9c17e5fa73.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
SG 101.33.47.68:8081 oth.eve.mdt.qq.com tcp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 68.47.33.101.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 193.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 195.177.78.104.in-addr.arpa udp
US 8.8.8.8:53 140.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 202.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 32.134.221.88.in-addr.arpa udp
CN 157.255.4.39:443 master.etl.desktop.qq.com tcp
US 8.8.8.8:53 192.230.140.95.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
CN 113.105.95.120:443 tcp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 189.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 128.230.140.95.in-addr.arpa udp
CN 125.39.120.82:443 tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
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 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp

Files

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

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