TSPY_RULEDOR.C
Backdoor:Win32/Ruledor.B (Microsoft); Clearsearch.dldr. (McAfee); Backdoor.Win32.Ruledor.c (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Backdoor.Generic.184797 (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.
TECHNICAL DETAILS
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 drops the following copies of itself into the affected system:
- %Program Files%\ClearSearch\Loader.exe
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)
It creates the following folders:
- ClrSch
- %Program Files%\ClearSearch
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
ClrSchLoader = "%Program Files%\ClearSearch\Loader.exe"
Other System Modifications
This spyware deletes the following files:
- .
- ..
It adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch
guid = "{307696C6-8FF5-483d-A4E7-58806FD58C67}"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch
promo = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
version = "3"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fb7c36"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd393"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd394"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd395"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd396"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd397"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd398"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd399"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd39a"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd39b"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd39c"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd39d"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd39e"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd39f"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3a"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3a1"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3a2"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3a3"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3a4"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3a5"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3a6"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3a7"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3a8"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3a9"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3aa"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3ab"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3ac"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3ad"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3ae"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3af"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3b"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3b1"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3b2"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3b3"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3b4"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3b5"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3b6"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3b7"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3b8"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3b9"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3ba"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3bb"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3bc"
HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\
Loader
nextupdate = "4fcd3bd"
Dropping Routine
This spyware drops the following files:
- \t78.
Other Details
This spyware connects to the following possibly malicious URL:
- http://sds.{BLOCKED}h.com/ie/control.dat
- http://status.{BLOCKED}h.com/loader/?{random characters}
- http://status.{BLOCKED}h.com/loader/ping/?{random characters}
This report is generated via an automated analysis system.
SOLUTION
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\SOFTWARE
- ClrSch
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch
- Loader
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer
- Browser Helper Objects
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- ClrSchLoader = "%Program Files%\ClearSearch\Loader.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch
- guid = "{307696C6-8FF5-483d-A4E7-58806FD58C67}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch
- promo = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- version = "3"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fb7c36"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd393"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd394"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd395"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd396"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd397"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd398"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd399"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd39a"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd39b"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd39c"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd39d"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd39e"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd39f"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3a"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3a1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3a2"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3a3"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3a4"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3a5"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3a6"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3a7"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3a8"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3a9"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3aa"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3ab"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3ac"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3ad"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3ae"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3af"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3b"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3b1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3b2"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3b3"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3b4"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3b5"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3b6"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3b7"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3b8"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3b9"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3ba"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3bb"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3bc"
- In HKEY_LOCAL_MACHINE\SOFTWARE\ClrSch\Loader
- nextupdate = "4fcd3bd"
Step 5
Search and delete this file
- \t78.
Step 6
Search and delete these folders
- ClrSch
- %Program Files%\ClearSearch
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_RULEDOR.C. 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.
Step 8
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
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