PnkBstrK.sys - Clean (16/100) - DriverShield Analysis

Analysis of PnkBstrK.sys: clean verdict, risk score 16/100. 0 YARA matches, 1/75 multi-engine detections. SHA256 f1e02f0f967becb8. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.

PnkBstrK.sys - Analysis Report

DriverShield analyzed the Windows kernel driver PnkBstrK.sys and assigned a verdict of Clean with a composite risk score of 16/100, indicating no notable risk signals (0-29 band).

Verdict	Clean (16/100)
YARA matches	0
Multi-engine detections	1 / 75
File size	22328 bytes
Code-signing signer	VeriSign Time Stamping Services Signer - G2
Analyzed	2026-03-22
SHA256	f1e02f0f967becb82873910eb9e0d8a037c73eecdd55a381df68c05cf878dbb0
SHA1	1f853885bcdc6ac58bca13a1e843d5fe13497036
MD5	8bb94087cef0256f5ead973d7524bf58

How the 16/100 score breaks down

Each component is scored 0-100 and then weighted into the composite. See the analysis methodology for the exact formula.

Component	Sub-score
Multi-engine consensus	0 / 100
YARA signature matches	0 / 100
Dangerous kernel imports	66 / 100
IOCTL dispatch surface	0 / 100
Known-vulnerable corpus	0 / 100
Code-signing state	80 / 100
Packing and entropy	0 / 100
Dynamic behaviour	0 / 100
CVE cross-reference	0 / 100

Kernel imports (8)

Kernel-mode APIs resolved from the Import Address Table of PnkBstrK.sys, ranked by exploitation relevance.

API	Risk	Why it matters
MmGetSystemRoutineAddress	high	Potentially dangerous - could be used for privilege escalation or security bypass
ExAllocatePoolWithTag	low	Standard kernel API - generally benign
RtlInitUnicodeString	low	Standard kernel API - generally benign
IofCompleteRequest	low	Standard kernel API - generally benign
IoCreateSymbolicLink	low	Standard kernel API - generally benign
IoDeleteSymbolicLink	low	Standard kernel API - generally benign
IoDeleteDevice	low	Standard kernel API - generally benign
IoCreateDevice	low	Standard kernel API - generally benign

PE sections

Section layout and Shannon entropy. High entropy in a code section is a packing or encryption indicator.

Section	Virtual size	Raw size	Entropy	Flags
.text	0x34E2	0x3600	5.79	CODE, EXEC, READ
.rdata	0x01D4	0x0200	4.51	IDATA, READ
.data	0x0E00	0x0200	1.03	IDATA, READ, WRITE
.reloc	0x0348	0x0400	5.68	IDATA, READ, DISCARD

Exploit mitigations

Control Flow Guard	Not enabled
ASLR	Not enabled
DEP	Not enabled
Integrity check	Not enforced
Mitigation score	5 / 100

No CFG - Control Flow Guard is not enabled. Indirect call targets are not validated, making the driver susceptible to control flow hijacking via corrupted function pointers or vtables.
No ASLR - ASLR is disabled. The driver loads at a predictable address, enabling reliable exploitation of memory corruption vulnerabilities.
No DEP - DEP is disabled. Data pages are executable, allowing shellcode execution from stack/heap buffers.
Expired Certificate - The driver is signed but the certificate has expired. Windows may still load it depending on revocation policy.

MITRE ATT&CK techniques (6)

Techniques this driver could enable if loaded by an adversary.

ID	Technique	Tactic
T1071	Application Layer Protocol	Command and Control
T1211	Exploitation for Defense Evasion	Defense Evasion
T1543.003	Windows Service	Persistence
T1553.002	Subvert Trust Controls: Code Signing	Defense Evasion
T1569.002	Service Execution	Execution
T1652	Device Driver Discovery	Discovery

Code-signing chain

Signer	VeriSign Time Stamping Services Signer - G2
Signer organisation	VeriSign, Inc.
Issuer	VeriSign Time Stamping Services CA
Serial	3825D7FAF861AF9EF490E726B5D65AD5
Valid from	2007-06-15 00:00 UTC
Valid until	2012-06-14 23:59 UTC (expired)
Signature validity	Not verified

Certificate revision: 0x0200
Certificate type: PKCS#7
Chain: VeriSign Time Stamping Services CA
Chain: VeriSign Class 3 Code Signing 2004 CA
Chain: Even Balance, Inc.

Symbolic execution

Engine angr, status completed, 57 paths explored at a maximum depth of 57. Vulnerability classes reached: 0. Exploitable paths: 1.

Frequently asked questions about PnkBstrK.sys

Is PnkBstrK.sys safe?

Based on DriverShield static and dynamic analysis, PnkBstrK.sys is assessed as clean, with no notable risk signals. Its composite risk score is 16/100 (verdict: clean). Always validate findings independently before acting.

What is the risk score of PnkBstrK.sys?

PnkBstrK.sys has a DriverShield composite risk score of 16/100, placing it in the clean verdict band. SHA256: f1e02f0f967becb82873910eb9e0d8a037c73eecdd55a381df68c05cf878dbb0.

What is PnkBstrK.sys?

PnkBstrK.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators. It is code-signed by VeriSign Time Stamping Services Signer - G2.

Related: Other drivers signed by VeriSign Time Stamping Services Signer - G2 · BYOVD research index · full driver database · CVE library · code signing atlas