TROJ_KORPODE.A
HEUR:Trojan.Win32.RockRat.gen (Kaspersky); Trojan:Win32/Korpode.A (Microsoft); Gen:Variant.Johnnie.87661 (BitDefender)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: No
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 executes then deletes itself afterward.
It steals certain information from the system and/or the user.
It connects to certain websites to send and receive information.
TECHNICAL DETAILS
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 files:
- {8 hex characters}.tmp -> screenshot of the affected system
- {Random Number}.dat -> (deleted afterwards)
It adds the following processes:
- wscript.exe
- cmd.exe /C ping 0.1.1.2 -n 1 -w 4000 > nul & del "{Folder Location of Malware}\{Malware Name}.exe"
- %System%\PING.EXE ping 0.1.1.2 -n 1 -w 4000
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It executes then deletes itself afterward.
It injects codes into the following process(es):
- wscript.exe (added process)
Information Theft
This Trojan steals the following information:
- Machine Type
- Screenshot of the Affected System
- Stored usernames and passwords from the following web browsers:
- Internet Explorer
- Chrome
- Firefox
Other Details
This Trojan connects to the following website to send and receive information:
- https://{BLOCKED}i.{BLOCKED}d.com
- https://{BLOCKED}i.{BLOCKED}x.com
- https://{BLOCKED}i.{BLOCKED}xapi.com
- https://{BLOCKED}i.{BLOCKED}x.net
It does the following:
- It queries the following registry to determine if it is being run in a vm or sandbox:
- HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System
- SystemBiosVersion
- SystemBiosVersion
- HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System
It checks if the following virtual machine or sandbox related module(s) is loaded in the affected system:
- SbieDll.dll
- Dbghelp.dll
- Api_log.dll
- Dir_watch.dll
It checks if the following virtual machine or sandbox related folder(s) or file(s) is present in the affected system:
- C:\Program Files\VMware\VMware Tools\vmtoolsd.exe
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
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Search and delete these files
- {8 hex characters}.tmp
- {Random Number}.dat
Step 4
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_KORPODE.A. 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.
Did this description help? Tell us how we did.