Suspicious File Download From File Sharing Domain Via Wget.EXE

 1title: Suspicious File Download From File Sharing Domain Via Wget.EXE
 2id: a0d7e4d2-bede-4141-8896-bc6e237e977c
 3status: experimental
 4description: Detects potentially suspicious file downloads from file sharing domains using wget.exe
 5references:
 6    - https://labs.withsecure.com/publications/fin7-target-veeam-servers
 7    - https://github.com/WithSecureLabs/iocs/blob/344203de742bb7e68bd56618f66d34be95a9f9fc/FIN7VEEAM/iocs.csv
 8    - https://www.microsoft.com/en-us/security/blog/2024/01/17/new-ttps-observed-in-mint-sandstorm-campaign-targeting-high-profile-individuals-at-universities-and-research-orgs/
 9author: Nasreddine Bencherchali (Nextron Systems)
10date: 2023/05/05
11modified: 2024/02/09
12tags:
13    - attack.execution
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection_img:
19        - Image|endswith: '\wget.exe'
20        - OriginalFileName: 'wget.exe'
21    selection_websites:
22        CommandLine|contains:
23            - '.githubusercontent.com'       # Includes both gists and github repositories / Michael Haag (idea)
24            - 'anonfiles.com'
25            - 'cdn.discordapp.com'
26            - 'cdn.discordapp.com/attachments/'
27            - 'ddns.net'
28            - 'dl.dropboxusercontent.com'
29            - 'ghostbin.co'
30            - 'glitch.me'
31            - 'gofile.io'
32            - 'hastebin.com'
33            - 'mediafire.com'
34            - 'mega.nz'
35            - 'onrender.com'
36            - 'paste.ee'
37            - 'pastebin.com'
38            - 'pastebin.pl'
39            - 'pastetext.net'
40            - 'privatlab.com'
41            - 'privatlab.net'
42            - 'send.exploit.in'
43            - 'sendspace.com'
44            - 'storage.googleapis.com'
45            - 'storjshare.io'
46            - 'supabase.co'
47            - 'temp.sh'
48            - 'transfer.sh'
49            - 'ufile.io'
50    selection_http:
51        CommandLine|contains: 'http'
52    selection_flag:
53        - CommandLine|re: '\s-O\s'
54        - CommandLine|contains: '--output-document'
55    selection_ext:
56        CommandLine|endswith:
57            - '.ps1'
58            - ".ps1'"
59            - '.ps1"'
60            - '.dat'
61            - ".dat'"
62            - '.dat"'
63            - '.msi'
64            - ".msi'"
65            - '.msi"'
66            - '.bat'
67            - ".bat'"
68            - '.bat"'
69            - '.exe'
70            - ".exe'"
71            - '.exe"'
72            - '.vbs'
73            - ".vbs'"
74            - '.vbs"'
75            - '.vbe'
76            - ".vbe'"
77            - '.vbe"'
78            - '.hta'
79            - ".hta'"
80            - '.hta"'
81            - '.dll'
82            - ".dll'"
83            - '.dll"'
84            - '.psm1'
85            - ".psm1'"
86            - '.psm1"'
87    condition: all of selection_*
88falsepositives:
89    - Unknown
90level: high