Ransomware_4f0f38bad8

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

Gen:Variant.Kazy.289928 (BitDefender), HEUR:Trojan.Win32.Generic (Kaspersky), Gen:Variant.Kazy.289928 (B) (Emsisoft), Bot-FIG!4F0F38BAD827 (McAfee), Trojan.Ransomlock!g63 (Symantec), Trojan.Win32.Reveton (Ikarus), Gen:Variant.Kazy.290464 (FSecure), Win32/Cryptor (AVG), Win32:Reveton-YG [Trj] (Avast), Backdoor.Win32.PcClient.FD, Trojan.Win32.IEDummy.FD, Trojan.Win32.Sasfis.FD, GenericInjector.YR (Lavasoft MAS)
Behaviour: Trojan, Ransomware


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: 4f0f38bad8279cc0705cf6dd563c6bc6
SHA1: a0057891ee8774545916b9a0de094f8996dbb7e8
SHA256: 67a4c67ff6b7ca151bda7accd791cc864869e079c66568cb60ee8cb7bba1ada2
SSDeep: 3072:pK505ep/kbpDsiPBTV43qxqqh32evVasONbq:W0SSDRVYqxh2AONb
Size: 156160 bytes
File type: DLL
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2013-11-14 05:28:59


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 Ransomware creates the following process(es):

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

regsvr32.exe:1992
rundll32.exe:2028
rundll32.exe:1820

File activity

The process regsvr32.exe:1992 makes changes in the file system.
The Ransomware creates and/or writes to the following file(s):

%Documents and Settings%\All Users\Application Data\27dtfl1.dss (164340 bytes)

The process rundll32.exe:2028 makes changes in the file system.
The Ransomware creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%Documents and Settings%\All Users\Application Data\1lftd72.bxx (191349773 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\27dtfl1.dss (164340 bytes)

The process rundll32.exe:1820 makes changes in the file system.
The Ransomware creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Главное меню\Программы\Автозагрузка\1lftd72.lnk (704 bytes)

Registry activity

The process regsvr32.exe:1992 makes changes in the system registry.
The Ransomware creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "3E 9B 81 AD B4 5E 5E 7C 51 D5 5F 30 31 8E 86 6D"

The process rundll32.exe:2028 makes changes in the system registry.
The Ransomware creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "5E 23 B3 F6 E8 5A 19 75 43 05 A7 52 0D 29 2A F3"

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65324"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65324"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65324"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache3"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Paths" = "4"

[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"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65324"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Personal" = "%Documents and Settings%\%current user%\Мои документы"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"

The process rundll32.exe:1820 makes changes in the system registry.
The Ransomware creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "91 57 C8 A4 BD B5 1E A6 A7 2B 51 A4 54 2C D2 A3"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Documents" = "%Documents and Settings%\All Users\Документы"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Desktop" = "%Documents and Settings%\%current user%\Рабочий стол"
"My Pictures" = "%Documents and Settings%\%current user%\Мои документы\Мои рисунки"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d45-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{d8c0d8da-77bd-11e0-bb02-000c293bc0fd}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"CommonPictures" = "%Documents and Settings%\All Users\Документы\Мои рисунки"
"CommonMusic" = "%Documents and Settings%\All Users\Документы\Моя музыка"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{91167d42-103d-11db-8c91-806d6172696f}]
"BaseClass" = "Drive"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Desktop" = "%Documents and Settings%\All Users\Рабочий стол"
"CommonVideo" = "%Documents and Settings%\All Users\Документы\Мои видеозаписи"
"Common Start Menu" = "%Documents and Settings%\All Users\Главное меню"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Start Menu" = "%Documents and Settings%\%current user%\Главное меню"
"Personal" = "%Documents and Settings%\%current user%\Мои документы"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{ebcf8d94-66db-11de-b228-806d6172696f}]
"BaseClass" = "Drive"

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 the original Ransomware's process (How to End a Process With the Task Manager).
  2. Delete the original Ransomware file.
  3. Delete or disinfect the following files created/modified by the Ransomware:

    %Documents and Settings%\All Users\Application Data\27dtfl1.dss (164340 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
    %Documents and Settings%\All Users\Application Data\1lftd72.bxx (191349773 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\27dtfl1.dss (164340 bytes)
    %Documents and Settings%\%current user%\Главное меню\Программы\Автозагрузка\1lftd72.lnk (704 bytes)

  4. Reboot the computer.

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