Virus: TR/Obisty.A Date discovered: 19/12/2012 Type: Trojan In the wild: No Reported Infections: Medium Distribution Potential: Low Damage Potential: Medium Static file: Yes File size: 148.992 Bytes MD5 checksum: 89FA070B12AEE94C97F15AFBC8404E00 VDF version: 7.11.54.86 - Wednesday, December 19, 2012IVDF version: 7.11.54.86 - Wednesday, December 19, 2012
General Method of propagation: • By visiting infected websites Similar detection: • JS/Redirector.SB • EXP/Pidief.zar Platforms / OS: • Windows 2000 • Windows XP • Windows 2003 • Windows Vista • Windows Server 2008 • Windows 7 Side effects: • Third party control • Registry modification • Steals information Files It copies itself to the following location: • %APPDATA%\KB%eight-digit random character string% .exe The following file is created: – %TEMPDIR% \exp3.tmp.bat Furthermore it gets executed after it was fully created. This batch file is used to delete a file. Registry The following registry key is added in order to run the process after reboot: – HKCU\Software\Microsoft\Windows\CurrentVersion\Run • %APPDATA%\KB%eight-digit random character string% .exe Backdoor Contact server: One of the following: • http://84.22.100.108:8080/%random character string% /%random character string% /%random character string% • http://182.237.17.180:8080/%random character string% /%random character string% /%random character string% • http://123.49.61.59:8080/%random character string% /%random character string% /%random character string% • http://204.15.30.202:8080/%random character string% /%random character string% /%random character string% • http://64.76.19.236:8080/%random character string% /%random character string% /%random character string% • http://59.90.221.6:8080/%random character string% /%random character string% /%random character string% • http://210.56.23.100:8080/%random character string% /%random character string% /%random character string% • http://94.73.129.120:8080/%random character string% /%random character string% /%random character string% • http://174.143.174.136:8080/%random character string% /%random character string% /%random character string% • http://203.217.147.52:8080/%random character string% /%random character string% /%random character string% • http://74.207.237.170:8080/%random character string% /%random character string% /%random character string% • http://23.29.73.220:8080/%random character string% /%random character string% /%random character string% • http://69.64.89.82:8080/%random character string% /%random character string% /%random character string% • http://74.63.229.10:8080/%random character string% /%random character string% /%random character string% • http://74.86.113.66:8080/%random character string% /%random character string% /%random character string% • http://174.121.188.156:8080/%random character string% /%random character string% /%random character string% • http://50.22.94.96:8080/%random character string% /%random character string% /%random character string% • http://173.203.102.204:8080/%random character string% /%random character string% /%random character string% • http://74.117.107.25:8080/%random character string% /%random character string% /%random character string% • http://174.142.68.239:8080/%random character string% /%random character string% /%random character string% • http://188.212.156.170:8080/%random character string% /%random character string% /%random character string% • http://188.120.226.30:8080/%random character string% /%random character string% /%random character string% • http://78.28.120.32:8080/%random character string% /%random character string% /%random character string% • http://217.65.100.41:8080/%random character string% /%random character string% /%random character string% • http://81.93.250.157:8080/%random character string% /%random character string% /%random character string% • http://188.40.109.204:8080/%random character string% /%random character string% /%random character string% As a result it may send information and remote control could be provided. This is done via the HTTP POST method using a PHP script. Injection – It injects itself as a thread into processes. It is injected into all processes. File details Programming language: The malware program was written in MS Visual C++. Runtime packer: In order to aggravate detection and reduce size of the file it is packed with a runtime packer.
Description inserted by Liviu Serban on Wednesday, December 19, 2012 Description updated by Andrei Gherman on Wednesday, December 19, 2012
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