TROJ_KRYPTIK.DOI
RDN/Generic Downloader.x!gc (McAfee); Trojan-Downloader.Win32.Dofoil.pwe (Kaspersky); Trojan.Win32.Generic.pak!cobra (Sunbelt)
Windows 2000, Windows XP, Windows Server 2003
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.
It deletes itself after execution.
TECHNICAL DETAILS
30,208 bytes
EXE
No
13 May 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.
Dropping Routine
This Trojan drops the following files:
- %Application Data%\ipatwbkn.exe
- %System Root%\2806bb4aeb84d49be7015be0d05a0d2c3712.txt
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}.143.107:8090/{random path}
- http://{BLOCKED}.229.162:8080/{random path}
- http://{BLOCKED}115.220:8080/{random path}
- http://{BLOCKED}.14.197:8080/{random path}
- http://{BLOCKED}.205.55:8080/{random path}
- http://{BLOCKED}.32.99:8080/{random path}
- http://{BLOCKED}115.219:8080/{random path}
- http://{BLOCKED}.128.254:8090/{random path}
It deletes itself after execution.
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
Search and delete these components
- %Application Data%\ipatwbkn.exe
- %System Root%\2806bb4aeb84d49be7015be0d05a0d2c3712.txt
Step 3
Scan your computer with your Trend Micro product to delete files detected as TROJ_KRYPTIK.DOI. 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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