TSPY_RANBYUS.USP
Trojan-Ransom.Wind32.Gimemo.blzi (Kaspersky), Win32/Injector.AWPQ trojan (ESET), Trojan.Zbot (Symantec)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Spyware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It attempts to steal information, such as user names and passwords, used when logging into certain banking or finance-related websites. It logs a user's keystrokes to steal information.
TECHNICAL DETAILS
176,299 bytes
EXE
Yes
11 Mar 2014
Steals information, Logs keystrokes, Connects to URLs/IPs
Arrival Details
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This spyware drops the following copies of itself into the affected system:
- %System%\machineupper32.exe
- %User Temp%\machineupper32.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- 87b3c64lkj48gd
It injects itself into the following processes as part of its memory residency routine:
- svchost.exe
- explorer.exe
It injects codes into the following process(es):
- BBClient.exe
- ContactNG.exe
- UniStream.exe
- bankcl.exe
- bclient.exe
- bcloader.exe
- bk.exe
- cbmain.exe
- cbsmain.dll
- cbsmain.exe
- clbank.exe
- client.exe
- client7.exe
- clmain.exe
- clntw32.exe
- el_cli.exe
- elbank.exe
- firefox.exe
- iexplore.exe
- inbank-start-ff.exe
- info.exe
- intpro.exe
- ip-client.exe
- iscc.exe
- java.exe
- javaw.exe
- kb_cli.exe
- loadmain.exe
- ntvdm.exe
- oncbcli.exe
- opera.exe
- putty.exe
- rclient.exe
- safari.exe
- selva_copy.exe
- sgbclient.exe
- startclient7.exe
- tiny.exe
- translink.exe
- wclnt.exe
- webmoney.exe
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\Run
Windows Debugger 32 = "%System%\machineupper32.exe"
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
Windows Debugger 32 = "%System%\machineupper32.exe"
Other System Modifications
This spyware adds the following registry keys:
HKEY_CURRENT_USER\Software\BIFIT
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Winlogon
SysDebug32 = "{encrypted values}"
Information Theft
This spyware attempts to steal information from the following banks and/or other financial institutions:
- https://ibank.alfabank.ru
It logs a user's keystrokes to steal information.
Stolen Information
This spyware sends the gathered information via HTTP POST to the following URL:
- http://www.{BLOCKED}r.su/profit_new2/index.php?id={OS version and generated hash}&session={value}&v={value}&name={string}&mj={Major OS version}&mi={Minor OS version}&pt={OS product type}&b={OS build}&dc={32/64}&av={value}
Other Details
This spyware checks for the presence of the following process(es):
- ashdisp.exe
- ashmailsv.exe
- ashserv.exe
- ashwebsv.exe
- aswupdsv.exe
- avconsol.exe
- avfwsvc.exe
- avgnt.exe
- avguard.exe
- avmailc.exe
- avp.exe
- avsynmgr.exe
- avwebgrd.exe
- cfp.exe
- cmdagent.exe
- drweb.exe
- ekrn.exe
- equi.exe
- nabagent.exe
- nabmonitor.exe
- nabwatcher
- nortonantibot.exe
- vshwin32.exe
NOTES:
This spyware monitors browser applications to check if certain banking or finance-related websites are being accessed.
SOLUTION
9.700
10.660.08
13 Mar 2014
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Restart in Safe Mode
Step 3
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
- Windows Debugger 32 = "%System%\machineupper32.exe"
- Windows Debugger 32 = "%System%\machineupper32.exe"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- Windows Debugger 32 = "%System%\machineupper32.exe"
- Windows Debugger 32 = "%System%\machineupper32.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
- SysDebug32 = "{encrypted values}"
- SysDebug32 = "{encrypted values}"
Step 4
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_RANBYUS.USP. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
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