YARA · SEKOIA.IO Community
SEKOIA_Tool_Edrsandblast_Api_Strings
Detects EDRSandblast API strings
- Author
- Sekoia.io
- Date
- 2024-01-08
- Modified
- 2024-12-19
- Score / Quality
- 75 / 80
What this rule detects
Detects EDRSandblast API strings
Targets: Windows PE.
It defines 5 patterns (5 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
tool-edrsandblast-api-strings.yarDetection Rule License 1.1
rule SEKOIA_Tool_Edrsandblast_Api_Strings : FILE
{
meta:
= "Detects EDRSandblast API strings"
= "Sekoia.io"
= "8a5dc171-dce8-4b5a-96e9-53dd1855e8c1"
= "2024-01-08"
= "2024-12-19"
= "https://github.com/SEKOIA-IO/Community"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/tool_edrsandblast_api_strings.yar#L1-L21"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
= "cd6afe68cf04e4949add323e0b5af5ea577b3dca07743e312e8236bf5c937672"
= 75
= 80
= "FILE"
= "1.0"
= "TLP:CLEAR"
strings:
$ = "[!] Required driver file not present at" wide
$ = "[!] New uninstall / install attempt failed" wide
$ = "[!] Kernel offsets are missing from the CSV" wide
$ = "[+] Downloading wdigest offsets from the MS Symbol Server" wide
$ = "[+] Check if EDR callbacks are registered on process" wide
condition:
uint16be( 0 ) == 0x4d5a and filesize < 1MB and 4 of them
}
Strings (5 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $ | text | "[!] Required driver file not present at" | wide |
| $ | text | "[!] New uninstall / install attempt failed" | wide |
| $ | text | "[!] Kernel offsets are missing from the CSV" | wide |
| $ | text | "[+] Downloading wdigest offsets from the MS Symbol Server" | wide |
| $ | text | "[+] Check if EDR callbacks are registered on process" | wide |
Condition
uint16be( 0 ) == 0x4d5a and filesize < 1MB and 4 of themIn plain words (Heuristic)
- The file must start with “MZ” — a Windows executable (PE).
- The file must be smaller than 1MB (a cheap guard that skips large files).
- At least 4 patterns in the rule must match.
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References
Licence & attribution
Author: Sekoia.io
Source repository: SEKOIA.IO Community @ a438a5901a
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: 8a5dc171-dce8-4b5a-96e9-53dd1855e8c1
Metadata
| version | 1.0 |
|---|---|
| classification | TLP:CLEAR |
Tags:FILE
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