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MALPEDIA_Win_Poscardstealer_Auto

autogenerated rule brought to you by yara-signator

MalwarePoscardstealerMalpedia 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: Poscardstealer.

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

Summary generated from the rule's metadata and condition.

Rule source

win-poscardstealer-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Poscardstealer_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "93381abe-05cc-5861-8a9d-79af1fc11ddc"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.poscardstealer"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.poscardstealer_auto.yar#L1-L122"
		license_url = "N/A"
		logic_hash = "0e2c0b695090149a314e3640c533f832c1baa01c7b5cdf940bb738b4a06f3aef"
		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 = { 33c0 668b4d08 663b88600a4200 740d 83c002 }
		$sequence_1 = { 64a300000000 8b35???????? 8975ac 3b35???????? 0f84fc000000 }
		$sequence_2 = { 8917 83c704 89bd80edffff eb68 8b8d84edffff 3bd1 }
		$sequence_3 = { 8b45b0 56 50 51 ff15???????? 8b5590 8bcf }
		$sequence_4 = { 83ff0c 7e79 8bc7 f7d8 8945c8 eb03 8b45c8 }
		$sequence_5 = { 50 8d45f4 64a300000000 8b7508 8b4528 }
		$sequence_6 = { 8bce c645fc12 e8???????? 837de810 c645fc01 }
		$sequence_7 = { 68???????? 50 e8???????? 83c40c 3bc7 7514 83fe01 }
		$sequence_8 = { 8d34c5f05b4200 833e00 7513 50 e8???????? 59 85c0 }
		$sequence_9 = { 8b45e0 8a8064614200 08443b1d 0fb64601 }

	condition:
		7 of them and filesize < 362496
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 33c0 668b4d08 663b88600a4200 740d 83c002 }
$sequence_1hex{ 64a300000000 8b35???????? 8975ac 3b35???????? 0f84fc000000 }
$sequence_2hex{ 8917 83c704 89bd80edffff eb68 8b8d84edffff 3bd1 }
$sequence_3hex{ 8b45b0 56 50 51 ff15???????? 8b5590 8bcf }
$sequence_4hex{ 83ff0c 7e79 8bc7 f7d8 8945c8 eb03 8b45c8 }
$sequence_5hex{ 50 8d45f4 64a300000000 8b7508 8b4528 }
$sequence_6hex{ 8bce c645fc12 e8???????? 837de810 c645fc01 }
$sequence_7hex{ 68???????? 50 e8???????? 83c40c 3bc7 7514 83fe01 }
$sequence_8hex{ 8d34c5f05b4200 833e00 7513 50 e8???????? 59 85c0 }
$sequence_9hex{ 8b45e0 8a8064614200 08443b1d 0fb64601 }

Condition

7 of them and filesize < 362496

In plain words (Heuristic)

  • The file must be smaller than 362496 (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: 93381abe-05cc-5861-8a9d-79af1fc11ddc

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