ESET detects Spying Malware "Syndicasec.A" in action
Malware researchers at ESET have found one of the malicious code samples in the name of ESET, i.e. ESET named Win32/Syndicasec.A. ESET telemetry systems show that the infection scale is extremely small and strictly limited to Nepal and China. Previous versions of this threat were identified dating back to 2010.
The main payload is a piece of Javascript code registered in the Windows WMI subsystem. The threat uses fake blogs to discover its C&C servers, which are hosted on Tibet-related domains. The commands sent to ESET test machine infected for the purpose of this investigation were sent manually by the attacker and consisted in collecting information from the file system and the registry. The characteristics of this operation are very similar to previous campaigns of espionage against Tibetan activists such as OS X Lamadai and others.
Win32/Syndicasec uses an exploit to get access to a target computer in the first instance. ESET engine successfully stopped the exploitation attempt, but was unable to capture the original exploit itself. ESET looks at the malicious script contained in the “EventConsumer” object. The code is straightforward to analyze and almost self-documenting once properly formatted.
ESET has included the entire code for only a few interesting calls for the sake of brevity. Basically, the operator was browsing ESET file system and looking at detailed settings and operations on the infected machine, such as network settings, attached drives and running programs. The day after this visit, the operator sent another set of commands to gather some system information specific to our infected system. In this session, the commands sent by the operator had roughly the same purpose, but were done differently, strongly suggesting a different operator to the previous day.
This analysis showed an implementation of rather unusual techniques to build a stealthy and flexible backdoor. The lack of built-in commands prevents ESET from discovering the real end-goal of this operation. However, ESET can affirm that the various characteristics observed around this threat are similar to other espionage campaigns against Tibetan activists that ESET has observed.
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