Trojan.Win32.Gupd.gv_10cddd3a3d

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

%original file name%.exe:980
cscript.exe:2016
scrcons.exe:1484

The Trojan injects its code into the following process(es):No processes have been created.

File activity

The process %original file name%.exe:980 makes changes in the file system.

The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\~tmpinst.js (4 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\~tmpinst.js (0 bytes)

The process scrcons.exe:1484 makes changes in the file system.

The Trojan creates and/or writes to the following file(s):

%System%\config\systemprofile\Cookies\system@heyyoyoyo.blogsmakers[1].txt (448 bytes)
%System%\config\systemprofile\Cookies\index.dat (388 bytes)
%System%\config\systemprofile\Local Settings\Temporary Internet Files\Content.IE5\89IBS567\RSS-b1-rss2-posts[1].xml (1004 bytes)

Registry activity

The process %original file name%.exe:980 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "07 C9 D3 6B 0D E3 CE F7 6D 30 57 9F CF DB 2A E4"

The process cscript.exe:2016 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "5B 57 B1 E0 C4 42 E8 57 83 23 2D A9 7A 4E B8 BF"

The process scrcons.exe:1484 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E4 82 FD 0F 2B 1C B2 F4 6F EB A9 AC F5 91 41 11"

[HKU\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%System%\config\systemprofile\Cookies"

[HKU\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 03 00 00 00 01 00 00 00 00 00 00 00"

[HKLM\System\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CachePath" = "%System%\config\systemprofile\Local Settings\Temporary Internet Files\Content.IE5\Cache2"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%System%\config\systemprofile\Local Settings\Temporary Internet Files\Content.IE5\Cache1"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65452"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65452"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%System%\config\systemprofile\Local Settings\Temporary Internet Files\Content.IE5"

[HKU\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%System%\config\systemprofile\Local Settings\History"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65452"
"CachePath" = "%System%\config\systemprofile\Local Settings\Temporary Internet Files\Content.IE5\Cache4"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%System%\config\systemprofile\Local Settings\Temporary Internet Files\Content.IE5\Cache3"

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

[HKU\.DEFAULT\Software\Microsoft\Windows Script\Settings]
"JITDebug" = "0"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"

[HKU\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%System%\config\systemprofile\Local Settings\Temporary Internet Files"

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

[HKU\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName" = "1"

The Trojan 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:

"UNCAsIntranet" = "1"

Proxy settings are disabled:

[HKU\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

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

[HKU\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass" = "1"

The Trojan deletes the following value(s) in system registry:

[HKU\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyOverride"
"AutoConfigURL"
"ProxyServer"

Network activity (URLs)

No activity has been detected.

HOSTS file anomalies

No changes have 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):

   %original file name%.exe:980
   cscript.exe:2016
   scrcons.exe:1484

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

   %Documents and Settings%\%current user%\Local Settings\Temp\~tmpinst.js (4 bytes)
   %System%\config\systemprofile\Cookies\system@heyyoyoyo.blogsmakers[1].txt (448 bytes)
   %System%\config\systemprofile\Cookies\index.dat (388 bytes)
   %System%\config\systemprofile\Local Settings\Temporary Internet Files\Content.IE5\89IBS567\RSS-b1-rss2-posts[1].xml (1004 bytes)

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

Static Analysis

Network Activity

Map

Strings from Dumps