YARA · SEKOIA.IO Community
SEKOIA_Apt_Sandworm_Orcshred_Apr2022
Detects the ORCSHRED script
- Author
- Sekoia.io
- Date
- 2022-04-12
- Modified
- 2024-12-19
- Score / Quality
- 75 / 80
What this rule detects
Detects the ORCSHRED script
It defines 4 patterns (4 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
apt-sandworm-orcshred-apr2022.yarDetection Rule License 1.1
rule SEKOIA_Apt_Sandworm_Orcshred_Apr2022 : FILE
{
meta:
= "Detects the ORCSHRED script"
= "Sekoia.io"
= "1a88800c-29e1-4e2c-8374-f5a93dd9fd91"
= "2022-04-12"
= "2024-12-19"
= "https://github.com/SEKOIA-IO/Community"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_sandworm_orcshred_apr2022.yar#L1-L18"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
= "de38cf43fa5cc756c26ae241f2e60636c2aabbe4254fdeca2340c62873498de7"
= 75
= 80
= "FILE"
= "1.0"
= "TLP:CLEAR"
strings:
$ = "find /etc -name os-release >"
$ = "/bin/bash /var/"
$ = "crontab -l >"
$ = ".sh & disown"
condition:
3 of them and filesize < 2KB
}
Strings (4 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $ | text | "find /etc -name os-release >" | |
| $ | text | "/bin/bash /var/" | |
| $ | text | "crontab -l >" | |
| $ | text | ".sh & disown" |
Condition
3 of them and filesize < 2KBIn plain words (Heuristic)
- The file must be smaller than 2KB (a cheap guard that skips large files).
- At least 3 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.
Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
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: 1a88800c-29e1-4e2c-8374-f5a93dd9fd91
Metadata
| version | 1.0 |
|---|---|
| classification | TLP:CLEAR |
Tags:FILE
Related rules
- APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-09-10
- APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-10-21
- APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-10-21
- APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-09-27
- APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-09-27
- APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-09-23
- APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-06-11
- APT / threat actorSEKOIA.IO Community· Sekoia.io· 2024-03-06