YARA · SEKOIA.IO Community
SEKOIA_Guerrilla_Lemongroup
No description has been set in the source file - SEKOIA
- Author
- Sekoia.io
- Date
- 2023-05-23
- Modified
- 2024-12-19
- Score / Quality
- 75 / 80
What this rule detects
No description has been set in the source file - SEKOIA
It defines 11 patterns (9 text, 2 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
guerrilla-lemongroup.yarDetection Rule License 1.1
rule SEKOIA_Guerrilla_Lemongroup : FILE
{
meta:
= "No description has been set in the source file - SEKOIA"
= "Sekoia.io"
= "df635b5a-a19a-48ab-9a3a-9723e265c71d"
= "2023-05-23"
= "2024-12-19"
= "https://github.com/SEKOIA-IO/Community"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/guerrilla_lemongroup.yar#L1-L28"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
= "b644cb537a42217f2549f37bfe07ae0b7ba39fc248ab3d5fd870384c7684683b"
= 75
= 80
= "FILE"
= "1.0"
= "TLP:CLEAR"
strings:
$dex = { 64 65 78 0A 30 33 ?? 00 }
$odex = { 64 65 79 0A 30 33 ?? 00 }
$s2 = "data response code===" ascii
$s3 = "httpCon:" ascii
$s4 = "processName :" ascii
$s5 = "startListTasks......" ascii
$s6 = "url==" ascii
$s7 = "java core run ZYGOTE_PROCESS" ascii
$api1 = "/api.php" ascii
$api2 = "/event.php" ascii
$api3 = "/apiRS.php" ascii
condition:
($dex at 0 or $odex at 0 ) and filesize > 100KB and filesize < 5MB and 5 of ( $s* ) and 1 of ( $api* )
}
Strings (11 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $dex | hex | { 64 65 78 0A 30 33 ?? 00 } | |
| $odex | hex | { 64 65 79 0A 30 33 ?? 00 } | |
| $s2 | text | "data response code===" | ascii |
| $s3 | text | "httpCon:" | ascii |
| $s4 | text | "processName :" | ascii |
| $s5 | text | "startListTasks......" | ascii |
| $s6 | text | "url==" | ascii |
| $s7 | text | "java core run ZYGOTE_PROCESS" | ascii |
| $api1 | text | "/api.php" | ascii |
| $api2 | text | "/event.php" | ascii |
| $api3 | text | "/apiRS.php" | ascii |
Condition
($dex at 0 or $odex at 0 ) and filesize > 100KB and filesize < 5MB and 5 of ( $s* ) and 1 of ( $api* )In plain words (Heuristic)
- The file must be smaller than 5MB (a cheap guard that skips large files).
- The file must be larger than 100KB.
- At least 5 patterns in ( $s* ) must match.
- At least 1 patterns in ( $api* ) must match.
- Pattern $dex must be found at offset 0.
- Pattern $odex must be found at offset 0.
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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: df635b5a-a19a-48ab-9a3a-9723e265c71d
Metadata
| version | 1.0 |
|---|---|
| classification | TLP:CLEAR |
Tags:FILE
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