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DITEKSHEN_MALWARE_Win_Rhttpctrl

RHttpCtrl backdoor payload

MalwareRhttpctrlditekSHen 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

RHttpCtrl backdoor payload

Associated malware family: Rhttpctrl.

Targets: Windows PE.

It defines 9 patterns (9 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-rhttpctrl.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Rhttpctrl : FILE
{
	meta:
		description = "RHttpCtrl backdoor payload"
		author = "ditekSHen"
		id = "fa80db13-90af-5d6a-bcc2-ad1f6808268e"
		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#L1249-L1265"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "a8b27fcc4636c2fe02a0e006295ece7f705cc9a042921f66ef1f9b6a88aaf9a1"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "%d_%04d%02d%02d%02d%02d%02d." ascii
		$s2 = "ver=%s&id=%06d&type=" ascii
		$s3 = "ver=%d&id=%s&random=%d&" ascii
		$s4 = "id=%d&output=%s" ascii
		$s5 = "Error:WinHttpCrackUrl failed!/n" ascii
		$s6 = "Error:SendRequest failed!/n" ascii
		$s7 = ".exe a %s %s" ascii
		$s8 = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0" fullword wide
		$pdb = "\\WorkSources\\RHttpCtrl\\Server\\Release\\svchost.pdb" ascii

	condition:
		uint16( 0 ) == 0x5a4d and ( 5 of ( $s* ) or ( $pdb and 2 of ( $s* ) ) )
}

Strings (9 patterns)

IdentifierTypeValueModifiers
$s1text"%d_%04d%02d%02d%02d%02d%02d."ascii
$s2text"ver=%s&id=%06d&type="ascii
$s3text"ver=%d&id=%s&random=%d&"ascii
$s4text"id=%d&output=%s"ascii
$s5text"Error:WinHttpCrackUrl failed!/n"ascii
$s6text"Error:SendRequest failed!/n"ascii
$s7text".exe a %s %s"ascii
$s8text"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0"fullword wide
$pdbtext"\\WorkSources\\RHttpCtrl\\Server\\Release\\svchost.pdb"ascii

Condition

uint16( 0 ) == 0x5a4d and ( 5 of ( $s* ) or ( $pdb and 2 of ( $s* ) ) )

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 5 patterns in ( $s* ) must match.
  • At least 2 patterns in ( $s* ) must match.
  • Pattern $pdb must be present.

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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: fa80db13-90af-5d6a-bcc2-ad1f6808268e

Tags:FILE

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