221e8ed761bb45fb42c5a53b0fb1a2dd44c08766a48d5b0435507d5d198f0cac

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
20-04-2024 08:15

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General

Target

BYDS.exe
Size

228KB
MD5

4fc5fb20abd408edf5d67269742d4bc6
SHA1

9790e25f0411ee48fb47115f3480171a473894a7
SHA256

2e3d9852004b31b7f859314dc85e516a10882f7dbcc29d9adfcdc211f69b7a2f
SHA512

2416487f4488cade3aaa96a58842535764960bf36280527ecc872a7c1b966de66c03b8deb2397d78ceac2b8e7f4ed150f59394f42560e0285b959d02e49f5462
SSDEEP

3072:uepfnUGWR95FYrXm9Fk3eRqkQNrYO7mDnuWr9Sds:sT5QuOYOQnuWr9Sd

Score

6^/10

bootkit persistence

Malware Config

Signatures

Enumerates connected drives 3 TTPs 23 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:

BYDS.exe

description	ioc	process
File opened (read-only)	\??\K:	BYDS.exe
File opened (read-only)	\??\N:	BYDS.exe
File opened (read-only)	\??\R:	BYDS.exe
File opened (read-only)	\??\S:	BYDS.exe
File opened (read-only)	\??\X:	BYDS.exe
File opened (read-only)	\??\Q:	BYDS.exe
File opened (read-only)	\??\A:	BYDS.exe
File opened (read-only)	\??\H:	BYDS.exe
File opened (read-only)	\??\J:	BYDS.exe
File opened (read-only)	\??\L:	BYDS.exe
File opened (read-only)	\??\M:	BYDS.exe
File opened (read-only)	\??\O:	BYDS.exe
File opened (read-only)	\??\B:	BYDS.exe
File opened (read-only)	\??\E:	BYDS.exe
File opened (read-only)	\??\P:	BYDS.exe
File opened (read-only)	\??\T:	BYDS.exe
File opened (read-only)	\??\U:	BYDS.exe
File opened (read-only)	\??\G:	BYDS.exe
File opened (read-only)	\??\I:	BYDS.exe
File opened (read-only)	\??\V:	BYDS.exe
File opened (read-only)	\??\W:	BYDS.exe
File opened (read-only)	\??\Y:	BYDS.exe
File opened (read-only)	\??\Z:	BYDS.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:

BYDS.exe

description ioc process

File opened for modification \??\PhysicalDrive0 BYDS.exe
Drops file in System32 directory 2 IoCs

Processes:

BYDS.exe

description ioc process

File created C:\Windows\SysWOW64\osln.dll BYDS.exe
File created C:\Windows\SysWOW64\ospk.dll BYDS.exe

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

description	ioc	process
File created	C:\Windows\SysWOW64\osln.dll	BYDS.exe
File created	C:\Windows\SysWOW64\ospk.dll	BYDS.exe

Modifies registry class 64 IoCs

Processes:

BYDS.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B28FA150-0FF0-11CF-A911-00AA0062BB4C}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{D4E0F020-720A-11CF-8136-00AA00C14959}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C1-4442-11D1-8906-00A0C9110049}\TypeLib	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\MiscStatus	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C0E-0000-0000-0000-000000000046}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C3-4442-11D1-8906-00A0C9110049}\TypeLib	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\MiscStatus\1	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\Implemented Categories\{0DE86A52-2BAA-11CF-A229-00AA003D7352}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSDBGrid.DBGrid\CLSID\ = "{00028C00-0000-0000-0000-000000000046}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{41A7D760-6018-11CF-9016-00AA0068841E}\ = "DataObject"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\Implemented Categories\{40FC6ED4-2438-11CF-A3DB-080036F12502}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C08-0000-0000-0000-000000000046}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{A4C466B8-499F-101B-BB78-00AA00383CBB}\ = "_ErrObject"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{A4C466B8-499F-101B-BB78-00AA00383CBB}\ProxyStubClsid32	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{14E469E0-BF61-11CF-8385-8F69D8F1350B}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C08-0000-0000-0000-000000000046}\InprocServer32\ = "C:\\USERS\\ADMIN\\APPDATA\\LOCAL\\TEMP\\DBGRID32.OCX"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{41A7D761-6018-11CF-9016-00AA0068841E}\TypeLib\Version = "6.0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C4-4442-11D1-8906-00A0C9110049}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{4495AD01-C993-11D1-A3E4-00A0C90AEA82}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{41A7D761-6018-11CF-9016-00AA0068841E}\TypeLib	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}\ProxyStubClsid32	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D5DE8D20-5BB8-11D1-A1E3-00A0C90F2731}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{41A7D761-6018-11CF-9016-00AA0068841E}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{60CC5D62-2D08-11D0-BDBE-00AA00575603}\1.0\0	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{45046D60-08CA-11CF-A90F-00AA0062BB4C}\TypeLib\Version = "6.0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{888A5A60-B283-11CF-8AD5-00A0C90AEA82}\TypeLib\Version = "6.0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{83C49FF0-B294-11D0-9488-00A0C91110ED}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C5-4442-11D1-8906-00A0C9110049}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{8284B8A2-A8A8-11D1-A3D2-00A0C90AEA82}\TypeLib\Version = "6.0"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{41A7D760-6018-11CF-9016-00AA0068841E}\ProxyStubClsid32	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{C4D651F1-7697-11D1-A1E9-00A0C90F2731}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C4-4442-11D1-8906-00A0C9110049}\ProxyStubClsid32	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}\TypeLib\ = "{60CC5D62-2D08-11D0-BDBE-00AA00575603}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{BE8F9800-2AAA-11CF-AD67-00AA00614F3E}\TypeLib\Version = "6.0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C04-0000-0000-0000-000000000046}\InprocServer32\ = "C:\\USERS\\ADMIN\\APPDATA\\LOCAL\\TEMP\\DBGRID32.OCX"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{4495AD01-C993-11D1-A3E4-00A0C90AEA82}\ = "_PropertyBag"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{C4D651F2-7697-11D1-A1E9-00A0C90F2731}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C00-0000-0000-0000-000000000046}\MiscStatus\ = "0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{A4C46780-499F-101B-BB78-00AA00383CBB}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{45046D60-08CA-11CF-A90F-00AA0062BB4C}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{14E469E0-BF61-11CF-8385-8F69D8F1350B}\ = "AsyncProperty_VB5"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{FCFB3D2B-A0FA-1068-A738-08002B3371B5}\ProxyStubClsid32	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E43FD401-8715-11D1-98E7-00A0C9702442}\TypeLib\Version = "6.0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{60CC5D61-2D08-11D0-BDBE-00AA00575603}\TypeLib\Version = "1.0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{00028C01-0000-0000-0000-000000000046}\1.0\ = "Microsoft Data Bound Grid Control 5.0 (SP3)"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B28FA150-0FF0-11CF-A911-00AA0062BB4C}\ProxyStubClsid32	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{C4D651F0-7697-11D1-A1E9-00A0C90F2731}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E43FD401-8715-11D1-98E7-00A0C9702442}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}\TypeLib\Version = "1.0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\ProgID\ = "SysTrayCtl.cSysTray"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{BE8F9800-2AAA-11CF-AD67-00AA00614F3E}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{888A5A60-B283-11CF-8AD5-00A0C90AEA82}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C4-4442-11D1-8906-00A0C9110049}\TypeLib	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{737361EC-467F-11D1-810F-0000F87557AA}\ProxyStubClsid32	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{C4D651F1-7697-11D1-A1E9-00A0C90F2731}\ = "EventParameters"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{60CC5D61-2D08-11D0-BDBE-00AA00575603}\ProxyStubClsid\ = "{00020420-0000-0000-C000-000000000046}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{00028C01-0000-0000-0000-000000000046}\1.0\HELPDIR	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{14E469E0-BF61-11CF-8385-8F69D8F1350B}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{CBB76011-C508-11D1-A3E3-00A0C90AEA82}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{FCFB3D2B-A0FA-1068-A738-08002B3371B5}\ProxyStubClsid32\ = "{00020420-0000-0000-C000-000000000046}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C1-4442-11D1-8906-00A0C9110049}\ProxyStubClsid32\ = "{00020420-0000-0000-C000-000000000046}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C4-4442-11D1-8906-00A0C9110049}\ProxyStubClsid32\ = "{00020420-0000-0000-C000-000000000046}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{A4C46780-499F-101B-BB78-00AA00383CBB}\TypeLib	BYDS.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

Processes:

BYDS.exe

description	pid	process
Token: SeShutdownPrivilege	3656	BYDS.exe
Token: SeCreatePagefilePrivilege	3656	BYDS.exe
Token: SeSystemtimePrivilege	3656	BYDS.exe
Token: SeSystemtimePrivilege	3656	BYDS.exe
Token: SeSystemtimePrivilege	3656	BYDS.exe
Token: SeSystemtimePrivilege	3656	BYDS.exe
Token: SeSystemtimePrivilege	3656	BYDS.exe
Token: SeSystemtimePrivilege	3656	BYDS.exe
Token: SeSystemtimePrivilege	3656	BYDS.exe
Token: SeSystemtimePrivilege	3656	BYDS.exe

Suspicious use of FindShellTrayWindow 5 IoCs

Processes:

BYDS.exe

pid process

3656 BYDS.exe
3656 BYDS.exe
3656 BYDS.exe
3656 BYDS.exe
3656 BYDS.exe
Suspicious use of SendNotifyMessage 5 IoCs

Processes:

BYDS.exe

pid process

3656 BYDS.exe
3656 BYDS.exe
3656 BYDS.exe
3656 BYDS.exe
3656 BYDS.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

BYDS.exe

pid process

3656 BYDS.exe
3656 BYDS.exe

pid	process
3656	BYDS.exe
3656	BYDS.exe
3656	BYDS.exe
3656	BYDS.exe
3656	BYDS.exe

pid	process
3656	BYDS.exe
3656	BYDS.exe
3656	BYDS.exe
3656	BYDS.exe
3656	BYDS.exe

pid	process
3656	BYDS.exe
3656	BYDS.exe

C:\Users\Admin\AppData\Local\Temp\BYDS.exe
"C:\Users\Admin\AppData\Local\Temp\BYDS.exe"
1⤵
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
PID:3656

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\Microsoft\Windows Media\12.0\WMSDKNS.XML
Filesize
9KB

MD5
7050d5ae8acfbe560fa11073fef8185d

SHA1
5bc38e77ff06785fe0aec5a345c4ccd15752560e

SHA256
cb87767c4a384c24e4a0f88455f59101b1ae7b4fb8de8a5adb4136c5f7ee545b

SHA512
a7a295ac8921bb3dde58d4bcde9372ed59def61d4b7699057274960fa8c1d1a1daff834a93f7a0698e9e5c16db43af05e9fd2d6d7c9232f7d26ffcff5fc5900b

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