BKDR_QBOT.DHC
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This backdoor 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
Arrival Details
This backdoor 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 backdoor drops the following files:
- %Windows%\Tasks\{random}.job
(Note: %Windows% is the Windows folder, which is usually C:\Windows.)
It drops the following copies of itself into the affected system:
- %User Profile%\Application Data\Microsoft\{random}\{random}.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\Microsoft\{random}
(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 Details
This backdoor connects to the following possibly malicious URL:
- {BLOCKED}auskmt.pw
- {BLOCKED}theusas.org
- {BLOCKED}cmasn.net
- {BLOCKED}skdfasjdmtf.org
- {BLOCKED}psgrn.com
- {BLOCKED}tmaksjdo.net
- {BLOCKED}aqmi.net
- {BLOCKED}akyat.org
- {BLOCKED}hatdfsaf.net
- {BLOCKED}geyaihudmn.org
- {BLOCKED}ukahdmansgip.org
- {BLOCKED}fdnaetra.net
- http://{BLOCKED}oasset.{BLOCKED}ite.net/Repository/CampaignCreative/Campaign_16474/INSTREAMAD/KRWT0565H_Chili_Pot_Non-New.flv
- {BLOCKED}.{BLOCKED}.135.19:8080
- ajax.{BLOCKED}izzade.com
SOLUTION
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
Scan your computer with your Trend Micro product and note files detected as BKDR_QBOT.DHC
Step 3
Restart in Safe Mode
Step 4
Search and delete this folder
- %User Profile%\Application Data\Microsoft\{random}
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_QBOT.DHC. 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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