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MALPEDIA_Win_Pkybot_Auto

autogenerated rule brought to you by yara-signator

MalwarePkybotMalpedia 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: Pkybot.

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

Summary generated from the rule's metadata and condition.

Rule source

win-pkybot-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Pkybot_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "dad123b0-5214-5e40-a4ae-64b9bde878fa"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.pkybot"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.pkybot_auto.yar#L1-L117"
		license_url = "N/A"
		logic_hash = "1d6798070fba3daea25cacf6da3969ebfcd59365ae5b1adbcd1b6a4bd6c4d903"
		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 = { 813e50450000 750b b80b010000 66394618 7404 }
		$sequence_1 = { 8bf1 f70600020000 7409 ff7604 e8???????? }
		$sequence_2 = { 8b4e20 8b01 ff5010 5f 8bc6 5e 5b }
		$sequence_3 = { b80b010000 66394618 7404 33c0 }
		$sequence_4 = { 53 ff7004 ff30 6aff }
		$sequence_5 = { 85c0 0f848a000000 8d45fc 50 6a00 6a00 6a19 }
		$sequence_6 = { 6a01 ff7004 ff15???????? 8bf0 83feff }
		$sequence_7 = { 8bec a1???????? 83ec10 85c0 743c 833d????????00 7433 }
		$sequence_8 = { 8bf8 8d45f8 50 8d85ecfdffff }
		$sequence_9 = { ff35???????? e8???????? 59 893d???????? 893d???????? }

	condition:
		7 of them and filesize < 204800
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 813e50450000 750b b80b010000 66394618 7404 }
$sequence_1hex{ 8bf1 f70600020000 7409 ff7604 e8???????? }
$sequence_2hex{ 8b4e20 8b01 ff5010 5f 8bc6 5e 5b }
$sequence_3hex{ b80b010000 66394618 7404 33c0 }
$sequence_4hex{ 53 ff7004 ff30 6aff }
$sequence_5hex{ 85c0 0f848a000000 8d45fc 50 6a00 6a00 6a19 }
$sequence_6hex{ 6a01 ff7004 ff15???????? 8bf0 83feff }
$sequence_7hex{ 8bec a1???????? 83ec10 85c0 743c 833d????????00 7433 }
$sequence_8hex{ 8bf8 8d45f8 50 8d85ecfdffff }
$sequence_9hex{ ff35???????? e8???????? 59 893d???????? 893d???????? }

Condition

7 of them and filesize < 204800

In plain words (Heuristic)

  • The file must be smaller than 204800 (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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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

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: dad123b0-5214-5e40-a4ae-64b9bde878fa

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