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MALPEDIA_Win_Sysraw_Stealer_Auto

autogenerated rule brought to you by yara-signator

MalwareSysraw StealerMalpedia 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: Sysraw Stealer.

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

Summary generated from the rule's metadata and condition.

Rule source

win-sysraw-stealer-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Sysraw_Stealer_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "2dacca50-75f4-571e-8414-248370e25c4f"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.sysraw_stealer"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.sysraw_stealer_auto.yar#L1-L124"
		license_url = "N/A"
		logic_hash = "c6c1f0c61f70970454e86ed60c3c7743b18f85228c5050098b903b7fcf3084ed"
		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 = { ffd6 53 e8???????? ffd6 53 6a0d e8???????? }
		$sequence_1 = { 33c9 8955bc 894de4 ba3f000000 3bca 0f8f0c020000 83f910 }
		$sequence_2 = { 8bc8 f7d1 23ca 8b54240c 23c2 8b542414 33c8 }
		$sequence_3 = { c7404c00000800 c7405000001000 c7405400002000 c7405800004000 c7405c00008000 c7406000000001 }
		$sequence_4 = { 898d0cfeffff 6a08 68???????? 8d8d78ffffff 89bdfcfeffff 89bdf8feffff 89bdf4feffff }
		$sequence_5 = { 6a04 ff15???????? 83c420 9b }
		$sequence_6 = { 50 52 56 ff512c 8b4590 8b8d5cfeffff }
		$sequence_7 = { f7d8 1bc0 f7d8 0bc8 7507 c745ec01000000 }
		$sequence_8 = { 50 ffd3 8b4de4 8bd0 }
		$sequence_9 = { 8b5590 c742107f520e51 8b4590 c740148c68059b 8b4d90 c74118abd9831f }

	condition:
		7 of them and filesize < 1540096
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ffd6 53 e8???????? ffd6 53 6a0d e8???????? }
$sequence_1hex{ 33c9 8955bc 894de4 ba3f000000 3bca 0f8f0c020000 83f910 }
$sequence_2hex{ 8bc8 f7d1 23ca 8b54240c 23c2 8b542414 33c8 }
$sequence_3hex{ c7404c00000800 c7405000001000 c7405400002000 c7405800004000 c7405c00008000 c7406000000001 }
$sequence_4hex{ 898d0cfeffff 6a08 68???????? 8d8d78ffffff 89bdfcfeffff 89bdf8feffff 89bdf4feffff }
$sequence_5hex{ 6a04 ff15???????? 83c420 9b }
$sequence_6hex{ 50 52 56 ff512c 8b4590 8b8d5cfeffff }
$sequence_7hex{ f7d8 1bc0 f7d8 0bc8 7507 c745ec01000000 }
$sequence_8hex{ 50 ffd3 8b4de4 8bd0 }
$sequence_9hex{ 8b5590 c742107f520e51 8b4590 c740148c68059b 8b4d90 c74118abd9831f }

Condition

7 of them and filesize < 1540096

In plain words (Heuristic)

  • The file must be smaller than 1540096 (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: 2dacca50-75f4-571e-8414-248370e25c4f

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