CLIPBRDWNDCLASS Process Manipulating

CLIPBRDWNDCLASS is a window class that is registered by the Object Linking & Embedding (OLE) library (ole32.dll) to handle clipboard data. When a window of this class is created, it is assigned a number of window properties that store the addresses of various interfaces that are used to process clipboard data. These interfaces include the ClipboardDataObjectInterface, ClipboardRootDataObjectInterface, and …

DNS API Injection Process Manipulating

DNS API injection is a technique used by malware to evade detection by intercepting and modifying DNS (Domain Name System) requests made by a host system. The technique involves injecting code into the DNS API (Application Programming Interface) of the host system, which is a set of functions and protocols that allow communication with the DNS service. By injecting code …

Breaking BaDDEr Process Manipulating

Dynamic Data Exchange (DDE) is a protocol that allows applications to share data with each other. The Dynamic Data Exchange Management Library (DDEML) is a set of functions that facilitate data sharing using the DDE protocol. DDE and DDEML are commonly used in Microsoft Office to enable data to be shared between applications. In October 2017, a vulnerability was discovered …

Indicator Removal: Timestomp Anti-Forensic Defense Evasion [Mitre]

Timestomping is a technique used by adversaries to modify the timestamps of a file, such as the modify, access, create, and change times. This technique is often used to hide the fact that a file has been modified or created by the adversary, making it more difficult for forensic investigators or file analysis tools to detect the changes.

By …

Execution Guardrails: Environmental Keying Defense Evasion [Mitre]

Adversaries may environmentally key payloads or other features of malware to evade defenses and constraint execution to a specific target environment. Environmental keying uses cryptography to constrain execution or actions based on adversary supplied environment specific conditions that are expected to be present on the target. Environmental keying is an implementation of Execution Guardrails that utilizes cryptographic techniques for deriving …

File Melt Others

File melting is a technique that malware uses to delete itself after it has been installed on a system. This is often done in order to avoid detection by antivirus programs or other security measures. The process of file melting involves overwriting the file with random data, making it impossible to recover the original file or to detect the presence …

Detecting Online Sandbox Sandbox Evasion

Online sandbox has become very popular for malware analysis. Several malware authors employ such techniques to avoid detection and analysis. Some of these techniques will be summarized here.

Any.Run uses a fake root certificate to spy on sandbox traffic. The first information about the system can be obtained by querying the information of the root certificate. In …

Killing Windows Event Log Anti-Forensic

Killing the Windows Event Log is a technique used by malware to prevent security professionals from detecting and analyzing it. Svchost.exe is a process that manages services on Windows operating systems.

By grouping multiple services into a single process, Svchost.exe conserves computing resources and reduces resource consumption. However, this also means that Svchost.exe manages the Event Log service, which …

Access Token Manipulation: Parent PID Spoofing Process Manipulating Defense Evasion [Mitre]

Adversaries may spoof the parent process identifier (PPID) of a new process to evade process-monitoring defenses or to elevate privileges. New processes are typically spawned directly from their parent, or calling, process unless explicitly specified.

One way of explicitly assigning the PPID of a new process is via the CreateProcess API call, which supports a parameter that defines the …

Volume Shadow Copy Service (VSC,VSS) Deletion Anti-Forensic Defense Evasion [Mitre]

Deleting Volume Shadow Copy makes the forensic investigation more difficult in terms of the recovery of previous artifact evidence. In addition, attackers using ransomware often delete VSCs not to be able to recover the original files of the encrypted files from VSCs.

On the other hand, deleting by using vssadmin and WMIC is on a file system level, the …

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