RiskTool.Win32.BitCoinMiner_f865c19902

by malwarelabrobot on October 29th, 2013 in Malware Descriptions.

Trojan.Generic.9467074 (BitDefender), not-a-virus:RiskTool.Win32.BitCoinMiner.frk (Kaspersky), Trojan.Win32.Generic!BT (VIPRE), Trojan.BtcMine.156 (DrWeb), Trojan.Generic.9467074 (B) (Emsisoft), Artemis!F865C1990241 (McAfee), Win32.SuspectCrc (Ikarus), Trojan.Generic.9467074 (FSecure), Generic33.BQKR (AVG), Win32:BitCoinMiner-CA [Trj] (Avast), HKTL_BITMINE.SML (TrendMicro), HackTool.Win32.RemoteAdmin.FD (Lavasoft MAS)
Behaviour: Trojan, RemoteAdmin, HackTool


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: f865c199024105a2ffdf5fa98f391d74
SHA1: f838fb106e39fe4d9804b1d65edbc58c1fc98713
SHA256: c80d165f662a216e0830d961f4a5ec969afe00a1dba331bd88a4bcdf064b928f
SSDeep: 12288:WJecTp 1JEX/eq8nPn/eb6GulDk73sFDmX8nPn/KNac6:6egcS2q8ub9ulDk7W 8aN0
Size: 589798 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2013-05-23 10:15:21


Summary:

HackTool. Can be used to investigate, analyze or compromise the system security. Some HackTools are multi-purpose programs, while others may have legitimate uses.
Potentially Unwanted Program. An application that does not display malicious behavior yet is installed without having first sought affirmative user consent for installation. Users may not realize, due to the nature of the installation procedure, that an application they have not explicitly agreed to has been installed. This category can also be used to classify other applications which in a certain context can be wanted e.g. remote administration tools or IRC clients.

Payload

No specific payload has been found.

Process activity

The HackTool creates the following process(es):

nircmd.exe:628
f865c199024105a2ffdf5fa98f391d74.exe:420
attrib.exe:1348
reg.exe:1940
system.exe:196

File activity

The process f865c199024105a2ffdf5fa98f391d74.exe:420 makes changes in a file system.
The HackTool creates and/or writes to the following file(s):

%WinDir%\syso\critical\libcurl-4.dll (245795 bytes)
%WinDir%\syso\critical\system.exe (187904 bytes)
%WinDir%\syso\critical\pthreadGC2.dll (119888 bytes)
%WinDir%\syso\critical\antivirus.bat (108 bytes)
%WinDir%\syso\critical\sys.bat (337 bytes)
%WinDir%\syso\critical\zlib1.dll (100864 bytes)
%WinDir%\syso\critical\libcurl.dll (245795 bytes)
%WinDir%\syso\critical\nircmd.exe (43520 bytes)

The HackTool deletes the following file(s):

%WinDir%\syso\__tmp_rar_sfx_access_check_2265734 (0 bytes)

Registry activity

The process nircmd.exe:628 makes changes in a system registry.
The HackTool creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "3B 14 1D 04 3E B4 84 B8 A7 DA D2 48 68 A7 04 B7"

The process f865c199024105a2ffdf5fa98f391d74.exe:420 makes changes in a system registry.
The HackTool creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "86 FC 8B 8C F8 C8 4F 0C 4D 97 FA 4B 4A A3 FE 76"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\C:\Windows\syso\critical]
"sys.bat" = "sys"

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

[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"

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

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

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

[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"

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

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

The HackTool modifies IE settings for security zones to map all urls to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName" = "1"

The HackTool modifies IE settings for security zones to map all local web-nodes with no dots which do not refer to any zone to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"UNCAsIntranet" = "1"

The HackTool modifies IE settings for security zones to map all web-nodes that bypassing proxy to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass" = "1"

The process attrib.exe:1348 makes changes in a system registry.
The HackTool creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "97 64 90 E1 2A DA 4A AC 14 0B D9 AB F9 8C 76 CA"

The process reg.exe:1940 makes changes in a system registry.
The HackTool creates and/or sets the following values in system registry:
To automatically run itself each time Windows is booted, the HackTool adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Windows Update" = "C:\Windows\syso\critical\antivirus.bat"

The process system.exe:196 makes changes in a system registry.
The HackTool creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "FE 24 99 EC 51 6F E5 BF DD 53 2B 3B 0B C4 17 D7"

Network activity (URLs)

No activity has been detected.

Rootkit activity

No anomalies have been detected.

Propagation


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):

    nircmd.exe:628
    f865c199024105a2ffdf5fa98f391d74.exe:420
    attrib.exe:1348
    reg.exe:1940
    system.exe:196

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

    %WinDir%\syso\critical\libcurl-4.dll (245795 bytes)
    %WinDir%\syso\critical\system.exe (187904 bytes)
    %WinDir%\syso\critical\pthreadGC2.dll (119888 bytes)
    %WinDir%\syso\critical\antivirus.bat (108 bytes)
    %WinDir%\syso\critical\sys.bat (337 bytes)
    %WinDir%\syso\critical\zlib1.dll (100864 bytes)
    %WinDir%\syso\critical\libcurl.dll (245795 bytes)
    %WinDir%\syso\critical\nircmd.exe (43520 bytes)

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

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "Windows Update" = "C:\Windows\syso\critical\antivirus.bat"

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