Skip to content

YARA · ditekSHen detection

DITEKSHEN_MALWARE_Win_Nanocore

Detects NanoCore

MalwareNanocoreditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X
Author
ditekSHen
Date
2020-11-06
Modified
2024-11-01
Score / Quality
75 / 75

What this rule detects

Detects NanoCore

Associated malware family: Nanocore.

Targets: Windows PE.

It defines 20 patterns (20 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

malware-win-nanocore.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Nanocore : FILE
{
	meta:
		description = "Detects NanoCore"
		author = "ditekSHen"
		id = "931b98f6-df2b-538b-bc49-ecbbd24334da"
		date = "2020-11-06"
		modified = "2024-11-01"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/malware.yar#L7654-L7681"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "6336260e0af2b4b51338ee066f41b7c58aa134a6c03ca110db7e088edf2b65a7"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$x1 = "NanoCore Client" fullword ascii
		$x2 = "NanoCore.ClientPlugin" fullword ascii
		$x3 = "NanoCore.ClientPluginHost" fullword ascii
		$i1 = "IClientApp" fullword ascii
		$i2 = "IClientData" fullword ascii
		$i3 = "IClientNetwork" fullword ascii
		$i4 = "IClientAppHost" fullword ascii
		$i5 = "IClientDataHost" fullword ascii
		$i6 = "IClientLoggingHost" fullword ascii
		$i7 = "IClientNetworkHost" fullword ascii
		$i8 = "IClientUIHost" fullword ascii
		$i9 = "IClientNameObjectCollection" fullword ascii
		$i10 = "IClientReadOnlyNameObjectCollection" fullword ascii
		$s1 = "ClientPlugin" fullword ascii
		$s2 = "EndPoint" fullword ascii
		$s3 = "IPAddress" fullword ascii
		$s4 = "IPEndPoint" fullword ascii
		$s5 = "IPHostEntr" fullword ascii
		$s6 = "get_ClientSettings" fullword ascii
		$s7 = "get_Connected" fullword ascii

	condition:
		uint16( 0 ) == 0x5a4d and ( 2 of ( $x* ) or 8 of ( $i* ) or all of ( $s* ) or ( 1 of ( $x* ) and ( 3 of ( $i* ) or 2 of ( $s* ) ) ) )
}

Strings (20 patterns)

IdentifierTypeValueModifiers
$x1text"NanoCore Client"fullword ascii
$x2text"NanoCore.ClientPlugin"fullword ascii
$x3text"NanoCore.ClientPluginHost"fullword ascii
$i1text"IClientApp"fullword ascii
$i2text"IClientData"fullword ascii
$i3text"IClientNetwork"fullword ascii
$i4text"IClientAppHost"fullword ascii
$i5text"IClientDataHost"fullword ascii
$i6text"IClientLoggingHost"fullword ascii
$i7text"IClientNetworkHost"fullword ascii
$i8text"IClientUIHost"fullword ascii
$i9text"IClientNameObjectCollection"fullword ascii
$i10text"IClientReadOnlyNameObjectCollection"fullword ascii
$s1text"ClientPlugin"fullword ascii
$s2text"EndPoint"fullword ascii
$s3text"IPAddress"fullword ascii
$s4text"IPEndPoint"fullword ascii
$s5text"IPHostEntr"fullword ascii
$s6text"get_ClientSettings"fullword ascii
$s7text"get_Connected"fullword ascii

Condition

uint16( 0 ) == 0x5a4d and ( 2 of ( $x* ) or 8 of ( $i* ) or all of ( $s* ) or ( 1 of ( $x* ) and ( 3 of ( $i* ) or 2 of ( $s* ) ) ) )

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • All patterns in ( $s* ) must match.
  • At least 2 patterns in ( $x* ) must match.
  • At least 8 patterns in ( $i* ) must match.
  • At least 1 patterns in ( $x* ) must match.
  • At least 3 patterns in ( $i* ) must match.
  • At least 2 patterns in ( $s* ) 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.

Open in editor

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).

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 931b98f6-df2b-538b-bc49-ecbbd24334da

Tags:FILE