Should I block it?

90%
90% of PCs block this file from running.
Possible reason:
Multiple malware detections

VersionsAdditional versions

1, 0, 0, 596 16.33%
1, 0, 0, 556 8.16%
1, 0, 0, 549 2.04%
1, 0, 0, 548 2.04%
1, 0, 0, 545 24.49%
1, 0, 0, 501 4.08%
1, 0, 0, 501 2.04%
1, 0, 0, 493 8.16%
1, 0, 0, 462 22.45%
1, 0, 0, 453 2.04%
1, 0, 0, 448 2.04%
1, 0, 0, 339 2.04%
1, 0, 0, 241 2.04%
1, 0, 0, 210 2.04%

Relationships

Parent processes
Related files

PE structurePE file structure

Show functions
Import table
advapi32.dll
ControlService, RegCloseKey, RegQueryValueExW, LookupAccountNameW, ConvertStringSidToSidW, GetLengthSid, SetTokenInformation, GetUserNameW, AllocateAndInitializeSid, FreeSid, EqualSid, RegEnumValueW, QueryServiceStatus, QueryServiceStatusEx, DeleteService, OpenSCManagerW, CreateServiceW, OpenServiceW, ChangeServiceConfigW, CloseServiceHandle, ChangeServiceConfig2W, StartServiceW, StartServiceCtrlDispatcherW, RegisterServiceCtrlHandlerW, SetServiceStatus, RegQueryInfoKeyW, RegDeleteValueW, CreateProcessAsUserW, DuplicateTokenEx, RegSetValueExW, RegEnumKeyExW, RegDeleteKeyW, RegOpenKeyExW, OpenProcessToken, GetTokenInformation, LookupAccountSidW, ConvertSidToStringSidW, RegCreateKeyExW, InitializeSecurityDescriptor, SetSecurityDescriptorDacl, LookupPrivilegeValueW, AdjustTokenPrivileges, SetEntriesInAclW
comctl32.dll
InitCommonControlsEx, _TrackMouseEvent
gdi32.dll
GetObjectW, CreateSolidBrush, SelectObject, CreateFontIndirectW, DeleteDC, DPtoLP, GetDeviceCaps, GetStockObject, SetBkMode, SetTextColor, CreateCompatibleDC, SetViewportOrgEx, CreateCompatibleBitmap, MoveToEx, LineTo, CreatePen, BitBlt, DeleteObject
kernel32.dll
DllMain
ole32.dll
CoGetClassObject, OleLockRunning, StringFromGUID2, CLSIDFromProgID, CoUninitialize, CoTaskMemFree, CoCreateInstance, CoTaskMemAlloc, CLSIDFromString, OleInitialize, CreateStreamOnHGlobal, CoInitialize, CoCreateGuid, OleUninitialize, StringFromCLSID, CoTaskMemRealloc
psapi.dll
EnumProcesses, EnumProcessModules, GetModuleFileNameExW, GetModuleBaseNameW, GetProcessImageFileNameA
rpcrt4.dll
RpcMgmtWaitServerListen, RpcServerUnregisterIf, NdrServerCall2, NdrClientCall2, RpcStringBindingComposeW, RpcBindingFromStringBindingW, RpcBindingSetOption, RpcBindingFree, RpcStringFreeW, RpcServerUseProtseqEpW, RpcServerRegisterIf, RpcServerListen, RpcMgmtStopServerListening
shell32.dll
ShellExecuteW, CommandLineToArgvW, SHGetSpecialFolderPathW, SHGetFolderPathW, ShellExecuteExW, FindExecutableW
shlwapi.dll
PathIsURLW, PathFindFileNameW, wvnsprintfA
urlmon.dll
CoInternetParseUrl
user32.dll
IsWindow, ShowWindow, GetClientRect, SendMessageW, GetWindowTextLengthW, GetWindowTextW, GetDlgItem, GetWindowLongW, CreateWindowExW, SetWindowLongW, wsprintfW, LoadStringA, LoadStringW, GetParent, SetWindowTextW, SetWindowPos, DrawTextW, DefWindowProcW, ReleaseDC, GetDC, CharNextW, OffsetRect, SetRectEmpty, LoadCursorW, GetClassNameW, DestroyWindow, ScreenToClient, UpdateWindow, InvalidateRect, IsWindowEnabled, SetCapture, SetFocus, GetDlgCtrlID, CallWindowProcW, PtInRect, FillRect, IsWindowVisible, DrawFocusRect, UnregisterClassA, CharUpperW, CharLowerW, EnableWindow, PostQuitMessage, SetTimer, EndDialog, MapDialogRect, IsDialogMessageW, SetWindowContextHelpId, CreateDialogIndirectParamW, RegisterWindowMessageW, CreateAcceleratorTableW, RegisterClassExW, GetClassInfoExW, GetWindow, DestroyAcceleratorTable, GetDesktopWindow, IsChild, RedrawWindow, InvalidateRgn, ClientToScreen, MoveWindow, CreateDialogParamW, PostMessageW, MessageBoxW, PeekMessageW, GetMessageW, TranslateMessage, DispatchMessageW, SystemParametersInfoW, KillTimer, GetWindowRect, MapWindowPoints, GetSystemMetrics, LoadImageW, GetSysColor, GetFocus, GetCapture, ReleaseCapture, EndPaint, BeginPaint, GetCursorPos, SetCursor, wsprintfA
userenv.dll
DestroyEnvironmentBlock, CreateEnvironmentBlock, UnloadUserProfile, LoadUserProfileW
version.dll
VerQueryValueW, GetFileVersionInfoW, GetFileVersionInfoSizeW
wininet.dll
InternetOpenUrlW, InternetCloseHandle, InternetSetOptionW, InternetOpenW, InternetReadFile, InternetQueryDataAvailable, HttpQueryInfoW
ws2_32.dll
freeaddrinfo, WSARecv, WSASend, WSASocketW, getaddrinfo
wtsapi32.dll
WTSFreeMemory, WTSEnumerateSessionsW, WTSQueryUserToken

GuardMailRu.exe

GuardMailRu Module by LLC Mail.Ru (Signed)

Remove GuardMailRu.exe
Version:   1, 0, 0, 549
MD5:   1e2a7c50ddf572d8b44eafb58d170ca3
SHA1:   ee54ab27653f045ebd2c5d8bc693d8751502ecff
SHA256:   6e48800e7da76ff2365772aa9fb410d7598ac94e0eab235989f25970db11663f
Warning 3 antivirus scanners has detected malware.

Overview

guardmailru.exe is malware that runs as a service under the name Guard.Mail.ru with extensive SYSTEM privileges (full administrator access). It is set to be start when the PC boots and any user logs into Windows (added to the Run registry key for the all users under the local machine). It is installed with a couple of know programs including [email protected] published by Mail.Ru, [email protected] from Mail.Ru and [email protected] by Mail.Ru. The file is digitally signed by LLC Mail.Ru which was issued by the Thawte certificate authority (CA).

DetailsDetails

File name:guardmailru.exe
Product name:GuardMailRu Module
Typical file path:C:\Program Files\mail.ru\guard\guardmailru.exe
File version:1, 0, 0, 549
Size:2.28 MB (2,392,096 bytes)
Build date:6/28/2013 5:31 PM
Certificate
Issued to:LLC Mail.Ru
Authority (CA):Thawte
Effective date:Monday, September 12, 2011
Expiration date:Wednesday, July 2, 2014
Digital DNA
PE subsystem:Windows GUI
File packed:No
.NET CLR:No
More details

ResourcesPrograms

The following programs will install this file
Mail.Ru
42% remove
[email protected] is part of the Guard Mail service.
Mail.Ru
42% remove
Guard.Mail.ru is part of the Guard Mail service.

BehaviorsBehaviors

Services
Runs under 'SYSTEM\CurrentControlSet\Services' by the Service Controller (services.exe)
  • 'Guard.Mail.ru'
Startup files (all users) run
Runs under the registry key 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run'
  • 'Guard.Mail.ru.gui' → "C:\Program Files\Mail.Ru\Guard\GuardMailRu.exe" /gui
Network connections
  • [TCP] kojura.mail.ru (217.69.133.27:80)

  • MalwareMalware detections

    Based on 40+ industry antivirus scanners, 3 of them detected the following malware.
    Antivirus engineEngine versionDetection
    Kingsoft 2013.4.9.267 Win32.HeurC.KVM019.a.(kcloud)
    Rising Antivirus 24.81.03.04 Trojan.RuMail!4986
    Trend Micro HouseCall 9.700.0.1001 TROJ_GEN.F47V0715

    ResourcesResource utilization

    (Note: statistics below are averages based on a minimum sample size of 200 unique participants)
    Averages
     
    CPU
    Total CPU:0.00017337%
    0.028634%
    Kernel CPU:0.00007469%
    0.013761%
    User CPU:0.00009868%
    0.014873%
    Kernel CPU time:246,897,583 ms/min
    100,923,805ms/min
    Context switches:3/sec
    284/sec
    Memory
    Private memory:3.56 MB
    21.59 MB
    Private (maximum):8.82 MB
    Private (minimum):3.49 MB
    Non-paged memory:3.56 MB
    21.59 MB
    Virtual memory:71.12 MB
    140.96 MB
    Virtual memory (peak):77.38 MB
    169.69 MB
    Working set:4.2 MB
    18.61 MB
    Working set (peak):8.82 MB
    37.95 MB
    Resource allocations
    Threads:7
    12
    Handles:168
    600
    GUI GDI count:34
    103
    GUI GDI peak:35
    142
    GUI USER count:24
    49
    GUI USER peak:26
    71

    BehaviorsProcess properties

    Integrety level:System
    Platform:32-bit
    Command lines:
    • "C:\Program Files\mail.ru\guard\guardmailru.exe"
    • "C:\Program Files\mail.ru\guard\guardmailru.exe" /gui
    Owner:SYSTEM
    Windows Service
    Service name:Guard.Mail.ru
    Type:Win32OwnProcess
    Parent processes:

    Windows OS versionsDistribution by Windows OS

    OS versiondistribution
    Microsoft Windows XP 42.86%
    Windows 7 Ultimate 24.49%
    Windows 7 Home Basic 14.29%
    Windows 7 Home Premium 12.24%
    Windows 7 Professional 6.12%

    Distribution by countryDistribution by country

    Russia installs about 32.65% of GuardMailRu Module.

    OEM distributionDistribution by PC manufacturer

    PC Manufacturerdistribution
    ASUS 43.24%
    Samsung 13.51%
    Dell 10.81%
    Hewlett-Packard 10.81%
    GIGABYTE 8.11%
    American Megatrends 5.41%
    Lenovo 5.41%
    Acer 2.70%
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