Threat Outbreak Alert: Fake Bank Deposit Confirmation Email Messages on September 11, 2013

2013-06-24T20:55:48
ID CISCO-THREAT-29759
Type ciscothreats
Reporter Cisco
Modified 2013-09-12T15:16:46

Description

Medium

Alert ID:

29759

First Published:

2013 June 24 20:55 GMT

Last Updated:

2013 September 12 15:16 GMT

Version:

4

Summary

  • Cisco Security has detected significant activity related to Portuguese-language spam email messages that claim to contain a bank deposit confirmation notice for the recipient. The text in the email message attempts to convince the recipient to open the link and view the details. However, the link redirects to a .zip file containing a malicious .cpl file that, when executed, attempts to infect the system with malicious code.

Email messages that are related to this threat (RuleID6349 and RuleID6349KVR) may contain the following files:

> Visualizar_Deposito.zip
Visualizar_Deposito.cpl

deposito_nfe29381.zip
deposito_nfe29381.exe

DepositoDPVAT.zip
DepositoDPVAT.cpl

The Visualizar_Deposito.cpl file in the Visualizar_Deposito.zip archive has a file size of 75,264 bytes. The MD5 checksum, which is a unique identifier of the executable, is the following string: 0x91436A43EBA39C48C2FE900488A3A301

The deposito_nfe29381.exe file in the deposito_nfe29381.zip attachment has a file size of 702,976 bytes. The MD5 checksum is the following string: 0xD0FA33209D92A95B9A32E4E3402F5D88

A variant of the deposito_nfe29381.exe file in the deposito_nfe29381.zip attachment has a file size of 1,126,400 bytes. The MD5 checksum is the following string: 0x8F31DA37E3677A4C8AE1F89576C3E283

A third variant of the deposito_nfe29381.exe file in the deposito_nfe29381.zip attachment has a file size of 1,683,426 bytes. The MD5 checksum is the following string: 0x943A068B043CE56DAF7B5FA085E93CA5

The DepositoDPVAT.cpl file in the DepositoDPVAT.zip attachment has a file size of 376,832 bytes. The MD5 checksum is the following string: 0x19DEB325503AC37DF284112A5B11041C

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

> Subject: WW Enc: Depósito Confirmado domingo, 23 de junho de 2013

Message Body:

Bom Dia
O deposito foi confirmado conforme solicitado.
Grato
Roberth Carvalho Pelarie (Dpto.Financeiro)
1 anexos | comprovante.PDF ( 162 Kb )[

Or

> Subject: ENC: Comprovante da transferência para sua conta 24/06/2013 21:52:41 9,908601E-02 ()

Message Body:

Bom dia!!
Segue anexo com o comprovante de depósito referente a nota de entrega 29381
deposito_nfe29381
Att,
Ari Carvalho

Cisco Security analysts examine real-world email traffic data that is collected from over 100,000 contributing organizations worldwide. This data helps provide a range of information about and analysis of global email security threats and trends. Cisco will continue to monitor this threat and automatically adapt systems to protect customers. This report will be updated if there are significant changes or if the risk to end users increases.

Cisco security appliances protect customers during the critical period between the first exploit of a virus outbreak and the release of vendor antivirus signatures. Email that is managed by Cisco and end users who are protected by Cisco Web Security Appliances will not be impacted by these attacks. Cisco security appliances are automatically updated to 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
    ---|---|---|---
    4 | Cisco Security has detected significant activity on September 11, 2013. | | 2013-September-12 15:16 GMT
    3 | Cisco Security has detected significant activity on July 10, 2013. | | 2013-July-10 13:41 GMT
    2 | Cisco Security has detected significant activity on June 25, 2013. | | 2013-June-25 16:42 GMT
    1 | Cisco Security has detected significant activity on June 23, 2013. | | 2013-June-24 20:55 GMT
    Show Less

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