Added detection testing service results inUAC Bypass With Colorui COM Object

This commit is contained in:
root
2021-08-18 15:46:05 +00:00
parent 483bc07b98
commit 65273870d1
@@ -6,18 +6,18 @@ author: Teoderick Contreras, Splunk
type: TTP
datamodel:
- Endpoint
description: This search is to detect a possible uac bypass using the colorui.dll COM Object.
this technique was seen in so many malware and ransomware like lockbit where it make use of the colorui.dll
COM CLSID to bypass UAC.
search: '`sysmon` EventCode=7 ImageLoaded="*\\colorui.dll" process_name != "colorcpl.exe" NOT(Image IN("*\\windows\\*", "*\\program files*"))
| stats count min(_time) as firstTime max(_time) as lastTime by Image ImageLoaded process_name Computer EventCode Signed ProcessId
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
description: This search is to detect a possible uac bypass using the colorui.dll
COM Object. this technique was seen in so many malware and ransomware like lockbit
where it make use of the colorui.dll COM CLSID to bypass UAC.
search: '`sysmon` EventCode=7 ImageLoaded="*\\colorui.dll" process_name != "colorcpl.exe"
NOT(Image IN("*\\windows\\*", "*\\program files*")) | stats count min(_time) as
firstTime max(_time) as lastTime by Image ImageLoaded process_name Computer EventCode
Signed ProcessId | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
| `uac_bypass_with_colorui_com_object_filter`'
how_to_implement: To successfully implement this search, you need to be ingesting
logs with the process name, parent process, and command-line executions from your
endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the
Sysmon TA.
Sysmon TA.
known_false_positives: not so common. but 3rd part app may load this dll.
references:
- https://news.sophos.com/en-us/2020/04/24/lockbit-ransomware-borrows-tricks-to-keep-up-with-revil-and-maze/
@@ -36,17 +36,16 @@ tags:
- Splunk Cloud
required_fields:
- _time
- Image
- ImageLoaded
- process_name
- Computer
- EventCode
- Signed
- Image
- ImageLoaded
- process_name
- Computer
- EventCode
- Signed
- ProcessId
security_domain: endpoint
impact: 60
confidence: 80
# (impact * confidence)/100
confidence: 80
risk_score: 48
context:
- Source:Endpoint
@@ -66,4 +65,4 @@ tags:
type: Other
role:
- Other
automated_detection_testing: passed