Potential Compromised 3CXDesktopApp Update Activity
Detects the 3CXDesktopApp updater downloading a known compromised version of the 3CXDesktopApp software
Sigma rule (View on GitHub)
1title: Potential Compromised 3CXDesktopApp Update Activity
2id: e7581747-1e44-4d4b-85a6-0db0b4a00f2a
3related:
4 - id: 3c4b3bbf-36b4-470c-b6cf-f07e8b1c7e26 # Proxy C2
5 type: similar
6 - id: 76bc1601-9546-4b75-9419-06e0e8d10651 # Proxy GH
7 type: similar
8 - id: bd03a0dc-5d93-49eb-b2e8-2dfd268600f8 # DNS C2
9 type: similar
10 - id: 51eecf75-d069-43c7-9ea2-63f75499edd4 # net_connection C2
11 type: similar
12 - id: 93bbde78-dc86-4e73-9ffc-ff8a384ca89c # ProcCreation Exec
13 type: similar
14 - id: 63f3605b-979f-48c2-b7cc-7f90523fed88 # ProcCreation ChildProc
15 type: similar
16 - id: d0b65ad3-e945-435e-a7a9-438e62dd48e9 # ImageLoad
17 type: similar
18status: test
19description: Detects the 3CXDesktopApp updater downloading a known compromised version of the 3CXDesktopApp software
20references:
21 - https://www.linkedin.com/feed/update/urn:li:activity:7047435754834198529/
22 - https://www.huntress.com/blog/3cx-voip-software-compromise-supply-chain-threats
23author: Nasreddine Bencherchali (Nextron Systems)
24date: 2023-03-29
25tags:
26 - attack.defense-evasion
27 - attack.t1218
28 - attack.execution
29 - detection.emerging-threats
30logsource:
31 category: process_creation
32 product: windows
33detection:
34 selection:
35 Image|endswith: '\3CXDesktopApp\app\update.exe'
36 CommandLine|contains|all:
37 - '--update'
38 - 'http'
39 - '/electron/update/win32/18.12'
40 condition: selection
41falsepositives:
42 - Unknown
43level: high
References
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