Gen.Variant.Daytre.2_4b81f67608

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

ewajo.exe:456
%original file name%.exe:1816
papers.exe:1768
paper.exe:164

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

Explorer.EXE:1140

Mutexes

The following mutexes were created/opened:No objects were found.

File activity

The process ewajo.exe:456 makes changes in the file system.

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

%Documents and Settings%\%current user%\NTUSER.DAT.LOG (6096 bytes)
%Documents and Settings%\%current user%\NTUSER.DAT (5036 bytes)

The process %original file name%.exe:1816 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\papers.exe (16 bytes)

The process papers.exe:1768 makes changes in the file system.

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

%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\pdf[1].exe (1765 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\MetaData\2BF68F4714092295550497DD56F57004 (408 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\paper.exe (1765 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Cab1.tmp (54 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\Content\2BF68F4714092295550497DD56F57004 (18 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Tar2.tmp (2712 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\Tar2.tmp (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Cab1.tmp (0 bytes)

The process paper.exe:164 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\PKQCA10.bat (173 bytes)
%Documents and Settings%\%current user%\Application Data\Oluli\ewajo.exe (3557 bytes)

Registry activity

The process ewajo.exe:456 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "ED 78 0D CF 03 33 3D 42 A7 56 0F 9B C2 63 9C 5B"

[HKCU\Software\Microsoft\Noobewelo]
"3012ei14" = "Du6qjAK0IhE2dHkZde qVnXmvqLLHQDnMCM="

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

The process %original file name%.exe:1816 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "92 1B 91 05 42 6B 4D D4 97 D0 9F 31 28 26 BB 99"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

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

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

[HKLM\SOFTWARE\Microsoft\Direct3D\MostRecentApplication]
"Name" = "%original file name%.exe"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

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

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp]
"papers.exe" = "papers"

The Trojan 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 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"

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

"ProxyBypass" = "1"

The process papers.exe:1768 makes changes in the system registry.

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[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\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65452"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"

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

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

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

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

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

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

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

"Desktop" = "%Documents and Settings%\%current user%\Desktop"

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 1B 00 00 00 01 00 00 00 00 00 00 00"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "5F 0C 20 68 34 59 9A 57 69 5E 82 32 0C 79 8C F5"

[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\Direct3D\MostRecentApplication]
"Name" = "papers.exe"

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"

[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]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp]
"paper.exe" = "paper"

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:

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

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

"ProxyBypass" = "1"

Proxy settings are disabled:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"

The process paper.exe:164 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "74 0F D0 57 48 0C 2D 23 01 99 09 5F 0E 53 B8 19"

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

Dropped PE files

MD5	File path
5c83ae880ab9c2f6f04ed4aed08a1853	c:\Documents and Settings\"%CurrentUserName%"\Application Data\Oluli\ewajo.exe
9631349af358f24d5bd75597c905e584	c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\papers.exe
a549d4e7a7687f00b72c61d1a4025442	c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\pdf[1].exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

The Trojan installs the following user-mode hooks in WININET.dll:

HttpSendRequestExA
HttpSendRequestW
InternetReadFileExA
InternetWriteFile
InternetWriteFileExA
InternetQueryDataAvailable
HttpQueryInfoW
HttpSendRequestExW
InternetReadFile
HttpQueryInfoA
HttpSendRequestA
InternetCloseHandle

The Trojan installs the following user-mode hooks in CRYPT32.dll:

PFXImportCertStore

The Trojan installs the following user-mode hooks in USER32.dll:

GetClipboardData
TranslateMessage

The Trojan installs the following user-mode hooks in Secur32.dll:

DecryptMessage
SealMessage
DeleteSecurityContext

The Trojan installs the following user-mode hooks in WS2_32.dll:

WSAGetOverlappedResult
WSASend
recv
gethostbyname
WSARecv
send
closesocket
freeaddrinfo
getaddrinfo
GetAddrInfoW

The Trojan installs the following user-mode hooks in ntdll.dll:

LdrLoadDll
NtCreateThread

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. Scan a system with an anti-rootkit tool.
   
2. Terminate malicious process(es) (How to End a Process With the Task Manager):

   ewajo.exe:456
   %original file name%.exe:1816
   papers.exe:1768
   paper.exe:164
   

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

   %Documents and Settings%\%current user%\NTUSER.DAT.LOG (6096 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\papers.exe (16 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\pdf[1].exe (1765 bytes)
   %Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\MetaData\2BF68F4714092295550497DD56F57004 (408 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\paper.exe (1765 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\Cab1.tmp (54 bytes)
   %Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\Content\2BF68F4714092295550497DD56F57004 (18 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\desktop.ini (67 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\Tar2.tmp (2712 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\PKQCA10.bat (173 bytes)
   %Documents and Settings%\%current user%\Application Data\Oluli\ewajo.exe (3557 bytes)

5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
   
6. Reboot the computer.
   

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

Static Analysis

VersionInfo

No information is available.

No information is available.

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	3708	4096	4.15439	6035f1db60eb6e699a8c2520f9fa70cd
.rdata	8192	796	1024	3.41828	c4e333bdccd37eebc1587dc65a855fb2
.data	12288	3016	3072	4.52949	369eba19d8fc4a98e9e2cb0dfc7ddc9d
.rsrc	16384	4356	4608	3.39952	a1e93edc22a25a7d129e61b92ac41db4

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

URL	IP
hxxp://a26.d.akamai.net/msdownload/update/v3/static/trustedr/en/authrootseq.txt
hxxp://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootseq.txt	205.237.69.74
backpackinglight.com.au	69.4.235.215
littlepaperlane.com.au	206.190.139.245

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET /msdownload/update/v3/static/trustedr/en/authrootseq.txt HTTP/1.1

Accept: */*

User-Agent: Microsoft-CryptoAPI/5.131.2600.5512

Host: VVV.download.windowsupdate.com

Connection: Keep-Alive

Cache-Control: no-cache

Pragma: no-cache

HTTP/1.1 200 OK

Content-Type: text/plain

Last-Modified: Wed, 12 Mar 2014 05:29:31 GMT

Accept-Ranges: bytes

ETag: "806f4cbb43dcf1:0"

Server: Microsoft-IIS/7.5

X-Powered-By: ASP.NET

Content-Length: 18

Date: Sun, 27 Jul 2014 14:09:14 GMT

Connection: keep-alive

X-CCC: US

X-CID: 2

1401CF3DB40B609892HTTP/1.1 200 OK..Content-Type: text/plain..Last-Modified: Wed, 12 Mar 2014 05:29:31 GMT..Accept-Ranges: bytes..ETag: "806f4cbb43dcf1:0"..Server: Microsoft-IIS/7.5..X-Powered-By: ASP.NET..Content-Length: 18..Date: Sun, 27 Jul 2014 14:09:14 GMT..Connection: keep-alive..X-CCC: US..X-CID: 2..1401CF3DB40B609892..

Map

The Trojan connects to the servers at the folowing location(s):

Strings from Dumps

Explorer.EXE_1140_rwx_020F0000_00048000:

.text

.text

`.data

`.data

.idata

.idata

@.reloc

@.reloc

Invalid parameter passed to C runtime function.

Invalid parameter passed to C runtime function.

0123456789

0123456789

y.dpw|)aq&

y.dpw|)aq&

9755*#

9755*#

)8*<;1/5='#

)8*<;1/5='#

W}}quyJ2(!B>,%F:09Z

W}}quyJ2(!B>,%F:09Z

-0:)-:*<*:

-0:)-:*<*:

0: )4-* 4

0: )4-* 4

:1';$9/<</pre><pre>|r)-9%7s</pre><pre>=6 <#>(;</pre><pre>0;-1.3%6</pre><pre>http://www.google.com/</pre><pre>http://www.bing.com/</pre><pre>HTTP/1.1</pre><pre>gdiplus.dll</pre><pre>GdiplusShutdown</pre><pre>RegDeleteKeyExW</pre><pre>REPORT</pre><pre>userenv.dll</pre><pre>del "%s"</pre><pre>if exist "%s" goto d</pre><pre>del /F "%s"</pre><pre>t.Ht$HHt</pre><pre>m9.td</pre><pre>L$$</pre><pre>w%fkN</pre><pre>zcÁ</pre><pre>.fV@![</pre><pre>ntdll.dll</pre><pre>KERNEL32.dll</pre><pre>ExitWindowsEx</pre><pre>MsgWaitForMultipleObjects</pre><pre>GetKeyboardState</pre><pre>USER32.dll</pre><pre>CryptGetKeyParam</pre><pre>CryptImportKey</pre><pre>CryptDestroyKey</pre><pre>RegCreateKeyExW</pre><pre>RegCloseKey</pre><pre>RegQueryInfoKeyW</pre><pre>RegDeleteKeyW</pre><pre>RegOpenKeyExW</pre><pre>RegFlushKey</pre><pre>RegEnumKeyExW</pre><pre>ADVAPI32.dll</pre><pre>PathIsURLW</pre><pre>UrlUnescapeA</pre><pre>SHLWAPI.dll</pre><pre>ShellExecuteW</pre><pre>SHELL32.dll</pre><pre>Secur32.dll</pre><pre>ole32.dll</pre><pre>GDI32.dll</pre><pre>WS2_32.dll</pre><pre>PFXImportCertStore</pre><pre>CertDeleteCertificateFromStore</pre><pre>CertOpenSystemStoreW</pre><pre>CertCloseStore</pre><pre>CertEnumCertificatesInStore</pre><pre>CertDuplicateCertificateContext</pre><pre>PFXExportCertStoreEx</pre><pre>CRYPT32.dll</pre><pre>HttpSendRequestExA</pre><pre>HttpQueryInfoA</pre><pre>InternetCrackUrlA</pre><pre>HttpOpenRequestA</pre><pre>HttpEndRequestA</pre><pre>HttpAddRequestHeadersA</pre><pre>WININET.dll</pre><pre>OLEAUT32.dll</pre><pre>NETAPI32.dll</pre><pre>IPHLPAPI.DLL</pre><pre>VERSION.dll</pre><pre>msvcrt.dll</pre><pre>0 0$0(0,0004080<0</pre><pre>2 2$2(2,2024282</pre><pre>9,:0:4:8:<:</pre><pre>? ?%?>?`?|?</pre><pre>9!9,9 :@:</pre><pre>='>0>9>?></pre><pre>3#3'3 3/33373</pre><pre>kernel32.dll</pre><pre>shell32.dll</pre><pre>SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\%s</pre><pre>urlmon.dll</pre><pre>cabinet.dll</pre><pre>\StringFileInfo\xx\%s</pre><pre>Wadvapi32.dll</pre><pre>launchpadshell.exe</pre><pre>dirclt32.exe</pre><pre>wtng.exe</pre><pre>prologue.exe</pre><pre>pcsws.exe</pre><pre>fdmaster.exe</pre><pre>"%s" %s</pre><pre>/c "%s"</pre><pre>%Documents and Settings%\%current user%\Application Data</pre><pre>%Documents and Settings%\%current user%\Local Settings\Application Data</pre><pre>Global\{3D6E1BE3-083C-4088-F013-F140DE00D252}</pre>