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MALPEDIA_Win_Starsypound_Auto

autogenerated rule brought to you by yara-signator

MalwareStarsypoundMalpedia 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: Starsypound.

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

Summary generated from the rule's metadata and condition.

Rule source

win-starsypound-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Starsypound_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "70e37162-3a73-596a-8d7d-42b9d85b78f7"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.starsypound"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.starsypound_auto.yar#L1-L119"
		license_url = "N/A"
		logic_hash = "abf4ae91c4287e1227ba24bd55f61dc3c1250c1b8b21f760166157e29806933f"
		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 = { ff15???????? 8dbc2458010000 83c9ff 33c0 }
		$sequence_1 = { 68???????? 52 e8???????? 83c420 85c0 7444 8b5304 }
		$sequence_2 = { 53 56 57 6a18 e8???????? 8bb42424040000 }
		$sequence_3 = { 8d4c2428 68???????? 51 e8???????? 56 8d542434 }
		$sequence_4 = { 8bfd 8d44240c f3a5 8b5500 8b3d???????? 6a00 }
		$sequence_5 = { 885c3438 c744241804010000 ff15???????? 8dbc2458010000 83c9ff 33c0 }
		$sequence_6 = { 50 8d4c2424 56 51 52 }
		$sequence_7 = { f3a4 885c0444 bf???????? 83c9ff 33c0 33f6 }
		$sequence_8 = { 83c40c 85c0 7e2b eb08 }
		$sequence_9 = { e8???????? 68c0270900 ff15???????? e8???????? 5f }

	condition:
		7 of them and filesize < 40960
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ff15???????? 8dbc2458010000 83c9ff 33c0 }
$sequence_1hex{ 68???????? 52 e8???????? 83c420 85c0 7444 8b5304 }
$sequence_2hex{ 53 56 57 6a18 e8???????? 8bb42424040000 }
$sequence_3hex{ 8d4c2428 68???????? 51 e8???????? 56 8d542434 }
$sequence_4hex{ 8bfd 8d44240c f3a5 8b5500 8b3d???????? 6a00 }
$sequence_5hex{ 885c3438 c744241804010000 ff15???????? 8dbc2458010000 83c9ff 33c0 }
$sequence_6hex{ 50 8d4c2424 56 51 52 }
$sequence_7hex{ f3a4 885c0444 bf???????? 83c9ff 33c0 33f6 }
$sequence_8hex{ 83c40c 85c0 7e2b eb08 }
$sequence_9hex{ e8???????? 68c0270900 ff15???????? e8???????? 5f }

Condition

7 of them and filesize < 40960

In plain words (Heuristic)

  • The file must be smaller than 40960 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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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: 70e37162-3a73-596a-8d7d-42b9d85b78f7

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