Analysis by: Michael Jay Villanueva
 Modified by: Jennifer Gumban
ALIASES:

Exploit:SWF/Broxwek.A (Microsoft)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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

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 may be hosted on a website and run when a user accesses the said website. However, as of this writing, the said sites are inaccessible.

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

  TECHNICAL DETAILS

File Size: 52,582 bytes
File Type: SWF
Memory Resident: No
Initial Samples Received Date: 03 Nov 2016

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.

It may be hosted on a website and run when a user accesses the said website.

It may be downloaded from the following remote site(s):

  • {BLOCKED}.{BLOCKED}.114.242 using random domains and paths such as the ff:
    • http://u67ha.{BLOCKED}lothing.gq/index.php?xXqKd7CbLhjJCIQ=l3SMfPrfJxzFGMSUb-nJDa9GPkXCRQLPh4SGhK_ZE4Cvfj6-0LKUDRn66QOTFALOpqxveN0MaFT_zR3AaQ4ilotXQB5MrPzwnEqWwxWeioWK_UTbMg1C_cCUQbltiQzzzLBGd8sjxBTX6TdTz7seVUgbogAQlryJQ-DbpgN6V0ggEkqfPZVlqx7IQnmtayh42P2zRTlykKM
    • http://dvltf6.{BLOCKED}s.top/index.php?w3aKdriUJRjGD4s=l3SMfPrfJxzFGMSUb-nJDa9GPkXCRQLPh4SGhK_ZE4Cvfj6-0LKUDRn66QOTFALOpqxveN0MaFT_zR3AaQ4ilotXQB5MrPzwnEqWwxWeioXXrhWNZw8Q98TGRrcz3FTwzbRFIc4kwUPRvWRZmeNPVEgbogAQlryJQ-DbpgN6V0ggEkqfPZVlqx7IQnmtayh42P2yRTtwkKM
    • http://fwef.{BLOCKED}body.tk/index.php?xH6Af7iVKhbNCoE=l3SMfPrfJxzFGMSUb-nJDa9GPkXCRQLPh4SGhK_ZE4Cvfj6-0LKUDRn66QOTFALOpqxveN0MaFT_zR3AaQ4ilotXQB5MrPzwnEqWwxWeioWCqRPYNV9F-5DHR-M82Vyjz7Ycd5pzkhWD6WJSyexLBEgbogAQlryJQ-DbpgN6V0ggEkqfPZVlqx7IQnmtayh42P2yQD5ykKM
    • http://a9bml.{BLOCKED}m4q.top/index.php?w3aKdriVKB_LCYU=l3SMfPrfJxzFGMSUb-nJDa9GPkXCRQLPh4SGhK_ZE4Cvfj6-0LKUDRn66QOTFALOpqxveN0MaFT_zR3AaQ4ilotXQB5MrPzwnEqWwxWeioWArxaKYgMW98aVFbdt3FqknuRAdph2lhHQ6WZWmOtJVUgbogAQlryJQ-DbpgN6V0ggEkqfPZVlqx7IQnmtayh42P2zRTt8kKM
    • http://cifma.{BLOCKED}h.top/index.php?xH2AcrebLhfHA4E=l3SMfPrfJxzFGMSUb-nJDa9GPkXCRQLPh4SGhK_ZE4Cvfj6-0LKUDRn66QOTFALOpqxveN0MaFT_zR3AaQ4ilotXQB5MrPzwnEqWwxWeioWHrkTcN15FqZqRRrM83Vj8mrZFds4nkhDX6zBVmuMaVkgbogAQlryJQ-DbpgN6V0ggEkqfPZVlqx7IQnmtayh42P26Qzx2kKM
  • {BLOCKED}.{BLOCKED}.36.129 (compromised website)

However, as of this writing, the said sites are inaccessible.

Other Details

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

  SOLUTION

Minimum Scan Engine: 9.8
FIRST VSAPI PATTERN FILE: 12.874.08
FIRST VSAPI PATTERN DATE: 02 Nov 2016
VSAPI OPR PATTERN File: 12.875.00
VSAPI OPR PATTERN Date: 03 Nov 2016

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

Close all opened browser windows

Step 3

Scan your computer with your Trend Micro product to delete files detected as SWF_RIGEK.LLQ. 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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