Trojan-PSW.Win32.Zbot.4_058446f3f6

by malwarelabrobot on August 26th, 2013 in Malware Descriptions.

Trojan.Win32.Inject.gbfq (Kaspersky), Trojan.Win32.Generic!SB.0 (VIPRE), Trojan.Win32.Inject!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: 058446f3f6c924e7c3abd468af8fd239
SHA1: 9a3c7b4a70058d989f444d467da9a695152ab071
SHA256: bc1cfe5e9e0e8814cda46309e5452ea791409a3ef1164f9e7c548c3fb5bad66e
SSDeep: 6144:zS3cqUmUVlwjCQUB1UsPFXY9ATo5D47DQGCT4Nd5TPuFP0u:zKcplu5W1fPFXHTF7DQDaBuau
Size: 312832 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2013-06-16 14:22:34


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):

058446f3f6c924e7c3abd468af8fd239.exe:2580
igybte.exe:2848

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

ctfmon.exe:252

File activity

The process 058446f3f6c924e7c3abd468af8fd239.exe:2580 makes changes in a file system.
The Trojan-PSW creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\Ahenwe\igybte.exe (1737 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\HIEA702.bat (173 bytes)

The process igybte.exe:2848 makes changes in a file system.
The Trojan-PSW creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\ntuser.dat.LOG (2208 bytes)
%Documents and Settings%\%current user%\NTUSER.DAT (540 bytes)

The process ctfmon.exe:252 makes changes in a file system.
The Trojan-PSW creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\ntuser.dat.LOG (5400 bytes)
%Documents and Settings%\%current user%\NTUSER.DAT (4484 bytes)

Registry activity

The process 058446f3f6c924e7c3abd468af8fd239.exe:2580 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" = "DB 7D 8A C4 88 0D 59 78 FE 14 1E 2D 29 72 32 B3"

[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 igybte.exe:2848 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" = "73 FD 71 94 1A A8 51 7F 20 92 21 97 93 3E 29 E2"

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

[HKCU\Software\Microsoft\Roycdiachy]
"32ee7e1j" = "sjsf1MZkAFaLeLYfF34tJA==y"

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

The process ctfmon.exe:252 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" = "B2 E3 72 9D 55 97 77 DF 10 51 AB 62 4E EB 49 4F"

[HKCU\Identities]
"Last User ID" = "{6855BFC2-9E4A-4896-A11D-74388FBABDC2}"

[HKCU\Identities]
"Last Username" = "Main Identity"

[HKCU\Software\Microsoft\Roycdiachy]
"36b29149" = "90 3B 77 D4"

[HKCU\Software\Microsoft\WAB\WAB4]
"OlkFolderRefresh" = "0"

[HKCU\Software\Microsoft\WAB\WAB4]
"FirstRun" = "1"

[HKCU\Identities]
"Identity Login" = "622675"

[HKCU\Software\Microsoft\Internet Account Manager]
"Server ID" = "4"

[HKCU\Identities]
"Identity Ordinal" = "2"

[HKCU\Software\Microsoft\WAB\WAB4]
"OlkContactRefresh" = "0"

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

[HKCU\Identities]
"Changing"

[HKCU\Identities]
"OutgoingID"

[HKCU\Identities]
"IncomingID"

The Trojan-PSW disables automatic startup of the application by deleting the following autorun value:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"internat.exe"

Network activity (URLs)

No activity has 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


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):

    058446f3f6c924e7c3abd468af8fd239.exe:2580
    igybte.exe:2848

  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%\Application Data\Ahenwe\igybte.exe (1737 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\HIEA702.bat (173 bytes)
    %Documents and Settings%\%current user%\ntuser.dat.LOG (2208 bytes)
    %Documents and Settings%\%current user%\NTUSER.DAT (540 bytes)

  5. Reboot the computer.

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