YARA · Signature Base (Florian Roth / Nextron)
SIGNATURE_BASE_SUSP_EXPL_Commvault_CVE_2025_57791_Aug25_2
Detects potential exploit for WT-2025-0050, authentication bypass through QCommand argument injection
- Author
- X__Junior
- Date
- 2025-08-21
- Modified
- 2026-05-15
- Score / Quality
- 65 / 85
What this rule detects
Detects potential exploit for WT-2025-0050, authentication bypass through QCommand argument injection
It defines 2 patterns (2 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
rule SIGNATURE_BASE_SUSP_EXPL_Commvault_CVE_2025_57791_Aug25_2 : FILE
{
meta:
= "Detects potential exploit for WT-2025-0050, authentication bypass through QCommand argument injection"
= "X__Junior"
= "4a581a0d-bd1d-599d-a1b9-936dbcda75a8"
= "2025-08-21"
= "2026-05-15"
= "https://labs.watchtowr.com/guess-who-would-be-stupid-enough-to-rob-the-same-vault-twice-pre-auth-rce-chains-in-commvault/"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/expl_commvault_cve_2025_57791.yar#L17-L30"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
= "61e3ddc09157badb2a1abf30da2cc35cac1a723db1134a37cb667be78209b845"
= 65
= 85
= "FILE"
strings:
$sa1 = "_localadmin__"
$sa2 = "-localadmin" base64
condition:
filesize < 20MB and all of them
}
Strings (2 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sa1 | text | "_localadmin__" | |
| $sa2 | text | "-localadmin" | base64 |
Condition
filesize < 20MB and all of themIn plain words (Heuristic)
- The file must be smaller than 20MB (a cheap guard that skips large files).
- All patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Licence & attribution
Author: X__Junior
Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a
Licence: Detection Rule License 1.1 (repository licence)
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: 4a581a0d-bd1d-599d-a1b9-936dbcda75a8
Tags:FILE
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