TROJ_SKEEYAH.TDA
Trojan:Win32/Skeeyah.A!bit (Microsoft); RDN/Generic PWS.y (McAfee); Backdoor.Win32.DarkKomet.frsu (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse MSIL8.AXET (AVG)
Windows
![](/vinfo/imgFiles/legend.jpg)
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.
TECHNICAL DETAILS
678,912 bytes
EXE
No
03 Aug 2015
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 drops the following copies of itself into the affected system:
- %User Profile%\aEY1PcIrblpuiVWW\j8NiIK1LprBt.exe
- %User Profile%\aEY1PcIrblpuiVWW\orBkYFuzZi76.exe
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
It creates the following folders:
- %User Profile%\Application Data\aEY1PcIrblpuiVWW
- %User Profile%\Application Data\dclogs
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\Software\DC3_FEXEC
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Winlogon
Shell = "%User Profile%\aEY1PcIrblpuiVWW\j8NiIK1LprBt.exe,explorer.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Winlogon
Shell = "%User Profile%\aEY1PcIrblpuiVWW\orBkYFuzZi76.exe,explorer.exe"
HKEY_CURRENT_USER\Software\DC3_FEXEC
7/21/2015 at 7:04:29 PM = "{1c6961c0-f82d-11e0-a6bd-806d6172696f-1756172240}"
Other Details
This Trojan connects to the following possibly malicious URL:
- {BLOCKED}2.32.10
This report is generated via an automated analysis system.
SOLUTION
9.750
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
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_CURRENT_USER\Software
- DC3_FEXEC
Step 3
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 NT\CurrentVersion\Winlogon
- Shell = "%User Profile%\aEY1PcIrblpuiVWW\j8NiIK1LprBt.exe,explorer.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
- Shell = "%User Profile%\aEY1PcIrblpuiVWW\orBkYFuzZi76.exe,explorer.exe"
- In HKEY_CURRENT_USER\Software\DC3_FEXEC
- 7/21/2015 at 7:04:29 PM = "{1c6961c0-f82d-11e0-a6bd-806d6172696f-1756172240}"
Step 4
Search and delete these folders
- %User Profile%\Application Data\aEY1PcIrblpuiVWW
- %User Profile%\Application Data\dclogs
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_SKEEYAH.TDA. 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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