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