Analysis by: Henry Alarcon Jr.
 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

This Trojan may be dropped by other malware.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size: 69,632 bytes
File Type: DLL
Memory Resident: Yes
Initial Samples Received Date: 02 Sep 2019

Arrival Details

This Trojan may be dropped by other malware.

Other Details

This Trojan requires its main component to successfully perform its intended routine.

It does the following:

  • Its a DLL component used by other files to perform process hollowing.
  • It also requires the following components in order to perform its intended routine:
    • %User Temp%\Astrakhan.cab ← encrypted byte code
    • {Main component directory}\setup.dat

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.340.04
FIRST VSAPI PATTERN DATE: 02 Sep 2019
VSAPI OPR PATTERN File: 15.341.00
VSAPI OPR PATTERN Date: 03 Sep 2019

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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

Restart in Safe Mode

[ Learn More ]

Step 4

Scan your computer with your Trend Micro product to delete files detected as Trojan.Win32.INJECTOR.MU. 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 the following Trend Micro Support pages for more information:

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as Trojan.Win32.INJECTOR.MU. 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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