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MALPEDIA_Win_Mosquito_Auto

autogenerated rule brought to you by yara-signator

MalwareMosquitoMalpedia 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: Mosquito.

It defines 19 patterns (0 text, 19 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-mosquito-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Mosquito_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "531c9979-7c75-5824-8fa4-bb87c0dcf67e"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mosquito"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.mosquito_auto.yar#L1-L176"
		license_url = "N/A"
		logic_hash = "dcc43f455887bb61be81ee083bf165c94651a19cf91262fb20e7d1eef10d9d29"
		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 = { f7d8 1bc0 83e0b4 83c04c }
		$sequence_1 = { 52 50 6a00 6801c1fd7d }
		$sequence_2 = { 8bfc f3a5 ff942464020000 81c450020000 }
		$sequence_3 = { ff5010 8d4dfc e8???????? 8b45fc }
		$sequence_4 = { e8???????? 6a20 8bf0 e8???????? 8bc8 }
		$sequence_5 = { be9b000000 e9???????? 50 e8???????? }
		$sequence_6 = { be???????? 8bd8 56 6804010000 53 }
		$sequence_7 = { 8bfc f3a5 ff942460020000 81c450020000 85c0 }
		$sequence_8 = { 51 8b55fc 52 8b45f8 50 ff15???????? 8b4dfc }
		$sequence_9 = { 6824080000 50 e8???????? 83c410 }
		$sequence_10 = { 0000 00645657 8b7dc2 0400 }
		$sequence_11 = { 0000 006301 1000 7500 }
		$sequence_12 = { 6a00 ff15???????? 6a00 56 ff15???????? 8903 }
		$sequence_13 = { 0000 00748078 3001 40 }
		$sequence_14 = { 0000 006500 676c 0010 }
		$sequence_15 = { 0000 0018 a0???????? 57 }
		$sequence_16 = { 0000 0001 1001 c550f0 8b8078005900 }
		$sequence_17 = { 0000 0032 08804d086440 5e }
		$sequence_18 = { 6a20 8bd8 e8???????? 8bc8 }

	condition:
		7 of them and filesize < 1015808
}

Strings (19 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ f7d8 1bc0 83e0b4 83c04c }
$sequence_1hex{ 52 50 6a00 6801c1fd7d }
$sequence_2hex{ 8bfc f3a5 ff942464020000 81c450020000 }
$sequence_3hex{ ff5010 8d4dfc e8???????? 8b45fc }
$sequence_4hex{ e8???????? 6a20 8bf0 e8???????? 8bc8 }
$sequence_5hex{ be9b000000 e9???????? 50 e8???????? }
$sequence_6hex{ be???????? 8bd8 56 6804010000 53 }
$sequence_7hex{ 8bfc f3a5 ff942460020000 81c450020000 85c0 }
$sequence_8hex{ 51 8b55fc 52 8b45f8 50 ff15???????? 8b4dfc }
$sequence_9hex{ 6824080000 50 e8???????? 83c410 }
$sequence_10hex{ 0000 00645657 8b7dc2 0400 }
$sequence_11hex{ 0000 006301 1000 7500 }
$sequence_12hex{ 6a00 ff15???????? 6a00 56 ff15???????? 8903 }
$sequence_13hex{ 0000 00748078 3001 40 }
$sequence_14hex{ 0000 006500 676c 0010 }
$sequence_15hex{ 0000 0018 a0???????? 57 }
$sequence_16hex{ 0000 0001 1001 c550f0 8b8078005900 }
$sequence_17hex{ 0000 0032 08804d086440 5e }
$sequence_18hex{ 6a20 8bd8 e8???????? 8bc8 }

Condition

7 of them and filesize < 1015808

In plain words (Heuristic)

  • The file must be smaller than 1015808 (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: 531c9979-7c75-5824-8fa4-bb87c0dcf67e

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