TROJ_RANSOM.EQO
Backdoor:Win32/Delf.LB (Microsoft); BackDoor-FJR (McAfee); Trojan.Gen (Symantec); Trojan-Ransom.Win32.Birele.agel (Kaspersky); Trojan.Win32.Redosdru.C (v) (Sunbelt); Trojan horse Generic30.ABDL.dropper (AVG)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan 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 itself after execution.
TECHNICAL DETAILS
176,273 bytes
EXE
Yes
02 May 2013
Arrival Details
This Trojan 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 Trojan creates the following folders:
- %Windows%\LocalUser
(Note: %Windows% is the Windows folder, which is usually C:\Windows.)
Autostart Technique
This Trojan 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\360svc\Parameters
Other System Modifications
This Trojan adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\360svc
Description = "win Agent ww12234567"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\360svc\Parameters
ServiceDll = "%Windows%\LocalUser\85f8kill.dll"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\360svc\Parameters
ServiceMain = "LovetooGood"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\360svc
InstallModule = "{malware path and file name}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\360svc
Type = "12"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SvcHost
netsvcs = "{random characters}"
(Note: The default value data of the said registry entry is {random values}.)
Dropping Routine
This Trojan drops the following files:
- %Windows%\LocalUser\85f8kill.dll
(Note: %Windows% is the Windows folder, which is usually C:\Windows.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://luoxue.{BLOCKED}0.com/121a13.html
It deletes itself after execution.
This report is generated via an automated analysis system.
SOLUTION
9.300
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
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\360svc
- Parameters
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\SYSTEM\ControlSet001\Services\360svc
- Description = "win Agent ww12234567"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\360svc\Parameters
- ServiceDll = "%Windows%\LocalUser\85f8kill.dll"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\360svc\Parameters
- ServiceMain = "LovetooGood"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\360svc
- InstallModule = "{malware path and file name}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\360svc
- Type = "12"
Step 5
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost
- From: netsvcs = "{random characters}"
To: netsvcs = ""{random values}""
- From: netsvcs = "{random characters}"
Step 6
Search and delete this file
- %Windows%\LocalUser\85f8kill.dll
Step 7
Search and delete this folder
- %Windows%\LocalUser
Step 8
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_RANSOM.EQO. 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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