Trojan-PSW.Win32.Zbot.4_e5ae32668a

by malwarelabrobot on July 13th, 2013 in Malware Descriptions.

HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.Win32.Zbot.dhnb (v) (VIPRE), Trojan-PWS.Win32.Zbot!IK (Emsisoft), Trojan-PSW.Win32.Zbot.4.FD, GenericInjector.YR (Lavasoft MAS)
Behaviour: Trojan-PSW, Trojan


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: e5ae32668a0109063b2a9e51ad03cbc1
SHA1: 711854c0624d23695b49dc191b7d2f8b007fd32e
SHA256: f4e8f326427e712e8af2dce07e6cd144d80dffba4175390f74e64271f6c7afce
SSDeep: 6144:K5xRAXYjNyhhv0y0tL8XaszVIML7uezJDWy1VK7ni:IxRLyUy0tQaeRDc7i
Size: 308224 bytes
File type: PE32
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2013-02-13 15:40:47


Summary:

Trojan-PSW. Trojan program intended for stealing users passwords.

Payload

No specific payload has been found.

Process activity

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

e5ae32668a0109063b2a9e51ad03cbc1.exe:628
erle.exe:1108

File activity

The process e5ae32668a0109063b2a9e51ad03cbc1.exe:628 makes changes in a file system.
The Trojan-PSW creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\tmp3f4306a4.bat (177 bytes)
%Documents and Settings%\%current user%\Application Data\Iwsok\erle.exe (308 bytes)

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

%Documents and Settings%\%current user%\Application Data\Iwsok\erle.exe (0 bytes)

Registry activity

The process e5ae32668a0109063b2a9e51ad03cbc1.exe:628 makes changes in a system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "3F F3 3A 92 CD 36 94 24 B5 EB 76 9F 18 5D A6 5C"

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

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

The process erle.exe:1108 makes changes in a system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "67 C1 46 7A FB 24 D2 22 5B E5 AE 65 4D E8 82 90"

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

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

[HKCU\Software\Microsoft\Taenr]
"1578c4gc" = "NMiIjDB7R8eb1gR8ZfXZ5w==."

Network activity (URLs)

URL IP Country
hxxp://www.google.com/ 74.125.226.212
hxxp://www.google.ca/ 74.125.226.223


Rootkit activity

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

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

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:

DecryptMessage
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


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):

    e5ae32668a0109063b2a9e51ad03cbc1.exe:628
    erle.exe:1108

  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\Temp\tmp3f4306a4.bat (177 bytes)
    %Documents and Settings%\%current user%\Application Data\Iwsok\erle.exe (308 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.