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MALPEDIA_Win_Temp_Stealer_Auto

autogenerated rule brought to you by yara-signator

MalwareTemp 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: Temp Stealer.

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

Summary generated from the rule's metadata and condition.

Rule source

win-temp-stealer-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Temp_Stealer_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "2a3d7e56-ade6-5388-9ba8-30989bb7bbe4"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.temp_stealer"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.temp_stealer_auto.yar#L1-L132"
		license_url = "N/A"
		logic_hash = "911de5b49c403e2d606ceae10e3002c8ec55903f278dc5636e841d1eb2417be1"
		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 = { e9???????? 418bed 488d158d460200 4d8bfa e9???????? 418bc5 f7d0 }
		$sequence_1 = { 410f93c1 8bd3 418bcd 488d45d7 4584c9 480f4545d7 41ffc5 }
		$sequence_2 = { 48837f1808 7203 488b17 4c8bc3 488d8d00020000 e8???????? 488d9500020000 }
		$sequence_3 = { 48634804 488d442430 4803c8 4533c0 8bd7 e8???????? 41f6de }
		$sequence_4 = { e8???????? 408ac7 488b9c2428010000 4881c4e0000000 415f 415e 415d }
		$sequence_5 = { 4c89642420 4c89642430 4c896c2438 4c8d0d697a0300 8bd3 488d4c2420 e8???????? }
		$sequence_6 = { 488bd0 488d4c2440 e8???????? 488d1574670300 488d4d18 e8???????? 488bd0 }
		$sequence_7 = { 483bc3 742c 488d4c2450 e8???????? 0f1003 0f11442450 }
		$sequence_8 = { b908000000 4c8d058f660100 488d1590660100 e8???????? 4c8d0d9c660100 b90b000000 }
		$sequence_9 = { 488d4c2458 e8???????? 488d4dc8 48395de0 480f434dc8 ff15???????? 83f8ff }

	condition:
		7 of them and filesize < 652288
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ e9???????? 418bed 488d158d460200 4d8bfa e9???????? 418bc5 f7d0 }
$sequence_1hex{ 410f93c1 8bd3 418bcd 488d45d7 4584c9 480f4545d7 41ffc5 }
$sequence_2hex{ 48837f1808 7203 488b17 4c8bc3 488d8d00020000 e8???????? 488d9500020000 }
$sequence_3hex{ 48634804 488d442430 4803c8 4533c0 8bd7 e8???????? 41f6de }
$sequence_4hex{ e8???????? 408ac7 488b9c2428010000 4881c4e0000000 415f 415e 415d }
$sequence_5hex{ 4c89642420 4c89642430 4c896c2438 4c8d0d697a0300 8bd3 488d4c2420 e8???????? }
$sequence_6hex{ 488bd0 488d4c2440 e8???????? 488d1574670300 488d4d18 e8???????? 488bd0 }
$sequence_7hex{ 483bc3 742c 488d4c2450 e8???????? 0f1003 0f11442450 }
$sequence_8hex{ b908000000 4c8d058f660100 488d1590660100 e8???????? 4c8d0d9c660100 b90b000000 }
$sequence_9hex{ 488d4c2458 e8???????? 488d4dc8 48395de0 480f434dc8 ff15???????? 83f8ff }

Condition

7 of them and filesize < 652288

In plain words (Heuristic)

  • The file must be smaller than 652288 (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: 2a3d7e56-ade6-5388-9ba8-30989bb7bbe4

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