Skip to main content

TrojanPSW.Win32.Zbot.4_90f544b72b


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

The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

Summary

MD5: 90f544b72b60e3bdd656163b8d0676a9

SHA1: cf0553b8ff2a7bd7dd8334058142433d3ba6a957

SHA256: 13cb964f3a69edbfcf40a4df5737bea6b065e2ae008a0440760684ba2b350af3

SSDeep: 6144:N0NeH4vkN71ZZvp9k0ervKPI6zwsH 7aTmulKwPpk8v:N0NeH4kZZvp9SKgIH OTm0Thkw

Size: 303616 bytes

File type: PE32

Platform: WIN32

Entropy: Packed

PEID: UPolyXv05_v6

Company: AirInstaller Inc.

Created at: 2003-11-14 01:15:40

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

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

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

90f544b72b60e3bdd656163b8d0676a9.exe:1580
ciidg.exe:1172

File activity

The process 90f544b72b60e3bdd656163b8d0676a9.exe:1580 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\Xelyak\ciidg.exe (1728 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\FRR57A2.bat (173 bytes)

The process ciidg.exe:1172 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 (7080 bytes)
%Documents and Settings%\%current user%\NTUSER.DAT (5660 bytes)

Registry activity

The process 90f544b72b60e3bdd656163b8d0676a9.exe:1580 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" = "EE 30 44 2E FF 8B 04 8B C6 5C 15 88 E1 C2 57 9F"

[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 ciidg.exe:1172 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" = "86 2C 71 0B BF 21 26 15 B9 F2 A4 92 9A C5 95 21"

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

[HKCU\Software\Microsoft\Ususlihaabr]
"1e0hh858" = "TSfxjMzTHccVfRbcÇŽ"

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

Network activity (URLs)

URL IP
hxxp://www.google.com/173.194.43.16
hxxp://www.google.ca/?gws_rd=cr173.194.43.31


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

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):

    90f544b72b60e3bdd656163b8d0676a9.exe:1580
    ciidg.exe:1172

  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\Xelyak\ciidg.exe (1728 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\FRR57A2.bat (173 bytes)
    %Documents and Settings%\%current user%\NTUSER.DAT.LOG (7080 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

Network Activity

Map

Strings from Dumps