Ransomware_6c0e73b795

by malwarelabrobot on November 25th, 2013 in Malware Descriptions.

Gen:Variant.Strictor.36755 (BitDefender), Trojan.Win32.Agent.acspq (Kaspersky), Trojan.Win32.Generic.pak!cobra (VIPRE), Gen:Variant.Strictor.36755 (B) (Emsisoft), Artemis!6C0E73B79578 (McAfee), Gen:Variant.Strictor.36755 (FSecure), Win32:Malware-gen (Avast)
Behaviour: Trojan


The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

Summary
Technical Details
Removal Recommendations

MD5: 6c0e73b795787d651606847d73bc326e
SHA1: 084295cfa412c1944eff647442354b8d2a9948f3
SHA256: 25bc4af0cc5b3c90076caa522a11267a94e23d2855d244cea1e097af9d6723e0
SSDeep: 3072:wQWd9gKeeq0vjIWzd8HMpUMd7GhGSPD1ZZRGd5t5VlqNJJ542bHpu9ZDtvLoHTdD:coKbqUjIAyId7CPD0lqNJJ545ZJsNZJ
Size: 237056 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: no certificate found
Created at: 2013-11-10 01:57:43


Summary:

Ransomware. Disables the compromised computer or restricts access to certain data so that the victim can no longer use it. The victim is expected to send payment to the hijacker to restore access to the blocked data or re-enable the system.

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

REG.exe:1472

The Trojan injects its code into the following process(es):

%original file name%.exe:320

File activity

The process %original file name%.exe:320 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Главное меню\Программы\Автозагрузка%original file name%.exe (237056 bytes)
%Documents and Settings%\%current user%\Local Settings\Application Data\GDIPFONTCACHEV1.DAT (18432 bytes)

Registry activity

The process %original file name%.exe:320 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "F8 00 70 11 F4 33 84 6A AB 65 61 C7 C7 74 6F 04"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Startup" = "%Documents and Settings%\%current user%\Главное меню\Программы\Автозагрузка"
"Local AppData" = "%Documents and Settings%\%current user%\Local Settings\Application Data"

[HKCU\Software\Microsoft\GDIPlus]
"FontCachePath" = "%Documents and Settings%\%current user%\Local Settings\Application Data"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\c:]
"%original file name%.exe" = "c:\"

The process REG.exe:1472 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:
Task Manager is disabled:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System]
"DisableTaskMgr" = "1"

Network activity (URLs)

No activity has been detected.

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Screenshot


Remove it with Ad-Aware

  1. Click (here) to download and install Ad-Aware Free Antivirus.
  2. Update the definition files.
  3. Run a full scan of your computer.


Manual removal*

  1. Terminate malicious process(es) (How to End a Process With the Task Manager):

    REG.exe:1472

  2. Delete the original Trojan file.
  3. Delete or disinfect the following files created/modified by the Trojan:

    %Documents and Settings%\%current user%\Главное меню\Программы\Автозагрузка%original file name%.exe (237056 bytes)
    %Documents and Settings%\%current user%\Local Settings\Application Data\GDIPFONTCACHEV1.DAT (18432 bytes)

  4. Delete the following value(s) in the autorun key (How to Work with System Registry):

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\c:]
    "%original file name%.exe" = "c:\"

  5. Reboot the computer.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.