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Tag: Macro

[SANS ISC] How Attackers Brush Up Their Malicious Scripts

November 9, 2020 SANS Internet Storm Center, Security Leave a comment

I published the following diary on isc.sans.edu: “How Attackers Brush Up Their Malicious Scripts“: On Friday, I received a bunch of alerts from one of my YARA hunting rules. Several samples were submitted from the same account (through the VT API), from the same country (US), and in a very

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[SANS ISC] A Mix of Python & VBA in a Malicious Word Document

September 18, 2020 Malware, SANS Internet Storm Center, Security One comment

I published the following diary on isc.sans.edu: “A Mix of Python & VBA in a Malicious Word Document“: A few days ago, Didier wrote an interesting diary about embedded objects into an Office document. I had a discussion about an interesting OLE file that I found. Because it used the same

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[SANS ISC] Malicious Excel Sheet with a NULL VT Score

August 26, 2020 Malware, SANS Internet Storm Center, Security One comment

I published the following diary on isc.sans.edu: “Malicious Excel Sheet with a NULL VT Score“: Just a quick diary today to demonstrate, once again, that relying only on a classic antivirus solution is not sufficient in 2020. I found a sample that just has a very nice score of 0/57 on VT. Yes, according to

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SANS ISC

[SANS ISC] A Safe Excel Sheet Not So Safe

March 6, 2020 Malware, SANS Internet Storm Center, Security 2 comments

I published the following diary on isc.sans.edu: “A Safe Excel Sheet Not So Safe“: I discovered a nice sample yesterday. This excel sheet was found in a mail flagged as “suspicious” by a security appliance. The recipient asked to release the mail from the quarantine because “it was sent from

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SANS ISC

[SANS ISC] Antivirus Evasion? Easy as 1,2,3

May 25, 2018 Malware, SANS Internet Storm Center One comment

I published the following diary on isc.sans.org: “Antivirus Evasion? Easy as 1,2,3“: For a while, ISC handlers have demonstrated several obfuscation techniques via our diaries. We always told you that attackers are trying to find new techniques to hide their content to not be flagged as malicious by antivirus products.

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SANS ISC

[SANS ISC] Microsoft Office VBA Macro Obfuscation via Metadata

December 16, 2017 Malware, Security 2 comments

I published the following diary on isc.sans.org: “Microsoft Office VBA Macro Obfuscation via Metadata“: Often, malicious macros make use of the same functions to infect the victim’s computer. If a macro contains these strings, it can be flagged as malicious or, at least, considered as suspicious. Some examples of suspicious functions

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SANS ISC

[SANS ISC] Base64 All The Things!

October 9, 2017 Malware, SANS Internet Storm Center, Security One comment

I published the following diary on isc.sans.org: “Base64 All The Things!“. Here is an interesting maldoc sample captured with my spam trap. The attached file is “PO# 36-14673.DOC” and has a score of 6 on VT. The file contains Open XML data that refers to an invoice.. [Read more]

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SANS ISC

[SANS ISC Diary] Another Day, Another Malicious Behaviour

September 30, 2016 Malware, SANS Internet Storm Center, Security 9 comments

I published the following diary on isc.sans.org: “Another Day, Another Malicious Behaviour“. Every day, we are spammed with thousands of malicious emails and attackers always try to find new ways to bypass the security controls. Yesterday, I detected a suspicious HTTP GET request: … [Read more]

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Deobfuscating Malicious VBA Macro with a Few Lines of Python

May 8, 2015 Malware, Security 23 comments

Just a quick post about a problem that security analysts are facing daily… For a while, malicious Office documents are delivered with OLE objects containing VBA macros. Bad guys are always using obfuscation techniques to make the analysis more difficult and (try to) bypass basic filters. This makes the analysis

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Malicious MS Word Document not Detected by AV Software

April 7, 2015 Malware, Security 12 comments

[This blogpost has also been published as a guest diary on isc.sans.org] Like everybody, I’m receiving a lot of spam everyday but… I like it! All unsocilited received messages are stored in a dedicated folder for two purposes: An automatic processing via my tool mime2vt A manual review at regular interval

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  • [/dev/random] [SANS ISC] Powershell Dropping a REvil Ransomware blog.rootshell.be/2021/01/21/s…

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    Yesterday at 19:45

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    January 19, 2021 10:55

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Time Machine

RSS NVD Vulnerabilities Feed

  • CVE-2020-16045 (chrome) January 14, 2021
    Use after Free in Payments in Google Chrome on Android prior to 87.0.4280.66 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.
  • CVE-2020-16046 (chrome) January 14, 2021
    Script injection in iOSWeb in Google Chrome on iOS prior to 84.0.4147.105 allowed a remote attacker to execute arbitrary code via a crafted HTML page.
  • CVE-2021-22132 (elasticsearch) January 14, 2021
    Elasticsearch versions 7.7.0 to 7.10.1 contain an information disclosure flaw in the async search API. Users who execute an async search will improperly store the HTTP headers. An Elasticsearch user with the ability to read the .tasks index could obtain sensitive request headers of other users in the cluster. This issue is fixed in Elasticsearch […]
  • CVE-2020-29018 (fortiweb) January 14, 2021
    A format string vulnerability in FortiWeb 6.3.0 through 6.3.5 may allow an authenticated, remote attacker to read the content of memory and retrieve sensitive data via the redir parameter.
  • CVE-2020-29019 (fortiweb) January 14, 2021
    A stack-based buffer overflow vulnerability in FortiWeb 6.3.0 through 6.3.7 and version before 6.2.4 may allow a remote, unauthenticated attacker to crash the httpd daemon thread by sending a request with a crafted cookie header.
  • CVE-2020-29017 (fortideceptor) January 14, 2021
    An OS command injection vulnerability in FortiDeceptor 3.1.0, 3.0.1, 3.0.0 may allow a remote authenticated attacker to execute arbitrary commands on the system by exploiting a command injection vulnerability on the Customization page.
  • CVE-2020-29016 (fortiweb) January 14, 2021
    A stack-based buffer overflow vulnerability in FortiWeb 6.3.0 through 6.3.5 and version before 6.2.4 may allow an unauthenticated, remote attacker to overwrite the content of the stack and potentially execute arbitrary code by sending a crafted request with a large certname.
  • CVE-2020-26733 (gn542vf_firmware) January 14, 2021
    Cross Site Scripting (XSS) in Configuration page in SKYWORTH GN542VF Hardware Version 2.0 and Software Version 2.0.0.16 allows authenticated attacker to inject their own script into the page via DDNS Configuration Section.
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