YARA · ditekSHen detection
DITEKSHEN_MALWARE_Win_Validalpha
Detects ValidApha / BlackRAT
- Author
- ditekshen
- Date
- 2020-11-06
- Modified
- 2024-11-01
- Score / Quality
- 75 / 75
What this rule detects
Detects ValidApha / BlackRAT
Associated malware family: Validalpha.
Targets: Windows PE.
It defines 9 patterns (9 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
malware-win-validalpha.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Validalpha : FILE
{
meta:
= "Detects ValidApha / BlackRAT"
= "ditekshen"
= "3162eb5f-6e2d-598a-b199-22b70ec8a773"
= "2020-11-06"
= "2024-11-01"
= "https://github.com/ditekshen/detection"
= "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/malware.yar#L11720-L11736"
= "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
= "54d170076d1b32cee6f6252d40548acc7e23b467d692c59d6146a8aadf431211"
= 75
= 75
= "FILE"
strings:
$x1 = "RAT/Black/" ascii
$x2 = "RAT/Black/Client_Go/" ascii
$s1 = "main.RunTask" fullword ascii
$s2 = "main.CmdShell" fullword ascii
$s3 = "main.SelfDelete" fullword ascii
$s4 = "main.RecvPacket" fullword ascii
$s5 = "main.FileDownload" fullword ascii
$s6 = "main.CaptureScreen" fullword ascii
$s7 = "main.PeekNamedPipe" fullword ascii
condition:
uint16( 0 ) == 0x5a4d and ( ( 1 of ( $x* ) and 2 of ( $s* ) ) or ( 6 of ( $s* ) ) )
}
Strings (9 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $x1 | text | "RAT/Black/" | ascii |
| $x2 | text | "RAT/Black/Client_Go/" | ascii |
| $s1 | text | "main.RunTask" | fullword ascii |
| $s2 | text | "main.CmdShell" | fullword ascii |
| $s3 | text | "main.SelfDelete" | fullword ascii |
| $s4 | text | "main.RecvPacket" | fullword ascii |
| $s5 | text | "main.FileDownload" | fullword ascii |
| $s6 | text | "main.CaptureScreen" | fullword ascii |
| $s7 | text | "main.PeekNamedPipe" | fullword ascii |
Condition
uint16( 0 ) == 0x5a4d and ( ( 1 of ( $x* ) and 2 of ( $s* ) ) or ( 6 of ( $s* ) ) )In plain words (Heuristic)
- The file must start with “MZ” — a Windows executable (PE).
- At least 1 patterns in ( $x* ) must match.
- At least 2 patterns in ( $s* ) must match.
- At least 6 patterns in ( $s* ) must match.
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References
Licence & attribution
Author: ditekshen
Source repository: ditekSHen detection @ e76c93dcde
Licence: BSD 2-Clause License (repository licence)
Copyright notice: Copyright 2021 by ditekSHen (https://github.com/ditekshen/detection).
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: 3162eb5f-6e2d-598a-b199-22b70ec8a773
Tags:FILE
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