RiskTool.Win32.BitCoinMiner_f865c19902

Dynamic Analysis

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

Removals

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.

Static Analysis

Network Activity

Map

Strings from Dumps