Data stealing trojan found in the wild (August 14, 2015)

The Dell SonicWall Threats Research team has received reports of a Trojan which leaves no trace behind and steals information from the infected system which is spreading in the wild.

Infection Cycle:

The Trojan uses the following mutex:

• SHIMLIB_LOG_MUTEX

Upon looking at the properties, the trojan is described as an application in Chinese, named Aspirate.

Upon execution, the Trojan creates a copy of itself in the following location:

• %Application Data%sample.exe [Detected as GAV: Crowti.A_86 (Trojan)]

It creates a autostart object at:

• C:Documents and SettingsAdminStart MenuProgramsStartupsample.exe

In order to start after reboot the malware creates the following registry key:

• %%USER%softwaremicrosoftwindowscurrentversionrun[sample.exe][Detected as GAV: Crowti.A_86 (Trojan)]

To make removal even more difficult, it disables the System Restore:

• HKLMsoftwaremicrosoftwindows ntcurrentversionsystemrestore[disablesr]

The trojan executes these commands:

• C:Windowssystem32svchost.exe -k netsvcs
• C:Windowssystem32vssadmin.exe vssadmin.exe Delete Shadows /All /Quiet
• bcdedit /set {default} recoveryenabled No
• bcdedit /set {default} bootstatuspolicy ignoreallfailures

It creates a file and tries to steal information at:

• %Admin%CookiesUIJNQI9V.txt

It tries to connect to the following domains:

• ip-address.es
• ii-tavi.net
• japaneselink.net
• everestmarketinggroup.com
• www.e-m-g.covoutevirtuelle.com
• skprints.com
• kmreich.com
• imanaging.info
• karateserbia.org
• closed.loopia.rs
• easbrain.com
• pinoyjokes.org
• bettercatch.com

It does the following request multiple times to the C&C servers. Once it receives the reply, it sends encrypted information to the servers.

Dell SonicWALL Gateway AntiVirus and Intrusion Prevention provides protection against this threat with the following signatures:

• GAV: Crowti.A_86(Trojan)

Security News

The SonicWall Capture Labs Threat Research Team gathers, analyzes and vets cross-vector threat information from the SonicWall Capture Threat network, consisting of global devices and resources, including more than 1 million security sensors in nearly 200 countries and territories. The research team identifies, analyzes, and mitigates critical vulnerabilities and malware daily through in-depth research, which drives protection for all SonicWall customers. In addition to safeguarding networks globally, the research team supports the larger threat intelligence community by releasing weekly deep technical analyses of the most critical threats to small businesses, providing critical knowledge that defenders need to protect their networks.