2f6e75e0384b85cbaffbb9947cea5c1b2e4acf4952c3ab6fae919c8a965e1d43

General

Target

brawl-stars-gameloop-2-0-11646-123.exe
Size

9.4MB
MD5

f5e7ba37555932ecea7fbd874108d47e
SHA1

009c388a6e381f502dee72c587f553a03838436c
SHA256

2f6e75e0384b85cbaffbb9947cea5c1b2e4acf4952c3ab6fae919c8a965e1d43
SHA512

7ac31e4e877d4e7058cb7927e63d02e07272ba81c06b23c70734ed91bde435ee77effba5e8ced2dfb2480e4115a3ab735438bdb5e330e6f2c7dddde76cf30ede
SSDEEP

196608:hkb78tqlUgN7AktVweDO8emQmG5eWWi/zio/ia:q+2O84wWrX/

Score

7^/10

bootkit discovery persistence

Malware Config

Signatures

Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

2096 icacls.exe

pid	process
2096	icacls.exe

Enumerates connected drives 3 TTPs 22 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

brawl-stars-gameloop-2-0-11646-123.exe

description	ioc	process
File opened (read-only)	\??\P:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\N:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\O:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\M:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\V:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\Y:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\E:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\L:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\H:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\Q:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\R:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\S:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\W:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\X:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\F:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\G:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\K:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\T:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\U:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\Z:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\I:	brawl-stars-gameloop-2-0-11646-123.exe
File opened (read-only)	\??\J:	brawl-stars-gameloop-2-0-11646-123.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
bootkit persistence

Bootkit
T1542.003

Processes:

brawl-stars-gameloop-2-0-11646-123.exe

description ioc process

File opened for modification \??\PhysicalDrive0 brawl-stars-gameloop-2-0-11646-123.exe
Executes dropped EXE 1 IoCs

Processes:

TenioDL.exe

pid process

5976 TenioDL.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	brawl-stars-gameloop-2-0-11646-123.exe

pid	process
5976	TenioDL.exe

Loads dropped DLL 6 IoCs

Processes:

brawl-stars-gameloop-2-0-11646-123.exeTenioDL.exe

pid	process
4332	brawl-stars-gameloop-2-0-11646-123.exe
4332	brawl-stars-gameloop-2-0-11646-123.exe
4332	brawl-stars-gameloop-2-0-11646-123.exe
5976	TenioDL.exe
5976	TenioDL.exe
5976	TenioDL.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

brawl-stars-gameloop-2-0-11646-123.exeTenioDL.exeicacls.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	brawl-stars-gameloop-2-0-11646-123.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TenioDL.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe

Modifies registry class 3 IoCs

Processes:

TenioDL.exe

description	ioc	process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\metnsd\clsid\SequenceID = 1c4e59aea0af1148ab46c55dd9975fef	TenioDL.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\metnsd\clsid	TenioDL.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\metnsd	TenioDL.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

brawl-stars-gameloop-2-0-11646-123.exe

pid process

4332 brawl-stars-gameloop-2-0-11646-123.exe
4332 brawl-stars-gameloop-2-0-11646-123.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

brawl-stars-gameloop-2-0-11646-123.exe

pid process

4332 brawl-stars-gameloop-2-0-11646-123.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

TenioDL.exe

description pid process

Token: SeManageVolumePrivilege 5976 TenioDL.exe

description	pid	process
Token: SeManageVolumePrivilege	5976	TenioDL.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

brawl-stars-gameloop-2-0-11646-123.exeTenioDL.exe

description	pid	process	target process
PID 4332 wrote to memory of 5976	4332	brawl-stars-gameloop-2-0-11646-123.exe	TenioDL.exe
PID 4332 wrote to memory of 5976	4332	brawl-stars-gameloop-2-0-11646-123.exe	TenioDL.exe
PID 4332 wrote to memory of 5976	4332	brawl-stars-gameloop-2-0-11646-123.exe	TenioDL.exe
PID 5976 wrote to memory of 2096	5976	TenioDL.exe	icacls.exe
PID 5976 wrote to memory of 2096	5976	TenioDL.exe	icacls.exe
PID 5976 wrote to memory of 2096	5976	TenioDL.exe	icacls.exe

C:\Users\Admin\AppData\Local\Temp\brawl-stars-gameloop-2-0-11646-123.exe
"C:\Users\Admin\AppData\Local\Temp\brawl-stars-gameloop-2-0-11646-123.exe"
1⤵
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:4332

C:\Users\Admin\AppData\Roaming\Tencent\TxGameAssistant\GameDownload\TenioDL.exe
C:\Users\Admin\AppData\Roaming\Tencent\TxGameAssistant\GameDownload\TenioDL.exe
2⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5976

C:\Windows\SysWOW64\icacls.exe
"C:\Windows\System32\icacls.exe" C:\Users\Admin\AppData\Roaming\Tencent\Config\ /t /setintegritylevel low
3⤵
- Modifies file permissions
- System Location Discovery: System Language Discovery
PID:2096

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

1

T1222

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Tencent\TxGameAssistant\GameDownload\TenioDL.dll

Filesize
523KB

MD5
34431eb1ae2d3ac86e3415d8c3e977a3

SHA1
b2eae82dffecdbe02ef877d5a4d28de83b84bd59

SHA256
8379e09c7a3a51bdb652418781ceed8067e324b656c7d5a307b9a77c899f0806

SHA512
32b1d12630ced494b5168037a1d0899b3576970f603b5e69bf48fd915a4dad51d877e97bc91660929719e3a1395344ec39d5cc5b761111096c4523563d3bdd5e

Download Submit
C:\Users\Admin\AppData\Roaming\Tencent\TxGameAssistant\GameDownload\TenioDL.exe

Filesize
167KB

MD5
8fb4e336f4c145eb6e379701c3ac59d1

SHA1
ad53b732cabd515035784f187aeaab4d8a6b67c7

SHA256
d7a59b5ba3f0fb3906ebaa7a67c76088995a1f37652a2ae9893977c19754d9bf

SHA512
c83b726e867f47c9fdabaf3151ae74c07e2b74be47f8ec41685fee744eba41c81614faaf473fcd28cabc044545eddcad5cbbaf67e90109d916e109c1b5d6a770

Download Submit
C:\Users\Admin\AppData\Roaming\Tencent\TxGameAssistant\GameDownload\TenioDL_core.dll

Filesize
543KB

MD5
11d65a68132e918bd80e7e0a09029730

SHA1
c1978c02176e1e370c66d1597e964eab908847dc

SHA256
36c18dedac0429375c583fcf9420cdc9ace8a38bbac9f33378b5b4d6739da511

SHA512
34278a85cfdad1b2086b9368368b6eada08829c3237d02d0afbfced4f32df38e95a5ca0a600fc8d8c98c33d6cc8d4ac82c3279ccdba36cb0ed4738c1c0648315

Download Submit
C:\Users\Admin\AppData\Roaming\Tencent\TxGameAssistant\GameDownload\dr.dll

Filesize
74KB

MD5
2814acbd607ba47bdbcdf6ac3076ee95

SHA1
50ab892071bed2bb2365ca1d4bf5594e71c6b13b

SHA256
5904a7e4d97eeac939662c3638a0e145f64ff3dd0198f895c4bf0337595c6a67

SHA512
34c73014ffc8d38d6dd29f4f84c8f4f9ea971bc131f665f65b277f453504d5efc2d483a792cdea610c5e0544bf3997b132dcdbe37224912c5234c15cdb89d498

Download Submit
C:\Users\Admin\AppData\Roaming\Tencent\TxGameAssistant\GameDownload\p2papp.dll

Filesize
2.9MB

MD5
b1b101d86c417286e60f471fc8b79bb1

SHA1
b602bee2a25ed63a1f9cda72c83bdadd44dcd07c

SHA256
91cfa1769be449dfdfbf6bcc8049ce5c9218df6deaa66a0879528526b204a51a

SHA512
0a1d03364e1a52c08d6992a52b31b29f54c3781c009562427c560338db5428b74b55fab41f9c48c7018ddce41ab6a7f8593fbf12a75ae472c11590a36b42682b

Download Submit
memory/4332-19-0x0000000003880000-0x0000000003891000-memory.dmp

Filesize
68KB

Download
memory/5976-31-0x0000000002770000-0x0000000002A5F000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads