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YARA · ditekSHen detection

DITEKSHEN_MALWARE_Win_Simplepacker

Detects Hydrochasma packer / dropper

MalwareSimplepackerditekSHen 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 Hydrochasma packer / dropper

Associated malware family: Simplepacker.

Targets: Windows PE.

It defines 4 patterns (4 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-simplepacker.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Simplepacker : FILE
{
	meta:
		description = "Detects Hydrochasma packer / dropper"
		author = "ditekSHen"
		id = "449f7531-408f-5bda-aa64-d148c363c3e5"
		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#L10627-L10638"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "e2c07947fdf53814669250052f6cceb7412aa302422f3a0b430879da638c7e6a"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$p1 = "\\cloud-compiler-" ascii
		$p2 = "\\deps\\simplepacker.pdb" ascii
		$s1 = "uespemosarenegylmodnarodsetybdetqueue" ascii
		$s2 = "None{\"" ascii

	condition:
		uint16( 0 ) == 0x5a4d and ( all of ( $p* ) or ( 1 of ( $p* ) and all of ( $s* ) ) )
}

Strings (4 patterns)

IdentifierTypeValueModifiers
$p1text"\\cloud-compiler-"ascii
$p2text"\\deps\\simplepacker.pdb"ascii
$s1text"uespemosarenegylmodnarodsetybdetqueue"ascii
$s2text"None{\""ascii

Condition

uint16( 0 ) == 0x5a4d and ( all of ( $p* ) or ( 1 of ( $p* ) and all of ( $s* ) ) )

In plain words (Heuristic)

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

Original rule

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

Rule id: 449f7531-408f-5bda-aa64-d148c363c3e5

Tags:FILE

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