TrojanPSW.Win32.Zbot.4_dcb67a539a

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan-PSW creates the following process(es):

budha.exe:3012
kilf.exe:3980
dasu.exe:1692
%original file name%.exe:2856

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

Explorer.EXE:1948

Mutexes

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

File activity

The process budha.exe:3012 makes changes in the file system.

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

%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OVYHJBCC\profile_main[1].exe (1694 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\TarB3.tmp (2712 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\MetaData\2BF68F4714092295550497DD56F57004 (408 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\CabB2.tmp (54 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\TarB5.tmp (2712 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\OVYHJBCC\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\CabB4.tmp (54 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\kilf.exe (1694 bytes)

The Trojan-PSW deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\CabB4.tmp (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\CabB2.tmp (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\TarB3.tmp (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\TarB5.tmp (0 bytes)

The process kilf.exe:3980 makes changes in the file system.

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

%Documents and Settings%\%current user%\Application Data\Hyaqe\dasu.exe (2734 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\VOA7720.bat (171 bytes)

The process dasu.exe:1692 makes changes in the file system.

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

%Documents and Settings%\%current user%\ntuser.dat.LOG (5592 bytes)
%Documents and Settings%\%current user%\NTUSER.DAT (4788 bytes)

The process %original file name%.exe:2856 makes changes in the file system.

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

%Documents and Settings%\%current user%\Local Settings\Temp\budha.exe (21 bytes)

Registry activity

The process budha.exe:3012 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "14 B9 3D DB 25 F3 BB A6 4B 55 B3 2B 95 F7 53 B1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f3-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"AutoDetect" = "1"
[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp]
"kilf.exe" = "Administrations und Wartungsprogramm fur SQLite Datenbankdateien"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{773a730e-74fb-11e2-b597-000c293bdf2f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f2-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f5-7454-11e2-b4cd-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\Internet Settings\Connections]
"SavedLegacySettings" = "46 00 00 00 41 00 00 00 01 00 00 00 00 00 00 00"

[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"

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

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

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

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

"IntranetName" = "1"

Proxy settings are disabled:

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

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

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

The process kilf.exe:3980 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "44 50 58 17 37 31 ED A4 43 B4 4B B4 E8 C9 A0 D9"

[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 dasu.exe:1692 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "93 AE ED A6 DE B8 9F 44 26 AA 2E 27 08 EE 06 0D"

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

[HKCU\Software\Microsoft\Wyufhoefbiab]
"2h7af223" = "ggbUhRd1PpWf2Q==獹$"

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

The process %original file name%.exe:2856 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "1E C3 A3 A3 61 A1 6A 2A 30 88 9D C9 46 C2 A0 F1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f3-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"

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

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

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{773a730e-74fb-11e2-b597-000c293bdf2f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f2-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f5-7454-11e2-b4cd-806d6172696f}]
"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\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
"Personal" = "%Documents and Settings%\%current user%\My Documents"

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

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

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

"IntranetName" = "1"

The Trojan-PSW 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"

Dropped PE files

MD5	File path
4a7fd6ae85d964a883b38dd42f91d256	c:\Documents and Settings\"%CurrentUserName%"\Application Data\Hyaqe\dasu.exe
d611915ee96b7126f42bda5b05c7635e	c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\budha.exe
0154fecc492db496aa998636fc828e6d	c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temporary Internet Files\Content.IE5\OVYHJBCC\profile_main[1].exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

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

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

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

PFXImportCertStore

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

GetClipboardData
TranslateMessage

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

UnsealMessage
SealMessage
DeleteSecurityContext

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

WSAGetOverlappedResult
WSASend
recv
gethostbyname
WSARecv
send
closesocket
freeaddrinfo
getaddrinfo
GetAddrInfoW

The Trojan-PSW 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):

   budha.exe:3012
   kilf.exe:3980
   dasu.exe:1692
   %original file name%.exe:2856
   

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

   %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OVYHJBCC\profile_main[1].exe (1694 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\TarB3.tmp (2712 bytes)
   %Documents and Settings%\%current user%\Application Data\Microsoft\CryptnetUrlCache\MetaData\2BF68F4714092295550497DD56F57004 (408 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\CabB2.tmp (54 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\TarB5.tmp (2712 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\OVYHJBCC\desktop.ini (67 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\CabB4.tmp (54 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\kilf.exe (1694 bytes)
   %Documents and Settings%\%current user%\Application Data\Hyaqe\dasu.exe (2734 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\VOA7720.bat (171 bytes)
   %Documents and Settings%\%current user%\ntuser.dat.LOG (5592 bytes)
   %Documents and Settings%\%current user%\NTUSER.DAT (4788 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\budha.exe (21 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	4881	5120	4.31273	5bd78445669a0ae4a1cc746b58415314
.data	12288	6401	6656	2.50295	7d33a1ebe246d96662d74d4737d52af2
.idata	20480	2400	2560	3.76867	31c85b4df47dddf1d035a6ecf4a20157
.rsrc	24576	5252	5632	3.70321	f66a95fae4a4cfef8a00b2f6cd60d056

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 112
443ac8b40c16da3dddd8fde4e79583f4
ad282ed208a2d7f209250d9352c019cb
cf2ff9c9aa166241c71b70e9b273c2fa
6eeab38a66bdad7e74620b3bb7e2e2d4
ef00ebd83619981bb723ecca9e9bd12f
ca886b3281d6101221fa46fa1cbbafbb
b84c780fd81f8ed76232cdd373e6f1ce
a04291a2e50eb3b21f49e864abd24fa9
b1a14a3682ee83af0dfeb6de5e57493e
d034cb955d5030b4efbf73b0414e7f2e
d4cdcd1479acce93f3e6e90994693e39
d57df59ee627e452018a2494463fc41f
bcf6888054e2f379fbfd83d66a68c8a1
b45657e95311ab4a0d09d61049992c2f
d56ed696fa61b976f1666c2a25b29793
c0c0a9f37dae7bafc1eb553a096e319e
db494490e1b2fa67fc0355637e5ef4ba
cd2ca8db18fb5125d67945ba6d19eb21
c59c9e1e23b88998aaaab752e496ff6e
b3d7f2882f5bc72f551311a7969cb8f6
af30768ff92488278c8f34cb0950fed9
ac2471c932b5a12b630cf95f27012741
a7ad11374e88cc4684008773f353e24c
db60c5acc635f457069fc437704b7c14
d49b2a36223ac79149389ef726088a9a

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	72.247.8.51
robotvacuumhut.com	38.99.254.69

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

Cache-Control: max-age=10675

Date: Sat, 28 Jun 2014 08:11:43 GMT

Connection: keep-alive

X-CCC: CA

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..Cache-Control: max-age=10675..Date: Sat, 28 Jun 2014 08:11:43 GMT..Connection: keep-alive..X-CCC: CA..X-CID: 2..1401CF3DB40B609892..

Map

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

Strings from Dumps

Explorer.EXE_1948_rwx_023F0000_00048000:

.text

.text

`.data

`.data

.reloc

.reloc

Invalid parameter passed to C runtime function.

Invalid parameter passed to C runtime function.

)"4(7*</</pre><pre>!*< ?"4'</pre><pre>0123456789</pre><pre>userenv.dll</pre><pre>del "%s"</pre><pre>if exist "%s" goto d</pre><pre>del /F "%s"</pre><pre>http://www.google.com/</pre><pre>http://www.bing.com/</pre><pre>REPORT</pre><pre>gdiplus.dll</pre><pre>GdiplusShutdown</pre><pre>RegDeleteKeyExW</pre><pre>HTTP/1.1</pre><pre>m9.td</pre><pre>t.Ht$HHt</pre><pre>ntdll.dll</pre><pre>KERNEL32.dll</pre><pre>ExitWindowsEx</pre><pre>MsgWaitForMultipleObjects</pre><pre>GetKeyboardState</pre><pre>USER32.dll</pre><pre>CryptGetKeyParam</pre><pre>CryptImportKey</pre><pre>CryptDestroyKey</pre><pre>RegCreateKeyExW</pre><pre>RegCloseKey</pre><pre>RegQueryInfoKeyW</pre><pre>RegDeleteKeyW</pre><pre>RegOpenKeyExW</pre><pre>RegFlushKey</pre><pre>RegEnumKeyExW</pre><pre>ADVAPI32.dll</pre><pre>PathIsURLW</pre><pre>UrlUnescapeA</pre><pre>SHLWAPI.dll</pre><pre>ShellExecuteW</pre><pre>SHELL32.dll</pre><pre>Secur32.dll</pre><pre>ole32.dll</pre><pre>GDI32.dll</pre><pre>WS2_32.dll</pre><pre>PFXImportCertStore</pre><pre>CertDeleteCertificateFromStore</pre><pre>CertOpenSystemStoreW</pre><pre>CertCloseStore</pre><pre>CertEnumCertificatesInStore</pre><pre>CertDuplicateCertificateContext</pre><pre>PFXExportCertStoreEx</pre><pre>CRYPT32.dll</pre><pre>HttpSendRequestExA</pre><pre>HttpQueryInfoA</pre><pre>InternetCrackUrlA</pre><pre>HttpOpenRequestA</pre><pre>HttpEndRequestA</pre><pre>HttpAddRequestHeadersA</pre><pre>WININET.dll</pre><pre>OLEAUT32.dll</pre><pre>NETAPI32.dll</pre><pre>IPHLPAPI.DLL</pre><pre>VERSION.dll</pre><pre>msvcrt.dll</pre><pre>zcÁ</pre><pre>: :$:(:,:0:4:</pre><pre>7!7%7)7-7175797</pre><pre>4-5}5</pre><pre>:":(:3:9:</pre><pre>SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\%s</pre><pre>"%s" %s</pre><pre>/c "%s"</pre><pre>kernel32.dll</pre><pre>urlmon.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>shell32.dll</pre><pre>\StringFileInfo\xx\%s</pre><pre>cabinet.dll</pre><pre>Wadvapi32.dll</pre><pre>%Documents and Settings%\%current user%\Application Data</pre><pre>%Documents and Settings%\%current user%\Local Settings\Application Data</pre><pre>Global\{01E22063-0823-4088-6532-C4CE7D78E7DC}</pre>