Browser Session Hijacking T1185

Tactic: Collection

Adversaries may take advantage of security vulnerabilities and inherent functionality in browser software to change content, modify user-behaviors, and intercept information as part of various browser session hijacking techniques.

Events covered

6 catalog events are tagged with this technique by at least one rule.

Authoring guide

These 17 rules share fields, values, and exclusions.

Fields filtered most (26 distinct)

These fields appear most often in rule filters.

FieldRulesHowSample values
CommandLine9contains 4, regex_match 3, eq 2, in 1, wildcard 1(?i)\s+--remote-debugging-\S+, (?i)\s+-start-debugger-service, firefox.exe, --remote-debugging-, -start-debugger-server
process_name5eq 3, in 2chrome.exe, brave browser, brave.exe, firefox.exe, google chrome
sourcetype4eq 4aws:asl, aws:cloudtrail, azure:monitor:aad, o365:management:activity
EventID3eq 31, 4103, 4104, 4688
aws::eventName2eq 2describeeventaggregates
distinct_ip_count2gt 21
host.os.type2eq 2
process.args2eq 1, starts_with 1, wildcard 1--load-extension=/, --remote-debugging-port=922?, --window-position=-*,-*
registry_path2contains 2\\google\\chrome\\extensioninstallallowlist, \\google\\update
Details1eq 10x00000000, 0x00000001
EventType1eq 1exec
Image1ends_with 1\firefox.exe
Operation1eq 1userloggedin
ParentImage1is_not_null 1
Type1eq 1

Top indicator values (65 distinct)

These values appear most often in rule predicates.

FieldKindValueRules (here)Corpus reach
CommandLineregex_match
(?i)\s+--remote-debugging-\S+
33
CommandLineregex_match
(?i)\s+-start-debugger-service
22
CommandLineregex_match
(?i)firefox.+\s+-start-debugger-service
1
process_nameeq
chrome.exe
316
CommandLineeq
firefox.exe
22
aws::eventNameeq
describeeventaggregates
22
distinct_ip_countgt
1
24
CommandLinecontains
--remote-debugging-
1
CommandLinecontains
-start-debugger-server
1
CommandLinecontains
--disable-features
1
CommandLinecontains
--headless
18
CommandLinecontains
--load-extension
12
CommandLinecontains
--remote-debugging-
1
CommandLinecontains
--user-data-dir
12
CommandLinecontains
disableloadextensioncommandlineswitch
1
CommandLinein
*--disable-audio*
1
CommandLinein
*--do-not-de-elevate*
1
CommandLinein
*--mute-audio*
1
CommandLinein
*--no-de-elevate*
1
CommandLinewildcard
"C:\Program Files\Google\Chrome\Application\chrome.exe" --headless
1
CommandLinewildcard
"C:\Program Files\Google\Chrome\Application\chrome.exe" --headless...
1
CommandLinewildcard
"C:\Program Files\Google\Chrome\Application\chrome.exe" --headless --log-level=3
1
CommandLinewildcard
"C:\Program Files\Google\Chrome\Application\chrome.exe" --headless...
1
CommandLinewildcard
"C:\Program Files\Google\Chrome\Application\chrome.exe"...
1
CommandLinewildcard
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
1
CommandLinewildcard
C:\Program Files\Google\Chrome\Application\chrome.exe
1
Detailseq
0x00000000
141
Detailseq
0x00000001
161
EventIDeq
1
1241
EventIDeq
4103
1105

Exclusions (21 distinct)

These values appear most often in top-level exclusions.

FieldKindValueRules excluding
ParentImagein
c:\\program files*
1
ParentImagein
c:\\windows\\system32\\*
1
ParentImagein
c:\\windows\\syswow64\\*
1
ParentImagewildcard
/applications/cypress.app/contents/macos/cypress
1
ParentImagewildcard
/applications/google chrome.app/contents/macos/google chrome
1
ParentImagewildcard
/opt/homebrew/caskroom/chromedriver/*/chromedriver
1
ParentImagewildcard
/users/*/library/caches/cypress/*/cypress.app/contents/macos/cypress
1
ParentImagewildcard
/usr/local/bin/chromedriver
1
ParentImagewildcard
c:\program files (x86)\*.exe
1
ParentImagewildcard
c:\program files\*.exe
1
ParentImagewildcard
c:\windows\explorer.exe
1
ParentImagewildcard
c:\windows\system32\rdpinit.exe
1
ParentImagewildcard
c:\windows\system32\runtimebroker.exe
1
ParentImagewildcard
c:\windows\system32\secocl64.exe
1
ParentImagewildcard
c:\windows\system32\sihost.exe
1

Rules under this technique

These vendors publish rules tagged with this technique.

Platform (all)
Domain (all)

Sigma 2 rules

Elastic 2 rules

Splunk 12 rules

Kusto 1 rule