t1566 | LoFP

t1566

Title	Tags
all kind of software downloads	t1203 t1204 t1204.002 t1566 sigma
all kinds of software downloads	t1203 t1204 t1204.002 t1566 sigma
an anti-phishing policy may be deleted by a system or network administrator. verify that the configuration change was expected. exceptions can be added to this rule to filter expected behavior.	t1566 o365 elastic
an anti-phishing rule may be deleted by a system or network administrator. verify that the configuration change was expected. exceptions can be added to this rule to filter expected behavior.	t1566 o365 elastic
cases in which a user mounts an image file for legitimate reasons	t1566 t1566.001 windows sigma
default browser not in the filter list.	t1566 t1566.001 endpoint splunk
disabling safe links may be done by a system or network administrator. verify that the configuration change was expected. exceptions can be added to this rule to filter expected behavior.	t1566 o365 elastic
false positives are limited to zscalar configuration.	t1566 web server splunk
false positives are limited to zscaler configuration.	t1566 web server splunk
false positives are possible if the organization adds new forms to outlook via an automated method. filter by name or path to reduce false positives.	t1112 t1566 endpoint splunk
false positives in pdf file opened pdf viewer having legitimate url link, however filter as needed.	t1566 t1566.001 endpoint splunk
false positives may be high depending on the environment and consistent use of isos mounting. restrict to servers, or filter out based on commonly used iso names. filter as needed.	t1204 t1204.001 t1566 t1566.001 endpoint splunk
false positives may be present based on macro based approved documents in the organization. filtering may be needed.	t1566 t1566.001 endpoint splunk
false positives may occur if legitimate office documents are creating scheduled tasks. ensure to investigate the scheduled task and the command to be executed. if the task is benign, add the task name to the exclusion list. some applications may legitimately load taskschd.dll.	t1566 t1566.001 endpoint splunk
false positives may occur if legitimate office documents are executing macro code. ensure to investigate the macro code and the command to be executed. if the macro code is benign, add the document name to the exclusion list. some applications may legitimately load vbe7intl.dll, vbe7.dll, or vbeui.dll.	t1566 t1566.001 endpoint splunk
false positives should be limited, but if any are present, filter as needed.	t1003 t1003.002 t1566 t1566.001 endpoint splunk
false positives should be limited, however filter as needed.	t1558.003 t1562.001 t1566 t1566.001 endpoint splunk
file located in the appdata folder with trusted signature	t1566 t1566.001 windows sigma
google workspace users typically share drive resources with a shareable link where parameters are edited to indicate when it is viewable or editable by the intended recipient. it is uncommon for a user in an organization to manually copy a drive object from an external drive to their corporate drive. this may happen where users find a useful spreadsheet in a public drive, for example, and replicate it to their drive. it is uncommon for the copied object to execute a container-bound script either unless the user was intentionally aware, suggesting the object uses container-bound scripts to accomplish a legitimate task.	t1566 google_workspace elastic
in most organizations, device code authentication will be used to access common microsoft service but it may be legitimate for others. filter as needed.	t1528 t1566 t1566.002 azure tenant splunk
it is not uncommon for outlook to write legitimate zip files to the disk.	t1566 t1566.001 endpoint splunk
it or network admin may create an document automation that will run shell script.	t1566 t1566.001 endpoint splunk
legitimate cases in which archives contain iso or img files and the user opens the archive and the image via clicking and not extraction	t1566 windows sigma
legitimate files reported by the users	t1566 o365 elastic
legitimate macro files downloaded from the internet	t1566 t1566.001 windows sigma
legitimate macro files sent as attachments via emails	t1566 t1566.001 windows sigma
legitimate used of encrypted zip files	t1027 t1036 t1105 t1566 t1566.001 windows sigma
limited false positives should be present.	t1566 t1566.001 endpoint splunk
limited false positives will be present, however, tune as necessary. some applications may legitimately load mshtml.dll.	t1566 t1566.001 endpoint splunk
network admin and normal user may send this file attachment as part of their day to day work. having a good protocol in attaching this file type to an e-mail may reduce the risk of having a spear phishing attack.	t1048 t1048.003 t1566 t1566.001 gsuite splunk
no false positives known. filter as needed.	t1566 t1566.001 endpoint splunk
none identified	t1048 t1048.003 t1070 t1204.002 t1546 t1546.011 t1566 t1566.001 splunk server endpoint splunk
normal email contains this link that are known application within the organization or network can be catched by this detection.	t1566 t1566.001 gsuite splunk
normal user or normal transaction may contain the subject and file type attachment that this detection try to search.	t1566 t1566.001 gsuite splunk
office macro for automation may do this behavior	t1566 t1566.001 endpoint splunk
potential fp by sysadmin opening a zip file containing a legitimate iso file	t1566 t1566.001 windows sigma
software installation iso files	t1566 t1566.001 windows sigma
the query is structured in a way that `action` (read, create) is not defined. review the results of this query, filter, and tune as necessary. it may be necessary to generate this query specific to your endpoint product.	t1133 t1190 t1505 t1505.003 t1566 t1566.001 endpoint splunk
there will be limited false positives and it will be different for every environment. tune by child process or command-line as needed.	t1566 t1566.001 endpoint splunk
this detection model will alert on any sender domain that is seen for the first time. this could be a potential false positive. the next step is to investigate and add the url to an allow list if you determine that it is a legitimate sender.	t1566 endpoint splunk
this detection should yield little or no false positive results. it is uncommon for lnk files to be executed from temporary or user directories.	t1566 t1566.002 endpoint splunk
this is an anomaly search, you must specify your domain in the parameters so it either filters outside domains or focus on internal domains. this search may also help investigate compromise of accounts. by looking at for example source ip addresses, document titles and abnormal number of shares and shared target users.	t1566 gdrive splunk
this search will also produce normal activity statistics. fields such as email, ip address, name, parameters.organizer_calendar_id, parameters.target_calendar_id and parameters.event_title may give away phishing intent.for more specific results use email parameter.	t1566 gsuite splunk
this will alert on legitimate macro usage as well, additional tuning is required	t1566 t1566.001 windows sigma
unlikely	t1003 t1003.001 t1003.002 t1003.004 t1003.005 t1003.006 t1005 t1007 t1008 t1012 t1014 t1016 t1018 t1021 t1021.002 t1021.003 t1021.006 t1027 t1027.005 t1033 t1036 t1036.003 t1036.007 t1041 t1046 t1047 t1048 t1048.001 t1053 t1053.003 t1053.005 t1055 t1055.001 t1056 t1057 t1059 t1059.001 t1059.002 t1059.003 t1068 t1070 t1071 t1071.001 t1071.004 t1078 t1082 t1083 t1087 t1090 t1090.001 t1090.003 t1105 t1106 t1112 t1115 t1123 t1127 t1132 t1132.001 t1133 t1134 t1134.001 t1134.002 t1134.004 t1136 t1136.001 t1136.002 t1137 t1137.002 t1140 t1190 t1203 t1204 t1210 t1213 t1213.003 t1216 t1218 t1218.008 t1218.010 t1218.011 t1218.013 t1219 t1486 t1489 t1490 t1496 t1498 t1499 t1499.001 t1505 t1505.003 t1526 t1528 t1543 t1543.003 t1546 t1546.008 t1548 t1548.003 t1550 t1550.003 t1552 t1553 t1553.004 t1555 t1556 t1557 t1557.001 t1558 t1558.003 t1562 t1562.001 t1562.002 t1562.010 t1564 t1564.004 t1566 t1569 t1569.002 t1570 t1574 t1574.001 t1574.002 t1586 t1587 t1587.001 t1588 t1588.002 t1590 t1590.001 t1590.002 t1620 t1649 bitbucket azure m365 okta macos windows linux opencanary sigma
verify whether the user identity, user agent, and/or hostname should be making changes in your environment. suspicious commands from unfamiliar users or hosts should be investigated. if known behavior is causing false positives, it can be exempted from the rule.	t1566 aws elastic
very common in environments that rely heavily on macro documents	t1566 t1566.001 windows sigma
windows office document may contain legitimate url link other than ms office domain. filter is needed	t1566 t1566.001 endpoint splunk