TROJ_AGENT.AKSC
Trojan:Win32/Bumat!rts (Microsoft); Generic.dx (McAfee); Backdoor.Paproxy (Symantec); Trojan.Win32.Generic.pak!cobra (Sunbelt); GenPack:Generic.Malware.SLBwg.2E97C42C (FSecure)
Windows 2000, Windows XP, Windows Server 2003
![](/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
124,928 bytes
EXE
No
01 Jan 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:
- %System%\drv32dta
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\InitRegKey\mod
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\InitRegKey\Proxy
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\InitRegKey\mod
jpeg = "1"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\InitRegKey\mod
click = "1"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\InitRegKey\mod
fake = "1"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\InitRegKey\mod
inject = "1"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\InitRegKey\Proxy
https = " 31441"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\InitRegKey\Proxy
server = " 22585"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\InitRegKey\Proxy
telnet = " 9149"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\InitRegKey\Proxy
ftp = " 33257"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\InitRegKey\Proxy
socks = " 21934"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\InitRegKey\Proxy
remote = " 60700"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\InitRegKey\Proxy
smtp = " 15989"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
ShowSuperHidden = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Explorer\Run
{malware file name} = "%System Root%\{malware file name}.exe"
It modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
Hidden = "2"
(Note: The default value data of the said registry entry is 2.)
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
SuperHidden = "0"
Dropping Routine
This Trojan drops the following files:
- %System%\drv32dta\pstore_121210_130617.txt
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
Other Details
This Trojan connects to the following possibly malicious URL:
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
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\Control\InitRegKey
- mod
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\InitRegKey
- Proxy
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_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\InitRegKey\mod
- jpeg = "1"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\InitRegKey\mod
- click = "1"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\InitRegKey\mod
- fake = "1"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\InitRegKey\mod
- inject = "1"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\InitRegKey\Proxy
- https = " 31441"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\InitRegKey\Proxy
- server = " 22585"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\InitRegKey\Proxy
- telnet = " 9149"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\InitRegKey\Proxy
- ftp = " 33257"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\InitRegKey\Proxy
- socks = " 21934"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\InitRegKey\Proxy
- remote = " 60700"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\InitRegKey\Proxy
- smtp = " 15989"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
- ShowSuperHidden = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run
- {malware file name} = "%System Root%\{malware file name}.exe"
Step 4
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
- From: Hidden = "2"
To: Hidden = ""2""
- From: Hidden = "2"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
- SuperHidden = "0"
Step 5
Search and delete this file
- %System%\drv32dta\pstore_121210_130617.txt
Step 6
Search and delete this folder
- %System%\drv32dta
Step 7
Scan your computer with your Trend Micro product to delete files detected as TROJ_AGENT.AKSC. 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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