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Virtualization/Sandbox Evasion: User Activity Based Checks
![Defense Evasion [Mitre] icon](/media/2024/04/08/icons8-burglar.svg){kind=small}
Adversaries may employ various user activity checks to detect and avoid virtualization and analysis environments. This may include changing behaviors based on the results of checks for the presence of artifacts indicative of a virtual machine environment (VME) or sandbox. If the adversary detects a VME, they may alter their malware to disengage from the victim or conceal the core …
Read moreRight-to-Left Override (RLO) Extension Spoofing
The Right-to-Left Override (RLO) character (U+202E) is a Unicode control character used for bidirectional text formatting. It affects the way text is displayed, causing text following the RLO character to be rendered from right to left, which is typically used in languages like Arabic and Hebrew.
However, malicious actors have found a way to exploit this Unicode …
Read moreManipulating Debug Logs
Using the sed -i command, specific entries in debug logs, such as errors (segfault, SystemError) or trace information (e.g., filenames like main.cc), are surgically removed. This allows attackers to target only incriminating evidence without erasing the entire log file. The process preserves the structure and authenticity of the log while removing key evidence of exploitation or system errors.
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Read moreDeleting Troubleshoot Information and Core Dumps
Commands like rm -rf /data/var/statedumps/* and rm -rf /data/var/cores/* delete state dumps and core dumps, which are generated when processes crash. These files contain memory snapshots, stack traces, and runtime states of processes at the time of failure. They are often used to debug and understand the causes of crashes or application malfunctions.
Attackers use this technique to eliminate …
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