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MALPEDIA_Win_Sisfader_Auto

autogenerated rule brought to you by yara-signator

MalwareSisfaderMalpedia 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 / 73

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Sisfader.

It defines 30 patterns (0 text, 30 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-sisfader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Sisfader_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "a85deabd-1713-5712-ad21-30c4dbfed6c4"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.sisfader"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.sisfader_auto.yar#L1-L274"
		license_url = "N/A"
		logic_hash = "183bda12581d1ae277a0dafad31da6228edc983478c44a7bd0986aab756d3f6f"
		score = 75
		quality = 73
		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 = { e8???????? 85c0 b91d000000 0f44d9 }
		$sequence_1 = { 85c9 741f 33c0 85c9 }
		$sequence_2 = { 8955f0 8b45f8 8b4838 894dcc }
		$sequence_3 = { 33c9 e8???????? 85c0 7502 eb7c }
		$sequence_4 = { ff15???????? a3???????? 833d????????00 7510 6a00 }
		$sequence_5 = { 85c0 754b 8b4f04 83c124 }
		$sequence_6 = { c705????????07000000 8b442438 8905???????? c705????????00000000 }
		$sequence_7 = { 8b442440 89442420 837c242001 7425 }
		$sequence_8 = { ff15???????? 89442450 837c245000 7402 }
		$sequence_9 = { 7568 8d43dc 8906 83f824 }
		$sequence_10 = { 6bc800 8b550c 8b040a 50 ff15???????? }
		$sequence_11 = { 33c0 e9???????? e9???????? ff15???????? }
		$sequence_12 = { 75f5 c70665632985 663939 8b3d???????? 7407 }
		$sequence_13 = { 0f84cd010000 6683f92e 750f 6683bc248000000000 0f84b8010000 ffc5 }
		$sequence_14 = { 7424 85c9 7420 8bc3 660f1f440000 8bc8 }
		$sequence_15 = { 8bda 8bf9 ff15???????? 85c0 0f8584000000 6a06 6a01 }
		$sequence_16 = { eb2e 8b4dfc c7411001000000 eb11 8b55fc 8b02 8b4df4 }
		$sequence_17 = { 8b3d???????? 81c600010000 c745dcaaeeddff c745e4e1f00000 }
		$sequence_18 = { 83c418 85c0 7502 eb67 8b4dfc }
		$sequence_19 = { 85c0 741d 8bd3 0f1f440000 8bc2 ffc2 }
		$sequence_20 = { 6685c0 0f8496010000 6683f82e 750b }
		$sequence_21 = { 83ec60 c745fc00000000 c745e000000000 6a40 8b450c }
		$sequence_22 = { 837c242002 7441 837c242003 745d 837c242004 7479 837c242005 }
		$sequence_23 = { 7405 e9???????? 83bc248000000000 7539 }
		$sequence_24 = { 33c9 85c0 7415 0f1f00 8bc1 }
		$sequence_25 = { 6a00 6a00 6a01 e8???????? 83c40c eb38 6a00 }
		$sequence_26 = { 56 57 8b7d10 8b7720 c706aaeeddff 8b420c 89460c }
		$sequence_27 = { 8b4204 8bcf 83c024 50 e8???????? }
		$sequence_28 = { 6bc800 8b5510 0fb7440a40 85c0 }
		$sequence_29 = { e8???????? 33c0 83f801 7425 baffffffff }

	condition:
		7 of them and filesize < 417792
}

Strings (30 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ e8???????? 85c0 b91d000000 0f44d9 }
$sequence_1hex{ 85c9 741f 33c0 85c9 }
$sequence_2hex{ 8955f0 8b45f8 8b4838 894dcc }
$sequence_3hex{ 33c9 e8???????? 85c0 7502 eb7c }
$sequence_4hex{ ff15???????? a3???????? 833d????????00 7510 6a00 }
$sequence_5hex{ 85c0 754b 8b4f04 83c124 }
$sequence_6hex{ c705????????07000000 8b442438 8905???????? c705????????00000000 }
$sequence_7hex{ 8b442440 89442420 837c242001 7425 }
$sequence_8hex{ ff15???????? 89442450 837c245000 7402 }
$sequence_9hex{ 7568 8d43dc 8906 83f824 }
$sequence_10hex{ 6bc800 8b550c 8b040a 50 ff15???????? }
$sequence_11hex{ 33c0 e9???????? e9???????? ff15???????? }
$sequence_12hex{ 75f5 c70665632985 663939 8b3d???????? 7407 }
$sequence_13hex{ 0f84cd010000 6683f92e 750f 6683bc248000000000 0f84b8010000 ffc5 }
$sequence_14hex{ 7424 85c9 7420 8bc3 660f1f440000 8bc8 }
$sequence_15hex{ 8bda 8bf9 ff15???????? 85c0 0f8584000000 6a06 6a01 }
$sequence_16hex{ eb2e 8b4dfc c7411001000000 eb11 8b55fc 8b02 8b4df4 }
$sequence_17hex{ 8b3d???????? 81c600010000 c745dcaaeeddff c745e4e1f00000 }
$sequence_18hex{ 83c418 85c0 7502 eb67 8b4dfc }
$sequence_19hex{ 85c0 741d 8bd3 0f1f440000 8bc2 ffc2 }
$sequence_20hex{ 6685c0 0f8496010000 6683f82e 750b }
$sequence_21hex{ 83ec60 c745fc00000000 c745e000000000 6a40 8b450c }
$sequence_22hex{ 837c242002 7441 837c242003 745d 837c242004 7479 837c242005 }
$sequence_23hex{ 7405 e9???????? 83bc248000000000 7539 }
$sequence_24hex{ 33c9 85c0 7415 0f1f00 8bc1 }
$sequence_25hex{ 6a00 6a00 6a01 e8???????? 83c40c eb38 6a00 }
$sequence_26hex{ 56 57 8b7d10 8b7720 c706aaeeddff 8b420c 89460c }
$sequence_27hex{ 8b4204 8bcf 83c024 50 e8???????? }
$sequence_28hex{ 6bc800 8b5510 0fb7440a40 85c0 }
$sequence_29hex{ e8???????? 33c0 83f801 7425 baffffffff }

Condition

7 of them and filesize < 417792

In plain words (Heuristic)

  • The file must be smaller than 417792 (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: a85deabd-1713-5712-ad21-30c4dbfed6c4

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