221e8ed761bb45fb42c5a53b0fb1a2dd44c08766a48d5b0435507d5d198f0cac

Analysis

max time kernel
121s
max time network
128s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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)	\??\S:	BYDS.exe
File opened (read-only)	\??\T:	BYDS.exe
File opened (read-only)	\??\U:	BYDS.exe
File opened (read-only)	\??\A:	BYDS.exe
File opened (read-only)	\??\E:	BYDS.exe
File opened (read-only)	\??\H:	BYDS.exe
File opened (read-only)	\??\I:	BYDS.exe
File opened (read-only)	\??\K:	BYDS.exe
File opened (read-only)	\??\V:	BYDS.exe
File opened (read-only)	\??\W:	BYDS.exe
File opened (read-only)	\??\Z:	BYDS.exe
File opened (read-only)	\??\O:	BYDS.exe
File opened (read-only)	\??\P:	BYDS.exe
File opened (read-only)	\??\Y:	BYDS.exe
File opened (read-only)	\??\B:	BYDS.exe
File opened (read-only)	\??\G:	BYDS.exe
File opened (read-only)	\??\J:	BYDS.exe
File opened (read-only)	\??\L:	BYDS.exe
File opened (read-only)	\??\N:	BYDS.exe
File opened (read-only)	\??\M:	BYDS.exe
File opened (read-only)	\??\Q:	BYDS.exe
File opened (read-only)	\??\R:	BYDS.exe
File opened (read-only)	\??\X:	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\ospk.dll BYDS.exe
File created C:\Windows\SysWOW64\osln.dll BYDS.exe

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

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

Modifies registry class 64 IoCs

Processes:

BYDS.exe

description	ioc	process
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\{14E469E0-BF61-11CF-8385-8F69D8F1350B}\TypeLib\Version = "6.0"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C3-4442-11D1-8906-00A0C9110049}\ProxyStubClsid32	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}\TypeLib	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{60CC5D61-2D08-11D0-BDBE-00AA00575603}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{41A7D761-6018-11CF-9016-00AA0068841E}\TypeLib	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{D4E0F020-720A-11CF-8136-00AA00C14959}\TypeLib	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{CBB76011-C508-11D1-A3E3-00A0C90AEA82}\ = "AsyncProperty"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{00028C00-0000-0000-0000-000000000046}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{00028C00-0000-0000-0000-000000000046}\MiscStatus\1\ = "164241"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}\ProxyStubClsid32	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{45046D60-08CA-11CF-A90F-00AA0062BB4C}\ = "PropertyBag_VB5"	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\{60CC5D61-2D08-11D0-BDBE-00AA00575603}\ProxyStubClsid32\ = "{00020420-0000-0000-C000-000000000046}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\SysTrayCtl.cSysTray\ = "SysTrayCtl.cSysTray"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{00028C0D-0000-0000-0000-000000000046}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{00028C08-0000-0000-0000-000000000046}\InprocServer32	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{A4C466B8-499F-101B-BB78-00AA00383CBB}	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\{14E469E0-BF61-11CF-8385-8F69D8F1350B}\ProxyStubClsid32	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C4-4442-11D1-8906-00A0C9110049}\TypeLib\Version = "6.0"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TYPELIB\{60CC5D62-2D08-11D0-BDBE-00AA00575603}\1.0\0	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\TYPELIB\{00028C01-0000-0000-0000-000000000046}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{41A7D761-6018-11CF-9016-00AA0068841E}\ProxyStubClsid32	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2CE46480-1A08-11CF-AD63-00AA00614F3E}\ = "SelectedControls"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\ProgID	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\VERSION\ = "1.0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\SysTrayCtl.cSysTray\Clsid\ = "{60CC5D60-2D08-11D0-BDBE-00AA00575603}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{00028C00-0000-0000-0000-000000000046}\Implemented Categories\{0DE86A52-2BAA-11CF-A229-00AA003D7352}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{4495AD01-C993-11D1-A3E4-00A0C90AEA82}\ = "_PropertyBag"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{888A5A60-B283-11CF-8AD5-00A0C90AEA82}\ProxyStubClsid32	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C2-4442-11D1-8906-00A0C9110049}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C3-4442-11D1-8906-00A0C9110049}\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\{BE8F9800-2AAA-11CF-AD67-00AA00614F3E}\TypeLib	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}\ProxyStubClsid	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{60CC5D61-2D08-11D0-BDBE-00AA00575603}\ = "cSysTray"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\MSDBGrid.DBGrid\ = "DBGrid Control"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{00028C00-0000-0000-0000-000000000046}\TypeLib\ = "{00028C01-0000-0000-0000-000000000046}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B28FA150-0FF0-11CF-A911-00AA0062BB4C}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7500A6BA-EB65-11D1-938D-0000F87557C9}\TypeLib\Version = "6.0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{CBB76011-C508-11D1-A3E3-00A0C90AEA82}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{83C49FF0-B294-11D0-9488-00A0C91110ED}\TypeLib	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C4-4442-11D1-8906-00A0C9110049}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\Control	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{00028C04-0000-0000-0000-000000000046}\ = "DBGrid Property Page 3"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{A4C466B8-499F-101B-BB78-00AA00383CBB}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2CE46480-1A08-11CF-AD63-00AA00614F3E}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{83C49FF0-B294-11D0-9488-00A0C91110ED}\ProxyStubClsid32	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E43FD401-8715-11D1-98E7-00A0C9702442}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}\ProxyStubClsid32	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{60CC5D61-2D08-11D0-BDBE-00AA00575603}\ = "__cSysTray"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{00028C01-0000-0000-0000-000000000046}\1.0	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{A4C46780-499F-101B-BB78-00AA00383CBB}\ = "_Collection"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{C0324960-2AAA-11CF-AD67-00AA00614F3E}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C1-4442-11D1-8906-00A0C9110049}\ProxyStubClsid32	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{8284B8A2-A8A8-11D1-A3D2-00A0C90AEA82}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TYPELIB\{60CC5D62-2D08-11D0-BDBE-00AA00575603}\1.0\FLAGS\ = "2"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{00028C00-0000-0000-0000-000000000046}\Implemented Categories\{40FC6ED4-2438-11CF-A3DB-080036F12502}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{00028C00-0000-0000-0000-000000000046}\Implemented Categories\{0DE86A53-2BAA-11CF-A229-00AA003D7352}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{A4C466B8-499F-101B-BB78-00AA00383CBB}\ = "_ErrObject"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{C4D651F0-7697-11D1-A1E9-00A0C90F2731}\TypeLib\Version = "6.0"	BYDS.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

BYDS.exe

description	pid	process
Token: SeSystemtimePrivilege	1808	BYDS.exe
Token: SeSystemtimePrivilege	1808	BYDS.exe
Token: SeSystemtimePrivilege	1808	BYDS.exe
Token: SeSystemtimePrivilege	1808	BYDS.exe
Token: SeSystemtimePrivilege	1808	BYDS.exe
Token: SeSystemtimePrivilege	1808	BYDS.exe
Token: SeSystemtimePrivilege	1808	BYDS.exe
Token: SeSystemtimePrivilege	1808	BYDS.exe

Suspicious use of FindShellTrayWindow 5 IoCs

Processes:

BYDS.exe

pid process

1808 BYDS.exe
1808 BYDS.exe
1808 BYDS.exe
1808 BYDS.exe
1808 BYDS.exe
Suspicious use of SendNotifyMessage 5 IoCs

Processes:

BYDS.exe

pid process

1808 BYDS.exe
1808 BYDS.exe
1808 BYDS.exe
1808 BYDS.exe
1808 BYDS.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

BYDS.exe

pid process

1808 BYDS.exe
1808 BYDS.exe

pid	process
1808	BYDS.exe
1808	BYDS.exe
1808	BYDS.exe
1808	BYDS.exe
1808	BYDS.exe

pid	process
1808	BYDS.exe
1808	BYDS.exe
1808	BYDS.exe
1808	BYDS.exe
1808	BYDS.exe

pid	process
1808	BYDS.exe
1808	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:1808