Potential RipZip Attack on Startup Folder
Detects a phishing attack which expands a ZIP file containing a malicious shortcut. If the victim expands the ZIP file via the explorer process, then the explorer process expands the malicious ZIP file and drops a malicious shortcut redirected to a backdoor into the Startup folder. Additionally, the file name of the malicious shortcut in Startup folder contains {0AFACED1-E828-11D1-9187-B532F1E9575D} meaning the folder shortcut operation.
Sigma rule (View on GitHub)
1title: Potential RipZip Attack on Startup Folder
2id: a6976974-ea6f-4e97-818e-ea08625c52cb
3status: test
4description: |
5 Detects a phishing attack which expands a ZIP file containing a malicious shortcut.
6 If the victim expands the ZIP file via the explorer process, then the explorer process expands the malicious ZIP file and drops a malicious shortcut redirected to a backdoor into the Startup folder.
7 Additionally, the file name of the malicious shortcut in Startup folder contains {0AFACED1-E828-11D1-9187-B532F1E9575D} meaning the folder shortcut operation.
8references:
9 - https://twitter.com/jonasLyk/status/1549338335243534336?t=CrmPocBGLbDyE4p6zTX1cg&s=19
10author: Greg (rule)
11date: 2022-07-21
12modified: 2023-01-05
13tags:
14 - attack.persistence
15 - attack.t1547
16logsource:
17 category: file_event
18 product: windows
19detection:
20 selection: # %APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\target.lnk.{0AFACED1-E828-11D1-9187-B532F1E9575D}\target.lnk
21 TargetFilename|contains|all:
22 - '\Microsoft\Windows\Start Menu\Programs\Startup'
23 - '.lnk.{0AFACED1-E828-11D1-9187-B532F1E9575D}'
24 Image|endswith: '\explorer.exe'
25 condition: selection
26falsepositives:
27 - Unknown
28level: high
References
Related rules
- Atbroker Registry Change
- Registry Persistence Mechanisms in Recycle Bin
- Suspicious Driver Install by pnputil.exe
- Suspicious GrpConv Execution
- WINEKEY Registry Modification