TROJ_YAKES.AE
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
As of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
36,864 bytes
EXE
Yes
15 Sep 2011
Downloads files
Arrival Details
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
Installation
This Trojan drops the following copies of itself into the affected system:
- %System Root%\Documents and Settings\All Users\Temp\{8 random characters}.com
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- andromeda
It stays resident in memory by creating the following process(es):
- svchost.exe
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
2600 = %System Root%\Documents and Settings\All Users\Temp\{8 random characters}.com
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
AA
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- http://{BLOCKED}cked.ru/and/stat3.php
- http://{BLOCKED}emikontara551.ru/and/stat3.php
As of this writing, the said sites are inaccessible.
SOLUTION
9.200
8.440.14
15 Sep 2011
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\Microsoft
- AA
- AA
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\policies\Explorer\Run
- 2600 = "%System Root%\Documents and Settings\All Users\Temp\{8 random characters}.com"
- 2600 = "%System Root%\Documents and Settings\All Users\Temp\{8 random characters}.com"
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_YAKES.AE. 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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