221e8ed761bb45fb42c5a53b0fb1a2dd44c08766a48d5b0435507d5d198f0cac

Analysis

max time kernel
93s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
28/09/2024, 12:41

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General

Target
BYDS.exe
Size 228KB
Sample240928-pwtndayfpc
SHA256 2e3d9852004b31b7f859314dc85e516a10882f7dbcc29d9adfcdc211f69b7a2f
MD5 4fc5fb20abd408edf5d67269742d4bc6
SHA1 9790e25f0411ee48fb47115f3480171a473894a7
SHA512 2416487f4488cade3aaa96a58842535764960bf36280527ecc872a7c1b966de66c03b8deb2397d78ceac2b8e7f4ed150f59394f42560e0285b959d02e49f5462
SSDEEP 3072:uepfnUGWR95FYrXm9Fk3eRqkQNrYO7mDnuWr9Sds:sT5QuOYOQnuWr9Sd
MD5 SHA1 SHA512 SSDEEP

Score

6^/10

bootkit discovery 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

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

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

Drops file in System32 directory 2 IoCs

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

System Location Discovery: System Language Discovery 1 TTPs 1 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BYDS.exe

Modifies registry class 64 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{C0324960-2AAA-11CF-AD67-00AA00614F3E}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{C0324960-2AAA-11CF-AD67-00AA00614F3E}\TypeLib	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{D4E0F020-720A-11CF-8136-00AA00C14959}\ = "DataBindings"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{C4D651F0-7697-11D1-A1E9-00A0C90F2731}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C1-4442-11D1-8906-00A0C9110049}\ProxyStubClsid32\ = "{00020420-0000-0000-C000-000000000046}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C4-4442-11D1-8906-00A0C9110049}\ProxyStubClsid32	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}	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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C00-0000-0000-0000-000000000046}\ToolboxBitmap32\ = "C:\\USERS\\ADMIN\\APPDATA\\LOCAL\\TEMP\\DBGRID32.OCX, 1"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C2-4442-11D1-8906-00A0C9110049}\TypeLib	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{737361EC-467F-11D1-810F-0000F87557AA}\TypeLib	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{60CC5D62-2D08-11D0-BDBE-00AA00575603}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C00-0000-0000-0000-000000000046}\Implemented Categories\{7DD95802-9882-11CF-9FA9-00AA006C42C4}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C08-0000-0000-0000-000000000046}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B28FA150-0FF0-11CF-A911-00AA0062BB4C}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{BE8F9800-2AAA-11CF-AD67-00AA00614F3E}\TypeLib	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{7500A6BA-EB65-11D1-938D-0000F87557C9}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{FCFB3D2B-A0FA-1068-A738-08002B3371B5}\ProxyStubClsid32\ = "{00020420-0000-0000-C000-000000000046}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\ProgID	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\InprocServer32	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C0D-0000-0000-0000-000000000046}\ = "DBGrid Property Page 2"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}\ = "_cSysTray"	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\WOW6432Node\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}\ = "cSysTray"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C00-0000-0000-0000-000000000046}\Implemented Categories\{0DE86A53-2BAA-11CF-A229-00AA003D7352}	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{8284B8A2-A8A8-11D1-A3D2-00A0C90AEA82}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{E43FD401-8715-11D1-98E7-00A0C9702442}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}\TypeLib\ = "{60CC5D62-2D08-11D0-BDBE-00AA00575603}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{41A7D760-6018-11CF-9016-00AA0068841E}\ProxyStubClsid32	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B28FA150-0FF0-11CF-A911-00AA0062BB4C}\ProxyStubClsid32	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{D4E0F020-720A-11CF-8136-00AA00C14959}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{83C49FF0-B294-11D0-9488-00A0C91110ED}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\VERSION\ = "1.0"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C00-0000-0000-0000-000000000046}\Implemented Categories\{0DE86A52-2BAA-11CF-A229-00AA003D7352}	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}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C1-4442-11D1-8906-00A0C9110049}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C2-4442-11D1-8906-00A0C9110049}\ProxyStubClsid32	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\Interface\{BE8F9800-2AAA-11CF-AD67-00AA00614F3E}\TypeLib\Version = "6.0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{C4D651F2-7697-11D1-A1E9-00A0C90F2731}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C1-4442-11D1-8906-00A0C9110049}	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C03-0000-0000-0000-000000000046}\ = "DBGrid Property Page 1"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{A4C46780-499F-101B-BB78-00AA00383CBB}\TypeLib\Version = "6.0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{45046D60-08CA-11CF-A90F-00AA0062BB4C}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{C4D651F1-7697-11D1-A1E9-00A0C90F2731}\TypeLib\Version = "6.0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C1-4442-11D1-8906-00A0C9110049}\ = "_DDataBoundClass"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\MiscStatus\ = "0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{60CC5D5F-2D08-11D0-BDBE-00AA00575603}\ProxyStubClsid\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{00028C01-0000-0000-0000-000000000046}\1.0\FLAGS\ = "2"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C0E-0000-0000-0000-000000000046}\ = "DBGrid Property Page 4"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{A4C466B8-499F-101B-BB78-00AA00383CBB}\TypeLib\Version = "6.0"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2CE46480-1A08-11CF-AD63-00AA00614F3E}\TypeLib\ = "{EA544A21-C82D-11D1-A3E4-00A0C90AEA82}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\ToolboxBitmap32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\SysTray.ocx, 30000"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{00028C00-0000-0000-0000-000000000046}\TypeLib	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{D5DE8D20-5BB8-11D1-A1E3-00A0C90F2731}\ = "VBPropertyBag"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{C0324960-2AAA-11CF-AD67-00AA00614F3E}\ProxyStubClsid32	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{60CC5D60-2D08-11D0-BDBE-00AA00575603}\Implemented Categories\{0DE86A53-2BAA-11CF-A229-00AA003D7352}	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
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{41A7D760-6018-11CF-9016-00AA0068841E}\TypeLib	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{888A5A60-B283-11CF-8AD5-00A0C90AEA82}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	BYDS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{FCFB3D2B-A0FA-1068-A738-08002B3371B5}\ = "_DClass"	BYDS.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{EB41E8C4-4442-11D1-8906-00A0C9110049}\TypeLib	BYDS.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeShutdownPrivilege	1812	BYDS.exe
Token: SeCreatePagefilePrivilege	1812	BYDS.exe
Token: SeSystemtimePrivilege	1812	BYDS.exe
Token: SeSystemtimePrivilege	1812	BYDS.exe
Token: SeSystemtimePrivilege	1812	BYDS.exe
Token: SeSystemtimePrivilege	1812	BYDS.exe
Token: SeSystemtimePrivilege	1812	BYDS.exe
Token: SeSystemtimePrivilege	1812	BYDS.exe
Token: SeSystemtimePrivilege	1812	BYDS.exe
Token: SeSystemtimePrivilege	1812	BYDS.exe

Suspicious use of FindShellTrayWindow 5 IoCs

pid	Process
1812	BYDS.exe
1812	BYDS.exe
1812	BYDS.exe
1812	BYDS.exe
1812	BYDS.exe

Suspicious use of SendNotifyMessage 5 IoCs

pid	Process
1812	BYDS.exe
1812	BYDS.exe
1812	BYDS.exe
1812	BYDS.exe
1812	BYDS.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1812	BYDS.exe
1812	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
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
PID:1812

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

WMSDKNS.XML

Path C:\Users\Admin\AppData\Local\Microsoft\Windows Media\12.0\WMSDKNS.XML
Size 9KB
SHA256 cb87767c4a384c24e4a0f88455f59101b1ae7b4fb8de8a5adb4136c5f7ee545b
MD5 7050d5ae8acfbe560fa11073fef8185d
SHA1 5bc38e77ff06785fe0aec5a345c4ccd15752560e
SHA512 a7a295ac8921bb3dde58d4bcde9372ed59def61d4b7699057274960fa8c1d1a1daff834a93f7a0698e9e5c16db43af05e9fd2d6d7c9232f7d26ffcff5fc5900b
SSDEEP 96:/YkZRAF6zyHUhm77yB1pZYCEnfHrHH7B6xTGH+YCLV3zwULJEYCJWyHBt3zwFRh+:/2FV0bBPCfUdY
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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