TROJ_RANSOM.BZR
VirTool:Win32/Injector.gen!BY (Microsoft); PWS-Zbot.gen.xj (McAfee); Trojan-Ransom.Win32.Birele.fth (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.7572030 (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
94,208 bytes
EXE
No
24 Jun 2012
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:
- %Windows%\qeijdsfhst.exe
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
gue8422asd
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
gue8422asd
UID = "{DB899445-1D23-4AF9-9544-7BD442CD8193}"
Dropping Routine
This Trojan drops the following files:
- %Windows%\qeijdsfhst.exe
- %Application Data%\qeijdsfhst.exe
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)
This report is generated via an automated analysis system.
SOLUTION
9.200
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
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
- gue8422asd
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\SOFTWARE\Microsoft\gue8422asd
- UID = "{DB899445-1D23-4AF9-9544-7BD442CD8193}"
Step 4
Search and delete these files
- %Windows%\qeijdsfhst.exe
- %Application Data%\qeijdsfhst.exe
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_RANSOM.BZR. 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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