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Trojan.PWS.Banker1.28321

Added to Dr.Web virus database:2018-09-19
Virus description was added:2018-09-27

SHA1:

Downloader:

  • 0bc9a778a28ba6abba92330d750fc9769484a9a5
    e9b510a2c58638d00b8a4af7e4f49e8d3a52bcd3
    f2f2eb334719ef6b7a2a522a7eac6f33ee7c810d
    f4b49b874e3715926eaf56d574408a63353b2753
    f10e8e3362834843c9df8bdd5316912c8185e547
    f494bc28a86332db98efbb049b9f9981ef24fd8b
    f5846e4990aa5af2f7e1268223b1710415f11459
    fb64604fbbbdfa888aeb090df7008c15b2e25fe6
    fe2924d1e3d5215273e672e1ea4bb2b1ee57e5e8
        

VBScript

  • 9dbc627eae65c147f996ef2a524ed89603ade13c
    b8b4fc9efccbeddc39ee0d825ed2e3037ee85efc
    c71e5f572a659774ab0c0a52da40013709408823
        

Dynamic libraries:

  • 2f7be7a0649288a9bb72fad0e5fb2a38031edf9b
    6c83a4a362c730066c63986369213ce05c666e35
    5fa08c5e4595040c89540ef1194d53916ba5820c
    7c5f3e935bfc1deb0460b9c9649cf75568cdbb71
    8611f08c570a1dcf42b7d2961a3757367eb650a0
    f18a4ed258540e3b0da4c3d66d144317a6f23066
        

The banking Trojan for Windows, targeted to Brazilian credit organizations customers. Written in .NET, the bootloader is implemented as an obfuscated VBScript script, which is launched using msscriptcontrol. Distributed under the guise of the Adobe Reader application.

Launched, the script checks the local Windows settings for the presence of the Portuguese language ("1046") and also looks for the virtual machine in the environment:


   Select Case sBIOSVersion
        Case "VRTUAL - 1000831"
            bIsVM = true
            sVMPlatform = "Hyper-V 2008 Beta or RC0"
        CCase "VRTUAL - 5000805", "BIOS Date: 05/05/08 20:35:56  Ver: 08.00.02"
            bIsVM = true
            sVMPlatform = "Hyper-V 2008 RTM"
        Case "VRTUAL - 3000919"
            bIsVM = true
            sVMPlatform = "Hyper-V 2008 R2"
        Case "A M I  - 2000622"
            bIsVM = true
            sVMPlatform = "VS2005R2SP1 or VPC2007"
        Case "A M I  - 9000520"
            bIsVM = true
            sVMPlatform = "VS2005R2"
        Case "A M I  - 9000816", "A M I  - 6000901"
            bIsVM = true
            sVMPlatform = "Windows Virtual PC"
        Case "A M I  - 8000314"
            bIsVM = true
            sVMPlatform = "VS2005 or VPC2004"
        End Select
    ElseIf sModel = "VMware Virtual Platform" then
        ' VMware detected
        sVMPlatform = "VMware"
        bIsVM = true
    ElseIf sModel  = "VirtualBox" then
        ' VirtualBox detected
        bIsVM = true
        sVMPlatform = "VirtualBox"
    Else
        ' This computer does not appear to be a virtual machine.
    End if

Connected with the managing server, which address is encrypted in the body of the Trojan, the banker downloads from there two ZIP-archives with obfuscated dynamic libraries created in the Delphi development environment. The second library contains the main malicious functions of the Trojan.

When users open Internet bank sites of a number of Brazilian financial institutions in the browser window, Trojan.PWS.Banker1.28321 imperceptibly substitutes the web page, showing the victim a fake authentication form and in some cases requests an authorization verification code from the SMS message received from the bank. This information is transmitted by the Trojan to cybercriminals.

News about the Trojan

Curing recommendations

  1. If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
  2. If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
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  1. If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
  2. If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
    • Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
    • Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
    • Switch off your device and turn it on as normal.

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