From 38552e98cf850ee52ff77a03033ba30c81413fc7 Mon Sep 17 00:00:00 2001
From: WojciechLesicki <wojciech.lesicki@gmail.com>
Date: Tue, 25 May 2021 15:47:34 +0200
Subject: [PATCH 1/3] Adding some pipes

---
 rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml b/rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml
index 958bb676a..32d6de754 100644
--- a/rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml
+++ b/rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml
@@ -17,13 +17,15 @@ logsource:
    category: pipe_created
    definition: 'Note that you have to configure logging for Named Pipe Events in Sysmon config (Event ID 17)'
 detection:
-   selection_start:
+   selection_MSSE_start:
       PipeName|startswith: '\MSSE-' 
-   selection_end:
+   selection_MSSE_end:
       PipeName|endswith: '-server'
-   selection_others:
+   selection_postex:
+      PipeName|startswith: '\postex_'
+   selection_msagent:
       PipeName|startswith: '\msagent_'
-   condition: selection_start and selection_end
+   condition: selection_MSSE_start and selection_MSSE_end or selection_postex or selection_msagent 
 falsepositives:
    - Unknown
 level: critical

From f1a0308e730c1cd9c9cb66aec5a35b541ee8aeb7 Mon Sep 17 00:00:00 2001
From: WojciechLesicki <wojciech.lesicki@gmail.com>
Date: Tue, 25 May 2021 21:07:23 +0200
Subject: [PATCH 2/3] Add one more pipe, references etc.

---
 .../windows/pipe_created/sysmon_mal_cobaltstrike.yml  | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml b/rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml
index 32d6de754..f07798711 100644
--- a/rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml
+++ b/rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml
@@ -6,8 +6,9 @@ references:
     - https://twitter.com/d4rksystem/status/1357010969264873472
     - https://labs.f-secure.com/blog/detecting-cobalt-strike-default-modules-via-named-pipe-analysis/
     - https://github.com/Neo23x0/sigma/issues/253
-date: 2021/04/23
-author: Florian Roth
+    - https://blog.cobaltstrike.com/2021/02/09/learn-pipe-fitting-for-all-of-your-offense-projects/
+date: 2021/05/25
+author: Florian Roth, Wojciech Lesicki
 tags:
     - attack.defense_evasion
     - attack.privilege_escalation
@@ -15,7 +16,7 @@ tags:
 logsource:
    product: windows
    category: pipe_created
-   definition: 'Note that you have to configure logging for Named Pipe Events in Sysmon config (Event ID 17)'
+   definition: 'Note that you have to configure logging for Named Pipe Events in Sysmon config (Event ID 17 and Event ID 18). In the current popular sysmon configuration (https://github.com/SwiftOnSecurity/sysmon-config) this is not there, you have to add it yourself.'
 detection:
    selection_MSSE_start:
       PipeName|startswith: '\MSSE-' 
@@ -23,9 +24,11 @@ detection:
       PipeName|endswith: '-server'
    selection_postex:
       PipeName|startswith: '\postex_'
+   selection_postex_ssh:
+      PipeName|startswith: '\postex_ssh_'
    selection_msagent:
       PipeName|startswith: '\msagent_'
-   condition: selection_MSSE_start and selection_MSSE_end or selection_postex or selection_msagent 
+   condition: selection_MSSE_start and selection_MSSE_end or selection_postex or or selection_postex_ssh or selection_msagent 
 falsepositives:
    - Unknown
 level: critical

From 8b707bc94821879f9aee2f16a59acae86f975578 Mon Sep 17 00:00:00 2001
From: WojciechLesicki <wojciech.lesicki@gmail.com>
Date: Tue, 25 May 2021 21:58:22 +0200
Subject: [PATCH 3/3] Added also \status_ pipe.

---
 rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml b/rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml
index f07798711..5ce5b4f3d 100644
--- a/rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml
+++ b/rules/windows/pipe_created/sysmon_mal_cobaltstrike.yml
@@ -26,9 +26,11 @@ detection:
       PipeName|startswith: '\postex_'
    selection_postex_ssh:
       PipeName|startswith: '\postex_ssh_'
+   selection_status:
+      PipeName|startswith: '\status_'
    selection_msagent:
       PipeName|startswith: '\msagent_'
-   condition: selection_MSSE_start and selection_MSSE_end or selection_postex or or selection_postex_ssh or selection_msagent 
+   condition: selection_MSSE_start and selection_MSSE_end or selection_postex or selection_postex_ssh or selection_status or selection_msagent 
 falsepositives:
    - Unknown
 level: critical