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MALPEDIA_Win_Pseudo_Manuscrypt_Auto

autogenerated rule brought to you by yara-signator

MalwarePseudo ManuscryptMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Pseudo Manuscrypt.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-pseudo-manuscrypt-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Pseudo_Manuscrypt_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "a2bb2d28-922c-5165-af00-8264e9dc198d"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.pseudo_manuscrypt"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.pseudo_manuscrypt_auto.yar#L1-L133"
		license_url = "N/A"
		logic_hash = "c1375ce99acff00af3750f77d989563b610b0d118b8fb67c014ab6172f438d65"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260422"
		malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
		malpedia_version = "20260504"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { 8b0f 8b55f8 8b4708 2bc2 50 8d0411 50 }
		$sequence_1 = { 8b36 8b4344 2bc6 85c0 7fbf 5f 5e }
		$sequence_2 = { 8b5d0c 42 56 57 894df8 8d43ff 8955f0 }
		$sequence_3 = { 8bf0 85f6 0f8494000000 56 e8???????? 83c404 8945cc }
		$sequence_4 = { 8b4df8 03cf 833900 75c9 8b4d0c 83c114 894d0c }
		$sequence_5 = { ff15???????? 8906 85c0 7440 8d4e1c 897e10 c7461400040000 }
		$sequence_6 = { 53 56 8945f8 8b4510 57 8bf9 8945f4 }
		$sequence_7 = { 8bec 81ecdc070000 a1???????? 33c5 8945fc 53 56 }
		$sequence_8 = { 8d044502000000 50 8b45fc ff75f0 03c6 50 e8???????? }
		$sequence_9 = { 85c0 7427 8d4df8 51 8d4e78 e8???????? }

	condition:
		7 of them and filesize < 753664
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8b0f 8b55f8 8b4708 2bc2 50 8d0411 50 }
$sequence_1hex{ 8b36 8b4344 2bc6 85c0 7fbf 5f 5e }
$sequence_2hex{ 8b5d0c 42 56 57 894df8 8d43ff 8955f0 }
$sequence_3hex{ 8bf0 85f6 0f8494000000 56 e8???????? 83c404 8945cc }
$sequence_4hex{ 8b4df8 03cf 833900 75c9 8b4d0c 83c114 894d0c }
$sequence_5hex{ ff15???????? 8906 85c0 7440 8d4e1c 897e10 c7461400040000 }
$sequence_6hex{ 53 56 8945f8 8b4510 57 8bf9 8945f4 }
$sequence_7hex{ 8bec 81ecdc070000 a1???????? 33c5 8945fc 53 56 }
$sequence_8hex{ 8d044502000000 50 8b45fc ff75f0 03c6 50 e8???????? }
$sequence_9hex{ 85c0 7427 8d4df8 51 8d4e78 e8???????? }

Condition

7 of them and filesize < 753664

In plain words (Heuristic)

  • The file must be smaller than 753664 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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References

Licence & attribution

Author: Felix Bilstein - yara-signator at cocacoding dot com

Source repository: Malpedia signator rules @ c901f97b7d

Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)

Original rule

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

Rule id: a2bb2d28-922c-5165-af00-8264e9dc198d

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE