Threat Outbreak Alert RuleID23684: Email Messages Distributing Malicious Software on June 30, 2016

2016-07-01T12:09:01
ID CISCO-THREAT-46955
Type ciscothreats
Reporter Cisco
Modified 2016-07-01T12:09:01

Description

Medium

Alert ID:

46955

First Published:

2016 July 1 12:09 GMT

Version:

1

Summary

  • Cisco Security has detected significant activity related to spam email messages distributing malicious software.

Email messages that are related to this threat (RuleID23684) may contain the following files:

Name | Size in Bytes | MD5 Checksum
---|---|---
{08345893-8664-3347-5465-377674308801}.scr | 78,336
| 0xCE426750E414F5209BE5632263219FC8

The following text is a sample of the email message that is associated with this threat outbreak:

> Subject: **[CyberIntel Confidential] Odd Folder and Files on a Fileshare

**Message Body:

Ray,
Exactly what had me suspicious. I just got the *.scr file…attached….
please exercise caution.
Submitting to Symantec for analysis and others…
because of happy fingers…I hit reanalyze…
I don’t have the exact variant yet.
Before my happy fingers hit the button, I saw 1/53 pop up on upload.
Nathan,
I see what you did on calling the CLSID and we found through some
other Google searching that it was the RemoteApp and Desktop Connections CLSID
The full property of the shortcuts indicates that cmd.exe is being executed.
Cmd.exe is calling the hidden $RECYCLE.BIN{CLSID}\{what we believe is filename}.scr
& then it executes explorer against another specially-named file.

Cisco security appliances can help protect customers during the critical period between the first exploit of a virus outbreak and the release of vendor antivirus signatures. Cisco Web Security Appliances help secure and control web and email traffic by offering layers of malware protection. Cisco security appliances are automatically updated to help prevent both spam email and hostile web URLs from being passed to the end user.

Related Links
Cisco Security
Cisco SenderBase Security Network

Revision History

  • Version | Description | Section | Date
    ---|---|---|---
    1 | Initial Release | | 2016-July-01 12:09 GMT
    Show Less

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