fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf

Analysis

max time kernel
145s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19-04-2024 20:20

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General

Target

fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.exe
Size

6.5MB
MD5

888a9d654d30c7e025f9be07ce6e8234
SHA1

8a1771c7e670eb4fe2bd8552091dbfccc86fd129
SHA256

fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf
SHA512

0483116e7536877b2bf47b10b08e102af6e4b789da7b612a0bb2eb8c564008b7d84676896fb11bf5bc6ee2b6a9b0dcd2e902b404d9152d3eb7d51d7c8234cd25
SSDEEP

98304:J08vdsGaQNgS1C6e8nKpIkboG79rbonZP3Oq4xqYRwirGLqt:J0HwdT8bJR8n0P0WHMqt

Score

7^/10

bootkit persistence

Malware Config

Signatures

Loads dropped DLL 1 IoCs

Processes:

fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.exe

pid process

940 fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.exe
Enumerates connected drives 3 TTPs 1 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:

fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.exe

description ioc process

File opened (read-only) \??\F: fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.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:

fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.exe

description ioc process

File opened for modification \??\PhysicalDrive0 fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.exe

description	ioc	process
File opened (read-only)	\??\F:	fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.exe

pid	process
940	fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.exe
940	fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.exe

C:\Users\Admin\AppData\Local\Temp\fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.exe
"C:\Users\Admin\AppData\Local\Temp\fc21f614e6fed1808bbf3a0510ba093e9861688183818ba09319b2c0802d6cdf.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious behavior: EnumeratesProcesses
PID:940

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=1028 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
1⤵
PID:3996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Tencent\TxGameAssistant\TGBDownloader\dr.dll
Filesize
74KB

MD5
2814acbd607ba47bdbcdf6ac3076ee95

SHA1
50ab892071bed2bb2365ca1d4bf5594e71c6b13b

SHA256
5904a7e4d97eeac939662c3638a0e145f64ff3dd0198f895c4bf0337595c6a67

SHA512
34c73014ffc8d38d6dd29f4f84c8f4f9ea971bc131f665f65b277f453504d5efc2d483a792cdea610c5e0544bf3997b132dcdbe37224912c5234c15cdb89d498

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