Malware Analysis Report

2025-06-15 23:35

Sample ID 241031-tk2bas1fqm
Target 9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82
SHA256 9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82
Tags
bootkit discovery persistence
score
7/10

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
7/10

SHA256

9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82

Threat Level: Shows suspicious behavior

The file 9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82 was found to be: Shows suspicious behavior.

Malicious Activity Summary

bootkit discovery persistence

Loads dropped DLL

Enumerates connected drives

Writes to the Master Boot Record (MBR)

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-31 16:07

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-31 16:07

Reported

2024-10-31 16:10

Platform

win7-20240708-en

Max time kernel

120s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82.exe"

Signatures

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82.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\9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82.exe

"C:\Users\Admin\AppData\Local\Temp\9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 master.etl.desktop.qq.com udp
US 8.8.8.8:53 down.pc.yyb.qq.com udp
US 8.8.8.8:53 oth.eve.mdt.qq.com udp
US 8.8.8.8:53 oth.eve.mdt.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
SG 101.33.47.206:8081 oth.eve.mdt.qq.com tcp
SG 101.33.47.68:8081 oth.eve.mdt.qq.com tcp
GB 43.132.64.190:443 down.pc.yyb.qq.com tcp
GB 43.132.64.190:443 down.pc.yyb.qq.com tcp
SG 101.33.47.68:8081 oth.eve.mdt.qq.com tcp
SG 101.33.47.68:8081 oth.eve.mdt.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 dccc58e47d693a626fe384b86f3ee094
SHA1 2debd41ee7cce88f1ba19768185328a1eed6e841
SHA256 cf42d5b750058d2fe19016db401ee26f6f2ec51a618f68ed231de88cc23cb50e
SHA512 f00d631c3c8c0d2b54a25aa05dc3b863278859c0a1b96293fd1702c6ac0e5aeb4c5daed4ca7378fc9ca5c8f5918b02a3ba19707fe991bf76766575f109fc6d4f

memory/1244-4-0x0000000000160000-0x000000000016A000-memory.dmp

memory/1244-5-0x0000000000160000-0x000000000016A000-memory.dmp

memory/1244-18-0x0000000000160000-0x000000000016A000-memory.dmp

memory/1244-17-0x0000000000160000-0x000000000016A000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\CabF5D6.tmp

MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

C:\Users\Admin\AppData\Local\Temp\TarF5E8.tmp

MD5 4ea6026cf93ec6338144661bf1202cd1
SHA1 a1dec9044f750ad887935a01430bf49322fbdcb7
SHA256 8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8
SHA512 6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-31 16:07

Reported

2024-10-31 16:10

Platform

win10v2004-20241007-en

Max time kernel

141s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82.exe"

Signatures

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82.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\9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82.exe

"C:\Users\Admin\AppData\Local\Temp\9445db62b83c4c8b11ea3f797152184327179b4ace61f2a91932095e2e513b82.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 oth.eve.mdt.qq.com udp
US 8.8.8.8:53 down.pc.yyb.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
GB 43.132.64.190:443 down.pc.yyb.qq.com tcp
SG 101.33.47.68:8081 oth.eve.mdt.qq.com tcp
SG 101.33.47.68:8081 oth.eve.mdt.qq.com tcp
SG 101.33.47.68:8081 oth.eve.mdt.qq.com tcp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 190.64.132.43.in-addr.arpa udp
SG 101.33.47.68:8081 oth.eve.mdt.qq.com tcp
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
SG 101.33.47.68:8081 oth.eve.mdt.qq.com tcp
SG 101.33.47.68:8081 oth.eve.mdt.qq.com tcp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 68.47.33.101.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
CN 157.255.4.39:443 master.etl.desktop.qq.com tcp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
CN 113.105.95.120:443 tcp
CN 125.39.120.82:443 tcp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp

Files

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

MD5 dccc58e47d693a626fe384b86f3ee094
SHA1 2debd41ee7cce88f1ba19768185328a1eed6e841
SHA256 cf42d5b750058d2fe19016db401ee26f6f2ec51a618f68ed231de88cc23cb50e
SHA512 f00d631c3c8c0d2b54a25aa05dc3b863278859c0a1b96293fd1702c6ac0e5aeb4c5daed4ca7378fc9ca5c8f5918b02a3ba19707fe991bf76766575f109fc6d4f