YARA · SEKOIA.IO Community
SEKOIA_Tool_Execit_Obfuscator_Strings
Detects ExecIT Dlls
- Author
- Sekoia.io
- Date
- 2024-09-11
- Modified
- 2024-12-19
- Score / Quality
- 75 / 80
What this rule detects
Detects ExecIT Dlls
Targets: Windows PE.
It defines 9 patterns (9 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
tool-execit-obfuscator-strings.yarDetection Rule License 1.1
rule SEKOIA_Tool_Execit_Obfuscator_Strings : FILE
{
meta:
= "Detects ExecIT Dlls"
= "Sekoia.io"
= "59eaeb20-150b-41a4-b866-1c91a07623ac"
= "2024-09-11"
= "2024-12-19"
= "https://github.com/SEKOIA-IO/Community"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/tool_execit_obfuscator_strings.yar#L1-L28"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
= "1c185e2e11d8eadccfb130766ca30d85"
= "a0898f57f2b139ea278d8a7e97bbe358"
= "e0e12a8891f5585ce1ad55dbffb4f9c2"
= "d4102676d536bacffcf6c94364e26828"
= "cd8edbe9c6cb7dcde56860e0ff47f4496b36848f46a89f6945b7762f86ff5e59"
= 75
= 80
= "FILE"
= "1.0"
= "TLP:CLEAR"
strings:
$ = "yromeMlautriVetacollAtN"
$ = "xEdaerhTetaerCtN"
$ = "tcejbOelgniSroFtiaWtN"
$ = "lld.esablenrek"
$ = "txetnoCdaerhTteG"
$ = "txetnoCdaerhTteS"
$ = "cef_api_hash"
$ = "cef_execute_process"
$ = "cef_get_path"
condition:
uint16be( 0 ) == 0x4d5a and 5 of them
}
Strings (9 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $ | text | "yromeMlautriVetacollAtN" | |
| $ | text | "xEdaerhTetaerCtN" | |
| $ | text | "tcejbOelgniSroFtiaWtN" | |
| $ | text | "lld.esablenrek" | |
| $ | text | "txetnoCdaerhTteG" | |
| $ | text | "txetnoCdaerhTteS" | |
| $ | text | "cef_api_hash" | |
| $ | text | "cef_execute_process" | |
| $ | text | "cef_get_path" |
Condition
uint16be( 0 ) == 0x4d5a and 5 of themIn plain words (Heuristic)
- The file must start with “MZ” — a Windows executable (PE).
- At least 5 patterns in the rule must match.
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References
Sample hashes
Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).
- 1c185e2e11d8eadccfb130766ca30d85
- a0898f57f2b139ea278d8a7e97bbe358
- e0e12a8891f5585ce1ad55dbffb4f9c2
- d4102676d536bacffcf6c94364e26828
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: 59eaeb20-150b-41a4-b866-1c91a07623ac
Metadata
| version | 1.0 |
|---|---|
| classification | TLP:CLEAR |
Tags:FILE
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