Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Lobshot_Auto

autogenerated rule brought to you by yara-signator

MalwareLobshotMalpedia 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: Lobshot.

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

Summary generated from the rule's metadata and condition.

Rule source

win-lobshot-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Lobshot_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "3aedc20c-8fcd-5f2e-8950-262fe5205985"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.lobshot"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.lobshot_auto.yar#L1-L122"
		license_url = "N/A"
		logic_hash = "bcec013374c9453f37ec62b298554ce41d2a5197eff32b1fed483a5323372e4a"
		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 = { c744241800000000 c744241c00000000 ff15???????? 8bf8 }
		$sequence_1 = { 46 8b94b1540b0000 8b4dfc 0fb70499 }
		$sequence_2 = { 8b35???????? 8d44240c 50 57 c744241457545351 c744241875657279 }
		$sequence_3 = { 50 ff15???????? 8bd8 85db 7477 8b3d???????? }
		$sequence_4 = { 6a00 56 ff15???????? 85c0 7417 50 ff15???????? }
		$sequence_5 = { 7571 8b4c2414 33d2 668911 8d4c244c 51 }
		$sequence_6 = { 33ed 66893c01 8b0d???????? 88540102 83c003 3b05???????? 7291 }
		$sequence_7 = { 8a5a01 8d5202 80eb61 85ff 7417 c0e004 2c10 }
		$sequence_8 = { 894d08 66890c70 8b5740 8b4f3c }
		$sequence_9 = { 88040a ff4614 33c0 2186b4160000 668986b0160000 5e c3 }

	condition:
		7 of them and filesize < 247808
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ c744241800000000 c744241c00000000 ff15???????? 8bf8 }
$sequence_1hex{ 46 8b94b1540b0000 8b4dfc 0fb70499 }
$sequence_2hex{ 8b35???????? 8d44240c 50 57 c744241457545351 c744241875657279 }
$sequence_3hex{ 50 ff15???????? 8bd8 85db 7477 8b3d???????? }
$sequence_4hex{ 6a00 56 ff15???????? 85c0 7417 50 ff15???????? }
$sequence_5hex{ 7571 8b4c2414 33d2 668911 8d4c244c 51 }
$sequence_6hex{ 33ed 66893c01 8b0d???????? 88540102 83c003 3b05???????? 7291 }
$sequence_7hex{ 8a5a01 8d5202 80eb61 85ff 7417 c0e004 2c10 }
$sequence_8hex{ 894d08 66890c70 8b5740 8b4f3c }
$sequence_9hex{ 88040a ff4614 33c0 2186b4160000 668986b0160000 5e c3 }

Condition

7 of them and filesize < 247808

In plain words (Heuristic)

  • The file must be smaller than 247808 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

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: 3aedc20c-8fcd-5f2e-8950-262fe5205985

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