TSPY_ZBOT.HPI
PWS:Win32/Zbot (Microsoft); PWS-Zbot.gen.hz (McAfee); Trojan.Zbot (Symantec); PAK:UPX, Trojan-Spy.Win32.Zbot.cpzp (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan-Spy:W32/Zbot.AVQF (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
197,632 bytes
EXE
Yes
04 Dec 2011
Arrival Details
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This spyware creates the following folders:
- %User Profile%\Application Data\Jyjey
- %User Profile%\Application Data\Yvrut
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{58C4EBA0-47A8-AD40-8C85-A85A94978B48} = ""%User Profile%\Jyjey\atumu.exe""
It registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
Other System Modifications
This spyware adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Fuemma
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Privacy
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Fuemma
26ghbf9f = {random values}
HKEY_CURRENT_USER\Software\Microsoft\
Fuemma
21j07fbh = "Dg0J2w==_CHAR(0x0E)__CHAR(0x03)_"
HKEY_CURRENT_USER\Software\Microsoft\
Fuemma
21j07fbh = db9df
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DisableNotifications = 1
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
19609:UDP = "19609:UDP:*:Enabled:UDP 19609"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\GloballyOpenPorts\
List
15429:TCP = "15429:TCP:*:Enabled:TCP 15429"
HKEY_CURRENT_USER\Software\Microsoft\
Fuemma
564j0jd = {random values}
HKEY_CURRENT_USER\Software\Microsoft\
Fuemma
1de0i774 = {random values}
HKEY_CURRENT_USER\Software\Microsoft\
Fuemma
24hhecgh = {random values}
HKEY_CURRENT_USER\Software\Microsoft\
Fuemma
6fi816 = {random values}
HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager
Server ID = 4
HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4
FirstRun = 1
HKEY_CURRENT_USER\Software\Microsoft\
Fuemma
21j07fbh = db9d4f
HKEY_CURRENT_USER\Software\Microsoft\
Fuemma
21j07fbh = db9d47
It modifies the following registry entries:
HKEY_CURRENT_USER\Identities
Last Username = "Main Identity"
(Note: The default value data of the said registry entry is Main Identity.)
HKEY_CURRENT_USER\Identities
Last User ID = "{341F68BA-C841-4200-A7B4-3D5CFF202166}"
(Note: The default value data of the said registry entry is {5D1D9894-914A-4AF9-BD82-81F349A83013}.)
HKEY_CURRENT_USER\Identities
Identity Login = 9853
(Note: The default value data of the said registry entry is 98053.)
HKEY_CURRENT_USER\Identities
Identity Ordinal = 2
(Note: The default value data of the said registry entry is 1.)
Dropping Routine
This spyware drops the following files:
- %User Profile%\Jyjey\atumu.exe
- %User Profile%\Yvrut\jiymz.pie
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
Other Details
This spyware deletes the initially executed copy of itself
This report is generated via an automated analysis system.
SOLUTION
9.200
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Restart in Safe Mode
Step 3
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts
- List
- In HKEY_CURRENT_USER\Software\Microsoft
- Fuemma
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer
- Privacy
Step 4
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- {58C4EBA0-47A8-AD40-8C85-A85A94978B48}=""%User Profile%\Jyjey\atumu.exe""
- In HKEY_CURRENT_USER\Software\Microsoft\Fuemma
- 26ghbf9f={random values}
- In HKEY_CURRENT_USER\Software\Microsoft\Fuemma
- 21j07fbh="Dg0J2w==_CHAR(0x0E)__CHAR(0x03)_"
- In HKEY_CURRENT_USER\Software\Microsoft\Fuemma
- 21j07fbh=db9df
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
- DisableNotifications=1
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- 19609:UDP="19609:UDP:*:Enabled:UDP 19609"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\GloballyOpenPorts\List
- 15429:TCP="15429:TCP:*:Enabled:TCP 15429"
- In HKEY_CURRENT_USER\Software\Microsoft\Fuemma
- 564j0jd={random values}
- In HKEY_CURRENT_USER\Software\Microsoft\Fuemma
- 1de0i774={random values}
- In HKEY_CURRENT_USER\Software\Microsoft\Fuemma
- 24hhecgh={random values}
- In HKEY_CURRENT_USER\Software\Microsoft\Fuemma
- 6fi816={random values}
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager
- Server ID=4
- In HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
- FirstRun=1
- In HKEY_CURRENT_USER\Software\Microsoft\Fuemma
- 21j07fbh=db9d4f
- In HKEY_CURRENT_USER\Software\Microsoft\Fuemma
- 21j07fbh=db9d47
Step 5
Restore this modified registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Identities
- From: Last Username="Main Identity"
To: Last Username=Main Identity
- From: Last Username="Main Identity"
- In HKEY_CURRENT_USER\Identities
- From: Last User ID="{341F68BA-C841-4200-A7B4-3D5CFF202166}"
To: Last User ID={5D1D9894-914A-4AF9-BD82-81F349A83013}
- From: Last User ID="{341F68BA-C841-4200-A7B4-3D5CFF202166}"
- In HKEY_CURRENT_USER\Identities
- From: Identity Login=9853
To: Identity Login=98053
- From: Identity Login=9853
- In HKEY_CURRENT_USER\Identities
- From: Identity Ordinal=2
To: Identity Ordinal=1
- From: Identity Ordinal=2
Step 6
Search and delete these folders
- %User Profile%\Application Data\Jyjey
- %User Profile%\Application Data\Yvrut
Step 7
Search and delete these files
- %User Profile%\Jyjey\atumu.exe
- %User Profile%\Yvrut\jiymz.pie
Step 8
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_ZBOT.HPI. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
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